appl/popper/pop_debug.c

   1 /*
   2  * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /* Tiny program to help debug popper */
  35
  36 #include "popper.h"
  37 RCSID("$Id$");
  38
  39 static void
  40 loop(int s)
  41 {
  42     char cmd[1024];
  43     char buf[1024];
  44     fd_set fds;
  45     while(1){
  46         FD_ZERO(&fds);
  47         FD_SET(0, &fds);
  48         FD_SET(s, &fds);
  49         if(select(s+1, &fds, 0, 0, 0) < 0)
  50             err(1, "select");
  51         if(FD_ISSET(0, &fds)){
  52             fgets(cmd, sizeof(cmd), stdin);
  53             cmd[strlen(cmd) - 1] = '\0';
  54             strlcat (cmd, "\r\n", sizeof(cmd));
  55             write(s, cmd, strlen(cmd));
  56         }
  57         if(FD_ISSET(s, &fds)){
  58             int n = read(s, buf, sizeof(buf));
  59             if(n == 0)
  60                 exit(0);
  61             fwrite(buf, n, 1, stdout);
  62         }
  63     }
  64 }
  65
  66 static int
  67 get_socket (const char *hostname, int port)
  68 {
  69     int ret;
  70     struct addrinfo *ai, *a;
  71     struct addrinfo hints;
  72     char portstr[NI_MAXSERV];
  73
  74     memset (&hints, 0, sizeof(hints));
  75     hints.ai_socktype = SOCK_STREAM;
  76     snprintf (portstr, sizeof(portstr), "%d", ntohs(port));
  77     ret = getaddrinfo (hostname, portstr, &hints, &ai);
  78     if (ret)
  79         errx (1, "getaddrinfo %s: %s", hostname, gai_strerror (ret));
  80
  81     for (a = ai; a != NULL; a = a->ai_next) {
  82         int s;
  83
  84         s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
  85         if (s < 0)
  86             continue;
  87         if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
  88             close (s);
  89             continue;
  90         }
  91         freeaddrinfo (ai);
  92         return s;
  93     }
  94     err (1, "failed to connect to %s", hostname);
  95 }
  96
  97 #ifdef KRB5
  98 static int
  99 doit_v5 (char *host, int port)
 100 {
 101     krb5_error_code ret;
 102     krb5_context context;
 103     krb5_auth_context auth_context = NULL;
 104     krb5_principal server;
 105     int s = get_socket (host, port);
 106
 107     ret = krb5_init_context (&context);
 108     if (ret)
 109         errx (1, "krb5_init_context failed: %d", ret);
 110
 111     ret = krb5_sname_to_principal (context,
 112                                    host,
 113                                    "pop",
 114                                    KRB5_NT_SRV_HST,
 115                                    &server);
 116     if (ret) {
 117         warnx ("krb5_sname_to_principal: %s",
 118                krb5_get_err_text (context, ret));
 119         return 1;
 120     }
 121     ret = krb5_sendauth (context,
 122                          &auth_context,
 123                          &s,
 124                          "KPOPV1.0",
 125                          NULL,
 126                          server,
 127                          0,
 128                          NULL,
 129                          NULL,
 130                          NULL,
 131                          NULL,
 132                          NULL,
 133                          NULL);
 134      if (ret) {
 135          warnx ("krb5_sendauth: %s",
 136                 krb5_get_err_text (context, ret));
 137          return 1;
 138      }
 139      loop (s);
 140      return 0;
 141 }
 142 #endif
 143
 144
 145 #ifdef KRB5
 146 static int use_v5 = -1;
 147 #endif
 148 static char *port_str;
 149 static int do_version;
 150 static int do_help;
 151
 152 struct getargs args[] = {
 153 #ifdef KRB5
 154     { "krb5",   '5', arg_flag,          &use_v5,        "Use Kerberos V5",
 155       NULL },
 156 #endif
 157     { "port",   'p', arg_string,        &port_str,      "Use this port",
 158       "number-or-service" },
 159     { "version", 0,  arg_flag,          &do_version,    "Print version",
 160       NULL },
 161     { "help",    0,  arg_flag,          &do_help,       NULL,
 162       NULL }
 163 };
 164
 165 static void
 166 usage (int ret)
 167 {
 168     arg_printusage (args,
 169                     sizeof(args) / sizeof(args[0]),
 170                     NULL,
 171                     "hostname");
 172     exit (ret);
 173 }
 174
 175 int
 176 main(int argc, char **argv)
 177 {
 178     int port = 0;
 179     int ret = 1;
 180     int optind = 0;
 181
 182     setprogname(argv[0]);
 183
 184     if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv,
 185                 &optind))
 186         usage (1);
 187
 188     argc -= optind;
 189     argv += optind;
 190
 191     if (do_help)
 192         usage (0);
 193
 194     if (do_version) {
 195         print_version (NULL);
 196         return 0;
 197     }
 198
 199     if (argc < 1)
 200         usage (1);
 201
 202     if (port_str) {
 203         struct servent *s = roken_getservbyname (port_str, "tcp");
 204
 205         if (s)
 206             port = s->s_port;
 207         else {
 208             char *ptr;
 209
 210             port = strtol (port_str, &ptr, 10);
 211             if (port == 0 && ptr == port_str)
 212                 errx (1, "Bad port `%s'", port_str);
 213             port = htons(port);
 214         }
 215     }
 216     if (port == 0) {
 217 #ifdef KRB5
 218         port = krb5_getportbyname (NULL, "kpop", "tcp", 1109);
 219 #else
 220 #error must define KRB5
 221 #endif
 222     }
 223
 224 #ifdef KRB5
 225     if (ret && use_v5) {
 226         ret = doit_v5 (argv[0], port);
 227     }
 228 #endif
 229     return ret;
 230 }