lib/af.c

   1 /*
   2  * lib/af.c   This file contains the top-level part of the protocol
   3  *              support functions module for the NET-2 base distribution.
   4  *
   5  * Version:     $Id: af.c,v 1.13 2000/05/20 13:38:10 pb Exp $
   6  *
   7  * Author:      Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
   8  *              Copyright 1993 MicroWalt Corporation
   9  *
  10  *              This program is free software; you can redistribute it
  11  *              and/or  modify it under  the terms of  the GNU General
  12  *              Public  License as  published  by  the  Free  Software
  13  *              Foundation;  either  version 2 of the License, or  (at
  14  *              your option) any later version.
  15  */
  16 #include <sys/types.h>
  17 #include <sys/socket.h>
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <errno.h>
  21 #include <ctype.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include "config.h"
  25 #include "net-support.h"
  26 #include "pathnames.h"
  27 #include "intl.h"
  28 #include "util.h"
  29
  30 int flag_unx;
  31 int flag_ipx;
  32 int flag_ax25;
  33 int flag_ddp;
  34 int flag_netrom;
  35 int flag_inet;
  36 int flag_inet6;
  37 int flag_econet;
  38 int flag_x25 = 0;
  39 int flag_ash;
  40
  41
  42 struct aftrans_t {
  43     char *alias;
  44     char *name;
  45     int *flag;
  46 } aftrans[] = {
  47
  48     {
  49         "ax25", "ax25", &flag_ax25
  50     },
  51     {
  52         "ip", "inet", &flag_inet
  53     },
  54     {
  55         "ip6", "inet6", &flag_inet6
  56     },
  57     {
  58         "ipx", "ipx", &flag_ipx
  59     },
  60     {
  61         "appletalk", "ddp", &flag_ddp
  62     },
  63     {
  64         "netrom", "netrom", &flag_netrom
  65     },
  66     {
  67         "inet", "inet", &flag_inet
  68     },
  69     {
  70         "inet6", "inet6", &flag_inet6
  71     },
  72     {
  73         "ddp", "ddp", &flag_ddp
  74     },
  75     {
  76         "unix", "unix", &flag_unx
  77     },
  78     {
  79         "tcpip", "inet", &flag_inet
  80     },
  81     {
  82         "econet", "ec", &flag_econet
  83     },
  84     {
  85         "x25", "x25", &flag_x25
  86     },
  87     {
  88         "ash", "ash", &flag_ash
  89     },
  90     {
  91         0, 0, 0
  92     }
  93 };
  94
  95 char afname[256] = "";
  96
  97 extern struct aftype unspec_aftype;
  98 extern struct aftype unix_aftype;
  99 extern struct aftype inet_aftype;
 100 extern struct aftype inet6_aftype;
 101 extern struct aftype ax25_aftype;
 102 extern struct aftype netrom_aftype;
 103 extern struct aftype ipx_aftype;
 104 extern struct aftype ddp_aftype;
 105 extern struct aftype ec_aftype;
 106 extern struct aftype x25_aftype;
 107 extern struct aftype rose_aftype;
 108 extern struct aftype ash_aftype;
 109
 110 static short sVafinit = 0;
 111
 112 struct aftype *aftypes[] =
 113 {
 114 #if HAVE_AFUNIX
 115     &unix_aftype,
 116 #endif
 117 #if HAVE_AFINET
 118     &inet_aftype,
 119 #endif
 120 #if HAVE_AFINET6
 121     &inet6_aftype,
 122 #endif
 123 #if HAVE_AFAX25
 124     &ax25_aftype,
 125 #endif
 126 #if HAVE_AFNETROM
 127     &netrom_aftype,
 128 #endif
 129 #if HAVE_AFROSE
 130     &rose_aftype,
 131 #endif
 132 #if HAVE_AFIPX
 133     &ipx_aftype,
 134 #endif
 135 #if HAVE_AFATALK
 136     &ddp_aftype,
 137 #endif
 138 #if HAVE_AFECONET
 139     &ec_aftype,
 140 #endif
 141 #if HAVE_AFASH
 142     &ash_aftype,
 143 #endif
 144 #if HAVE_AFX25
 145     &x25_aftype,
 146 #endif
 147     &unspec_aftype,
 148     NULL
 149 };
 150
 151 void afinit()
 152 {
 153     unspec_aftype.title = _("UNSPEC");
 154 #if HAVE_AFUNIX
 155     unix_aftype.title = _("UNIX Domain");
 156 #endif
 157 #if HAVE_AFINET
 158     inet_aftype.title = _("DARPA Internet");
 159 #endif
 160 #if HAVE_AFINET6
 161     inet6_aftype.title = _("IPv6");
 162 #endif
 163 #if HAVE_AFAX25
 164     ax25_aftype.title = _("AMPR AX.25");
 165 #endif
 166 #if HAVE_AFNETROM
 167     netrom_aftype.title = _("AMPR NET/ROM");
 168 #endif
 169 #if HAVE_AFIPX
 170     ipx_aftype.title = _("Novell IPX");
 171 #endif
 172 #if HAVE_AFATALK
 173     ddp_aftype.title = _("Appletalk DDP");
 174 #endif
 175 #if HAVE_AFECONET
 176     ec_aftype.title = _("Econet");
 177 #endif
 178 #if HAVE_AFX25
 179     x25_aftype.title = _("CCITT X.25");
 180 #endif
 181 #if HAVE_AFROSE
 182     rose_aftype.title = _("AMPR ROSE");
 183 #endif
 184 #if HAVE_AFASH
 185     ash_aftype.title = _("Ash");
 186 #endif
 187     sVafinit = 1;
 188 }
 189
 190 /* set the default AF list from the program name or a constant value    */
 191 void aftrans_def(char *tool, char *argv0, char *dflt)
 192 {
 193     char *tmp;
 194     char *buf;
 195
 196     strcpy(afname, dflt);
 197
 198     if (!(tmp = strrchr(argv0, '/')))
 199         tmp = argv0;            /* no slash?! */
 200     else
 201         tmp++;
 202
 203     if (!(buf = strdup(tmp)))
 204         return;
 205
 206     if (strlen(tool) >= strlen(tmp)) {
 207         free(buf);
 208         return;
 209     }
 210     tmp = buf + (strlen(tmp) - strlen(tool));
 211
 212     if (strcmp(tmp, tool) != 0) {
 213         free(buf);
 214         return;
 215     }
 216     *tmp = '\0';
 217     if ((tmp = strchr(buf, '_')))
 218         *tmp = '\0';
 219
 220     afname[0] = '\0';
 221     if (aftrans_opt(buf))
 222         strcpy(afname, buf);
 223
 224     free(buf);
 225 }
 226
 227
 228 /* Check our protocol family table for this family. */
 229 struct aftype *get_aftype(const char *name)
 230 {
 231     struct aftype **afp;
 232
 233     if (!sVafinit)
 234         afinit();
 235
 236     afp = aftypes;
 237     while (*afp != NULL) {
 238         if (!strcmp((*afp)->name, name))
 239             return (*afp);
 240         afp++;
 241     }
 242     if (index(name, ','))
 243         fprintf(stderr, _("Please don't supply more than one address family.\n"));
 244     return (NULL);
 245 }
 246
 247
 248 /* Check our protocol family table for this family. */
 249 struct aftype *get_afntype(int af)
 250 {
 251     struct aftype **afp;
 252
 253     if (!sVafinit)
 254         afinit();
 255
 256     afp = aftypes;
 257     while (*afp != NULL) {
 258         if ((*afp)->af == af)
 259             return (*afp);
 260         afp++;
 261     }
 262     return (NULL);
 263 }
 264
 265 /* Check our protocol family table for this family and return its socket */
 266 int get_socket_for_af(int af)
 267 {
 268     struct aftype **afp;
 269
 270     if (!sVafinit)
 271         afinit();
 272
 273     afp = aftypes;
 274     while (*afp != NULL) {
 275         if ((*afp)->af == af)
 276             return (*afp)->fd;
 277         afp++;
 278     }
 279     return -1;
 280 }
 281
 282 int aftrans_opt(const char *arg)
 283 {
 284     struct aftrans_t *paft;
 285     char *tmp1, *tmp2;
 286     char buf[256];
 287
 288     safe_strncpy(buf, arg, sizeof(buf));
 289
 290     tmp1 = buf;
 291
 292     while (tmp1) {
 293
 294         tmp2 = index(tmp1, ',');
 295
 296         if (tmp2)
 297             *(tmp2++) = '\0';
 298
 299         paft = aftrans;
 300         for (paft = aftrans; paft->alias; paft++) {
 301             if (strcmp(tmp1, paft->alias))
 302                 continue;
 303             if (strlen(paft->name) + strlen(afname) + 1 >= sizeof(afname)) {
 304                 fprintf(stderr, _("Too much address family arguments.\n"));
 305                 return (0);
 306             }
 307             if (paft->flag)
 308                 (*paft->flag)++;
 309             if (afname[0])
 310                 strcat(afname, ",");
 311             strcat(afname, paft->name);
 312             break;
 313         }
 314         if (!paft->alias) {
 315             fprintf(stderr, _("Unknown address family `%s'.\n"), tmp1);
 316             return (1);
 317         }
 318         tmp1 = tmp2;
 319     }
 320
 321     return (0);
 322 }
 323
 324 /* type: 0=all, 1=getroute */
 325 void print_aflist(int type) {
 326     int count = 0;
 327     char * txt;
 328     struct aftype **afp;
 329
 330     if (!sVafinit)
 331         afinit();
 332
 333     afp = aftypes;
 334     while (*afp != NULL) {
 335         if ((type == 1 && ((*afp)->rprint == NULL)) || ((*afp)->af == 0)) {
 336                 afp++; continue;
 337         }
 338         if ((count % 3) == 0) fprintf(stderr,count?"\n    ":"    ");
 339         txt = (*afp)->name; if (!txt) txt = "..";
 340         fprintf(stderr,"%s (%s) ",txt,(*afp)->title);
 341         count++;
 342         afp++;
 343     }
 344     fprintf(stderr,"\n");
 345 }