src/core/sipe-utils.c

   1 /**
   2  * @file sipe-utils.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2009-2010 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <ctype.h>
  27 #include <time.h>
  28
  29 #include <glib.h>
  30
  31 #include "network.h"
  32
  33 #include "sip-sec.h"
  34 #include "sipe-backend.h"
  35 #include "sipe-utils.h"
  36 #include "uuid.h"
  37 #include "sipe.h"
  38
  39 /* Generate 32 random bits */
  40 #define RANDOM32BITS (rand() & 0xFFFF)
  41
  42 gchar *gencallid(void)
  43 {
  44         return g_strdup_printf("%04Xg%04Xa%04Xi%04Xm%04Xt%04Xb%04Xx%04Xx",
  45                                RANDOM32BITS, RANDOM32BITS, RANDOM32BITS,
  46                                RANDOM32BITS, RANDOM32BITS, RANDOM32BITS,
  47                                RANDOM32BITS, RANDOM32BITS);
  48 }
  49
  50 gchar *gentag(void)
  51 {
  52         return g_strdup_printf("%04d%04d", RANDOM32BITS, RANDOM32BITS);
  53 }
  54
  55 gchar *genconfid(void)
  56 {
  57         return g_strdup_printf("%04X%04X%04X%04X%04X%04X%04X%04X",
  58                                RANDOM32BITS, RANDOM32BITS, RANDOM32BITS,
  59                                RANDOM32BITS, RANDOM32BITS, RANDOM32BITS,
  60                                RANDOM32BITS, RANDOM32BITS);
  61 }
  62
  63 gchar *get_contact(const struct sipe_account_data  *sip)
  64 {
  65         return g_strdup(sip->contact);
  66 }
  67
  68 gchar *parse_from(const gchar *hdr)
  69 {
  70         gchar *from;
  71         const gchar *tmp, *tmp2 = hdr;
  72
  73         if (!hdr) return NULL;
  74         SIPE_DEBUG_INFO("parsing address out of %s", hdr);
  75         tmp = strchr(hdr, '<');
  76
  77         /* i hate the different SIP UA behaviours... */
  78         if (tmp) { /* sip address in <...> */
  79                 tmp2 = tmp + 1;
  80                 tmp = strchr(tmp2, '>');
  81                 if (tmp) {
  82                         from = g_strndup(tmp2, tmp - tmp2);
  83                 } else {
  84                         SIPE_DEBUG_INFO_NOFORMAT("found < without > in From");
  85                         return NULL;
  86                 }
  87         } else {
  88                 tmp = strchr(tmp2, ';');
  89                 if (tmp) {
  90                         from = g_strndup(tmp2, tmp - tmp2);
  91                 } else {
  92                         from = g_strdup(tmp2);
  93                 }
  94         }
  95         SIPE_DEBUG_INFO("got %s", from);
  96         return from;
  97 }
  98
  99 int parse_cseq(const gchar *hdr)
 100 {
 101         int res = -1;
 102         gchar **items;
 103         items = g_strsplit(hdr, " ", 1);
 104         if (items[0]) {
 105                 res = atoi(items[0]);
 106         }
 107         g_strfreev(items);
 108         return res;
 109 }
 110
 111 gchar *sip_uri_from_name(const gchar *name)
 112 {
 113         return(g_strdup_printf("sip:%s", name));
 114 }
 115
 116 gchar *sip_uri(const gchar *string)
 117 {
 118         return(strstr(string, "sip:") ? g_strdup(string) : sip_uri_from_name(string));
 119 }
 120
 121 gchar *
 122 get_epid(struct sipe_account_data *sip)
 123 {
 124         if (!sip->epid) {
 125                 gchar *self_sip_uri = sip_uri_self(sip);
 126                 sip->epid = sipe_get_epid(self_sip_uri,
 127                                           g_get_host_name(),
 128                                           purple_network_get_my_ip(-1));
 129                 g_free(self_sip_uri);
 130         }
 131         return g_strdup(sip->epid);
 132 }
 133
 134 guint
 135 sipe_get_pub_instance(struct sipe_account_data *sip,
 136                       int publication_key)
 137 {
 138         unsigned res = 0;
 139         gchar *epid = get_epid(sip);
 140
 141         sscanf(epid, "%08x", &res);
 142         g_free(epid);
 143
 144         if (publication_key == SIPE_PUB_DEVICE) {
 145                 /* as is */
 146         } else if (publication_key == SIPE_PUB_STATE_MACHINE) {         /* First hexadecimal digit is 0x3 */
 147                 res = (res >> 4) | 0x30000000;
 148         } else if (publication_key == SIPE_PUB_STATE_USER) {
 149                 res = 0x20000000; /* fixed */
 150         } else if (publication_key == SIPE_PUB_STATE_CALENDAR) {        /* First hexadecimal digit is 0x4 */
 151                 res = (res >> 4) | 0x40000000;
 152         } else if (publication_key == SIPE_PUB_STATE_CALENDAR_OOF) {    /* First hexadecimal digit is 0x5 */
 153                 res = (res >> 4) | 0x50000000;
 154         } else if (publication_key == SIPE_PUB_CALENDAR_DATA ||
 155                    publication_key == SIPE_PUB_NOTE_OOF)
 156         { /* First hexadecimal digit is 0x4 */
 157                 unsigned calendar_id = 0;
 158                 char *mail_hash = sipe_get_epid(sip->email, "", "");
 159
 160                 sscanf(mail_hash, "%08x", &calendar_id);
 161                 g_free(mail_hash);
 162                 res = (calendar_id >> 4) | 0x40000000;
 163         }
 164
 165         return res;
 166 }
 167 /* an old version
 168 guint
 169 sipe_get_pub_instance_(struct sipe_account_data *sip,
 170                       const char *publication_key)
 171 {
 172         unsigned part_1;
 173         unsigned part_2;
 174         gchar *epid = get_epid(sip);
 175         sscanf(epid, "%08x", &part_1);
 176         g_free(epid);
 177         sscanf(publication_key, "%uh", &part_2);
 178         return part_1 + part_2;
 179 }
 180 */
 181 gboolean
 182 sipe_is_bad_alias(const char *uri,
 183                   const char *alias)
 184 {
 185         char *uri_alias;
 186         gboolean result = FALSE;
 187
 188         if (!uri) return FALSE;
 189         if (!alias) return TRUE;
 190
 191         if (g_str_has_prefix(alias, "sip:") || g_str_has_prefix(alias, "sips:")) return TRUE;
 192
 193         /* check if alias is just SIP URI but without 'sip:' prefix */
 194         uri_alias = sip_uri_from_name(alias);
 195         if (sipe_strcase_equal(uri, uri_alias)) {
 196                 result = TRUE;
 197         }
 198         g_free(uri_alias);
 199
 200         return result;
 201 }
 202
 203 gboolean
 204 is_empty(const char *st)
 205 {
 206         if (!st || strlen(st) == 0)
 207         {
 208                 return TRUE;
 209         }
 210         /* suspecious leading or trailing staces */
 211         else if (isspace((unsigned char) *st) ||
 212                  isspace((unsigned char) *(st + strlen(st) - 1)))
 213         {
 214                 /* to not modify original string */
 215                 char *dup = g_strdup(st);
 216                 if (strlen(g_strstrip(dup)) == 0) {
 217                         g_free(dup);
 218                         return TRUE;
 219                 }
 220                 g_free(dup);
 221         }
 222         return FALSE;
 223 }
 224
 225 /** Returns newly allocated string. Must be g_free()'d */
 226 char *
 227 replace(const char *st,
 228         const char *search,
 229         const char *replace)
 230 {
 231         char **tmp;
 232         char *res;
 233
 234         if (!st) return NULL;
 235
 236         res = g_strjoinv(replace, tmp = g_strsplit(st, search, -1));
 237         g_strfreev(tmp);
 238         return res;
 239 }
 240
 241 char *
 242 fix_newlines(const char *st)
 243 {
 244         return replace(st, "\r\n", "\n");
 245 }
 246
 247 gboolean
 248 sipe_strequal(const gchar *left, const gchar *right)
 249 {
 250 #if GLIB_CHECK_VERSION(2,16,0)
 251         return (g_strcmp0(left, right) == 0);
 252 #else
 253         return ((left == NULL && right == NULL) ||
 254                 (left != NULL && right != NULL && strcmp(left, right) == 0));
 255 #endif
 256 }
 257
 258 gboolean
 259 sipe_strcase_equal(const gchar *left, const gchar *right)
 260 {
 261         return ((left == NULL && right == NULL) ||
 262                 (left != NULL && right != NULL && g_ascii_strcasecmp(left, right) == 0));
 263 }
 264
 265 time_t
 266 sipe_utils_str_to_time(const gchar *timestamp)
 267 {
 268         GTimeVal time;
 269         g_time_val_from_iso8601(timestamp, &time);
 270         return time.tv_sec;
 271 }
 272
 273 gchar *
 274 sipe_utils_time_to_str(time_t timestamp)
 275 {
 276         GTimeVal time = { timestamp, 0 };
 277         return g_time_val_to_iso8601(&time);
 278 }
 279
 280 size_t
 281 hex_str_to_buff(const char *hex_str, guint8 **buff)
 282 {
 283         char two_digits[3];
 284         size_t length;
 285         size_t i;
 286
 287         if (!buff) return 0;
 288         if (!hex_str) return 0;
 289
 290         length = strlen(hex_str)/2;
 291         *buff = (unsigned char *)g_malloc(length);
 292         for (i = 0; i < length; i++) {
 293                 two_digits[0] = hex_str[i * 2];
 294                 two_digits[1] = hex_str[i * 2 + 1];
 295                 two_digits[2] = '\0';
 296                 (*buff)[i] = (unsigned char)strtoul(two_digits, NULL, 16);
 297         }
 298
 299         return length;
 300 }
 301
 302 char *
 303 buff_to_hex_str(const guint8 *buff, const size_t buff_len)
 304 {
 305         char *res;
 306         size_t i, j;
 307
 308         if (!buff) return NULL;
 309
 310         res = g_malloc(buff_len * 2 + 1);
 311         for (i = 0, j = 0; i < buff_len; i++, j+=2) {
 312                 sprintf(&res[j], "%02X", buff[i]);
 313         }
 314         res[j] = '\0';
 315         return res;
 316 }
 317
 318 gboolean
 319 sipe_utils_parse_lines(GSList **list, gchar **lines)
 320 {
 321         int i;
 322         gchar **parts;
 323         gchar *dummy;
 324         gchar *dummy2;
 325         gchar *tmp;
 326
 327         for(i = 0; lines[i] && strlen(lines[i]) > 2; i++) {
 328                 parts = g_strsplit(lines[i], ":", 2);
 329                 if(!parts[0] || !parts[1]) {
 330                         g_strfreev(parts);
 331                         return FALSE;
 332                 }
 333                 dummy = parts[1];
 334                 dummy2 = 0;
 335                 while(*dummy==' ' || *dummy=='\t') dummy++;
 336                 dummy2 = g_strdup(dummy);
 337                 while(lines[i+1] && (lines[i+1][0]==' ' || lines[i+1][0]=='\t')) {
 338                         i++;
 339                         dummy = lines[i];
 340                         while(*dummy==' ' || *dummy=='\t') dummy++;
 341                         tmp = g_strdup_printf("%s %s",dummy2, dummy);
 342                         g_free(dummy2);
 343                         dummy2 = tmp;
 344                 }
 345                 *list = sipe_utils_nameval_add(*list, parts[0], dummy2);
 346                 g_free(dummy2);
 347                 g_strfreev(parts);
 348         }
 349
 350         return TRUE;
 351 }
 352
 353 GSList*
 354 sipe_utils_nameval_add(GSList* list, const gchar *name, const gchar *value)
 355 {
 356         struct sipnameval *element = g_new0(struct sipnameval,1);
 357
 358         /* SANITY CHECK: the calling code must be fixed if this happens! */
 359         if (!value) {
 360                 SIPE_DEBUG_ERROR("sipe_utils_nameval_add: NULL value for %s",
 361                                  name);
 362                 value = "";
 363         }
 364
 365         element->name = g_strdup(name);
 366         element->value = g_strdup(value);
 367         return g_slist_append(list, element);
 368 }
 369
 370 void
 371 sipe_utils_nameval_free(GSList *list) {
 372         struct sipnameval *elem;
 373         while(list) {
 374                 elem = list->data;
 375                 list = g_slist_remove(list,elem);
 376                 g_free(elem->name);
 377                 g_free(elem->value);
 378                 g_free(elem);
 379         }
 380 }
 381
 382 const gchar *
 383 sipe_utils_nameval_find(const GSList *list, const gchar *name)
 384 {
 385         return sipe_utils_nameval_find_instance (list, name, 0);
 386 }
 387
 388 const gchar *
 389 sipe_utils_nameval_find_instance(const GSList *list, const gchar *name, int which)
 390 {
 391         const GSList *tmp;
 392         struct sipnameval *elem;
 393         int i = 0;
 394         tmp = list;
 395         while(tmp) {
 396                 elem = tmp->data;
 397                 // OCS2005 can send the same header in either all caps or mixed case
 398                 if (sipe_strcase_equal(elem->name, name)) {
 399                         if (i == which) {
 400                                 return elem->value;
 401                         }
 402                         i++;
 403                 }
 404                 tmp = g_slist_next(tmp);
 405         }
 406         return NULL;
 407 }
 408
 409 gchar *sipe_utils_str_replace(const gchar *string,
 410                               const gchar *delimiter,
 411                               const gchar *replacement)
 412 {
 413         gchar **split;
 414         gchar *result;
 415
 416         if (!string || !delimiter || !replacement) return NULL;
 417
 418         split = g_strsplit(string, delimiter, 0);
 419         result = g_strjoinv(replacement, split);
 420         g_strfreev(split);
 421
 422         return result;
 423 }
 424
 425 /*
 426   Local Variables:
 427   mode: c
 428   c-file-style: "bsd"
 429   indent-tabs-mode: t
 430   tab-width: 8
 431   End:
 432 */