NTLM signing is almost here. Clean up tests and add test verifying the

[siplcs.git] / src / sipe.c

/**
 * @file sip-exchange.c
 *
 * purple
 *
 * Copyright (C) 2007 Anibal Avelar "Fixxxer"<avelar@gmail.com>
 * Copyright (C) 2005 Thomas Butter <butter@uni-mannheim.de>
 *
 * ***
 * Thanks to Google's Summer of Code Program and the helpful mentors
 * ***
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _WIN32
#include "sip-internal.h"
#else /* _WIN32 */
#ifdef _DLL
#define _WS2TCPIP_H_
#define _WINSOCK2API_
#define _LIBC_INTERNAL_
#endif /* _DLL */

#include "internal.h"
#endif /* _WIN32 */

#include "accountopt.h"
#include "blist.h"
#include "conversation.h"
#include "dnsquery.h"
#include "debug.h"
#include "notify.h"
#include "privacy.h"
#include "prpl.h"
#include "plugin.h"
#include "util.h"
#include "version.h"
#include "network.h"
#include "xmlnode.h"

#include "sipe.h"
#include "sip-ntlm.h"
#include "sipkrb5.h"

#include "sipmsg.h"
#include "sipe-sign.h"
#include "dnssrv.h"

static char *gentag()
{
        return g_strdup_printf("%04d%04d", rand() & 0xFFFF, rand() & 0xFFFF);
}

static char *genbranch()
{
        return g_strdup_printf("z9hG4bK%04X%04X%04X%04X%04X",
                rand() & 0xFFFF, rand() & 0xFFFF, rand() & 0xFFFF,
                rand() & 0xFFFF, rand() & 0xFFFF);
}

static char *gencallid()
{
        return g_strdup_printf("%04Xg%04Xa%04Xi%04Xm%04Xt%04Xb%04Xx%04Xx",
                rand() & 0xFFFF, rand() & 0xFFFF, rand() & 0xFFFF,
                rand() & 0xFFFF, rand() & 0xFFFF, rand() & 0xFFFF,
                rand() & 0xFFFF, rand() & 0xFFFF);
}

static const char *sipe_list_icon(PurpleAccount *a, PurpleBuddy *b)
{
        return "sipe";
}

static void sipe_keep_alive(PurpleConnection *gc)
{
        struct sipe_account_data *sip = gc->proto_data;
        if (sip->udp) { /* in case of UDP send a packet only with a 0 byte to
                         remain in the NAT table */
                gchar buf[2] = {0, 0};
                purple_debug_info("sipe", "sending keep alive\n");
                sendto(sip->fd, buf, 1, 0, (struct sockaddr*)&sip->serveraddr, sizeof(struct sockaddr_in));
        }
        return;
}

static gboolean process_register_response(struct sipe_account_data *sip, struct sipmsg *msg, struct transaction *tc);

static void sipe_input_cb_ssl(gpointer data, PurpleSslConnection *gsc, PurpleInputCondition cond);
static void sipe_ssl_connect_failure(PurpleSslConnection *gsc, PurpleSslErrorType error, 
                                     gpointer data);

static void send_notify(struct sipe_account_data *sip, struct sipe_watcher *);

static void send_service(struct sipe_account_data *sip);
static void sipe_subscribe_to_name(struct sipe_account_data *sip, const char * buddy_name);
static void send_publish(struct sipe_account_data *sip);

static void do_notifies(struct sipe_account_data *sip)
{
        GSList *tmp = sip->watcher;
        purple_debug_info("sipe", "do_notifies()\n");
        //if ((sip->republish != -1) || sip->republish < time(NULL)) {
        //      if (purple_account_get_bool(sip->account, "doservice", TRUE)) {
        //              send_service(sip);
        //      }
        //}

        while (tmp) {
                purple_debug_info("sipe", "notifying %s\n", ((struct sipe_watcher*)tmp->data)->name);
                send_notify(sip, tmp->data);
                tmp = tmp->next;
        }
}

static void sipe_set_status(PurpleAccount *account, PurpleStatus *status)
{
        PurpleStatusPrimitive primitive = purple_status_type_get_primitive(purple_status_get_type(status));
        struct sipe_account_data *sip = NULL;

        if (!purple_status_is_active(status))
                return;

        if (account->gc)
                sip = account->gc->proto_data;

        if (sip)
        {
                g_free(sip->status);
                if (primitive == PURPLE_STATUS_AVAILABLE)
                        sip->status = g_strdup("available");
                else
                        sip->status = g_strdup("busy");

                do_notifies(sip);
        }
}

static struct sip_connection *connection_find(struct sipe_account_data *sip, int fd)
{
        struct sip_connection *ret = NULL;
        GSList *entry = sip->openconns;
        while (entry) {
                ret = entry->data;
                if (ret->fd == fd) return ret;
                entry = entry->next;
        }
        return NULL;
}

static struct sipe_watcher *watcher_find(struct sipe_account_data *sip,
                const gchar *name)
{
        struct sipe_watcher *watcher;
        GSList *entry = sip->watcher;
        while (entry) {
                watcher = entry->data;
                if (!strcmp(name, watcher->name)) return watcher;
                entry = entry->next;
        }
        return NULL;
}

static struct sipe_watcher *watcher_create(struct sipe_account_data *sip,
                const gchar *name, const gchar *callid, const gchar *ourtag,
                const gchar *theirtag, gboolean needsxpidf)
{
        struct sipe_watcher *watcher = g_new0(struct sipe_watcher, 1);
        watcher->name = g_strdup(name);
        watcher->dialog.callid = g_strdup(callid);
        watcher->dialog.ourtag = g_strdup(ourtag);
        watcher->dialog.theirtag = g_strdup(theirtag);
        watcher->needsxpidf = needsxpidf;
        sip->watcher = g_slist_append(sip->watcher, watcher);
        return watcher;
}

static void watcher_remove(struct sipe_account_data *sip, const gchar *name)
{
        struct sipe_watcher *watcher = watcher_find(sip, name);
        sip->watcher = g_slist_remove(sip->watcher, watcher);
        g_free(watcher->name);
        g_free(watcher->dialog.callid);
        g_free(watcher->dialog.ourtag);
        g_free(watcher->dialog.theirtag);
        g_free(watcher);
}

static struct sip_connection *connection_create(struct sipe_account_data *sip, int fd)
{
        struct sip_connection *ret = g_new0(struct sip_connection, 1);
        ret->fd = fd;
        sip->openconns = g_slist_append(sip->openconns, ret);
        return ret;
}

static void connection_remove(struct sipe_account_data *sip, int fd)
{
        struct sip_connection *conn = connection_find(sip, fd);
        sip->openconns = g_slist_remove(sip->openconns, conn);
        if (conn->inputhandler) purple_input_remove(conn->inputhandler);
        g_free(conn->inbuf);
        g_free(conn);
}

static void connection_free_all(struct sipe_account_data *sip)
{
        struct sip_connection *ret = NULL;
        GSList *entry = sip->openconns;
        while (entry) {
                ret = entry->data;
                connection_remove(sip, ret->fd);
                entry = sip->openconns;
        }
}

static void sipe_add_buddy(PurpleConnection *gc, PurpleBuddy *buddy, PurpleGroup *group)
{
        struct sipe_account_data *sip = (struct sipe_account_data *)gc->proto_data;
        struct sipe_buddy *b;
        if (strncmp("sip:", buddy->name, 4)) {
                gchar *buf = g_strdup_printf("sip:%s", buddy->name);
                purple_blist_rename_buddy(buddy, buf);
                g_free(buf);
        }
        if (!g_hash_table_lookup(sip->buddies, buddy->name)) {
                b = g_new0(struct sipe_buddy, 1);
                purple_debug_info("sipe", "sipe_add_buddy %s\n", buddy->name);
                b->name = g_strdup(buddy->name);
                g_hash_table_insert(sip->buddies, b->name, b);
        } else {
                purple_debug_info("sipe", "buddy %s already in internal list\n", buddy->name);
        }
}

static void sipe_get_buddies(PurpleConnection *gc)
{
        PurpleBlistNode *gnode, *cnode, *bnode;

        purple_debug_info("sipe", "sipe_get_buddies\n");

        for (gnode = purple_get_blist()->root; gnode; gnode = gnode->next) {
                if (!PURPLE_BLIST_NODE_IS_GROUP(gnode)) continue;
                for (cnode = gnode->child; cnode; cnode = cnode->next) {
                        if (!PURPLE_BLIST_NODE_IS_CONTACT(cnode)) continue;
                        for (bnode = cnode->child; bnode; bnode = bnode->next) {
                                if (!PURPLE_BLIST_NODE_IS_BUDDY(bnode)) continue;
                                if (((PurpleBuddy*)bnode)->account == gc->account)
                                        sipe_add_buddy(gc, (PurpleBuddy*)bnode, (PurpleGroup *)gnode);
                        }
                }
        }
}

static void sipe_remove_buddy(PurpleConnection *gc, PurpleBuddy *buddy, PurpleGroup *group)
{
        struct sipe_account_data *sip = (struct sipe_account_data *)gc->proto_data;
        struct sipe_buddy *b = g_hash_table_lookup(sip->buddies, buddy->name);
        g_hash_table_remove(sip->buddies, buddy->name);
        g_free(b->name);
        g_free(b);
}

static GList *sipe_status_types(PurpleAccount *acc)
{
        PurpleStatusType *type;
        GList *types = NULL;

        type = purple_status_type_new_with_attrs(
                PURPLE_STATUS_AVAILABLE, NULL, NULL, TRUE, TRUE, FALSE,
                "message", _("Message"), purple_value_new(PURPLE_TYPE_STRING),
                NULL);
        types = g_list_append(types, type);

        type = purple_status_type_new_full(
                PURPLE_STATUS_OFFLINE, NULL, NULL, TRUE, TRUE, FALSE);
        types = g_list_append(types, type);

        return types;
}

//static struct sipe_krb5_auth krb5_auth;
static gchar *auth_header_without_newline(struct sipe_account_data *sip, struct sip_auth *auth, struct sipmsg * msg, gboolean force_reauth)
{
        const gchar *method = msg->method;
        const gchar *target = msg->target;
        gchar noncecount[9];
        gchar *response;
        gchar *ret;
        gchar *tmp;
        const char *authdomain;
        const char *authuser;
        const char *krb5_realm;
        const char *host;
        gchar      *krb5_token = NULL;

        authdomain = purple_account_get_string(sip->account, "authdomain", "");
        authuser = purple_account_get_string(sip->account, "authuser", sip->username);

        // XXX FIXME: Get this info from the account dialogs and/or /etc/krb5.conf
        //            and do error checking

        // KRB realm should always be uppercase
        //krb5_realm = g_strup(purple_account_get_string(sip->account, "krb5_realm", ""));

        if (sip->realhostname) {
                host = sip->realhostname;
        } else if (purple_account_get_bool(sip->account, "use_proxy", TRUE)) {
                host = purple_account_get_string(sip->account, "proxy", "");
        } else {
                host = sip->sipdomain;
        }

        /*gboolean new_auth = krb5_auth.gss_context == NULL;
        if (new_auth) {
                purple_krb5_init_auth(&krb5_auth, authuser, krb5_realm, sip->password, host, "sip");
        }
  
        if (new_auth || force_reauth) {
                krb5_token = krb5_auth.base64_token;
        }

        purple_krb5_init_auth(&krb5_auth, authuser, krb5_realm, sip->password, host, "sip");
        krb5_token = krb5_auth.base64_token;*/

        if (!authuser || strlen(authuser) < 1) {
                authuser = sip->username;
        }

        if (auth->type == 1) { /* Digest */
                sprintf(noncecount, "%08d", auth->nc++);
                response = purple_cipher_http_digest_calculate_response(
                                                        "md5", method, target, NULL, NULL,
                                                        auth->nonce, noncecount, NULL, auth->digest_session_key);
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "response %s\n", response);

                ret = g_strdup_printf("Digest username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", nc=\"%s\", response=\"%s\"", authuser, auth->realm, auth->nonce, target, noncecount, response);
                g_free(response);
                return ret;
        } else if (auth->type == 2) { /* NTLM */
                // If we have a signature for the message, include that
                if (msg->signature) {
                        tmp = g_strdup_printf("NTLM qop=\"auth\", realm=\"%s\", targetname=\"%s\", response=\"%s\"", auth->realm, auth->target, msg->signature);
                        return tmp;
                }

                if (auth->nc == 3 && auth->nonce) {
                        /* TODO: Don't hardcode "purple" as the hostname */
                        gchar * gssapi_data = purple_ntlm_gen_authenticate(authuser, sip->password, "purple", authdomain, (const guint8 *)auth->nonce, &auth->flags);
                        //auth->ntlm_key = purple_ntlm_get_key();
                        //printf ("ntlmkey == now NULL? %i\n", auth->ntlm_key == NULL);
                        tmp = g_strdup_printf("NTLM qop=\"auth\", opaque=\"%s\", realm=\"%s\", targetname=\"%s\", gssapi-data=\"%s\"", auth->opaque, auth->realm, auth->target, gssapi_data);
                        g_free(gssapi_data);
                        return tmp;
                }

                tmp = g_strdup_printf("NTLM qop=\"auth\", realm=\"%s\", targetname=\"%s\", gssapi-data=\"\"", auth->realm, auth->target);
                return tmp;
        } else if (auth->type == 3) {
                /* Kerberos */
                if (auth->nc == 3) {
                        /*if (new_auth || force_reauth) {
                                printf ("krb5 token not NULL, so adding gssapi-data attribute; op = %s\n", auth->opaque);
                                if (auth->opaque) {
                                        tmp = g_strdup_printf("Kerberos qop=\"auth\", realm=\"%s\", opaque=\"%s\", targetname=\"%s\", gssapi-data=\"%s\"", "SIP Communications Service", auth->opaque, auth->target, krb5_token);
                                } else {
                                        tmp = g_strdup_printf("Kerberos qop=\"auth\", realm=\"%s\", targetname=\"%s\", gssapi-data=\"%s\"", "SIP Communications Service", auth->target, krb5_token);
                                }
                        } else {
                                //gchar * mic = purple_krb5_get_mic_for_sipmsg(&krb5_auth, msg);
                                gchar * mic = "MICTODO";
                                printf ("krb5 token is NULL, so adding response attribute with mic = %s, op=%s\n", mic, auth->opaque);
                                //tmp = g_strdup_printf("Kerberos qop=\"auth\", realm=\"%s\", opaque=\"%s\", targetname=\"%s\", response=\"%s\"", "SIP Communications Service", auth->opaque, auth->target, mic);
                                //tmp = g_strdup_printf("Kerberos qop=\"auth\", realm=\"%s\", opaque=\"%s\", targetname=\"%s\"", "SIP Communications Service",
                                                //auth->opaque ? auth->opaque : "", auth->target);
                                tmp = g_strdup_printf("Kerberos qop=\"auth\", realm=\"%s\", targetname=\"%s\"", "SIP Communications Service", auth->target);
                                //g_free(mic);
                        }*/
                        return tmp;
                }
                tmp = g_strdup_printf("Kerberos qop=\"auth\", realm=\"%s\", targetname=\"%s\", gssapi-data=\"\"", "SIP Communication Service", auth->target);
        }

        sprintf(noncecount, "%08d", auth->nc++);
        response = purple_cipher_http_digest_calculate_response(
                                                "md5", method, target, NULL, NULL,
                                                auth->nonce, noncecount, NULL, auth->digest_session_key);
        purple_debug(PURPLE_DEBUG_MISC, "sipe", "response %s\n", response);

        ret = g_strdup_printf("Digest username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", nc=\"%s\", response=\"%s\"", authuser, auth->realm, auth->nonce, target, noncecount, response);
        g_free(response);
        return ret;
}

static gchar *auth_header(struct sipe_account_data *sip, struct sip_auth *auth, struct sipmsg * msg, gboolean force_reauth)
{
        gchar *with, *without;

        without = auth_header_without_newline(sip, auth, msg, force_reauth);
        with = g_strdup_printf("%s\r\n", without);
        g_free (without);
        return with;
}


static char *parse_attribute(const char *attrname, const char *source)
{
        const char *tmp, *tmp2;
        char *retval = NULL;
        int len = strlen(attrname);

        if (!strncmp(source, attrname, len)) {
                tmp = source + len;
                tmp2 = g_strstr_len(tmp, strlen(tmp), "\"");
                if (tmp2)
                        retval = g_strndup(tmp, tmp2 - tmp);
                else
                        retval = g_strdup(tmp);
        }

        return retval;
}

static void fill_auth(struct sipe_account_data *sip, gchar *hdr, struct sip_auth *auth)
{
        int i = 0;
        const char *authuser;
        char *tmp;
        gchar **parts;
        const char *krb5_realm;
        const char *host;

        // XXX FIXME: Get this info from the account dialogs and/or /etc/krb5.conf
        //            and do error checking

        // KRB realm should always be uppercase
        /*krb5_realm = g_strup(purple_account_get_string(sip->account, "krb5_realm", ""));

        if (sip->realhostname) {
                host = sip->realhostname;
        } else if (purple_account_get_bool(sip->account, "use_proxy", TRUE)) {
                host = purple_account_get_string(sip->account, "proxy", "");
        } else {
                host = sip->sipdomain;
        }*/

        authuser   = purple_account_get_string(sip->account, "authuser", sip->username);

        if (!authuser || strlen(authuser) < 1) {
                authuser = sip->username;
        }

        if (!hdr) {
                purple_debug_error("sipe", "fill_auth: hdr==NULL\n");
                return;
        }

        if (!g_strncasecmp(hdr, "NTLM", 4)) {
                auth->type = 2;
                parts = g_strsplit(hdr+5, "\", ", 0);
                i = 0;
                while (parts[i]) {
                        //purple_debug_info("sipe", "parts[i] %s\n", parts[i]);
                        if ((tmp = parse_attribute("gssapi-data=\"", parts[i]))) {
                                auth->nonce = g_memdup(purple_ntlm_parse_challenge(tmp, &auth->flags), 8);
                                g_free(tmp);
                        }
                        if ((tmp = parse_attribute("targetname=\"",
                                        parts[i]))) {
                                auth->target = tmp;
                        }
                        else if ((tmp = parse_attribute("realm=\"",
                                        parts[i]))) {
                                auth->realm = tmp;
                        }
                        else if ((tmp = parse_attribute("opaque=\"", parts[i]))) {
                                auth->opaque = tmp;
                        }
                        i++;
                }
                g_strfreev(parts);
                auth->nc = 1;
                if (!strstr(hdr, "gssapi-data")) {
                        auth->nc = 1;
                } else {
                        auth->nc = 3;
                }
                return;
        }

        if (!g_strncasecmp(hdr, "Kerberos", 8)) {
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "setting auth type to Kerberos (3)\r\n");
                auth->type = 3;
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "fill_auth - header: %s\r\n", hdr);
                parts = g_strsplit(hdr+9, "\", ", 0);
                i = 0;
                while (parts[i]) {
                        purple_debug_info("sipe", "krb - parts[i] %s\n", parts[i]);
                        if ((tmp = parse_attribute("gssapi-data=\"", parts[i]))) {
                                /*if (krb5_auth.gss_context == NULL) {
                                        purple_krb5_init_auth(&krb5_auth, authuser, krb5_realm, sip->password, host, "sip");
                                }
                                auth->nonce = g_memdup(krb5_auth.base64_token, 8);*/
                                g_free(tmp);
                        }
                        if ((tmp = parse_attribute("targetname=\"", parts[i]))) {
                                auth->target = tmp;
                        } else if ((tmp = parse_attribute("realm=\"", parts[i]))) {
                                auth->realm = tmp;
                        } else if ((tmp = parse_attribute("opaque=\"", parts[i]))) {
                                auth->opaque = tmp;
                        }
                        i++;
                }
                g_strfreev(parts);
                auth->nc = 3;
                //if (!strstr(hdr, "gssapi-data")) {
                //        auth->nc = 1;
                //} else {
                //        auth->nc = 3;
                //}
                return;
        }

        auth->type = 1;
        parts = g_strsplit(hdr, " ", 0);
        while (parts[i]) {
                if ((tmp = parse_attribute("nonce=\"", parts[i]))) {
                        auth->nonce = tmp;
                }
                else if ((tmp = parse_attribute("realm=\"", parts[i]))) {
                        auth->realm = tmp;
                }
                i++;
        }
        g_strfreev(parts);

        purple_debug(PURPLE_DEBUG_MISC, "sipe", "nonce: %s realm: %s\n", auth->nonce ? auth->nonce : "(null)", auth->realm ? auth->realm : "(null)");
        if (auth->realm) {
                auth->digest_session_key = purple_cipher_http_digest_calculate_session_key(
                                "md5", authuser, auth->realm, sip->password, auth->nonce, NULL);

                auth->nc = 1;
        }
}

static void sipe_canwrite_cb(gpointer data, gint source, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip = gc->proto_data;
        gsize max_write;
        gssize written;

        max_write = purple_circ_buffer_get_max_read(sip->txbuf);

        if (max_write == 0) {
                purple_input_remove(sip->tx_handler);
                sip->tx_handler = 0;
                return;
        }

        written = write(sip->fd, sip->txbuf->outptr, max_write);

        if (written < 0 && errno == EAGAIN)
                written = 0;
        else if (written <= 0) {
                /*TODO: do we really want to disconnect on a failure to write?*/
                purple_connection_error(gc, _("Could not write"));
                return;
        }

        purple_circ_buffer_mark_read(sip->txbuf, written);
}

static void sipe_canwrite_cb_ssl(gpointer data, PurpleSslConnection *gsc, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip = gc->proto_data;
        gsize max_write;
        gssize written;

        max_write = purple_circ_buffer_get_max_read(sip->txbuf);

        if (max_write == 0) {
                purple_input_remove(sip->tx_handler);
                sip->tx_handler = 0;
                return;
        }

        written = purple_ssl_write(sip->gsc, sip->txbuf->outptr, max_write);

        if (written < 0 && errno == EAGAIN)
                written = 0;
        else if (written <= 0) {
                /*TODO: do we really want to disconnect on a failure to write?*/
                purple_connection_error(gc, _("Could not write"));
                return;
        }

        purple_circ_buffer_mark_read(sip->txbuf, written);
}

static void sipe_input_cb(gpointer data, gint source, PurpleInputCondition cond);

static void send_later_cb(gpointer data, gint source, const gchar *error)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip;
        struct sip_connection *conn;

        if (!PURPLE_CONNECTION_IS_VALID(gc))
        {
                if (source >= 0)
                        close(source);
                return;
        }

        if (source < 0) {
                purple_connection_error(gc, _("Could not connect"));
                return;
        }

        sip = gc->proto_data;
        sip->fd = source;
        sip->connecting = FALSE;

        sipe_canwrite_cb(gc, sip->fd, PURPLE_INPUT_WRITE);

        /* If there is more to write now, we need to register a handler */
        if (sip->txbuf->bufused > 0)
                sip->tx_handler = purple_input_add(sip->fd, PURPLE_INPUT_WRITE,
                        sipe_canwrite_cb, gc);

        conn = connection_create(sip, source);
        conn->inputhandler = purple_input_add(sip->fd, PURPLE_INPUT_READ, sipe_input_cb, gc);
}

static void send_later_cb_ssl(gpointer data, PurpleSslConnection *gsc, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip;
        struct sip_connection *conn;

        if (!PURPLE_CONNECTION_IS_VALID(gc))
        {
                purple_ssl_close(gsc);
                return;
        }

        sip = gc->proto_data;
        sip->fd = gsc->fd;
        sip->connecting = FALSE;

        sipe_canwrite_cb_ssl(gc, gsc, PURPLE_INPUT_WRITE);

        /* If there is more to write now, we need to register a handler */
        if (sip->txbuf->bufused > 0)
                purple_ssl_input_add(gsc, sipe_canwrite_cb_ssl, gc);

        conn = connection_create(sip, gsc->fd);
        purple_ssl_input_add(sip->gsc, sipe_input_cb_ssl, gc);
}


static void sendlater(PurpleConnection *gc, const char *buf)
{
        struct sipe_account_data *sip = gc->proto_data;

        if (!sip->connecting) {
                purple_debug_info("sipe", "connecting to %s port %d\n", sip->realhostname ? sip->realhostname : "{NULL}", sip->realport);
                if (sip->use_ssl){
                         sip->gsc = purple_ssl_connect(sip->account,sip->realhostname, sip->realport, send_later_cb_ssl, sipe_ssl_connect_failure, sip->gc);      
                }
                else{
                        if (purple_proxy_connect(gc, sip->account, sip->realhostname, sip->realport, send_later_cb, gc) == NULL) {
                                purple_connection_error(gc, _("Couldn't create socket"));
                        }
                 }
                sip->connecting = TRUE;
        }

        if (purple_circ_buffer_get_max_read(sip->txbuf) > 0)
                purple_circ_buffer_append(sip->txbuf, "\r\n", 2);

        purple_circ_buffer_append(sip->txbuf, buf, strlen(buf));
}

static void sendout_pkt(PurpleConnection *gc, const char *buf)
{
        struct sipe_account_data *sip = gc->proto_data;
        time_t currtime = time(NULL);
        int writelen = strlen(buf);

        purple_debug(PURPLE_DEBUG_MISC, "sipe", "\n\nsending - %s\n######\n%s\n######\n\n", ctime(&currtime), buf);
        if (sip->udp) {
                if (sendto(sip->fd, buf, writelen, 0, (struct sockaddr*)&sip->serveraddr, sizeof(struct sockaddr_in)) < writelen) {
                        purple_debug_info("sipe", "could not send packet\n");
                }
        } else {
                int ret;
                if (sip->fd < 0) {
                        sendlater(gc, buf);
                        return;
                }

                if (sip->tx_handler) {
                        ret = -1;
                        errno = EAGAIN;
                } else{
                  if (sip->gsc){
                        ret = purple_ssl_write(sip->gsc, buf, writelen);
                  }else{  
                        ret = write(sip->fd, buf, writelen);
                  }
               }

                if (ret < 0 && errno == EAGAIN)
                        ret = 0;
                else if (ret <= 0) { /* XXX: When does this happen legitimately? */
                        sendlater(gc, buf);
                        return;
                }

                if (ret < writelen) {
                        if (!sip->tx_handler){
                                if (sip->gsc){
                                     purple_ssl_input_add(sip->gsc, sipe_canwrite_cb_ssl, gc);
                                }
                                else{ 
                                        sip->tx_handler = purple_input_add(sip->fd,
                                        PURPLE_INPUT_WRITE, sipe_canwrite_cb,
                                        gc);
                                 }
                        }

                        /* XXX: is it OK to do this? You might get part of a request sent
                           with part of another. */
                        if (sip->txbuf->bufused > 0)
                                purple_circ_buffer_append(sip->txbuf, "\r\n", 2);

                        purple_circ_buffer_append(sip->txbuf, buf + ret,
                                writelen - ret);
                }
        }
}

static int sipe_send_raw(PurpleConnection *gc, const char *buf, int len)
{
        sendout_pkt(gc, buf);
        return len;
}

static void sendout_sipmsg(struct sipe_account_data *sip, struct sipmsg *msg)
{
        GSList *tmp = msg->headers;
        gchar *name;
        gchar *value;
        GString *outstr = g_string_new("");
        g_string_append_printf(outstr, "%s %s SIP/2.0\r\n", msg->method, msg->target);
        while (tmp) {
                name = ((struct siphdrelement*) (tmp->data))->name;
                value = ((struct siphdrelement*) (tmp->data))->value;
                g_string_append_printf(outstr, "%s: %s\r\n", name, value);
                tmp = g_slist_next(tmp);
        }
        g_string_append_printf(outstr, "\r\n%s", msg->body ? msg->body : "");
        sendout_pkt(sip->gc, outstr->str);
        g_string_free(outstr, TRUE);
}

static void send_sip_response(PurpleConnection *gc, struct sipmsg *msg, int code,
                const char *text, const char *body)
{
        GSList *tmp = msg->headers;
        gchar *name;
        gchar *value;
        GString *outstr = g_string_new("");

        /* When sending the acknowlegements and errors, the content length from the original
           message is still here, but there is no body; we need to make sure we're sending the
           correct content length */
        sipmsg_remove_header(msg, "Content-Length");
        if (body) {
                gchar len[12];
                sprintf(len, "%" G_GSIZE_FORMAT , strlen(body));
                sipmsg_add_header(msg, "Content-Length", len);
        } else {
                sipmsg_add_header(msg, "Content-Length", "0");
        }

        //gchar * mic = purple_krb5_get_mic_for_sipmsg(&krb5_auth, msg);
        //gchar * mic = "MICTODO";

        g_string_append_printf(outstr, "SIP/2.0 %d %s\r\n", code, text);
        while (tmp) {
                name = ((struct siphdrelement*) (tmp->data))->name;
                value = ((struct siphdrelement*) (tmp->data))->value;

                g_string_append_printf(outstr, "%s: %s\r\n", name, value);
                tmp = g_slist_next(tmp);
        }
        g_string_append_printf(outstr, "\r\n%s", body ? body : "");
        sendout_pkt(gc, outstr->str);
        g_string_free(outstr, TRUE);
}

static void transactions_remove(struct sipe_account_data *sip, struct transaction *trans)
{
        if (trans->msg) sipmsg_free(trans->msg);
        sip->transactions = g_slist_remove(sip->transactions, trans);
        g_free(trans);
}

static void transactions_add_buf(struct sipe_account_data *sip, const struct sipmsg *msg, void *callback)
{
        struct transaction *trans = g_new0(struct transaction, 1);
        trans->time = time(NULL);
        trans->msg = msg;
        trans->cseq = sipmsg_find_header(trans->msg, "CSeq");
        trans->callback = callback;
        sip->transactions = g_slist_append(sip->transactions, trans);
}

static struct transaction *transactions_find(struct sipe_account_data *sip, struct sipmsg *msg)
{
        struct transaction *trans;
        GSList *transactions = sip->transactions;
        gchar *cseq = sipmsg_find_header(msg, "CSeq");

        while (transactions) {
                trans = transactions->data;
                if (!strcmp(trans->cseq, cseq)) {
                        return trans;
                }
                transactions = transactions->next;
        }

        return NULL;
}

static void send_sip_request(PurpleConnection *gc, const gchar *method,
                const gchar *url, const gchar *to, const gchar *addheaders,
                const gchar *body, struct sip_dialog *dialog, TransCallback tc)
{
        struct sipe_account_data *sip = gc->proto_data;
        char *callid = dialog ? g_strdup(dialog->callid) : gencallid();
        const char *addh = "";
        gchar *branch = genbranch();
        gchar *tag = NULL;
        char *buf;
        struct sipmsg *msg;
        gchar *ptmp;

        if (!strcmp(method, "REGISTER")) {
                if (sip->regcallid) {
                        g_free(callid);
                        callid = g_strdup(sip->regcallid);
                }
                else sip->regcallid = g_strdup(callid);
        }

        if (addheaders) addh = addheaders;


        if (!dialog)
                tag = gentag();

        buf = g_strdup_printf("%s %s SIP/2.0\r\n"
                        "Via: SIP/2.0/%s %s:%d;branch=%s\r\n"
                        /* epid Identifies a unique endpoint for the user. Used by
                         * the server to determine the correct SA to use for
                         * signing an outgoing response.
                         * TODO: generate a random epid
                         * */
                        "From: <sip:%s>;tag=%s;epid=1234567890\r\n"
                        "To: <%s>%s%s\r\n"
                        "Max-Forwards: 70\r\n"
                        "CSeq: %d %s\r\n"
                        "User-Agent: Purple/" VERSION "\r\n"
                        "Call-ID: %s\r\n"
                        "%s"
                        "Content-Length: %" G_GSIZE_FORMAT "\r\n\r\n%s",
                        method,
                        url,
                        sip->use_ssl ? "TLS" : sip->udp ? "UDP" : "TCP",
                        purple_network_get_my_ip(-1),
                        sip->listenport,
                        branch,
                        sip->username,
                        dialog ? dialog->ourtag : tag,
                        to,
                        dialog ? ";tag=" : "",
                        dialog ? dialog->theirtag : "",
                        ++sip->cseq,
                        method,
                        callid,
                        addh,
                        strlen(body),
                        body);


        //printf ("parsing msg buf:\n%s\n\n", buf);
        msg = sipmsg_parse_msg(buf);

        g_free(buf);
        g_free(tag);
        g_free(branch);
        g_free(callid);

        if (purple_ntlm_authorized()) {
                struct sipmsg_breakdown msgbd;
                msgbd.msg = msg;
                sipmsg_breakdown_parse(&msgbd, sip->registrar.realm, sip->registrar.target);
                gchar * signature_input_str = sipmsg_breakdown_get_string(&msgbd);

                printf ("Have signature_input_str: %s\n", signature_input_str);
                if (signature_input_str != NULL) {
                        msg->signature = purple_ntlm_signature_make (signature_input_str, 0, NULL);
                }
                msg->signature = NULL;

                g_free(signature_input_str);
                sipmsg_breakdown_free(&msgbd);
        } else {
                printf ("registrar ntlm_key is null.  proxies? %i\n", sip->proxy.ntlm_key == NULL);
        }

        if (sip->registrar.type && !strcmp(method, "REGISTER")) {
                buf = auth_header_without_newline(sip, &sip->registrar, msg, FALSE);
                printf("1.for sig %s got auth buf %s\n", msg->signature, buf);
                if (!purple_account_get_bool(sip->account, "krb5", FALSE)) {
                        sipmsg_add_header(msg, "Authorization", buf);
                } else {
                        sipmsg_add_header_pos(msg, "Proxy-Authorization", buf, 5);
                        //sipmsg_add_header_pos(msg, "Authorization", buf, 5);
                }
                g_free(buf);
        } else if (!strcmp(method,"SUBSCRIBE") || !strcmp(method,"SERVICE") || !strcmp(method,"MESSAGE") || !strcmp(method,"INVITE") || !strcmp(method,"NOTIFY")) {
                sip->registrar.nc=3;
                sip->registrar.type=2;
                
                buf = auth_header_without_newline(sip, &sip->registrar, msg, FALSE);
                printf("2.for sig %s got auth buf %s\n", msg->signature, buf);
                //buf = auth_header(sip, &sip->proxy, msg, FALSE);
                sipmsg_add_header_pos(msg, "Proxy-Authorization", buf, 5);
                //sipmsg_add_header(msg, "Authorization", buf);
                g_free(buf);
        }


        buf = sipmsg_to_string (msg);

        /* add to ongoing transactions */

        transactions_add_buf(sip, msg, tc);

        sendout_pkt(gc, buf);
}

static char *get_contact_register(struct sipe_account_data  *sip)
{
        return g_strdup_printf("<sip:%s:%d;transport=%s>;methods=\"INVITE, MESSAGE, INFO, SUBSCRIBE, BYE, CANCEL, NOTIFY, ACK, BENOTIFY\";proxy=replace", purple_network_get_my_ip(-1), sip->listenport,  sip->use_ssl ? "tls" : sip->udp ? "udp" : "tcp");
}

static char *get_contact(struct sipe_account_data  *sip)
{
        //return g_strdup_printf("<sip:%s@%s:%d;maddr=%s;transport=%s>;proxy=replace", sip->username, sip->sipdomain, sip->listenport, sipe_network_get_local_system_ip() , sip->udp ? "udp" : "tcp");
        return g_strdup_printf("<sip:%s:%d;maddr=%s;transport=%s>;proxy=replace", sip->username, sip->listenport, purple_network_get_my_ip(-1), sip->use_ssl ? "tls" : sip->udp ? "udp" : "tcp"); 
}

static void do_register_exp(struct sipe_account_data *sip, int expire)
{
        char *uri = g_strdup_printf("sip:%s", sip->sipdomain);
        char *to = g_strdup_printf("sip:%s", sip->username);
        char *contact = get_contact_register(sip);
        //char *hdr = g_strdup_printf("Contact: %s\r\nExpires: %d\r\n", contact, expire);
       // char *hdr = g_strdup_printf("Contact: %s\r\nEvent: registration\r\nAllow-Events: presence\r\nms-keep-alive: UAC;hop-hop=yes\r\nExpires: %d\r\n", contact,expire);
        //char *hdr = g_strdup_printf("Contact: %s\r\nSupported: com.microsoft.msrtc.presence, adhoclist\r\nms-keep-alive: UAC;hop-hop=yes\r\nEvent: registration\r\nAllow-Events: presence\r\n", contact);
        char *hdr = g_strdup_printf("Contact: %s\r\nEvent: registration\r\nAllow-Events: presence\r\nms-keep-alive: UAC;hop-hop=yes\r\nExpires: %d\r\n", contact,expire);
        g_free(contact);

        sip->registerstatus = 1;

        if (expire) {
                sip->reregister = time(NULL) + expire - 50;
        } else {
                sip->reregister = time(NULL) + 600;
        }

        send_sip_request(sip->gc, "REGISTER", uri, to, hdr, "", NULL,
                process_register_response);

        g_free(hdr);
        g_free(uri);
        g_free(to);
}

static void do_register(struct sipe_account_data *sip)
{
        do_register_exp(sip, sip->registerexpire);
}

static gchar *parse_from(const gchar *hdr)
{
        gchar *from;
        const gchar *tmp, *tmp2 = hdr;

        if (!hdr) return NULL;
        purple_debug_info("sipe", "parsing address out of %s\n", hdr);
        tmp = strchr(hdr, '<');

        /* i hate the different SIP UA behaviours... */
        if (tmp) { /* sip address in <...> */
                tmp2 = tmp + 1;
                tmp = strchr(tmp2, '>');
                if (tmp) {
                        from = g_strndup(tmp2, tmp - tmp2);
                } else {
                        purple_debug_info("sipe", "found < without > in From\n");
                        return NULL;
                }
        } else {
                tmp = strchr(tmp2, ';');
                if (tmp) {
                        from = g_strndup(tmp2, tmp - tmp2);
                } else {
                        from = g_strdup(tmp2);
                }
        }
        purple_debug_info("sipe", "got %s\n", from);
        return from;
}

static gboolean process_subscribe_response(struct sipe_account_data *sip, struct sipmsg *msg, struct transaction *tc)
{
        gchar *to;

        if (msg->response == 200 || msg->response == 202) {
                return TRUE;
        }

        to = parse_from(sipmsg_find_header(tc->msg, "To")); /* cant be NULL since it is our own msg */

        /* we can not subscribe -> user is offline (TODO unknown status?) */

        purple_prpl_got_user_status(sip->account, to, "offline", NULL);
        g_free(to);
        return TRUE;
}

static void sipe_subscribe_to_name(struct sipe_account_data *sip, const char * buddy_name)
{
        gchar *to = strstr(buddy_name, "sip:") ? g_strdup(buddy_name) : g_strdup_printf("sip:%s", buddy_name);
        gchar *tmp = get_contact(sip);
        gchar *contact = g_strdup_printf(
                "Accept: application/pidf+xml, application/xpidf+xml\r\n"
                "Event: presence\r\n"
                "Contact: %s\r\n", tmp);
        g_free(tmp);

        /* subscribe to buddy presence
         * we dont need to know the status so we do not need a callback */

        send_sip_request(sip->gc, "SUBSCRIBE", to, to, contact, "", NULL,
                process_subscribe_response);

        g_free(to);
        g_free(contact);
}

static void sipe_subscribe(struct sipe_account_data *sip, struct sipe_buddy *buddy)
{
        sipe_subscribe_to_name(sip, buddy->name);

        /* resubscribe before subscription expires */
        /* add some jitter */
        buddy->resubscribe = time(NULL)+1140+(rand()%50);
}

static gboolean sipe_add_lcs_contacts(struct sipe_account_data *sip, struct sipmsg *msg, struct transaction *tc)
{
        gchar *tmp;
        xmlnode *item, *group, *isc;
        const char *name_group, *group_id;
        PurpleBuddy *b;
        PurpleGroup *g = NULL;
        gchar **parts;
        gchar *apn;
        int ng = 0, i;
        struct sipe_buddy *bs;
        struct sipe_group *gr;
        int len = msg->bodylen;

        // Reserved to max 10 groups. TODO be dynamic
        gr = g_new0(struct sipe_group, 10);

        tmp = sipmsg_find_header(msg, "Event");
        if (tmp && !strncmp(tmp, "vnd-microsoft-roaming-contacts", 30)) {
                purple_debug_info("sipe", "sipe_add_lcs_contacts->%s-%d\n", msg->body, len);
                /*Convert the contact from XML to Purple Buddies*/
                isc = xmlnode_from_str(msg->body, len);

                /* TODO Find for all groups */
                for (group = xmlnode_get_child(isc, "group"); group; group = xmlnode_get_next_twin(group)) {
                        name_group = xmlnode_get_attrib(group, "name");
                        group_id = xmlnode_get_attrib(group, "id");

                        if (!strncmp(name_group, "~", 1)){
                           name_group=g_strdup("General");
                        }

                        gr[ng].name_group = g_strdup(name_group);
                        gr[ng].id = g_strdup(group_id); 
                        purple_debug_info("sipe", "name_group->%s\n", name_group);
                        g = purple_find_group(name_group);

                        if (!g) {
                                g = purple_group_new(name_group);
                                purple_blist_add_group(g, NULL);
                        }

                        if (!g) {
                           g = purple_find_group("General");
                                if (!g) {
                                        g = purple_group_new("General");
                                        purple_blist_add_group(g, NULL);
                                }
                        }

                        gr[ng].g = g;
                        ng++;
                }

                for (i = 0; i < ng;i++) {
                    purple_debug_info("sipe", "id->%s\n", gr[i].id);
                    purple_debug_info("sipe", "id->%s\n", gr[i].name_group); 
                } 
                 
                for (item = xmlnode_get_child(isc, "contact"); item; item = xmlnode_get_next_twin(item)) {
                        const char *uri, *name, *groups;
                        char *buddy_name;
                        i = 0; 
                        uri = xmlnode_get_attrib(item, "uri");
                        name = xmlnode_get_attrib(item, "name");
                        groups = xmlnode_get_attrib(item, "groups");
                        parts = g_strsplit(groups, " ", 0); 
                        purple_debug_info("sipe", "URI->%s,Groups->%s\n", uri, groups);
                        if (parts[i]!=NULL){
                                while (parts[i]) {
                                        purple_debug_info("sipe", "Groups->parts[i] %s\n", parts[i]);
                                        if (!strcmp(gr[i].id,parts[i])){
                                                purple_debug_info("sipe", "Found Groups->gr[i].id(%s),gr[i].name_group (%s)\n",gr[i].id,gr[i].name_group);

                                                buddy_name = g_strdup_printf("sip:%s", uri);

                                                //b = purple_find_buddy(sip->account, buddy_name); 
                                                b = purple_find_buddy_in_group(sip->account, buddy_name, gr[i].g);
                                                if (!b){
                                                        b = purple_buddy_new(sip->account, buddy_name, uri);
                                                }
                                                g_free(buddy_name);

                                                //sipe_add_buddy(sip->gc, b , gr[i].g);  
                                                purple_blist_add_buddy(b, NULL, gr[i].g, NULL);
                                                purple_blist_alias_buddy(b, uri);
                                                bs = g_new0(struct sipe_buddy, 1);
                                                bs->name = g_strdup(b->name);
                                                g_hash_table_insert(sip->buddies, bs->name, bs);
                                        }
                                        i++;
                                }
                        }
                }

                xmlnode_free(isc); 
        }
        return 0;
}

static void sipe_subscribe_buddylist(struct sipe_account_data *sip)
{
        gchar *contact = "Event: vnd-microsoft-roaming-contacts\r\nAccept: application/vnd-microsoft-roaming-contacts+xml\r\nSupported: com.microsoft.autoextend\r\nSupported: ms-benotify\r\nProxy-Require: ms-benotify\r\nSupported: ms-piggyback-first-notify\r\n";
        gchar *to;
        gchar *tmp;
        //to = g_strdup_printf("sip:%s@%s", sip->username, sip->sipdomain);
        to = g_strdup_printf("sip:%s", sip->username); 

        tmp = get_contact(sip);
        contact = g_strdup_printf("%sContact: %s\r\n", contact, tmp);
        g_free(tmp);
        send_sip_request(sip->gc, "SUBSCRIBE", to, to, contact, "", NULL, sipe_add_lcs_contacts);
        g_free(to);
        g_free(contact);
}

static void sipe_invite(struct sipe_account_data *sip, const char *name)
{
        gchar *hdr;
        gchar *to;
        gchar *contact;
        gchar *body;

        if (strstr(name, "sip:")) {
                to = g_strdup(name);
        } else {
                to = g_strdup_printf("sip:%s", name);
        }

        contact = get_contact(sip);
        hdr = g_strdup_printf(
                "Contact: %s\r\n"
                "Supported: com.microsoft.rtc-multiparty\r\n"
                "Roster-Manager:sip:%s\r\n"
                "Ms-Conversation-ID: AckwibOFOjjDdVR6S5e0xywMj6Kaww==\r\n" //temp
                "ms-text-format: text/plain; charset=UTF-8;msgr=WAAtAE0ATQBTAC0ASQBNAC0ARgBvAHIAbQBhAHQAOgAgAEYATgA9AE0AUwAlADIAMABTAGgAZQBsAGwAJQAyADAARABsAGcAJQAyADAAMgA7ACAARQBGAD0AOwAgAEMATwA9ADAAOwAgAEMAUwA9ADAAOwAgAFAARgA9ADAACgANAAoADQA; \r\n" //temp
                "Supported: ms-delayed-accept\r\n"
                "Supported: ms-renders-isf\r\n"
                "Supported: ms-renders-gif\r\n"
                "Supported: ms-renders-mime-alternative\r\n"
                "EndPoints: <sip:%s>, <%s>\r\n"
                "Content-Type: application/sdp\r\n",
                contact, sip->username, sip->username, to);

        body = g_strdup_printf(
                "v=0\r\n"
                "o=- 0 0 IN IP4 %s\r\n"
                "s=session\r\n"
                "c=IN IP4 %s\r\n"
                "t=0 0\r\n"
                "m=message %d sip null\r\n"
                "a=accept-types:text/plain text/html image/gif multipart/alternative application/im-iscomposing+xml",
                purple_network_get_my_ip(-1), purple_network_get_my_ip(-1), 5061);

        send_sip_request(sip->gc, "INVITE", to, to, hdr, body, NULL, NULL);

        g_free(to);
        g_free(body);
        g_free(hdr);
        g_free(contact);
}

static void sipe_buddy_resub(char *name, struct sipe_buddy *buddy, struct sipe_account_data *sip)
{
        time_t curtime = time(NULL);
        if (buddy->resubscribe < curtime) {
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "sipe_buddy_resub %s\n", name);
                sipe_subscribe(sip, buddy);
        }
}

static gboolean resend_timeout(struct sipe_account_data *sip)
{
        GSList *tmp = sip->transactions;
        time_t currtime = time(NULL);
        while (tmp) {
                struct transaction *trans = tmp->data;
                tmp = tmp->next;
                purple_debug_info("sipe", "have open transaction age: %d\n", currtime- trans->time);
                if ((currtime - trans->time > 5) && trans->retries >= 1) {
                        /* TODO 408 */
                } else {
                        if ((currtime - trans->time > 2) && trans->retries == 0) {
                                trans->retries++;
                                sendout_sipmsg(sip, trans->msg);
                        }
                }
        }
        return TRUE;
}

static gboolean subscribe_timeout(struct sipe_account_data *sip)
{
        GSList *tmp;
        time_t curtime = time(NULL);
        /* register again if first registration expires */
        if (sip->reregister < curtime) {
                do_register(sip);
        }
        /* check for every subscription if we need to resubscribe */
        //Fixxxer we need resub?
        g_hash_table_foreach(sip->buddies, (GHFunc)sipe_buddy_resub, (gpointer)sip);

        /* remove a timed out suscriber */

        tmp = sip->watcher;
        while (tmp) {
                struct sipe_watcher *watcher = tmp->data;
                if (watcher->expire < curtime) {
                        watcher_remove(sip, watcher->name);
                        tmp = sip->watcher;
                }
                if (tmp) tmp = tmp->next;
        }

        return TRUE;
}

static void sipe_send_message(struct sipe_account_data *sip, const char *to, const char *msg, const char *type)
{
        gchar *hdr;
        gchar *fullto;
        gchar *tmp;
        if (strncmp("sip:", to, 4)) {
                fullto = g_strdup_printf("sip:%s", to);
        } else {
                fullto = g_strdup(to);
        }
        if (type) {
                hdr = g_strdup_printf("Content-Type: %s\r\n", type);
        } else {
                hdr = g_strdup("Content-Type: text/plain; charset=UTF-8\r\n");
        }
        tmp = get_contact(sip);
        hdr = g_strdup_printf("Contact: %s\r\n%s", tmp, hdr);
        g_free(tmp);

        send_sip_request(sip->gc, "MESSAGE", fullto, fullto, hdr, msg, NULL, NULL);
        g_free(hdr);
        g_free(fullto);
}

static int sipe_im_send(PurpleConnection *gc, const char *who, const char *what, PurpleMessageFlags flags)
{
        struct sipe_account_data *sip = gc->proto_data;
        char *to = g_strdup(who);
        char *text = purple_unescape_html(what);
        //sipe_send_message(sip, to, text, NULL);
        //sipe_invite(sip, to);
        purple_debug_info("sipe", "sending IMs not implemented\n");
        g_free(to);
        g_free(text);
        return 1;
}

static void process_incoming_message(struct sipe_account_data *sip, struct sipmsg *msg)
{
        gchar *from;
        gchar *contenttype;
        gboolean found = FALSE;

        from = parse_from(sipmsg_find_header(msg, "From"));

        if (!from) return;

        purple_debug_info("sipe", "got message from %s: %s\n", from, msg->body);

        contenttype = sipmsg_find_header(msg, "Content-Type");
        if (!contenttype || !strncmp(contenttype, "text/plain", 10) || !strncmp(contenttype, "text/html", 9)) {
                serv_got_im(sip->gc, from, msg->body, 0, time(NULL));
                send_sip_response(sip->gc, msg, 200, "OK", NULL);
                found = TRUE;
        }
        if (!strncmp(contenttype, "application/im-iscomposing+xml", 30)) {
                xmlnode *isc = xmlnode_from_str(msg->body, msg->bodylen);
                xmlnode *state;
                gchar *statedata;

                if (!isc) {
                        purple_debug_info("sipe", "process_incoming_message: can not parse iscomposing\n");
                        return;
                }

                state = xmlnode_get_child(isc, "state");

                if (!state) {
                        purple_debug_info("sipe", "process_incoming_message: no state found\n");
                        xmlnode_free(isc);
                        return;
                }

                statedata = xmlnode_get_data(state);
                if (statedata) {
                        if (strstr(statedata, "active")) serv_got_typing(sip->gc, from, 0, PURPLE_TYPING);
                        else serv_got_typing_stopped(sip->gc, from);

                        g_free(statedata);
                }
                xmlnode_free(isc);
                send_sip_response(sip->gc, msg, 200, "OK", NULL);
                found = TRUE;
        }
        if (!found) {
                purple_debug_info("sipe", "got unknown mime-type");
                send_sip_response(sip->gc, msg, 415, "Unsupported media type", NULL);
        }
        g_free(from);
}

static void process_incoming_invite(struct sipe_account_data *sip, struct sipmsg *msg)
{
        gchar *contact;
        contact = get_contact(sip);
        sipmsg_remove_header(msg, "Contact");
        sipmsg_add_header(msg, "Contact", contact);

        //sipmsg_remove_header(msg, "User-Agent");
        //sipmsg_add_header_pos(msg, "User-Agent", g_strdup_printf("Purple/" VERSION), 6);

        send_sip_response(sip->gc, msg, 200, "OK", g_strdup_printf(
                "v=0\r\n"
                "o=- 0 0 IN IP4 %s\r\n"
                "s=session\r\n"
                "c=IN IP4 %s\r\n"
                "t=0 0\r\n"
                "m=message %d sip sip:%s\r\n"
                "a=accept-types:text/plain text/html image/gif multipart/alternative application/im-iscomposing+xml",
                purple_network_get_my_ip(-1), purple_network_get_my_ip(-1),
                //sip->realport, sip->username
                5061, sip->username));

        g_free(contact);
}

gboolean process_register_response(struct sipe_account_data *sip, struct sipmsg *msg, struct transaction *tc)
{
        gchar *tmp, krb5_token;
        const gchar *expires_header;
        int expires;

        expires_header = sipmsg_find_header(msg, "Expires");
        expires = expires_header != NULL ? strtol(expires_header, NULL, 10) : 0;
        purple_debug_info("sipe", "got response to REGISTER; expires = %d\n", expires);

        switch (msg->response) {
                case 200:
                        if (expires == 0) {
                                sip->registerstatus = 0;
                        } else {
                                sip->registerstatus = 3;
                                purple_connection_set_state(sip->gc, PURPLE_CONNECTED);

                                /* tell everybody we're online */
                                send_publish (sip);

                                /* get buddies from blist */
                                sipe_get_buddies(sip->gc);
                                subscribe_timeout(sip);

                                //sipe_subscribe_to_name(sip, sip->username);

                                tmp = sipmsg_find_header(msg, "Allow-Events");
                                if (tmp && strstr(tmp, "vnd-microsoft-provisioning")){
                                        sipe_subscribe_buddylist(sip);
                                }
                                
                                // Should we remove the transaction here?
                                purple_debug(PURPLE_DEBUG_MISC, "sipe", "process_register_response - got 200, removing CSeq: %d\r\n", sip->cseq);
                                //transactions_remove(sip, tc);
                        }
                        break;
                case 401:
                        if (sip->registerstatus != 2) {
                                purple_debug_info("sipe", "REGISTER retries %d\n", sip->registrar.retries);
                                if (sip->registrar.retries > 3) {
                                        sip->gc->wants_to_die = TRUE;
                                        purple_connection_error(sip->gc, _("Wrong Password"));
                                        return TRUE;
                                }
                                if (!purple_account_get_bool(sip->account, "krb5", FALSE)) {
                                        tmp = sipmsg_find_auth_header(msg, "NTLM");
                                } else {
                                        tmp = sipmsg_find_auth_header(msg, "Kerberos");
                                }
                                purple_debug(PURPLE_DEBUG_MISC, "sipe", "process_register_response - Auth header: %s\r\n", tmp);
                                fill_auth(sip, tmp, &sip->registrar);
                                sip->registerstatus = 2;
                                if (sip->account->disconnecting) {
                                        do_register_exp(sip, 0);
                                } else {
                                        do_register(sip);
                                }
                        }
                        break;
                }
        return TRUE;
}

static void process_incoming_notify(struct sipe_account_data *sip, struct sipmsg *msg)
{
        gchar *from;
        gchar *fromhdr;
        gchar *tmp2;
        xmlnode *pidf;
        xmlnode *basicstatus = NULL, *tuple, *status;
        gboolean isonline = FALSE;

        fromhdr = sipmsg_find_header(msg, "From");
        from = parse_from(fromhdr);
        if (!from) return;

        pidf = xmlnode_from_str(msg->body, msg->bodylen);

        if (!pidf) {
                purple_debug_info("sipe", "process_incoming_notify: no parseable pidf\n");
                return;
        }

        purple_debug_info("sipe", "process_incoming_notify: body(%s)\n",msg->body);

        if ((tuple = xmlnode_get_child(pidf, "tuple")))
                if ((status = xmlnode_get_child(tuple, "status")))
                        basicstatus = xmlnode_get_child(status, "basic");

        if (!basicstatus) {
                purple_debug_info("sipe", "process_incoming_notify: no basic found\n");
                xmlnode_free(pidf);
                return;
        }

        tmp2 = xmlnode_get_data(basicstatus);

        purple_debug_info("sipe", "process_incoming_notify: basic-status(%s)\n",tmp2);


        if (!tmp2) {
                purple_debug_info("sipe", "process_incoming_notify: no basic data found\n");
                xmlnode_free(pidf);
                return;
        }

        if (strstr(tmp2, "open")) {
                isonline = TRUE;
        }

        g_free(tmp2);

        if (isonline) purple_prpl_got_user_status(sip->account, from, "available", NULL);
        else purple_prpl_got_user_status(sip->account, from, "offline", NULL);

        xmlnode_free(pidf);

        g_free(from);
        send_sip_response(sip->gc, msg, 200, "OK", NULL);
}


static gchar *find_tag(const gchar *hdr)
{
        return sipmsg_find_part_of_header (hdr, ";tag=", ";", NULL);
}

static gchar* gen_xpidf(struct sipe_account_data *sip)
{
        gchar *doc = g_strdup_printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n"
                        "<presence>\r\n"
                        "<presentity uri=\"sip:%s;method=SUBSCRIBE\"/>\r\n"
                        "<display name=\"sip:%s\"/>\r\n"
                        "<atom id=\"1234\">\r\n"
                        "<address uri=\"sip:%s\">\r\n"
                        "<status status=\"%s\"/>\r\n"
                        "</address>\r\n"
                        "</atom>\r\n"
                        "</presence>\r\n",
                        sip->username,
                        sip->username,
                        sip->username,
                        sip->status);
        return doc;
}



static gchar* gen_pidf(struct sipe_account_data *sip)
{
         gchar *doc = g_strdup_printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n"
                        "<presence xmlns=\"urn:ietf:params:xml:ns:pidf\" xmlns:ep=\"urn:ietf:params:xml:ns:pidf:status:rpid-status\" xmlns:ci=\"urn:ietf:params:xml:ns:pidf:cipid\" entity=\"sip:%s\">\r\n"
                        "<tuple id=\"0\">\r\n"
                        "<status>\r\n"
                        "<basic>open</basic>\r\n"
                        "<ep:activities>\r\n"
                        " <ep:activity>%s</ep:activity>\r\n"
                        "</ep:activities>"
                        "</status>\r\n"
                        "</tuple>\r\n" 
                        "<ci:display-name>%s</ci:display-name>\r\n"
                        "</presence>",
                        sip->username,
                        sip->status,
                        sip->username);
        return doc;
}

static void send_notify(struct sipe_account_data *sip, struct sipe_watcher *watcher)
{
        gchar *doc = watcher->needsxpidf ? gen_xpidf(sip) : gen_pidf(sip);
        gchar *hdr = watcher->needsxpidf ? "Event: presence\r\nContent-Type: application/xpidf+xml\r\n" : "Event: presence\r\nContent-Type: application/pidf+xml\r\n";
        send_sip_request(sip->gc, "NOTIFY", watcher->name, watcher->name, hdr, doc, &watcher->dialog, NULL);
        g_free(doc);
}

static gboolean process_service_response(struct sipe_account_data *sip, struct sipmsg *msg, struct transaction *tc)
{
        if (msg->response != 200 && msg->response != 408) {
                /* never send again */
                sip->republish = -1;
        }
        return TRUE;
}

static void send_publish(struct sipe_account_data *sip)
{
        gchar *uri = g_strdup_printf("sip:%s", sip->username);
        gchar *doc = g_strdup_printf(
                "<publish xmlns=\"http://schemas.microsoft.com/2006/09/sip/rich-presence\"><publications uri=\"%s\"><publication categoryName=\"device\" instance=\"1617359818\" container=\"2\" version=\"0\" expireType=\"endpoint\"><device xmlns=\"http://schemas.microsoft.com/2006/09/sip/device\" endpointId=\"BB44F8D5-1540-547D-9ECE-6486D33DC804\"><capabilities preferred=\"false\" uri=\"%s\"><text capture=\"true\" render=\"true\" publish=\"false\"/><gifInk capture=\"false\" render=\"true\" publish=\"false\"/><isfInk capture=\"false\" render=\"true\" publish=\"false\"/></capabilities><timezone>%s</timezone><machineName>%s</machineName></device></publication><publication categoryName=\"state\" instance=\"906391356\" container=\"2\" version=\"0\" expireType=\"endpoint\"><state xmlns=\"http://schemas.microsoft.com/2006/09/sip/state\" manual=\"false\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:type=\"machineState\"><availability>3500</availability><endpointLocation></endpointLocation></state></publication><publication categoryName=\"state\" instance=\"906391356\" container=\"3\" version=\"0\" expireType=\"endpoint\"><state xmlns=\"http://schemas.microsoft.com/2006/09/sip/state\" manual=\"false\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:type=\"machineState\"><availability>3500</availability><endpointLocation></endpointLocation></state></publication></publications></publish>",
                uri, uri,
                "00:00:00-05:00", // TODO timezone
                "PC" // TODO machine name
        );

        gchar *tmp = get_contact(sip);
        gchar *hdr = g_strdup_printf("Contact: %s\r\nContent-Type: application/msrtc-category-publish+xml\r\n", tmp);
        g_free(tmp); 

        send_sip_request(sip->gc, "SERVICE", uri, uri, hdr, doc, NULL, process_service_response);
        //sip->republish = time(NULL) + 500;

        g_free(hdr);
        g_free(uri);
        g_free(doc);
}

static void send_service(struct sipe_account_data *sip)
{
        //gchar *uri = g_strdup_printf("sip:%s@%s", sip->username, sip->sipdomain);
        gchar *uri = g_strdup_printf("sip:%s", sip->username);
        //gchar *doc = gen_pidf(sip);

        gchar *doc = gen_pidf(sip);
        gchar *hdr = g_strdup("Event: presence\r\nContent-Type: application/pidf+xml\r\n");

        //gchar *hdr = g_strdup("Content-Type: application/SOAP+xml\r\n");
        gchar *tmp = get_contact(sip);
        hdr = g_strdup_printf("Contact: %s\r\n%s", tmp, hdr);
        g_free(tmp); 
        send_sip_request(sip->gc, "SERVICE", uri, uri,
                hdr,
                doc, NULL, process_service_response);
        sip->republish = time(NULL) + 500;
        g_free(hdr);
        g_free(uri);
        g_free(doc);
}

static void process_incoming_subscribe(struct sipe_account_data *sip, struct sipmsg *msg)
{
        const char *from_hdr = sipmsg_find_header(msg, "From");
        gchar *from = parse_from(from_hdr);
        gchar *theirtag = find_tag(from_hdr);
        gchar *ourtag = find_tag(sipmsg_find_header(msg, "To"));
        gboolean tagadded = FALSE;
        gchar *callid = sipmsg_find_header(msg, "Call-ID");
        gchar *expire = sipmsg_find_header(msg, "Expire");
    //    gchar *ms-received-port =find_received_port(sipmsg_find_header(msg, "Contact"));
        gchar *tmp;
        struct sipe_watcher *watcher = watcher_find(sip, from);
        if (!ourtag) {
                tagadded = TRUE;
                ourtag = gentag();
        }
        if (!watcher) { /* new subscription */
                gchar *acceptheader = sipmsg_find_header(msg, "Accept");
                gboolean needsxpidf = FALSE;
                if (!purple_privacy_check(sip->account, from)) {
                        send_sip_response(sip->gc, msg, 202, "Ok", NULL);
                        goto privend;
                }
                if (acceptheader) {
                        gchar *tmp = acceptheader;
                        gboolean foundpidf = FALSE;
                        gboolean foundxpidf = FALSE;
                        while (tmp && tmp < acceptheader + strlen(acceptheader)) {
                                gchar *tmp2 = strchr(tmp, ',');
                                if (tmp2) *tmp2 = '\0';
                                if (!strcmp("application/pidf+xml", tmp))
                                        foundpidf = TRUE;
                                if (!strcmp("application/xpidf+xml", tmp))
                                        foundxpidf = TRUE;
                                if (tmp2) {
                                        *tmp2 = ',';
                                        tmp = tmp2;
                                        while (*tmp == ' ') tmp++;
                                } else
                                        tmp = 0;
                        }
                        if (!foundpidf && foundxpidf) needsxpidf = TRUE;
                        g_free(acceptheader);
                }
                watcher = watcher_create(sip, from, callid, ourtag, theirtag, needsxpidf);
        }
        if (tagadded) {
                gchar *to = g_strdup_printf("%s;tag=%s", sipmsg_find_header(msg, "To"), ourtag);
                sipmsg_remove_header(msg, "To");
                sipmsg_add_header(msg, "To", to);
                g_free(to);
        }
        if (expire)
                watcher->expire = time(NULL) + strtol(expire, NULL, 10);
        else
                watcher->expire = time(NULL) + 600;
        //Fixxxer
        sipmsg_remove_header(msg, "Contact");
        tmp = get_contact(sip);
        sipmsg_add_header(msg, "Contact", tmp);
        g_free(tmp);
        purple_debug_info("sipe", "got subscribe: name %s ourtag %s theirtag %s callid %s\n", watcher->name, watcher->dialog.ourtag, watcher->dialog.theirtag, watcher->dialog.callid);
        send_sip_response(sip->gc, msg, 200, "Ok", NULL);
        send_notify(sip, watcher);
privend:
        g_free(from);
        g_free(theirtag);
        g_free(ourtag);
        g_free(callid);
        g_free(expire);
}

static void process_input_message(struct sipe_account_data *sip, struct sipmsg *msg)
{
        gboolean found = FALSE;
        purple_debug_info("sipe", "msg->response(%d),msg->method(%s)\n",msg->response,msg->method);
        if (msg->response == 0) { /* request */
                if (!strcmp(msg->method, "MESSAGE")) {
                        process_incoming_message(sip, msg);
                        found = TRUE;
                } else if (!strcmp(msg->method, "NOTIFY")) {
                        purple_debug_info("sipe","send->process_incoming_notify\n");
                        process_incoming_notify(sip, msg);
                        found = TRUE;
                } else if (!strcmp(msg->method, "SUBSCRIBE")) {
                        purple_debug_info("sipe","send->process_incoming_subscribe\n");
                        process_incoming_subscribe(sip, msg);
                        found = TRUE;
                } else if (!strcmp(msg->method, "INVITE")) {
                        purple_debug_info("sipe","not calling unfinished send->process_incoming_invite\n");
                        //process_incoming_invite(sip, msg);
                        found = TRUE;
                } else if (!strcmp(msg->method, "INFO")) {
                        // TODO implement this - keyboard activity
                        found = TRUE;
                } else if (!strcmp(msg->method, "ACK")) {
                        found = TRUE;
                } else {
                        send_sip_response(sip->gc, msg, 501, "Not implemented", NULL);
                }
        } else { /* response */
                struct transaction *trans = transactions_find(sip, msg);
                if (trans) {
                        if (msg->response == 407) {
                                gchar *resend, *auth, *ptmp;

                                if (sip->proxy.retries > 30) return;
                                sip->proxy.retries++;
                                /* do proxy authentication */

                                ptmp = sipmsg_find_header(msg, "Proxy-Authenticate");

                                fill_auth(sip, ptmp, &sip->proxy);
                                auth = auth_header(sip, &sip->proxy, trans->msg, TRUE);
                                sipmsg_remove_header(trans->msg, "Proxy-Authorization");
                                sipmsg_add_header_pos(trans->msg, "Proxy-Authorization", auth, 5);
                                g_free(auth);
                                resend = sipmsg_to_string(trans->msg);
                                /* resend request */
                                sendout_pkt(sip->gc, resend);
                                g_free(resend);
                        } else {
                                if (msg->response == 100) {
                                        /* ignore provisional response */
                                        purple_debug_info("sipe", "got trying response\n");
                                } else {
                                        sip->proxy.retries = 0;
                                        if (!strcmp(trans->msg->method, "REGISTER")) {
                                                if (msg->response == 401) sip->registrar.retries++;
                                                else sip->registrar.retries = 0;
                                                purple_debug_info("sipe", "RE-REGISTER CSeq: %d\r\n", sip->cseq);
                                        } else {
                                                if (msg->response == 401) {
                                                        gchar *resend, *auth, *ptmp;

                                                        if (sip->registrar.retries > 4) return;
                                                        sip->registrar.retries++;

                                                        if (!purple_account_get_bool(sip->account, "krb5", FALSE)) {
                                                                ptmp = sipmsg_find_auth_header(msg, "NTLM");
                                                        } else {
                                                                ptmp = sipmsg_find_auth_header(msg, "Kerberos");
                                                        }

                                                        purple_debug(PURPLE_DEBUG_MISC, "sipe", "process_input_message - Auth header: %s\r\n", ptmp);

                                                        fill_auth(sip, ptmp, &sip->registrar);
                                                        auth = auth_header(sip, &sip->registrar, trans->msg, TRUE);
                                                        sipmsg_remove_header(trans->msg, "Proxy-Authorization");
                                                        sipmsg_add_header(trans->msg, "Proxy-Authorization", auth);
                                                        
                                                        //sipmsg_remove_header(trans->msg, "Authorization");
                                                        //sipmsg_add_header(trans->msg, "Authorization", auth);
                                                        g_free(auth);
                                                        resend = sipmsg_to_string(trans->msg);
                                                        /* resend request */
                                                        sendout_pkt(sip->gc, resend);
                                                        g_free(resend);
                                                }
                                        }
                                        if (trans->callback) {
                                                purple_debug(PURPLE_DEBUG_MISC, "sipe", "process_input_message - we have a transaction callback\r\n");
                                                /* call the callback to process response*/
                                                (trans->callback)(sip, msg, trans);
                                        }
                                        /* Not sure if this is needed or what needs to be done
                                           but transactions seem to be removed prematurely so 
                                           this only removes them if the response is 200 OK */
                                        purple_debug(PURPLE_DEBUG_MISC, "sipe", "process_input_message - removing CSeq %d\r\n", sip->cseq);
                                        transactions_remove(sip, trans);
                                        
                                }
                        }
                        found = TRUE;
                        /* This is done because in an OCS2007 server trace the MS
                         * Communicator client seems to reset the CSeq after an OK */

                        //sip->cseq=1;
                } else {
                        purple_debug(PURPLE_DEBUG_MISC, "sipe", "received response to unknown transaction");
                }
        }
        if (!found) {
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "received a unknown sip message with method %s and response %d\n", msg->method, msg->response);
        }
}

static void process_input(struct sipe_account_data *sip, struct sip_connection *conn)
{
        char *cur;
        char *dummy;
        struct sipmsg *msg;
        int restlen;
        cur = conn->inbuf;

        /* according to the RFC remove CRLF at the beginning */
        while (*cur == '\r' || *cur == '\n') {
                cur++;
        }
        if (cur != conn->inbuf) {
                memmove(conn->inbuf, cur, conn->inbufused - (cur - conn->inbuf));
                conn->inbufused = strlen(conn->inbuf);
        }

        /* Received a full Header? */
        if ((cur = strstr(conn->inbuf, "\r\n\r\n")) != NULL) {
                time_t currtime = time(NULL);
                cur += 2;
                cur[0] = '\0';
                purple_debug_info("sipe", "\n\nreceived - %s\n######\n%s\n#######\n\n", ctime(&currtime), conn->inbuf);
                msg = sipmsg_parse_header(conn->inbuf);
                cur[0] = '\r';
                cur += 2;
                restlen = conn->inbufused - (cur - conn->inbuf);
                if (restlen >= msg->bodylen) {
                        dummy = g_malloc(msg->bodylen + 1);
                        memcpy(dummy, cur, msg->bodylen);
                        dummy[msg->bodylen] = '\0';
                        msg->body = dummy;
                        cur += msg->bodylen;
                        memmove(conn->inbuf, cur, conn->inbuflen - (cur - conn->inbuf));
                        conn->inbufused = strlen(conn->inbuf);
                } else {
                        sipmsg_free(msg);
                        return;
                }

                //gchar * mic = purple_krb5_get_mic_for_sipmsg(&krb5_auth, msg);
                //printf ("\nWe think MIC for incoming should be: %s\n\n", mic);
                //g_free(mic);
                //if (purple_ntlm_authorized()) {
                if (1) {
                        struct sipmsg_breakdown msgbd;
                        msgbd.msg = msg;
                        sipmsg_breakdown_parse(&msgbd, sip->registrar.realm, sip->registrar.target);
                        gchar * signature_input_str = sipmsg_breakdown_get_string(&msgbd);

                        printf ("Have signature_input_str for incoming msg: %s\n", signature_input_str);
                        if (signature_input_str != NULL) {
                                guint64 srand = g_ascii_strtoull (msgbd.rand, NULL, 16);
                                printf ("Have srand = %ld\n", srand);
                                msg->signature = purple_ntlm_signature_make (signature_input_str, srand, sipmsg_find_part_of_header(sipmsg_find_header(msg, "Authentication-Info"), "rspauth=\"", "\"", NULL));
                        }

                        g_free(signature_input_str);
                        sipmsg_breakdown_free(&msgbd);


                } else {
                        printf ("registrar ntlm_key is null.  proxies? %i\n", sip->proxy.ntlm_key == NULL);
                }

                process_input_message(sip, msg);

        } else {
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "received a incomplete sip msg: %s\n", conn->inbuf);
        }
}

static void sipe_udp_process(gpointer data, gint source, PurpleInputCondition con)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip = gc->proto_data;
        struct sipmsg *msg;
        int len;
        time_t currtime;

        static char buffer[65536];
        if ((len = recv(source, buffer, sizeof(buffer) - 1, 0)) > 0) {
                buffer[len] = '\0';
                purple_debug_info("sipe", "\n\nreceived - %s\n######\n%s\n#######\n\n", ctime(&currtime), buffer);
                msg = sipmsg_parse_msg(buffer);
                if (msg) process_input_message(sip, msg);
        }
}

static void sipe_input_cb_ssl(gpointer data, PurpleSslConnection *gsc, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip = gc->proto_data;
        struct sip_connection *conn = NULL;
        int len;
        static char buf[4096];

        /* TODO: It should be possible to make this check unnecessary */
        if (!PURPLE_CONNECTION_IS_VALID(gc)) {
                purple_ssl_close(gsc);
                return;
        }

        conn = connection_find(sip, sip->gsc->fd);
        if (!conn) {
                purple_debug_error("sipe", "Connection not found!\n");
                purple_ssl_close(gsc);
                return;
        }
      

        if (conn->inbuflen < conn->inbufused + SIMPLE_BUF_INC) {
                conn->inbuflen += SIMPLE_BUF_INC;
                conn->inbuf = g_realloc(conn->inbuf, conn->inbuflen);
        }

        len = purple_ssl_read(gsc, conn->inbuf + conn->inbufused, SIMPLE_BUF_INC - 1);

        if (len < 0 && errno == EAGAIN) {
                /* Try again later */
                return;
        } else if (len < 0) {
                purple_debug_info("sipe", "sipe_input_cb_ssl: read error\n");
                connection_remove(sip, sip->gsc->fd); 
                if (sip->fd == gsc->fd) sip->fd = -1;  
                return;
        } else if (len == 0) {
                purple_connection_error(gc, _("Server has disconnected"));
                connection_remove(sip, sip->gsc->fd);
                if (sip->fd == gsc->fd) sip->fd = -1;
                return;
        }

        conn->inbufused += len;
        conn->inbuf[conn->inbufused] = '\0';

        process_input(sip, conn);
  
}

static void sipe_input_cb(gpointer data, gint source, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip = gc->proto_data;
        int len;
        struct sip_connection *conn = connection_find(sip, source);
        if (!conn) {
                purple_debug_error("sipe", "Connection not found!\n");
                return;
        }

        if (conn->inbuflen < conn->inbufused + SIMPLE_BUF_INC) {
                conn->inbuflen += SIMPLE_BUF_INC;
                conn->inbuf = g_realloc(conn->inbuf, conn->inbuflen);
        }

        len = read(source, conn->inbuf + conn->inbufused, SIMPLE_BUF_INC - 1);

        if (len < 0 && errno == EAGAIN)
                return;
        else if (len <= 0) {
                purple_debug_info("sipe", "sipe_input_cb: read error\n");
                connection_remove(sip, source);
                if (sip->fd == source) sip->fd = -1;
                return;
        }

        conn->inbufused += len;
        conn->inbuf[conn->inbufused] = '\0';

        process_input(sip, conn);
}

/* Callback for new connections on incoming TCP port */
static void sipe_newconn_cb(gpointer data, gint source, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip = gc->proto_data;
        struct sip_connection *conn;

        int newfd = accept(source, NULL, NULL);

        conn = connection_create(sip, newfd);

        conn->inputhandler = purple_input_add(newfd, PURPLE_INPUT_READ, sipe_input_cb, gc);
}

static void login_cb(gpointer data, gint source, const gchar *error_message)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip;
        struct sip_connection *conn;

        if (!PURPLE_CONNECTION_IS_VALID(gc))
        {
                if (source >= 0)
                        close(source);
                return;
        }

        if (source < 0) {
                purple_connection_error(gc, _("Could not connect"));
                return;
        }

        sip = gc->proto_data;
        sip->fd = source;

        conn = connection_create(sip, source);

        sip->registertimeout = purple_timeout_add((rand()%100)+10*1000, (GSourceFunc)subscribe_timeout, sip);

        do_register(sip);

        conn->inputhandler = purple_input_add(sip->fd, PURPLE_INPUT_READ, sipe_input_cb, gc);
}

static void login_cb_ssl(gpointer data, PurpleSslConnection *gsc, PurpleInputCondition cond)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip;
        struct sip_connection *conn;

        if (!PURPLE_CONNECTION_IS_VALID(gc))
        {
                purple_ssl_close(gsc);
                return;
        }

        sip = gc->proto_data;
        sip->fd = gsc->fd;
        conn = connection_create(sip, sip->fd);
        sip->listenport = purple_network_get_port_from_fd(sip->fd);
        sip->listenfd = sip->fd;
        sip->registertimeout = purple_timeout_add((rand()%100)+10*1000, (GSourceFunc)subscribe_timeout, sip);

        do_register(sip);

        purple_ssl_input_add(gsc, sipe_input_cb_ssl, gc);
}

static guint sipe_ht_hash_nick(const char *nick)
{
        char *lc = g_utf8_strdown(nick, -1);
        guint bucket = g_str_hash(lc);
        g_free(lc);

        return bucket;
}

static gboolean sipe_ht_equals_nick(const char *nick1, const char *nick2)
{
        return (purple_utf8_strcasecmp(nick1, nick2) == 0);
}

static void sipe_udp_host_resolved_listen_cb(int listenfd, gpointer data)
{
        struct sipe_account_data *sip = (struct sipe_account_data*) data;

        sip->listen_data = NULL;

        if (listenfd == -1) {
                purple_connection_error(sip->gc, _("Could not create listen socket"));
                return;
        }

        sip->fd = listenfd;

        sip->listenport = purple_network_get_port_from_fd(sip->fd);
        sip->listenfd = sip->fd;

        sip->listenpa = purple_input_add(sip->fd, PURPLE_INPUT_READ, sipe_udp_process, sip->gc);

        sip->resendtimeout = purple_timeout_add(2500, (GSourceFunc) resend_timeout, sip);
        sip->registertimeout = purple_timeout_add((rand()%100)+10*1000, (GSourceFunc)subscribe_timeout, sip);
        do_register(sip);
}

static void sipe_udp_host_resolved(GSList *hosts, gpointer data, const char *error_message)
{
        struct sipe_account_data *sip = (struct sipe_account_data*) data;
        int addr_size;

        sip->query_data = NULL;

        if (!hosts || !hosts->data) {
                purple_connection_error(sip->gc, _("Couldn't resolve host"));
                return;
        }

        addr_size = GPOINTER_TO_INT(hosts->data);
        hosts = g_slist_remove(hosts, hosts->data);
        memcpy(&(sip->serveraddr), hosts->data, addr_size);
        g_free(hosts->data);
        hosts = g_slist_remove(hosts, hosts->data);
        while (hosts) {
                hosts = g_slist_remove(hosts, hosts->data);
                g_free(hosts->data);
                hosts = g_slist_remove(hosts, hosts->data);
        }

        /* create socket for incoming connections */
        sip->listen_data = purple_network_listen_range(5060, 5160, SOCK_DGRAM,
                                sipe_udp_host_resolved_listen_cb, sip);
        if (sip->listen_data == NULL) {
                purple_connection_error(sip->gc, _("Could not create listen socket"));
                return;
        }
}

static void sipe_ssl_connect_failure(PurpleSslConnection *gsc, PurpleSslErrorType error, 
                                     gpointer data)
{
        PurpleConnection *gc = data;
        struct sipe_account_data *sip;

        /* If the connection is already disconnected, we don't need to do anything else */
        if (!PURPLE_CONNECTION_IS_VALID(gc))
                return;

        sip = gc->proto_data;
        sip->gsc = NULL;

        switch(error) {
                case PURPLE_SSL_CONNECT_FAILED:
                        purple_connection_error(gc, _("Connection Failed"));
                        break;
                case PURPLE_SSL_HANDSHAKE_FAILED:
                        purple_connection_error(gc, _("SSL Handshake Failed"));
                        break;
        }
}

static void
sipe_tcp_connect_listen_cb(int listenfd, gpointer data)
{
        struct sipe_account_data *sip = (struct sipe_account_data*) data;
        PurpleProxyConnectData *connect_data;

        sip->listen_data = NULL;

        sip->listenfd = listenfd;
        if (sip->listenfd == -1) {
                purple_connection_error(sip->gc, _("Could not create listen socket"));
                return;
        }

        purple_debug_info("sipe", "listenfd: %d\n", sip->listenfd);
        //sip->listenport = purple_network_get_port_from_fd(sip->listenfd);
        sip->listenport = purple_network_get_port_from_fd(sip->listenfd);
        sip->listenpa = purple_input_add(sip->listenfd, PURPLE_INPUT_READ,
                        sipe_newconn_cb, sip->gc);
        purple_debug_info("sipe", "connecting to %s port %d\n",
                        sip->realhostname, sip->realport);
        /* open tcp connection to the server */ 
        connect_data = purple_proxy_connect(sip->gc, sip->account, sip->realhostname,
                        sip->realport, login_cb, sip->gc);
        
        if (connect_data == NULL) {
                purple_connection_error(sip->gc, _("Couldn't create socket"));
        }
}



static void srvresolved(PurpleSrvResponse *resp, int results, gpointer data)
{
        struct sipe_account_data *sip;
        gchar *hostname;
        int port;

        sip = data;
        sip->srv_query_data = NULL;

        port = purple_account_get_int(sip->account, "port", 0);

        /* find the host to connect to */
        if (results) {
                hostname = g_strdup(resp->hostname);
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "srvresolved - SRV hostname: %s\r\n", hostname);
                if (!port)
                        port = resp->port;
                g_free(resp);
        } else {
                if (!purple_account_get_bool(sip->account, "useproxy", FALSE)) {
                        purple_debug(PURPLE_DEBUG_MISC, "sipe", "srvresolved - using sipdomain\r\n");
                        hostname = g_strdup(sip->sipdomain);
                } else {
                        purple_debug(PURPLE_DEBUG_MISC, "sipe", "srvresolved - using specified SIP proxy\r\n");
                        hostname = g_strdup(purple_account_get_string(sip->account, "proxy", sip->sipdomain));
                }
        }

        sip->realhostname = hostname;
        sip->realport = port;
        if (!sip->realport) sip->realport = 5060;

        /* TCP case */
        //if (!sip->udp) {
        //      /* create socket for incoming connections */
        //      sip->listen_data = purple_network_listen_range(5060, 5160, SOCK_STREAM,
        //                              sipe_tcp_connect_listen_cb, sip);
        //      if (sip->listen_data == NULL) {
        //              purple_connection_error(sip->gc, _("Could not create listen socket"));
        //              return;
        //      }
        //} else { /* UDP */
        //      purple_debug_info("sipe", "using udp with server %s and port %d\n", hostname, port);

        //      sip->query_data = purple_dnsquery_a(hostname, port, sipe_udp_host_resolved, sip);
        //      if (sip->query_data == NULL) {
        //              purple_connection_error(sip->gc, _("Could not resolve hostname"));
        //      }
        //}
}

static void sipe_login(PurpleAccount *account)
{
        PurpleConnection *gc;
        struct sipe_account_data *sip;
        gchar **userserver;
        gchar *hosttoconnect;

        const char *username = purple_account_get_username(account);
        gc = purple_account_get_connection(account);

        if (strpbrk(username, " \t\v\r\n") != NULL) {
                gc->wants_to_die = TRUE;
                purple_connection_error(gc, _("SIP Exchange usernames may not contain whitespaces"));
                return;
        }

        if (!purple_account_get_bool(account, "ssl", FALSE)){
           if (!purple_ssl_is_supported())
           {
                gc->wants_to_die = TRUE;
                purple_connection_error(gc,
                        _("SSL support is needed for SSL/TLS support. Please install a supported "
                          "SSL library."));
                return;
           }
        }


        gc->proto_data = sip = g_new0(struct sipe_account_data, 1);
        sip->gc = gc;
        sip->account = account;
        sip->registerexpire = 900;
        sip->udp = purple_account_get_bool(account, "udp", FALSE);
        sip->use_ssl = purple_account_get_bool(account, "ssl", FALSE);

        purple_debug_info("sipe", "sip->use_ssl->%d\n", sip->use_ssl); 
        
        /* TODO: is there a good default grow size? */
        if (!sip->udp)
                sip->txbuf = purple_circ_buffer_new(0);

        userserver = g_strsplit(username, "@", 2);
        purple_connection_set_display_name(gc, userserver[0]);
        sip->username = g_strdup(g_strjoin("@", userserver[0], userserver[1], NULL)); 
        sip->sipdomain = g_strdup(userserver[1]);
        sip->password = g_strdup(purple_connection_get_password(gc));
        g_strfreev(userserver);

        if (sip->use_ssl) {
                // Communicator queries _sipinternaltls._tcp.domain.com and uses that
                // information to connect to the OCS server.
                //
                // XXX FIXME: eventually we should also query for sipexternaltls as well
                //            if Pidgin is not on the local LAN
                //  This doesn't quite work as advertised yet so make sure your have 
                //  your OCS FQDN in the proxy setting in the SIPE account settings
                //
                sip->srv_query_data = purple_srv_resolve("sipinternaltls", "tcp", sip->sipdomain, srvresolved, sip);
        }

        purple_debug(PURPLE_DEBUG_MISC, "sipe", "sipe_login - realhostname: %s\r\n", sip->realhostname);

        sip->buddies = g_hash_table_new((GHashFunc)sipe_ht_hash_nick, (GEqualFunc)sipe_ht_equals_nick);

        purple_connection_update_progress(gc, _("Connecting"), 1, 2);

        /* TODO: Set the status correctly. */
        sip->status = g_strdup("available");

        if (!purple_account_get_bool(account, "useproxy", FALSE)) {
                purple_debug(PURPLE_DEBUG_MISC, "sipe", "sipe_login - checking realhostname again: %s\r\n", sip->realhostname);
                hosttoconnect = g_strdup(sip->sipdomain);
        } else {
                hosttoconnect = g_strdup(purple_account_get_string(account, "proxy", sip->sipdomain));
                 
        }
         /*SSL*/
        purple_debug_info("sipe", "HosttoConnect->%s\n", hosttoconnect);

        if (sip->use_ssl){ 
          sip->gsc = purple_ssl_connect(account,hosttoconnect, purple_account_get_int(account, "port", 5061), login_cb_ssl, sipe_ssl_connect_failure, gc);
        }
        else{
                sip->srv_query_data = purple_srv_resolve("sip",
                        sip->udp ? "udp" : "tcp", hosttoconnect, srvresolved, sip);
        }
        
        g_free(hosttoconnect);
}

static void sipe_close(PurpleConnection *gc)
{
        struct sipe_account_data *sip = gc->proto_data;

        if (sip) {
                /* unregister */
                do_register_exp(sip, 0);
                connection_free_all(sip);

                if (sip->query_data != NULL)
                        purple_dnsquery_destroy(sip->query_data);

                if (sip->srv_query_data != NULL)
                        purple_srv_cancel(sip->srv_query_data);

                if (sip->listen_data != NULL)
                        purple_network_listen_cancel(sip->listen_data);

                g_free(sip->sipdomain);
                g_free(sip->username);
                g_free(sip->password);
                g_free(sip->registrar.nonce);
                g_free(sip->registrar.opaque);
                g_free(sip->registrar.target);
                g_free(sip->registrar.realm);
                g_free(sip->registrar.digest_session_key);
                g_free(sip->proxy.nonce);
                g_free(sip->proxy.opaque);
                g_free(sip->proxy.target);
                g_free(sip->proxy.realm);
                g_free(sip->proxy.digest_session_key);
                if (sip->txbuf)
                        purple_circ_buffer_destroy(sip->txbuf);
                g_free(sip->realhostname);
                if (sip->listenpa) purple_input_remove(sip->listenpa);
                if (sip->tx_handler) purple_input_remove(sip->tx_handler);
                if (sip->resendtimeout) purple_timeout_remove(sip->resendtimeout);
                if (sip->registertimeout) purple_timeout_remove(sip->registertimeout);
        }
        g_free(gc->proto_data);
        gc->proto_data = NULL;
}

/* not needed since privacy is checked for every subscribe */
static void dummy_add_deny(PurpleConnection *gc, const char *name) {
}

static void dummy_permit_deny(PurpleConnection *gc)
{
}

static gboolean sipe_plugin_load(PurplePlugin *plugin)
{
  return TRUE;
}


static gboolean sipe_plugin_unload(PurplePlugin *plugin)
{
    return TRUE;
}


static void sipe_plugin_destroy(PurplePlugin *plugin)
{
}

static PurplePlugin *my_protocol = NULL;

static PurplePluginProtocolInfo prpl_info =
{
        0,
        NULL,                                   /* user_splits */
        NULL,                                   /* protocol_options */
        NO_BUDDY_ICONS,                 /* icon_spec */
        sipe_list_icon,         /* list_icon */
        NULL,                                   /* list_emblems */
        NULL,                                   /* status_text */
        NULL,                                   /* tooltip_text */
        sipe_status_types,      /* away_states */
        NULL,                                   /* blist_node_menu */
        NULL,                                   /* chat_info */
        NULL,                                   /* chat_info_defaults */
        sipe_login,                     /* login */
        sipe_close,                     /* close */
        sipe_im_send,                   /* send_im */
        NULL,                                   /* set_info */
//      sipe_typing,                    /* send_typing */
        NULL,                   /* send_typing */
        NULL,                                   /* get_info */
        sipe_set_status,                /* set_status */
        NULL,                                   /* set_idle */
        NULL,                                   /* change_passwd */
        sipe_add_buddy,         /* add_buddy */
        NULL,                                   /* add_buddies */
        sipe_remove_buddy,      /* remove_buddy */
        NULL,                                   /* remove_buddies */
        dummy_add_deny,                 /* add_permit */
        dummy_add_deny,                 /* add_deny */
        dummy_add_deny,                 /* rem_permit */
        dummy_add_deny,                 /* rem_deny */
        dummy_permit_deny,              /* set_permit_deny */
        NULL,                                   /* join_chat */
        NULL,                                   /* reject_chat */
        NULL,                                   /* get_chat_name */
        NULL,                                   /* chat_invite */
        NULL,                                   /* chat_leave */
        NULL,                                   /* chat_whisper */
        NULL,                                   /* chat_send */
        sipe_keep_alive,                /* keepalive */
        NULL,                                   /* register_user */
        NULL,                                   /* get_cb_info */
        NULL,                                   /* get_cb_away */
        NULL,                                   /* alias_buddy */
        NULL,                                   /* group_buddy */
        NULL,                                   /* rename_group */
        NULL,                                   /* buddy_free */
        NULL,                                   /* convo_closed */
        NULL,                                   /* normalize */
        NULL,                                   /* set_buddy_icon */
        NULL,                                   /* remove_group */
        NULL,                                   /* get_cb_real_name */
        NULL,                                   /* set_chat_topic */
        NULL,                                   /* find_blist_chat */
        NULL,                                   /* roomlist_get_list */
        NULL,                                   /* roomlist_cancel */
        NULL,                                   /* roomlist_expand_category */
        NULL,                                   /* can_receive_file */
        NULL,                                   /* send_file */
        NULL,                                   /* new_xfer */
        NULL,                                   /* offline_message */
        NULL,                                   /* whiteboard_prpl_ops */
        sipe_send_raw,                  /* send_raw */
};


static PurplePluginInfo info = {
        PURPLE_PLUGIN_MAGIC,
        PURPLE_MAJOR_VERSION,
        PURPLE_MINOR_VERSION,
        PURPLE_PLUGIN_PROTOCOL,                           /**< type           */
        NULL,                                             /**< ui_requirement */
        0,                                                /**< flags          */
        NULL,                                             /**< dependencies   */
        PURPLE_PRIORITY_DEFAULT,                          /**< priority       */
        "prpl-sipe",                                      /**< id             */
        "SIPE",                                           /**< name           */
        VERSION,                                          /**< version        */
        N_("SIP/SIMPLE Exchange Protocol Plugin"),        /**  summary        */
        N_("The SIP/SIMPLE Exchange Protocol Plugin"),    /**  description    */
        "Anibal Avelar <avelar@gmail.com>",               /**< author         */
        PURPLE_WEBSITE,                                   /**< homepage       */
        sipe_plugin_load,                                 /**< load           */
        sipe_plugin_unload,                               /**< unload         */
        sipe_plugin_destroy,                              /**< destroy        */
        NULL,                                             /**< ui_info        */
        &prpl_info,                                       /**< extra_info     */
        NULL,
        NULL,
        NULL,
        NULL,
        NULL,
        NULL
};

static void init_plugin(PurplePlugin *plugin)
{
        PurpleAccountUserSplit *split;
        PurpleAccountOption *option;

        purple_plugin_register(plugin);

        //split = purple_account_user_split_new(_("Server"), "", '@');
        //prpl_info.user_splits = g_list_append(prpl_info.user_splits, split);
        option = purple_account_option_bool_new(_("Use proxy"), "useproxy", FALSE);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);
        option = purple_account_option_string_new(_("Proxy Server"), "proxy", "");
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);

        /*option = purple_account_option_bool_new(_("Publish status (note: everyone may watch you)"), "doservice", TRUE);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);*/

        option = purple_account_option_bool_new(_("Use SSL/TLS"), "ssl", FALSE);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options,option);

        option = purple_account_option_bool_new(_("Use UDP"), "udp", FALSE);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);
        
        option = purple_account_option_int_new(_("Connect port"), "port", 5060);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);

        option = purple_account_option_bool_new(_("Use Kerberos"), "krb5", FALSE);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);

        // XXX FIXME: Add code to programmatically determine if a KRB REALM is specified in /etc/krb5.conf
        option = purple_account_option_string_new(_("Kerberos Realm"), "krb5_realm", "");
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);

        /*option = purple_account_option_bool_new(_("Use proxy"), "useproxy", FALSE);
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);
        option = purple_account_option_string_new(_("Proxy"), "proxy", "");
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);*/
        option = purple_account_option_string_new(_("Auth User"), "authuser", "");
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);
        option = purple_account_option_string_new(_("Auth Domain"), "authdomain", "");
        prpl_info.protocol_options = g_list_append(prpl_info.protocol_options, option);
        my_protocol = plugin;

}

/* I had to redefined the function for it load, but works */
gboolean purple_init_plugin(PurplePlugin *plugin){
 plugin->info = &(info); 
 init_plugin((plugin)); 
 sipe_plugin_load((plugin)); 
 return purple_plugin_register(plugin); 
}