git.pond.sub.org Git - empserver/blob - src/lib/player/login.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See files README, COPYING and CREDITS in the root of the source
  23  *  tree for related information and legal notices.  It is expected
  24  *  that future projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  login.c: Allow the player to login
  29  *
  30  *  Known contributors to this file:
  31  *     Dave Pare, 1994
  32  *     Steve McClure, 2000
  33  *     Markus Armbruster, 2004-2005
  34  */
  35
  36 #include <config.h>
  37
  38 #include <string.h>
  39 #include "prototypes.h"
  40 #include "misc.h"
  41 #include "proto.h"
  42 #include "player.h"
  43 #include "com.h"
  44 #include "empthread.h"
  45 #include "empio.h"
  46 #include "match.h"
  47 #include "nsc.h"
  48 #include "nat.h"
  49 #include "optlist.h"
  50 #include "file.h"
  51 #include "subs.h"
  52 #include "common.h"
  53 #include "gen.h"
  54
  55 #if !defined(_WIN32)
  56 #include <netinet/in.h>
  57 #endif
  58 #include <errno.h>
  59
  60 extern struct cmndstr login_coms[];
  61
  62
  63 /*ARGSUSED*/
  64 void
  65 player_login(void *ud)
  66 {
  67     char buf[128];
  68     char space[128];
  69     int ac;
  70     int cmd;
  71
  72     player->proc = empth_self();
  73
  74     pr_id(player, C_INIT, "Empire server ready\n");
  75
  76     while (!io_eof(player->iop) && !io_error(player->iop)) {
  77         io_output(player->iop, IO_WAIT);
  78         if (io_gets(player->iop, buf, sizeof(buf)) < 0) {
  79             io_input(player->iop, IO_WAIT);
  80             continue;
  81         }
  82         ac = parse(buf, player->argp, NULL, space, NULL);
  83         cmd = comtch(player->argp[0], login_coms, 0);
  84         if (cmd < 0) {
  85             pr_id(player, C_BADCMD, "Command %s not found\n", player->argp[0]);
  86             continue;
  87         }
  88         switch (login_coms[cmd].c_addr()) {
  89         case RET_OK:
  90             break;
  91         case RET_FAIL:
  92             break;
  93         case RET_SYN:
  94             pr_id(player, C_BADCMD, "Usage %s\n", login_coms[cmd].c_form);
  95             break;
  96         default:
  97             break;
  98         }
  99         if (player->state >= PS_SHUTDOWN)
 100             break;
 101     }
 102     player->state = PS_SHUTDOWN;
 103     if (!io_eof(player->iop)) {
 104         pr_id(player, C_EXIT, "so long...\n");
 105         io_noblocking(player->iop, 0);
 106         while (io_output(player->iop, IO_WAIT) > 0) ;
 107     }
 108     player_delete(player);
 109     empth_exit();
 110     /*NOTREACHED*/
 111 }
 112
 113 static int
 114 client_cmd(void)
 115 {
 116     int i;
 117
 118     if (!player->argp[1])
 119         return RET_SYN;
 120
 121     for (i = 1; player->argp[i]; ++i) {
 122         if (i > 1)
 123             strncat(player->client, " ", sizeof(player->client) - 1);
 124         strncat(player->client, player->argp[i], sizeof(player->client) - 1);
 125     }
 126     player->client[sizeof(player->client) - 1] = '\0';
 127     pr_id(player, C_CMDOK, "talking to %s\n", player->client);
 128     return RET_OK;
 129 }
 130
 131 static int
 132 user_cmd(void)
 133 {
 134     if (!player->argp[1])
 135         return RET_SYN;
 136     strncpy(player->userid, player->argp[1], sizeof(player->userid) - 1);
 137     player->userid[sizeof(player->userid) - 1] = '\0';
 138     pr_id(player, C_CMDOK, "hello %s\n", player->userid);
 139     return RET_OK;
 140 }
 141
 142 static int
 143 sanc_cmd(void)
 144 {
 145     struct nstr_item ni;
 146     struct natstr nat;
 147     int first = 1;
 148
 149     if (!opt_BLITZ) {
 150         pr_id(player, C_BADCMD, "Command %s not found\n", player->argp[0]);
 151         return RET_FAIL;
 152     }
 153
 154     snxtitem_all(&ni, EF_NATION);
 155     while (nxtitem(&ni, &nat)) {
 156         if (nat.nat_stat != STAT_SANCT)
 157             continue;
 158         if (first) {
 159             pr_id(player, C_DATA,
 160                   "The following countries are still in sanctuary:\n");
 161             first = 0;
 162         }
 163         pr_id(player, C_DATA, "%s\n", nat.nat_cnam);
 164     }
 165     if (first)
 166         pr_id(player, C_CMDOK, "There are no countries in sanctuary\n");
 167     else
 168         pr_id(player, C_CMDOK, "\n");
 169     return RET_OK;
 170 }
 171
 172 static int
 173 coun_cmd(void)
 174 {
 175     natid cnum;
 176
 177     if (!player->argp[1])
 178         return RET_SYN;
 179     if (natbyname(player->argp[1], &cnum) < 0) {
 180         pr_id(player, C_CMDERR, "country %s does not exist\n", player->argp[1]);
 181         return RET_FAIL;
 182     }
 183     player->cnum = cnum;
 184     player->authenticated = 0;
 185     pr_id(player, C_CMDOK, "country name %s\n", player->argp[1]);
 186     return 0;
 187 }
 188
 189 static int
 190 pass_cmd(void)
 191 {
 192     if (!player->argp[1])
 193         return RET_SYN;
 194     if (player->cnum == 255) {
 195         pr_id(player, C_CMDERR, "need country first\n");
 196         return RET_FAIL;
 197     }
 198     if (!natpass(player->cnum, player->argp[1])) {
 199         pr_id(player, C_CMDERR, "password bad, logging entry\n");
 200         logerror("%s tried country #%d with %s",
 201                  praddr(player), player->cnum, player->argp[1]);
 202         return RET_FAIL;
 203     }
 204     player->authenticated = 1;
 205     pr_id(player, C_CMDOK, "password ok\n");
 206     logerror("%s using country #%d", praddr(player), player->cnum);
 207     return RET_OK;
 208 }
 209
 210 static int
 211 options_cmd(void)
 212 {
 213     /*
 214      * The option mechanism allows arbitrary string values, but so far
 215      * all options are flags in struct player.  Should be easy to
 216      * generalize if needed.
 217      */
 218     struct logoptstr {
 219         char *name;
 220         int val;
 221     };
 222     static struct logoptstr login_opts[] = {
 223         { "utf-8", PF_UTF8 }
 224     };
 225     char **ap;
 226     char *p;
 227     int opt;
 228     unsigned i;
 229
 230     if (!player->argp[1]) {
 231         for (i = 0; i < sizeof(login_opts) / sizeof(*login_opts); ++i)
 232             pr_id(player, C_DATA, "%s=%d\n",
 233                   login_opts[i].name,
 234                   (player->flags & login_opts[i].val) != 0);
 235         pr_id(player, C_CMDOK, "\n");
 236         return RET_OK;
 237     }
 238
 239     for (ap = player->argp+1; *ap; ++ap) {
 240         p = strchr(*ap, '=');
 241         if (p)
 242             *p++ = 0;
 243         opt = stmtch(*ap, login_opts,
 244                      offsetof(struct logoptstr, name),
 245                      sizeof(struct logoptstr));
 246         if (opt < 0) {
 247             pr_id(player, C_BADCMD, "Option %s not found\n", *ap);
 248             return RET_FAIL;
 249         }
 250         if (!p || atoi(p))
 251             player->flags |= login_opts[opt].val;
 252         else
 253             player->flags &= ~login_opts[opt].val;
 254     }
 255
 256     pr_id(player, C_CMDOK, "Accepted\n");
 257
 258     return RET_OK;
 259 }
 260
 261 static int
 262 may_play(void)
 263 {
 264     struct natstr *np;
 265
 266     if (player->cnum == 255 || !player->authenticated) {
 267         pr_id(player, C_CMDERR, "need country and password\n");
 268         return 0;
 269     }
 270     /* TODO strstr() cheesy, compare IP against IP/BITS ... */
 271     np = getnatp(player->cnum);
 272     if (np->nat_stat == STAT_GOD && *privip
 273         && !strstr(privip, player->hostaddr)) {
 274         logerror("Deity login from untrusted host attempted by %s",
 275                  praddr(player));
 276         logerror("To allow this, add %s to econfig key privip",
 277                  player->hostaddr);
 278         pr_id(player, C_EXIT,
 279               "Deity login not allowed from this IP!"
 280               "  See log for help on how to allow it.\n");
 281         return 0;
 282     }
 283     return 1;
 284 }
 285
 286 static int
 287 play_cmd(void)
 288 {
 289     struct player *other;
 290     natid cnum;
 291     struct natstr *natp;
 292     char **ap;
 293
 294     ap = player->argp;
 295     if (*++ap) {
 296         strncpy(player->userid, *ap, sizeof(player->userid) - 1);
 297         player->userid[sizeof(player->userid) - 1] = '\0';
 298         player->authenticated = 0;
 299     }
 300     if (*++ap) {
 301         if (natbyname(*ap, &cnum) < 0) {
 302             pr_id(player, C_CMDERR, "country %s does not exist\n", *ap);
 303             return RET_FAIL;
 304         }
 305     }
 306     if (*++ap) {
 307         if (!natpass(cnum, *ap)) {
 308             pr_id(player, C_CMDERR, "password bad, logging entry\n");
 309             logerror("%s tried country #%d with %s",
 310                      praddr(player), cnum, *ap);
 311             return RET_FAIL;
 312         }
 313         player->cnum = cnum;
 314         player->authenticated = 1;
 315     }
 316     if (!may_play())
 317         return RET_FAIL;
 318     other = getplayer((natid)player->cnum);
 319     if (other) {
 320         natp = getnatp(player->cnum);
 321         if (natp->nat_stat != STAT_VIS) {
 322             pr_id(player, C_EXIT, "country in use by %s\n", praddr(other));
 323         } else {
 324             pr_id(player, C_EXIT, "country in use\n");
 325         }
 326         return RET_FAIL;
 327     }
 328     logerror("%s logged in as country #%d", praddr(player), player->cnum);
 329     pr_id(player, C_INIT, "%d\n", CLIENTPROTO);
 330     player_main(player);
 331     logerror("%s logged out, country #%d", praddr(player), player->cnum);
 332     player->state = PS_SHUTDOWN;
 333     return RET_OK;
 334 }
 335
 336 static int
 337 kill_cmd(void)
 338 {
 339     struct player *other;
 340
 341     if (!may_play())
 342         return RET_FAIL;
 343     other = getplayer(player->cnum);
 344     if (!other) {
 345         pr_id(player, C_EXIT, "country not in use\n");
 346         return RET_FAIL;
 347     }
 348     logerror("%s killed country #%d", praddr(player), player->cnum);
 349     io_shutdown(other->iop, IO_READ | IO_WRITE);
 350     pr_id(player, C_EXIT, "closed socket of offending job\n");
 351     return RET_OK;
 352 }
 353
 354 static int
 355 quit_cmd(void)
 356 {
 357     pr_id(player, C_EXIT, "so long\n");
 358     io_shutdown(player->iop, IO_READ);
 359     return RET_OK;
 360 }
 361
 362 struct cmndstr login_coms[] = {
 363     {"client client-id...", 0, client_cmd, 0, 0},
 364     {"coun country", 0, coun_cmd, 0, 0},
 365     {"kill", 0, kill_cmd, 0, 0},
 366     {"options option=value...", 0, options_cmd, 0, 0},
 367     {"pass password", 0, pass_cmd, 0, 0},
 368     {"play [user [country [password]]]", 0, play_cmd, 0, 0},
 369     {"quit", 0, quit_cmd, 0, 0},
 370     {"sanc", 0, sanc_cmd, 0, 0},
 371     {"user name", 0, user_cmd, 0, 0},
 372     {0, 0, 0, 0, 0}
 373 };