ircd/sslproc.c

   1 /*
   2  *  sslproc.c: An interface to ssld
   3  *  Copyright (C) 2007 Aaron Sethman <androsyn@ratbox.org>
   4  *  Copyright (C) 2007 ircd-ratbox development team
   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  19  *  USA
  20  */
  21
  22 #include <rb_lib.h>
  23 #include "stdinc.h"
  24
  25
  26 #include "s_conf.h"
  27 #include "logger.h"
  28 #include "listener.h"
  29 #include "sslproc.h"
  30 #include "s_serv.h"
  31 #include "ircd.h"
  32 #include "hash.h"
  33 #include "client.h"
  34 #include "send.h"
  35 #include "packet.h"
  36 #include "certfp.h"
  37
  38 #define ZIPSTATS_TIME           60
  39
  40 static void collect_zipstats(void *unused);
  41 static void ssl_read_ctl(rb_fde_t * F, void *data);
  42 static int ssld_count;
  43
  44 static char tmpbuf[READBUF_SIZE];
  45 static char nul = '\0';
  46
  47 #define MAXPASSFD 4
  48 #define READSIZE 1024
  49 typedef struct _ssl_ctl_buf
  50 {
  51         rb_dlink_node node;
  52         char *buf;
  53         size_t buflen;
  54         rb_fde_t *F[MAXPASSFD];
  55         int nfds;
  56 } ssl_ctl_buf_t;
  57
  58
  59 struct _ssl_ctl
  60 {
  61         rb_dlink_node node;
  62         int cli_count;
  63         rb_fde_t *F;
  64         rb_fde_t *P;
  65         pid_t pid;
  66         rb_dlink_list readq;
  67         rb_dlink_list writeq;
  68         uint8_t shutdown;
  69         uint8_t dead;
  70         char version[256];
  71 };
  72
  73 static void ssld_update_config_one(ssl_ctl_t *ctl);
  74 static void send_new_ssl_certs_one(ssl_ctl_t * ctl);
  75 static void send_certfp_method(ssl_ctl_t *ctl);
  76
  77
  78 static rb_dlink_list ssl_daemons;
  79
  80 static inline uint32_t
  81 buf_to_uint32(char *buf)
  82 {
  83         uint32_t x;
  84         memcpy(&x, buf, sizeof(x));
  85         return x;
  86 }
  87
  88 static inline void
  89 uint32_to_buf(char *buf, uint32_t x)
  90 {
  91         memcpy(buf, &x, sizeof(x));
  92         return;
  93 }
  94
  95 static ssl_ctl_t *
  96 allocate_ssl_daemon(rb_fde_t * F, rb_fde_t * P, int pid)
  97 {
  98         ssl_ctl_t *ctl;
  99
 100         if(F == NULL || pid < 0)
 101                 return NULL;
 102         ctl = rb_malloc(sizeof(ssl_ctl_t));
 103         ctl->F = F;
 104         ctl->P = P;
 105         ctl->pid = pid;
 106         ssld_count++;
 107         rb_dlinkAdd(ctl, &ctl->node, &ssl_daemons);
 108         return ctl;
 109 }
 110
 111 static void
 112 free_ssl_daemon(ssl_ctl_t * ctl)
 113 {
 114         rb_dlink_node *ptr;
 115         ssl_ctl_buf_t *ctl_buf;
 116         int x;
 117         if(ctl->cli_count)
 118                 return;
 119
 120         RB_DLINK_FOREACH(ptr, ctl->readq.head)
 121         {
 122                 ctl_buf = ptr->data;
 123                 for(x = 0; x < ctl_buf->nfds; x++)
 124                         rb_close(ctl_buf->F[x]);
 125
 126                 rb_free(ctl_buf->buf);
 127                 rb_free(ctl_buf);
 128         }
 129
 130         RB_DLINK_FOREACH(ptr, ctl->writeq.head)
 131         {
 132                 ctl_buf = ptr->data;
 133                 for(x = 0; x < ctl_buf->nfds; x++)
 134                         rb_close(ctl_buf->F[x]);
 135
 136                 rb_free(ctl_buf->buf);
 137                 rb_free(ctl_buf);
 138         }
 139         rb_close(ctl->F);
 140         rb_close(ctl->P);
 141         rb_dlinkDelete(&ctl->node, &ssl_daemons);
 142         rb_free(ctl);
 143 }
 144
 145 static char *ssld_path;
 146
 147 static int ssld_spin_count = 0;
 148 static time_t last_spin;
 149 static int ssld_wait = 0;
 150
 151
 152 void
 153 restart_ssld(void)
 154 {
 155         rb_dlink_node *ptr, *next;
 156         ssl_ctl_t *ctl;
 157
 158         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 159         {
 160                 ctl = ptr->data;
 161                 if(ctl->dead)
 162                         continue;
 163                 if(ctl->shutdown)
 164                         continue;
 165                 ctl->shutdown = 1;
 166                 ssld_count--;
 167                 if(!ctl->cli_count)
 168                 {
 169                         rb_kill(ctl->pid, SIGKILL);
 170                         free_ssl_daemon(ctl);
 171                 }
 172         }
 173
 174         ssld_spin_count = 0;
 175         last_spin = 0;
 176         ssld_wait = 0;
 177         start_ssldaemon(ServerInfo.ssld_count);
 178 }
 179
 180 static void
 181 ssl_killall(void)
 182 {
 183         rb_dlink_node *ptr, *next;
 184         ssl_ctl_t *ctl;
 185         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 186         {
 187                 ctl = ptr->data;
 188                 if(ctl->dead)
 189                         continue;
 190                 ctl->dead = 1;
 191                 if(!ctl->shutdown)
 192                         ssld_count--;
 193                 rb_kill(ctl->pid, SIGKILL);
 194                 if(!ctl->cli_count)
 195                         free_ssl_daemon(ctl);
 196         }
 197 }
 198
 199 static void
 200 ssl_dead(ssl_ctl_t * ctl)
 201 {
 202         if(ctl->dead)
 203                 return;
 204
 205         ctl->dead = 1;
 206         rb_kill(ctl->pid, SIGKILL);     /* make sure the process is really gone */
 207
 208         if(!ctl->shutdown)
 209         {
 210                 ssld_count--;
 211                 ilog(L_MAIN, "ssld helper died - attempting to restart");
 212                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "ssld helper died - attempting to restart");
 213                 start_ssldaemon(1);
 214         }
 215 }
 216
 217 static void
 218 ssl_do_pipe(rb_fde_t * F, void *data)
 219 {
 220         int retlen;
 221         ssl_ctl_t *ctl = data;
 222         retlen = rb_write(F, "0", 1);
 223         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 224         {
 225                 ssl_dead(ctl);
 226                 return;
 227         }
 228         rb_setselect(F, RB_SELECT_READ, ssl_do_pipe, data);
 229 }
 230
 231 static void
 232 restart_ssld_event(void *unused)
 233 {
 234         ssld_spin_count = 0;
 235         last_spin = 0;
 236         ssld_wait = 0;
 237         if(ServerInfo.ssld_count > get_ssld_count())
 238         {
 239                 int start = ServerInfo.ssld_count - get_ssld_count();
 240                 ilog(L_MAIN, "Attempting to restart ssld processes");
 241                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Attempt to restart ssld processes");
 242                 start_ssldaemon(start);
 243         }
 244 }
 245
 246 int
 247 start_ssldaemon(int count)
 248 {
 249         rb_fde_t *F1, *F2;
 250         rb_fde_t *P1, *P2;
 251 #ifdef _WIN32
 252         const char *suffix = ".exe";
 253 #else
 254         const char *suffix = "";
 255 #endif
 256
 257         char fullpath[PATH_MAX + 1];
 258         char fdarg[6];
 259         const char *parv[2];
 260         char buf[128];
 261         char s_pid[10];
 262         pid_t pid;
 263         int started = 0, i;
 264
 265         if(ssld_wait)
 266                 return 0;
 267
 268         if(ssld_spin_count > 20 && (rb_current_time() - last_spin < 5))
 269         {
 270                 ilog(L_MAIN, "ssld helper is spinning - will attempt to restart in 1 minute");
 271                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
 272                                        "ssld helper is spinning - will attempt to restart in 1 minute");
 273                 rb_event_add("restart_ssld_event", restart_ssld_event, NULL, 60);
 274                 ssld_wait = 1;
 275                 return 0;
 276         }
 277
 278         ssld_spin_count++;
 279         last_spin = rb_current_time();
 280
 281         if(ssld_path == NULL)
 282         {
 283                 snprintf(fullpath, sizeof(fullpath), "%s%cssld%s", ircd_paths[IRCD_PATH_LIBEXEC], RB_PATH_SEPARATOR, suffix);
 284
 285                 if(access(fullpath, X_OK) == -1)
 286                 {
 287                         snprintf(fullpath, sizeof(fullpath), "%s%cbin%cssld%s",
 288                                     ConfigFileEntry.dpath, RB_PATH_SEPARATOR, RB_PATH_SEPARATOR, suffix);
 289                         if(access(fullpath, X_OK) == -1)
 290                         {
 291                                 ilog(L_MAIN,
 292                                      "Unable to execute ssld%s in %s or %s/bin",
 293                                      suffix, ircd_paths[IRCD_PATH_LIBEXEC], ConfigFileEntry.dpath);
 294                                 return 0;
 295                         }
 296                 }
 297                 ssld_path = rb_strdup(fullpath);
 298         }
 299         rb_strlcpy(buf, "-ircd ssld daemon", sizeof(buf));
 300         parv[0] = buf;
 301         parv[1] = NULL;
 302
 303         for(i = 0; i < count; i++)
 304         {
 305                 ssl_ctl_t *ctl;
 306                 if(rb_socketpair(AF_UNIX, SOCK_DGRAM, 0, &F1, &F2, "SSL/TLS handle passing socket") == -1)
 307                 {
 308                         ilog(L_MAIN, "Unable to create ssld - rb_socketpair failed: %s", strerror(errno));
 309                         return started;
 310                 }
 311
 312                 rb_set_buffers(F1, READBUF_SIZE);
 313                 rb_set_buffers(F2, READBUF_SIZE);
 314                 snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(F2));
 315                 rb_setenv("CTL_FD", fdarg, 1);
 316                 if(rb_pipe(&P1, &P2, "SSL/TLS pipe") == -1)
 317                 {
 318                         ilog(L_MAIN, "Unable to create ssld - rb_pipe failed: %s", strerror(errno));
 319                         return started;
 320                 }
 321                 snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(P1));
 322                 rb_setenv("CTL_PIPE", fdarg, 1);
 323                 snprintf(s_pid, sizeof(s_pid), "%d", (int)getpid());
 324                 rb_setenv("CTL_PPID", s_pid, 1);
 325
 326                 rb_clear_cloexec(F2);
 327                 rb_clear_cloexec(P1);
 328
 329                 pid = rb_spawn_process(ssld_path, (const char **) parv);
 330                 if(pid == -1)
 331                 {
 332                         ilog(L_MAIN, "Unable to create ssld: %s\n", strerror(errno));
 333                         rb_close(F1);
 334                         rb_close(F2);
 335                         rb_close(P1);
 336                         rb_close(P2);
 337                         return started;
 338                 }
 339                 started++;
 340                 rb_close(F2);
 341                 rb_close(P1);
 342                 ctl = allocate_ssl_daemon(F1, P2, pid);
 343                 if(ircd_ssl_ok)
 344                         ssld_update_config_one(ctl);
 345                 ssl_read_ctl(ctl->F, ctl);
 346                 ssl_do_pipe(P2, ctl);
 347
 348         }
 349         return started;
 350 }
 351
 352 static void
 353 ssl_process_zipstats(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 354 {
 355         struct Client *server;
 356         struct ZipStats *zips;
 357         char *parv[6];
 358         int parc = rb_string_to_array(ctl_buf->buf, parv, sizeof(parv));
 359
 360         if (parc < sizeof(parv))
 361                 return;
 362
 363         server = find_server(NULL, parv[1]);
 364         if(server == NULL || server->localClient == NULL || !IsCapable(server, CAP_ZIP))
 365                 return;
 366         if(server->localClient->zipstats == NULL)
 367                 server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 368
 369         zips = server->localClient->zipstats;
 370
 371         zips->in += strtoull(parv[2], NULL, 10);
 372         zips->in_wire += strtoull(parv[3], NULL, 10);
 373         zips->out += strtoull(parv[4], NULL, 10);
 374         zips->out_wire += strtoull(parv[5], NULL, 10);
 375
 376         if(zips->in > 0)
 377                 zips->in_ratio = ((double) (zips->in - zips->in_wire) / (double) zips->in) * 100.00;
 378         else
 379                 zips->in_ratio = 0;
 380
 381         if(zips->out > 0)
 382                 zips->out_ratio = ((double) (zips->out - zips->out_wire) / (double) zips->out) * 100.00;
 383         else
 384                 zips->out_ratio = 0;
 385 }
 386
 387 static void
 388 ssl_process_open_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 389 {
 390         struct Client *client_p;
 391         uint32_t fd;
 392
 393         if(ctl_buf->buflen < 5)
 394                 return; /* bogus message..drop it.. XXX should warn here */
 395
 396         fd = buf_to_uint32(&ctl_buf->buf[1]);
 397         client_p = find_cli_connid_hash(fd);
 398         if(client_p == NULL || client_p->localClient == NULL)
 399                 return;
 400
 401         if(client_p->localClient->ssl_callback)
 402         {
 403                 SSL_OPEN_CB *hdl = client_p->localClient->ssl_callback;
 404
 405                 client_p->localClient->ssl_callback = NULL;
 406
 407                 hdl(client_p, RB_OK);
 408         }
 409 }
 410
 411 static void
 412 ssl_process_dead_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 413 {
 414         struct Client *client_p;
 415         char reason[256];
 416         uint32_t fd;
 417
 418         if(ctl_buf->buflen < 6)
 419                 return;         /* bogus message..drop it.. XXX should warn here */
 420
 421         fd = buf_to_uint32(&ctl_buf->buf[1]);
 422         rb_strlcpy(reason, &ctl_buf->buf[5], sizeof(reason));
 423         client_p = find_cli_connid_hash(fd);
 424         if(client_p == NULL || client_p->localClient == NULL)
 425                 return;
 426
 427         if(IsAnyServer(client_p))
 428         {
 429                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "ssld error for %s: %s", client_p->name, reason);
 430                 ilog(L_SERVER, "ssld error for %s: %s", log_client_name(client_p, SHOW_IP), reason);
 431         }
 432
 433         /* if there is still a pending callback, call it now */
 434         if(client_p->localClient->ssl_callback)
 435         {
 436                 SSL_OPEN_CB *hdl = client_p->localClient->ssl_callback;
 437
 438                 client_p->localClient->ssl_callback = NULL;
 439
 440                 if (hdl(client_p, RB_ERROR_SSL))
 441                 {
 442                         /* the callback has exited the client */
 443                         return;
 444                 }
 445         }
 446
 447         if(IsAnyServer(client_p) || IsRegistered(client_p))
 448         {
 449                 /* read any last moment ERROR, QUIT or the like -- jilles */
 450                 if (!strcmp(reason, "Remote host closed the connection"))
 451                         read_packet(client_p->localClient->F, client_p);
 452                 if (IsAnyDead(client_p))
 453                         return;
 454         }
 455         exit_client(client_p, client_p, &me, reason);
 456 }
 457
 458
 459 static void
 460 ssl_process_cipher_string(ssl_ctl_t *ctl, ssl_ctl_buf_t *ctl_buf)
 461 {
 462         struct Client *client_p;
 463         const char *cstring;
 464         uint32_t fd;
 465
 466         if(ctl_buf->buflen < 6)
 467                 return;         /* bogus message..drop it.. XXX should warn here */
 468
 469         fd = buf_to_uint32(&ctl_buf->buf[1]);
 470         cstring = (const char *)&ctl_buf->buf[5];
 471
 472         if(EmptyString(cstring))
 473                 return;
 474
 475         client_p = find_cli_connid_hash(fd);
 476         if(client_p != NULL && client_p->localClient != NULL)
 477         {
 478                 rb_free(client_p->localClient->cipher_string);
 479                 client_p->localClient->cipher_string = rb_strdup(cstring);
 480         }
 481 }
 482
 483
 484 static void
 485 ssl_process_certfp(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 486 {
 487         struct Client *client_p;
 488         uint32_t fd;
 489         uint32_t certfp_method;
 490         uint32_t len;
 491         uint8_t *certfp;
 492         char *certfp_string;
 493         const char *method_string;
 494         int method_len;
 495
 496         if(ctl_buf->buflen > 13 + RB_SSL_CERTFP_LEN)
 497                 return;         /* bogus message..drop it.. XXX should warn here */
 498
 499         fd = buf_to_uint32(&ctl_buf->buf[1]);
 500         certfp_method = buf_to_uint32(&ctl_buf->buf[5]);
 501         len = buf_to_uint32(&ctl_buf->buf[9]);
 502         certfp = (uint8_t *)&ctl_buf->buf[13];
 503         client_p = find_cli_connid_hash(fd);
 504         if(client_p == NULL)
 505                 return;
 506
 507         switch (certfp_method) {
 508         case RB_SSL_CERTFP_METH_CERT_SHA1:
 509                 method_string = CERTFP_PREFIX_CERT_SHA1;
 510                 break;
 511         case RB_SSL_CERTFP_METH_CERT_SHA256:
 512                 method_string = CERTFP_PREFIX_CERT_SHA256;
 513                 break;
 514         case RB_SSL_CERTFP_METH_CERT_SHA512:
 515                 method_string = CERTFP_PREFIX_CERT_SHA512;
 516                 break;
 517         case RB_SSL_CERTFP_METH_SPKI_SHA256:
 518                 method_string = CERTFP_PREFIX_SPKI_SHA256;
 519                 break;
 520         case RB_SSL_CERTFP_METH_SPKI_SHA512:
 521                 method_string = CERTFP_PREFIX_SPKI_SHA512;
 522                 break;
 523         default:
 524                 return;
 525         }
 526         method_len = strlen(method_string);
 527
 528         rb_free(client_p->certfp);
 529         certfp_string = rb_malloc(method_len + len * 2 + 1);
 530         rb_strlcpy(certfp_string, method_string, method_len + len * 2 + 1);
 531         for(uint32_t i = 0; i < len; i++)
 532                 snprintf(certfp_string + method_len + 2 * i, 3, "%02x",
 533                                 certfp[i]);
 534         client_p->certfp = certfp_string;
 535 }
 536
 537 static void
 538 ssl_process_cmd_recv(ssl_ctl_t * ctl)
 539 {
 540         static const char *cannot_setup_ssl = "ssld cannot setup ssl, check your certificates and private key";
 541         static const char *no_ssl_or_zlib = "ssld has neither SSL/TLS or zlib support killing all sslds";
 542         rb_dlink_node *ptr, *next;
 543         ssl_ctl_buf_t *ctl_buf;
 544         unsigned long len;
 545
 546         if(ctl->dead)
 547                 return;
 548
 549         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head)
 550         {
 551                 ctl_buf = ptr->data;
 552                 switch (*ctl_buf->buf)
 553                 {
 554                 case 'N':
 555                         ircd_ssl_ok = false;    /* ssld says it can't do ssl/tls */
 556                         break;
 557                 case 'O':
 558                         ssl_process_open_fd(ctl, ctl_buf);
 559                         break;
 560                 case 'D':
 561                         ssl_process_dead_fd(ctl, ctl_buf);
 562                         break;
 563                 case 'C':
 564                         ssl_process_cipher_string(ctl, ctl_buf);
 565                         break;
 566                 case 'F':
 567                         ssl_process_certfp(ctl, ctl_buf);
 568                         break;
 569                 case 'S':
 570                         ssl_process_zipstats(ctl, ctl_buf);
 571                         break;
 572                 case 'I':
 573                         ircd_ssl_ok = false;
 574                         ilog(L_MAIN, "%s", cannot_setup_ssl);
 575                         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "%s", cannot_setup_ssl);
 576                         break;
 577                 case 'U':
 578                         ircd_zlib_ok = 0;
 579                         ircd_ssl_ok = false;
 580                         ilog(L_MAIN, "%s", no_ssl_or_zlib);
 581                         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "%s", no_ssl_or_zlib);
 582                         ssl_killall();
 583                         return;
 584                 case 'V':
 585                         len = ctl_buf->buflen - 1;
 586                         if (len > sizeof(ctl->version) - 1)
 587                                 len = sizeof(ctl->version) - 1;
 588                         strncpy(ctl->version, &ctl_buf->buf[1], len);
 589                 case 'z':
 590                         ircd_zlib_ok = 0;
 591                         break;
 592                 default:
 593                         ilog(L_MAIN, "Received invalid command from ssld: %s", ctl_buf->buf);
 594                         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Received invalid command from ssld");
 595                         break;
 596                 }
 597                 rb_dlinkDelete(ptr, &ctl->readq);
 598                 rb_free(ctl_buf->buf);
 599                 rb_free(ctl_buf);
 600         }
 601
 602 }
 603
 604
 605 static void
 606 ssl_read_ctl(rb_fde_t * F, void *data)
 607 {
 608         ssl_ctl_buf_t *ctl_buf;
 609         ssl_ctl_t *ctl = data;
 610         int retlen;
 611
 612         if(ctl->dead)
 613                 return;
 614         do
 615         {
 616                 ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 617                 ctl_buf->buf = rb_malloc(READSIZE);
 618                 retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, READSIZE, ctl_buf->F, 4);
 619                 ctl_buf->buflen = retlen;
 620                 if(retlen <= 0)
 621                 {
 622                         rb_free(ctl_buf->buf);
 623                         rb_free(ctl_buf);
 624                 }
 625                 else
 626                         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq);
 627         }
 628         while(retlen > 0);
 629
 630         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 631         {
 632                 ssl_dead(ctl);
 633                 return;
 634         }
 635         ssl_process_cmd_recv(ctl);
 636         rb_setselect(ctl->F, RB_SELECT_READ, ssl_read_ctl, ctl);
 637 }
 638
 639 static ssl_ctl_t *
 640 which_ssld(void)
 641 {
 642         ssl_ctl_t *ctl, *lowest = NULL;
 643         rb_dlink_node *ptr;
 644
 645         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 646         {
 647                 ctl = ptr->data;
 648                 if(ctl->dead)
 649                         continue;
 650                 if(ctl->shutdown)
 651                         continue;
 652                 if(lowest == NULL)
 653                 {
 654                         lowest = ctl;
 655                         continue;
 656                 }
 657                 if(ctl->cli_count < lowest->cli_count)
 658                         lowest = ctl;
 659         }
 660         return (lowest);
 661 }
 662
 663 static void
 664 ssl_write_ctl(rb_fde_t * F, void *data)
 665 {
 666         ssl_ctl_t *ctl = data;
 667         ssl_ctl_buf_t *ctl_buf;
 668         rb_dlink_node *ptr, *next;
 669         int retlen, x;
 670
 671         if(ctl->dead)
 672                 return;
 673
 674         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
 675         {
 676                 ctl_buf = ptr->data;
 677                 /* in theory unix sock_dgram shouldn't ever short write this.. */
 678                 retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, ctl_buf->buflen, ctl->pid);
 679                 if(retlen > 0)
 680                 {
 681                         rb_dlinkDelete(ptr, &ctl->writeq);
 682                         for(x = 0; x < ctl_buf->nfds; x++)
 683                                 rb_close(ctl_buf->F[x]);
 684                         rb_free(ctl_buf->buf);
 685                         rb_free(ctl_buf);
 686
 687                 }
 688                 if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 689                 {
 690                         ssl_dead(ctl);
 691                         return;
 692                 }
 693                 else
 694                 {
 695                         rb_setselect(ctl->F, RB_SELECT_WRITE, ssl_write_ctl, ctl);
 696                 }
 697         }
 698 }
 699
 700 static void
 701 ssl_cmd_write_queue(ssl_ctl_t * ctl, rb_fde_t ** F, int count, const void *buf, size_t buflen)
 702 {
 703         ssl_ctl_buf_t *ctl_buf;
 704         int x;
 705
 706         /* don't bother */
 707         if(ctl->dead)
 708                 return;
 709
 710         ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 711         ctl_buf->buf = rb_malloc(buflen);
 712         memcpy(ctl_buf->buf, buf, buflen);
 713         ctl_buf->buflen = buflen;
 714
 715         for(x = 0; x < count && x < MAXPASSFD; x++)
 716         {
 717                 ctl_buf->F[x] = F[x];
 718         }
 719         ctl_buf->nfds = count;
 720         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq);
 721         ssl_write_ctl(ctl->F, ctl);
 722 }
 723
 724
 725 static void
 726 send_new_ssl_certs_one(ssl_ctl_t * ctl)
 727 {
 728         size_t len = 5;
 729
 730         if(ServerInfo.ssl_cert)
 731                 len += strlen(ServerInfo.ssl_cert);
 732         else
 733                 return;
 734
 735         if(ServerInfo.ssl_private_key)
 736                 len += strlen(ServerInfo.ssl_private_key);
 737
 738         if(ServerInfo.ssl_dh_params)
 739                 len += strlen(ServerInfo.ssl_dh_params);
 740
 741         if(ServerInfo.ssl_cipher_list)
 742                 len += strlen(ServerInfo.ssl_cipher_list);
 743
 744         if(len > sizeof(tmpbuf))
 745         {
 746                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
 747                                        "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 748                                        len, sizeof(tmpbuf));
 749                 ilog(L_MAIN,
 750                      "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 751                      len, sizeof(tmpbuf));
 752                 return;
 753         }
 754
 755         int ret = snprintf(tmpbuf, sizeof(tmpbuf), "K%c%s%c%s%c%s%c%s%c", nul,
 756                            ServerInfo.ssl_cert, nul,
 757                            ServerInfo.ssl_private_key != NULL ? ServerInfo.ssl_private_key : "", nul,
 758                            ServerInfo.ssl_dh_params != NULL ? ServerInfo.ssl_dh_params : "", nul,
 759                            ServerInfo.ssl_cipher_list != NULL ? ServerInfo.ssl_cipher_list : "", nul);
 760
 761         if(ret > 5)
 762                 ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, (size_t) ret);
 763 }
 764
 765 static void
 766 send_certfp_method(ssl_ctl_t *ctl)
 767 {
 768         char buf[5];
 769
 770         buf[0] = 'F';
 771         uint32_to_buf(&buf[1], ConfigFileEntry.certfp_method);
 772         ssl_cmd_write_queue(ctl, NULL, 0, buf, sizeof(buf));
 773 }
 774
 775 static void
 776 ssld_update_config_one(ssl_ctl_t *ctl)
 777 {
 778         send_certfp_method(ctl);
 779         send_new_ssl_certs_one(ctl);
 780 }
 781
 782 void
 783 ssld_update_config(void)
 784 {
 785         rb_dlink_node *ptr;
 786
 787         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 788         {
 789                 ssl_ctl_t *ctl = ptr->data;
 790
 791                 if (ctl->dead || ctl->shutdown)
 792                         continue;
 793
 794                 ssld_update_config_one(ctl);
 795         }
 796 }
 797
 798 ssl_ctl_t *
 799 start_ssld_accept(rb_fde_t * sslF, rb_fde_t * plainF, uint32_t id)
 800 {
 801         rb_fde_t *F[2];
 802         ssl_ctl_t *ctl;
 803         char buf[5];
 804         F[0] = sslF;
 805         F[1] = plainF;
 806
 807         buf[0] = 'A';
 808         uint32_to_buf(&buf[1], id);
 809         ctl = which_ssld();
 810         if(!ctl)
 811                 return NULL;
 812         ctl->cli_count++;
 813         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 814         return ctl;
 815 }
 816
 817 ssl_ctl_t *
 818 start_ssld_connect(rb_fde_t * sslF, rb_fde_t * plainF, uint32_t id)
 819 {
 820         rb_fde_t *F[2];
 821         ssl_ctl_t *ctl;
 822         char buf[5];
 823         F[0] = sslF;
 824         F[1] = plainF;
 825
 826         buf[0] = 'C';
 827         uint32_to_buf(&buf[1], id);
 828
 829         ctl = which_ssld();
 830         if(!ctl)
 831                 return NULL;
 832         ctl->cli_count++;
 833         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 834         return ctl;
 835 }
 836
 837 void
 838 ssld_decrement_clicount(ssl_ctl_t * ctl)
 839 {
 840         if(ctl == NULL)
 841                 return;
 842
 843         ctl->cli_count--;
 844         if(ctl->shutdown && !ctl->cli_count)
 845         {
 846                 ctl->dead = 1;
 847                 rb_kill(ctl->pid, SIGKILL);
 848         }
 849         if(ctl->dead && !ctl->cli_count)
 850         {
 851                 free_ssl_daemon(ctl);
 852         }
 853 }
 854
 855 /*
 856  * what we end up sending to the ssld process for ziplinks is the following
 857  * Z[ourfd][level][RECVQ]
 858  * Z = ziplinks command = buf[0]
 859  * ourfd = Our end of the socketpair = buf[1..4]
 860  * level = zip level buf[5]
 861  * recvqlen = our recvq len = buf[6-7]
 862  * recvq = any data we read prior to starting ziplinks
 863  */
 864 void
 865 start_zlib_session(void *data)
 866 {
 867         struct Client *server = (struct Client *) data;
 868         uint16_t recvqlen;
 869         uint8_t level;
 870         void *xbuf;
 871
 872         rb_fde_t *F[2];
 873         rb_fde_t *xF1, *xF2;
 874         char *buf;
 875         void *recvq_start;
 876
 877         size_t hdr = (sizeof(uint8_t) * 2) + sizeof(uint32_t);
 878         size_t len;
 879         int cpylen, left;
 880
 881         server->localClient->event = NULL;
 882
 883         recvqlen = rb_linebuf_len(&server->localClient->buf_recvq);
 884
 885         len = recvqlen + hdr;
 886
 887         if(len > READBUF_SIZE)
 888         {
 889                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
 890                                        "ssld - attempted to pass message of %zd len, max len %d, giving up",
 891                                        len, READBUF_SIZE);
 892                 ilog(L_MAIN, "ssld - attempted to pass message of %zd len, max len %d, giving up", len, READBUF_SIZE);
 893                 exit_client(server, server, server, "ssld readbuf exceeded");
 894                 return;
 895         }
 896
 897         buf = rb_malloc(len);
 898         level = ConfigFileEntry.compression_level;
 899
 900         uint32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 901         buf[5] = (char) level;
 902
 903         recvq_start = &buf[6];
 904         server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 905
 906         xbuf = recvq_start;
 907         left = recvqlen;
 908
 909         do
 910         {
 911                 cpylen = rb_linebuf_get(&server->localClient->buf_recvq, xbuf, left, LINEBUF_PARTIAL, LINEBUF_RAW);
 912                 left -= cpylen;
 913                 xbuf = (void *) (((uintptr_t) xbuf) + cpylen);
 914         }
 915         while(cpylen > 0);
 916
 917         /* Pass the socket to ssld. */
 918         *buf = 'Z';
 919         if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF1, &xF2, "Initial zlib socketpairs") == -1)
 920         {
 921                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Error creating zlib socketpair - %s", strerror(errno));
 922                 ilog(L_MAIN, "Error creating zlib socketpairs - %s", strerror(errno));
 923                 exit_client(server, server, server, "Error creating zlib socketpair");
 924                 rb_free(buf);
 925                 return;
 926         }
 927
 928         F[0] = server->localClient->F;
 929         F[1] = xF1;
 930         server->localClient->F = xF2;
 931         /* need to redo as what we did before isn't valid now */
 932         uint32_to_buf(&buf[1], connid_get(server));
 933
 934         server->localClient->z_ctl = which_ssld();
 935         if(!server->localClient->z_ctl)
 936         {
 937                 exit_client(server, server, server, "Error finding available ssld");
 938                 rb_free(buf);
 939                 return;
 940         }
 941         server->localClient->z_ctl->cli_count++;
 942         ssl_cmd_write_queue(server->localClient->z_ctl, F, 2, buf, len);
 943         rb_free(buf);
 944 }
 945
 946 static void
 947 collect_zipstats(void *unused)
 948 {
 949         rb_dlink_node *ptr;
 950         struct Client *target_p;
 951         char buf[sizeof(uint8_t) + sizeof(uint32_t) + HOSTLEN];
 952         void *odata;
 953         size_t len;
 954         uint32_t id;
 955
 956         buf[0] = 'S';
 957         odata = buf + sizeof(uint8_t) + sizeof(uint32_t);
 958
 959         RB_DLINK_FOREACH(ptr, serv_list.head)
 960         {
 961                 target_p = ptr->data;
 962                 if(IsCapable(target_p, CAP_ZIP))
 963                 {
 964                         len = sizeof(uint8_t) + sizeof(uint32_t);
 965
 966                         id = rb_get_fd(target_p->localClient->F);
 967                         uint32_to_buf(&buf[1], id);
 968                         rb_strlcpy(odata, target_p->name, (sizeof(buf) - len));
 969                         len += strlen(odata) + 1;       /* Get the \0 as well */
 970                         ssl_cmd_write_queue(target_p->localClient->z_ctl, NULL, 0, buf, len);
 971                 }
 972         }
 973 }
 974
 975 static void
 976 cleanup_dead_ssl(void *unused)
 977 {
 978         rb_dlink_node *ptr, *next;
 979         ssl_ctl_t *ctl;
 980         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 981         {
 982                 ctl = ptr->data;
 983                 if(ctl->dead && !ctl->cli_count)
 984                 {
 985                         free_ssl_daemon(ctl);
 986                 }
 987         }
 988 }
 989
 990 int
 991 get_ssld_count(void)
 992 {
 993         return ssld_count;
 994 }
 995
 996 void
 997 ssld_foreach_info(void (*func)(void *data, pid_t pid, int cli_count, enum ssld_status status, const char *version), void *data)
 998 {
 999         rb_dlink_node *ptr, *next;
1000         ssl_ctl_t *ctl;
1001         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
1002         {
1003                 ctl = ptr->data;
1004                 func(data, ctl->pid, ctl->cli_count,
1005                         ctl->dead ? SSLD_DEAD :
1006                                 (ctl->shutdown ? SSLD_SHUTDOWN : SSLD_ACTIVE),
1007                         ctl->version);
1008         }
1009 }
1010
1011 void
1012 init_ssld(void)
1013 {
1014         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
1015         rb_event_addish("cleanup_dead_ssld", cleanup_dead_ssl, NULL, 60);
1016 }