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
  37 #define ZIPSTATS_TIME           60
  38
  39 static void collect_zipstats(void *unused);
  40 static void ssl_read_ctl(rb_fde_t * F, void *data);
  41 static int ssld_count;
  42
  43 static char tmpbuf[READBUF_SIZE];
  44 static char nul = '\0';
  45
  46 #define MAXPASSFD 4
  47 #define READSIZE 1024
  48 typedef struct _ssl_ctl_buf
  49 {
  50         rb_dlink_node node;
  51         char *buf;
  52         size_t buflen;
  53         rb_fde_t *F[MAXPASSFD];
  54         int nfds;
  55 } ssl_ctl_buf_t;
  56
  57
  58 struct _ssl_ctl
  59 {
  60         rb_dlink_node node;
  61         int cli_count;
  62         rb_fde_t *F;
  63         rb_fde_t *P;
  64         pid_t pid;
  65         rb_dlink_list readq;
  66         rb_dlink_list writeq;
  67         uint8_t shutdown;
  68         uint8_t dead;
  69         char version[256];
  70 };
  71
  72 static void send_new_ssl_certs_one(ssl_ctl_t * ctl, const char *ssl_cert,
  73                                    const char *ssl_private_key, const char *ssl_dh_params,
  74                                    const char *ssl_cipher_list);
  75 static void send_init_prng(ssl_ctl_t * ctl, prng_seed_t seedtype, const char *path);
  76 static void send_certfp_method(ssl_ctl_t *ctl, int method);
  77
  78
  79 static rb_dlink_list ssl_daemons;
  80
  81 static inline uint32_t
  82 buf_to_uint32(char *buf)
  83 {
  84         uint32_t x;
  85         memcpy(&x, buf, sizeof(x));
  86         return x;
  87 }
  88
  89 static inline void
  90 uint32_to_buf(char *buf, uint32_t x)
  91 {
  92         memcpy(buf, &x, sizeof(x));
  93         return;
  94 }
  95
  96 static ssl_ctl_t *
  97 allocate_ssl_daemon(rb_fde_t * F, rb_fde_t * P, int pid)
  98 {
  99         ssl_ctl_t *ctl;
 100
 101         if(F == NULL || pid < 0)
 102                 return NULL;
 103         ctl = rb_malloc(sizeof(ssl_ctl_t));
 104         ctl->F = F;
 105         ctl->P = P;
 106         ctl->pid = pid;
 107         ssld_count++;
 108         rb_dlinkAdd(ctl, &ctl->node, &ssl_daemons);
 109         return ctl;
 110 }
 111
 112 static void
 113 free_ssl_daemon(ssl_ctl_t * ctl)
 114 {
 115         rb_dlink_node *ptr;
 116         ssl_ctl_buf_t *ctl_buf;
 117         int x;
 118         if(ctl->cli_count)
 119                 return;
 120
 121         RB_DLINK_FOREACH(ptr, ctl->readq.head)
 122         {
 123                 ctl_buf = ptr->data;
 124                 for(x = 0; x < ctl_buf->nfds; x++)
 125                         rb_close(ctl_buf->F[x]);
 126
 127                 rb_free(ctl_buf->buf);
 128                 rb_free(ctl_buf);
 129         }
 130
 131         RB_DLINK_FOREACH(ptr, ctl->writeq.head)
 132         {
 133                 ctl_buf = ptr->data;
 134                 for(x = 0; x < ctl_buf->nfds; x++)
 135                         rb_close(ctl_buf->F[x]);
 136
 137                 rb_free(ctl_buf->buf);
 138                 rb_free(ctl_buf);
 139         }
 140         rb_close(ctl->F);
 141         rb_close(ctl->P);
 142         rb_dlinkDelete(&ctl->node, &ssl_daemons);
 143         rb_free(ctl);
 144 }
 145
 146 static char *ssld_path;
 147
 148 static int ssld_spin_count = 0;
 149 static time_t last_spin;
 150 static int ssld_wait = 0;
 151
 152
 153 void
 154 restart_ssld(void)
 155 {
 156         rb_dlink_node *ptr, *next;
 157         ssl_ctl_t *ctl;
 158
 159         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 160         {
 161                 ctl = ptr->data;
 162                 if(ctl->dead)
 163                         continue;
 164                 if(ctl->shutdown)
 165                         continue;
 166                 ctl->shutdown = 1;
 167                 ssld_count--;
 168                 if(!ctl->cli_count)
 169                 {
 170                         rb_kill(ctl->pid, SIGKILL);
 171                         free_ssl_daemon(ctl);
 172                 }
 173         }
 174
 175         start_ssldaemon(ServerInfo.ssld_count, ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params, ServerInfo.ssl_cipher_list);
 176 }
 177
 178 static void
 179 ssl_killall(void)
 180 {
 181         rb_dlink_node *ptr, *next;
 182         ssl_ctl_t *ctl;
 183         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 184         {
 185                 ctl = ptr->data;
 186                 if(ctl->dead)
 187                         continue;
 188                 ctl->dead = 1;
 189                 if(!ctl->shutdown)
 190                         ssld_count--;
 191                 rb_kill(ctl->pid, SIGKILL);
 192                 if(!ctl->cli_count)
 193                         free_ssl_daemon(ctl);
 194         }
 195 }
 196
 197 static void
 198 ssl_dead(ssl_ctl_t * ctl)
 199 {
 200         if(ctl->dead)
 201                 return;
 202
 203         ctl->dead = 1;
 204         rb_kill(ctl->pid, SIGKILL);     /* make sure the process is really gone */
 205
 206         if(!ctl->shutdown)
 207         {
 208                 ssld_count--;
 209                 ilog(L_MAIN, "ssld helper died - attempting to restart");
 210                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "ssld helper died - attempting to restart");
 211                 start_ssldaemon(1, ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params, ServerInfo.ssl_cipher_list);
 212         }
 213 }
 214
 215 static void
 216 ssl_do_pipe(rb_fde_t * F, void *data)
 217 {
 218         int retlen;
 219         ssl_ctl_t *ctl = data;
 220         retlen = rb_write(F, "0", 1);
 221         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 222         {
 223                 ssl_dead(ctl);
 224                 return;
 225         }
 226         rb_setselect(F, RB_SELECT_READ, ssl_do_pipe, data);
 227 }
 228
 229 static void
 230 restart_ssld_event(void *unused)
 231 {
 232         ssld_spin_count = 0;
 233         last_spin = 0;
 234         ssld_wait = 0;
 235         if(ServerInfo.ssld_count > get_ssld_count())
 236         {
 237                 int start = ServerInfo.ssld_count - get_ssld_count();
 238                 ilog(L_MAIN, "Attempting to restart ssld processes");
 239                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Attempt to restart ssld processes");
 240                 start_ssldaemon(start, ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params, ServerInfo.ssl_cipher_list);
 241         }
 242 }
 243
 244 int
 245 start_ssldaemon(int count, const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params, const char *ssl_cipher_list)
 246 {
 247         rb_fde_t *F1, *F2;
 248         rb_fde_t *P1, *P2;
 249 #ifdef _WIN32
 250         const char *suffix = ".exe";
 251 #else
 252         const char *suffix = "";
 253 #endif
 254
 255         char fullpath[PATH_MAX + 1];
 256         char fdarg[6];
 257         const char *parv[2];
 258         char buf[128];
 259         char s_pid[10];
 260         pid_t pid;
 261         int started = 0, i;
 262
 263         if(ssld_wait)
 264                 return 0;
 265
 266         if(ssld_spin_count > 20 && (rb_current_time() - last_spin < 5))
 267         {
 268                 ilog(L_MAIN, "ssld helper is spinning - will attempt to restart in 1 minute");
 269                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 270                                        "ssld helper is spinning - will attempt to restart in 1 minute");
 271                 rb_event_add("restart_ssld_event", restart_ssld_event, NULL, 60);
 272                 ssld_wait = 1;
 273                 return 0;
 274         }
 275
 276         ssld_spin_count++;
 277         last_spin = rb_current_time();
 278
 279         if(ssld_path == NULL)
 280         {
 281                 snprintf(fullpath, sizeof(fullpath), "%s%cssld%s", ircd_paths[IRCD_PATH_LIBEXEC], RB_PATH_SEPARATOR, suffix);
 282
 283                 if(access(fullpath, X_OK) == -1)
 284                 {
 285                         snprintf(fullpath, sizeof(fullpath), "%s%cbin%cssld%s",
 286                                     ConfigFileEntry.dpath, RB_PATH_SEPARATOR, RB_PATH_SEPARATOR, suffix);
 287                         if(access(fullpath, X_OK) == -1)
 288                         {
 289                                 ilog(L_MAIN,
 290                                      "Unable to execute ssld%s in %s or %s/bin",
 291                                      suffix, ircd_paths[IRCD_PATH_LIBEXEC], ConfigFileEntry.dpath);
 292                                 return 0;
 293                         }
 294                 }
 295                 ssld_path = rb_strdup(fullpath);
 296         }
 297         rb_strlcpy(buf, "-ircd ssld daemon", sizeof(buf));
 298         parv[0] = buf;
 299         parv[1] = NULL;
 300
 301         for(i = 0; i < count; i++)
 302         {
 303                 ssl_ctl_t *ctl;
 304                 if(rb_socketpair(AF_UNIX, SOCK_DGRAM, 0, &F1, &F2, "SSL/TLS handle passing socket") == -1)
 305                 {
 306                         ilog(L_MAIN, "Unable to create ssld - rb_socketpair failed: %s", strerror(errno));
 307                         return started;
 308                 }
 309
 310                 rb_set_buffers(F1, READBUF_SIZE);
 311                 rb_set_buffers(F2, READBUF_SIZE);
 312                 snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(F2));
 313                 rb_setenv("CTL_FD", fdarg, 1);
 314                 if(rb_pipe(&P1, &P2, "SSL/TLS pipe") == -1)
 315                 {
 316                         ilog(L_MAIN, "Unable to create ssld - rb_pipe failed: %s", strerror(errno));
 317                         return started;
 318                 }
 319                 snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(P1));
 320                 rb_setenv("CTL_PIPE", fdarg, 1);
 321                 snprintf(s_pid, sizeof(s_pid), "%d", (int)getpid());
 322                 rb_setenv("CTL_PPID", s_pid, 1);
 323 #ifdef _WIN32
 324                 SetHandleInformation((HANDLE) rb_get_fd(F2), HANDLE_FLAG_INHERIT, 1);
 325                 SetHandleInformation((HANDLE) rb_get_fd(P1), HANDLE_FLAG_INHERIT, 1);
 326 #endif
 327
 328                 pid = rb_spawn_process(ssld_path, (const char **) parv);
 329                 if(pid == -1)
 330                 {
 331                         ilog(L_MAIN, "Unable to create ssld: %s\n", strerror(errno));
 332                         rb_close(F1);
 333                         rb_close(F2);
 334                         rb_close(P1);
 335                         rb_close(P2);
 336                         return started;
 337                 }
 338                 started++;
 339                 rb_close(F2);
 340                 rb_close(P1);
 341                 ctl = allocate_ssl_daemon(F1, P2, pid);
 342                 if(ircd_ssl_ok)
 343                 {
 344                         send_init_prng(ctl, RB_PRNG_DEFAULT, NULL);
 345                         send_certfp_method(ctl, ConfigFileEntry.certfp_method);
 346
 347                         if(ssl_cert != NULL && ssl_private_key != NULL)
 348                                 send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key,
 349                                                        ssl_dh_params != NULL ? ssl_dh_params : "",
 350                                                        ssl_cipher_list != NULL ? ssl_cipher_list : "");
 351                 }
 352                 ssl_read_ctl(ctl->F, ctl);
 353                 ssl_do_pipe(P2, ctl);
 354
 355         }
 356         return started;
 357 }
 358
 359 static void
 360 ssl_process_zipstats(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 361 {
 362         struct Client *server;
 363         struct ZipStats *zips;
 364         char *parv[7];
 365         (void) rb_string_to_array(ctl_buf->buf, parv, 6);
 366         server = find_server(NULL, parv[1]);
 367         if(server == NULL || server->localClient == NULL || !IsCapable(server, CAP_ZIP))
 368                 return;
 369         if(server->localClient->zipstats == NULL)
 370                 server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 371
 372         zips = server->localClient->zipstats;
 373
 374         zips->in += strtoull(parv[2], NULL, 10);
 375         zips->in_wire += strtoull(parv[3], NULL, 10);
 376         zips->out += strtoull(parv[4], NULL, 10);
 377         zips->out_wire += strtoull(parv[5], NULL, 10);
 378
 379         if(zips->in > 0)
 380                 zips->in_ratio = ((double) (zips->in - zips->in_wire) / (double) zips->in) * 100.00;
 381         else
 382                 zips->in_ratio = 0;
 383
 384         if(zips->out > 0)
 385                 zips->out_ratio = ((double) (zips->out - zips->out_wire) / (double) zips->out) * 100.00;
 386         else
 387                 zips->out_ratio = 0;
 388 }
 389
 390 static void
 391 ssl_process_dead_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 392 {
 393         struct Client *client_p;
 394         char reason[256];
 395         uint32_t fd;
 396
 397         if(ctl_buf->buflen < 6)
 398                 return;         /* bogus message..drop it.. XXX should warn here */
 399
 400         fd = buf_to_uint32(&ctl_buf->buf[1]);
 401         rb_strlcpy(reason, &ctl_buf->buf[5], sizeof(reason));
 402         client_p = find_cli_connid_hash(fd);
 403         if(client_p == NULL)
 404                 return;
 405         if(IsAnyServer(client_p) || IsRegistered(client_p))
 406         {
 407                 /* read any last moment ERROR, QUIT or the like -- jilles */
 408                 if (!strcmp(reason, "Remote host closed the connection"))
 409                         read_packet(client_p->localClient->F, client_p);
 410                 if (IsAnyDead(client_p))
 411                         return;
 412         }
 413         if(IsAnyServer(client_p))
 414         {
 415                 sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) && !IsServer(client_p) ? L_NETWIDE : L_ALL, "ssld error for %s: %s", client_p->name, reason);
 416                 ilog(L_SERVER, "ssld error for %s: %s", log_client_name(client_p, SHOW_IP), reason);
 417         }
 418         exit_client(client_p, client_p, &me, reason);
 419 }
 420
 421
 422 static void
 423 ssl_process_cipher_string(ssl_ctl_t *ctl, ssl_ctl_buf_t *ctl_buf)
 424 {
 425         struct Client *client_p;
 426         const char *cstring;
 427         uint32_t fd;
 428
 429         if(ctl_buf->buflen < 6)
 430                 return;         /* bogus message..drop it.. XXX should warn here */
 431
 432         fd = buf_to_uint32(&ctl_buf->buf[1]);
 433         cstring = (const char *)&ctl_buf->buf[5];
 434
 435         if(EmptyString(cstring))
 436                 return;
 437
 438         client_p = find_cli_connid_hash(fd);
 439         if(client_p != NULL && client_p->localClient != NULL)
 440         {
 441                 rb_free(client_p->localClient->cipher_string);
 442                 client_p->localClient->cipher_string = rb_strdup(cstring);
 443         }
 444 }
 445
 446
 447 static void
 448 ssl_process_certfp(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 449 {
 450         struct Client *client_p;
 451         uint32_t fd;
 452         uint32_t len;
 453         uint8_t *certfp;
 454         char *certfp_string;
 455
 456         if(ctl_buf->buflen > 5 + RB_SSL_CERTFP_LEN)
 457                 return;         /* bogus message..drop it.. XXX should warn here */
 458
 459         fd = buf_to_uint32(&ctl_buf->buf[1]);
 460         len = buf_to_uint32(&ctl_buf->buf[5]);
 461         certfp = (uint8_t *)&ctl_buf->buf[9];
 462         client_p = find_cli_connid_hash(fd);
 463         if(client_p == NULL)
 464                 return;
 465         rb_free(client_p->certfp);
 466         certfp_string = rb_malloc(len * 2 + 1);
 467         for(uint32_t i = 0; i < len; i++)
 468                 snprintf(certfp_string + 2 * i, 3, "%02x",
 469                                 certfp[i]);
 470         client_p->certfp = certfp_string;
 471 }
 472
 473 static void
 474 ssl_process_cmd_recv(ssl_ctl_t * ctl)
 475 {
 476         static const char *cannot_setup_ssl = "ssld cannot setup ssl, check your certificates and private key";
 477         static const char *no_ssl_or_zlib = "ssld has neither SSL/TLS or zlib support killing all sslds";
 478         rb_dlink_node *ptr, *next;
 479         ssl_ctl_buf_t *ctl_buf;
 480         unsigned long len;
 481
 482         if(ctl->dead)
 483                 return;
 484
 485         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head)
 486         {
 487                 ctl_buf = ptr->data;
 488                 switch (*ctl_buf->buf)
 489                 {
 490                 case 'N':
 491                         ircd_ssl_ok = false;    /* ssld says it can't do ssl/tls */
 492                         break;
 493                 case 'D':
 494                         ssl_process_dead_fd(ctl, ctl_buf);
 495                         break;
 496                 case 'C':
 497                         ssl_process_cipher_string(ctl, ctl_buf);
 498                         break;
 499                 case 'F':
 500                         ssl_process_certfp(ctl, ctl_buf);
 501                         break;
 502                 case 'S':
 503                         ssl_process_zipstats(ctl, ctl_buf);
 504                         break;
 505                 case 'I':
 506                         ircd_ssl_ok = false;
 507                         ilog(L_MAIN, "%s", cannot_setup_ssl);
 508                         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s", cannot_setup_ssl);
 509                         break;
 510                 case 'U':
 511                         ircd_zlib_ok = 0;
 512                         ircd_ssl_ok = false;
 513                         ilog(L_MAIN, "%s", no_ssl_or_zlib);
 514                         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s", no_ssl_or_zlib);
 515                         ssl_killall();
 516                         return;
 517                 case 'V':
 518                         len = ctl_buf->buflen - 1;
 519                         if (len > sizeof(ctl->version) - 1)
 520                                 len = sizeof(ctl->version) - 1;
 521                         strncpy(ctl->version, &ctl_buf->buf[1], len);
 522                 case 'z':
 523                         ircd_zlib_ok = 0;
 524                         break;
 525                 default:
 526                         ilog(L_MAIN, "Received invalid command from ssld: %s", ctl_buf->buf);
 527                         sendto_realops_snomask(SNO_GENERAL, L_ALL, "Received invalid command from ssld");
 528                         break;
 529                 }
 530                 rb_dlinkDelete(ptr, &ctl->readq);
 531                 rb_free(ctl_buf->buf);
 532                 rb_free(ctl_buf);
 533         }
 534
 535 }
 536
 537
 538 static void
 539 ssl_read_ctl(rb_fde_t * F, void *data)
 540 {
 541         ssl_ctl_buf_t *ctl_buf;
 542         ssl_ctl_t *ctl = data;
 543         int retlen;
 544
 545         if(ctl->dead)
 546                 return;
 547         do
 548         {
 549                 ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 550                 ctl_buf->buf = rb_malloc(READSIZE);
 551                 retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, READSIZE, ctl_buf->F, 4);
 552                 ctl_buf->buflen = retlen;
 553                 if(retlen <= 0)
 554                 {
 555                         rb_free(ctl_buf->buf);
 556                         rb_free(ctl_buf);
 557                 }
 558                 else
 559                         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq);
 560         }
 561         while(retlen > 0);
 562
 563         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 564         {
 565                 ssl_dead(ctl);
 566                 return;
 567         }
 568         ssl_process_cmd_recv(ctl);
 569         rb_setselect(ctl->F, RB_SELECT_READ, ssl_read_ctl, ctl);
 570 }
 571
 572 static ssl_ctl_t *
 573 which_ssld(void)
 574 {
 575         ssl_ctl_t *ctl, *lowest = NULL;
 576         rb_dlink_node *ptr;
 577
 578         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 579         {
 580                 ctl = ptr->data;
 581                 if(ctl->dead)
 582                         continue;
 583                 if(ctl->shutdown)
 584                         continue;
 585                 if(lowest == NULL)
 586                 {
 587                         lowest = ctl;
 588                         continue;
 589                 }
 590                 if(ctl->cli_count < lowest->cli_count)
 591                         lowest = ctl;
 592         }
 593         return (lowest);
 594 }
 595
 596 static void
 597 ssl_write_ctl(rb_fde_t * F, void *data)
 598 {
 599         ssl_ctl_t *ctl = data;
 600         ssl_ctl_buf_t *ctl_buf;
 601         rb_dlink_node *ptr, *next;
 602         int retlen, x;
 603
 604         if(ctl->dead)
 605                 return;
 606
 607         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
 608         {
 609                 ctl_buf = ptr->data;
 610                 /* in theory unix sock_dgram shouldn't ever short write this.. */
 611                 retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, ctl_buf->buflen, ctl->pid);
 612                 if(retlen > 0)
 613                 {
 614                         rb_dlinkDelete(ptr, &ctl->writeq);
 615                         for(x = 0; x < ctl_buf->nfds; x++)
 616                                 rb_close(ctl_buf->F[x]);
 617                         rb_free(ctl_buf->buf);
 618                         rb_free(ctl_buf);
 619
 620                 }
 621                 if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 622                 {
 623                         ssl_dead(ctl);
 624                         return;
 625                 }
 626                 else
 627                 {
 628                         rb_setselect(ctl->F, RB_SELECT_WRITE, ssl_write_ctl, ctl);
 629                 }
 630         }
 631 }
 632
 633 static void
 634 ssl_cmd_write_queue(ssl_ctl_t * ctl, rb_fde_t ** F, int count, const void *buf, size_t buflen)
 635 {
 636         ssl_ctl_buf_t *ctl_buf;
 637         int x;
 638
 639         /* don't bother */
 640         if(ctl->dead)
 641                 return;
 642
 643         ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 644         ctl_buf->buf = rb_malloc(buflen);
 645         memcpy(ctl_buf->buf, buf, buflen);
 646         ctl_buf->buflen = buflen;
 647
 648         for(x = 0; x < count && x < MAXPASSFD; x++)
 649         {
 650                 ctl_buf->F[x] = F[x];
 651         }
 652         ctl_buf->nfds = count;
 653         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq);
 654         ssl_write_ctl(ctl->F, ctl);
 655 }
 656
 657
 658 static void
 659 send_new_ssl_certs_one(ssl_ctl_t * ctl, const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params, const char *ssl_cipher_list)
 660 {
 661         size_t len;
 662
 663         len = strlen(ssl_cert) + strlen(ssl_private_key) + strlen(ssl_dh_params) + 5;
 664         if(len > sizeof(tmpbuf))
 665         {
 666                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 667                                        "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 668                                        len, sizeof(tmpbuf));
 669                 ilog(L_MAIN,
 670                      "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 671                      len, sizeof(tmpbuf));
 672                 return;
 673         }
 674         len = snprintf(tmpbuf, sizeof(tmpbuf), "K%c%s%c%s%c%s%c%s%c", nul, ssl_cert, nul,
 675                           ssl_private_key, nul, ssl_dh_params, nul,
 676                           ssl_cipher_list != NULL ? ssl_cipher_list : "", nul);
 677         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 678 }
 679
 680 static void
 681 send_init_prng(ssl_ctl_t * ctl, prng_seed_t seedtype, const char *path)
 682 {
 683         size_t len;
 684         const char *s;
 685         uint8_t seed = (uint8_t) seedtype;
 686
 687         if(path == NULL)
 688                 s = "";
 689         else
 690                 s = path;
 691
 692         len = strlen(s) + 3;
 693         if(len > sizeof(tmpbuf))
 694         {
 695                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 696                                        "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 697                                        len, sizeof(tmpbuf));
 698                 ilog(L_MAIN,
 699                      "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 700                      len, sizeof(tmpbuf));
 701                 return;
 702
 703         }
 704         len = snprintf(tmpbuf, sizeof(tmpbuf), "I%c%s%c", seed, s, nul);
 705         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 706 }
 707
 708 static void
 709 send_certfp_method(ssl_ctl_t *ctl, int method)
 710 {
 711         char buf[5];
 712
 713         buf[0] = 'F';
 714         uint32_to_buf(&buf[1], method);
 715         ssl_cmd_write_queue(ctl, NULL, 0, buf, sizeof(buf));
 716 }
 717
 718 void
 719 send_new_ssl_certs(const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params, const char *ssl_cipher_list)
 720 {
 721         rb_dlink_node *ptr;
 722         if(ssl_cert == NULL || ssl_private_key == NULL || ssl_dh_params == NULL)
 723         {
 724                 ircd_ssl_ok = false;
 725                 return;
 726         }
 727         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 728         {
 729                 ssl_ctl_t *ctl = ptr->data;
 730                 send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key, ssl_dh_params, ssl_cipher_list);
 731         }
 732 }
 733
 734
 735 ssl_ctl_t *
 736 start_ssld_accept(rb_fde_t * sslF, rb_fde_t * plainF, uint32_t id)
 737 {
 738         rb_fde_t *F[2];
 739         ssl_ctl_t *ctl;
 740         char buf[5];
 741         F[0] = sslF;
 742         F[1] = plainF;
 743
 744         buf[0] = 'A';
 745         uint32_to_buf(&buf[1], id);
 746         ctl = which_ssld();
 747         if(!ctl)
 748                 return NULL;
 749         ctl->cli_count++;
 750         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 751         return ctl;
 752 }
 753
 754 ssl_ctl_t *
 755 start_ssld_connect(rb_fde_t * sslF, rb_fde_t * plainF, uint32_t id)
 756 {
 757         rb_fde_t *F[2];
 758         ssl_ctl_t *ctl;
 759         char buf[5];
 760         F[0] = sslF;
 761         F[1] = plainF;
 762
 763         buf[0] = 'C';
 764         uint32_to_buf(&buf[1], id);
 765
 766         ctl = which_ssld();
 767         if(!ctl)
 768                 return NULL;
 769         ctl->cli_count++;
 770         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 771         return ctl;
 772 }
 773
 774 void
 775 ssld_decrement_clicount(ssl_ctl_t * ctl)
 776 {
 777         if(ctl == NULL)
 778                 return;
 779
 780         ctl->cli_count--;
 781         if(ctl->shutdown && !ctl->cli_count)
 782         {
 783                 ctl->dead = 1;
 784                 rb_kill(ctl->pid, SIGKILL);
 785         }
 786         if(ctl->dead && !ctl->cli_count)
 787         {
 788                 free_ssl_daemon(ctl);
 789         }
 790 }
 791
 792 /*
 793  * what we end up sending to the ssld process for ziplinks is the following
 794  * Z[ourfd][level][RECVQ]
 795  * Z = ziplinks command = buf[0]
 796  * ourfd = Our end of the socketpair = buf[1..4]
 797  * level = zip level buf[5]
 798  * recvqlen = our recvq len = buf[6-7]
 799  * recvq = any data we read prior to starting ziplinks
 800  */
 801 void
 802 start_zlib_session(void *data)
 803 {
 804         struct Client *server = (struct Client *) data;
 805         uint16_t recvqlen;
 806         uint8_t level;
 807         void *xbuf;
 808
 809         rb_fde_t *F[2];
 810         rb_fde_t *xF1, *xF2;
 811         char *buf;
 812         char buf2[9];
 813         void *recvq_start;
 814
 815         size_t hdr = (sizeof(uint8_t) * 2) + sizeof(uint32_t);
 816         size_t len;
 817         int cpylen, left;
 818
 819         server->localClient->event = NULL;
 820
 821         recvqlen = rb_linebuf_len(&server->localClient->buf_recvq);
 822
 823         len = recvqlen + hdr;
 824
 825         if(len > READBUF_SIZE)
 826         {
 827                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 828                                        "ssld - attempted to pass message of %zd len, max len %d, giving up",
 829                                        len, READBUF_SIZE);
 830                 ilog(L_MAIN, "ssld - attempted to pass message of %zd len, max len %d, giving up", len, READBUF_SIZE);
 831                 exit_client(server, server, server, "ssld readbuf exceeded");
 832                 return;
 833         }
 834
 835         buf = rb_malloc(len);
 836         level = ConfigFileEntry.compression_level;
 837
 838         uint32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 839         buf[5] = (char) level;
 840
 841         recvq_start = &buf[6];
 842         server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 843
 844         xbuf = recvq_start;
 845         left = recvqlen;
 846
 847         do
 848         {
 849                 cpylen = rb_linebuf_get(&server->localClient->buf_recvq, xbuf, left, LINEBUF_PARTIAL, LINEBUF_RAW);
 850                 left -= cpylen;
 851                 xbuf = (void *) (((uintptr_t) xbuf) + cpylen);
 852         }
 853         while(cpylen > 0);
 854
 855         /* Pass the socket to ssld. */
 856         *buf = 'Z';
 857         if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF1, &xF2, "Initial zlib socketpairs") == -1)
 858         {
 859                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Error creating zlib socketpair - %s", strerror(errno));
 860                 ilog(L_MAIN, "Error creating zlib socketpairs - %s", strerror(errno));
 861                 exit_client(server, server, server, "Error creating zlib socketpair");
 862                 rb_free(buf);
 863                 return;
 864         }
 865
 866         if(IsSSL(server))
 867         {
 868                 /* tell ssld the new connid for the ssl part*/
 869                 buf2[0] = 'Y';
 870                 uint32_to_buf(&buf2[1], rb_get_fd(server->localClient->F));
 871                 uint32_to_buf(&buf2[5], rb_get_fd(xF2));
 872                 ssl_cmd_write_queue(server->localClient->ssl_ctl, NULL, 0, buf2, sizeof(buf2));
 873         }
 874
 875
 876         F[0] = server->localClient->F;
 877         F[1] = xF1;
 878         del_from_zconnid_hash(server);
 879         server->localClient->F = xF2;
 880         /* need to redo as what we did before isn't valid now */
 881         uint32_to_buf(&buf[1], server->localClient->zconnid);
 882         add_to_zconnid_hash(server);
 883
 884         server->localClient->z_ctl = which_ssld();
 885         if(!server->localClient->z_ctl)
 886         {
 887                 exit_client(server, server, server, "Error finding available ssld");
 888                 rb_free(buf);
 889                 return;
 890         }
 891         server->localClient->z_ctl->cli_count++;
 892         ssl_cmd_write_queue(server->localClient->z_ctl, F, 2, buf, len);
 893         rb_free(buf);
 894 }
 895
 896 static void
 897 collect_zipstats(void *unused)
 898 {
 899         rb_dlink_node *ptr;
 900         struct Client *target_p;
 901         char buf[sizeof(uint8_t) + sizeof(uint32_t) + HOSTLEN];
 902         void *odata;
 903         size_t len;
 904         uint32_t id;
 905
 906         buf[0] = 'S';
 907         odata = buf + sizeof(uint8_t) + sizeof(uint32_t);
 908
 909         RB_DLINK_FOREACH(ptr, serv_list.head)
 910         {
 911                 target_p = ptr->data;
 912                 if(IsCapable(target_p, CAP_ZIP))
 913                 {
 914                         len = sizeof(uint8_t) + sizeof(uint32_t);
 915
 916                         id = rb_get_fd(target_p->localClient->F);
 917                         uint32_to_buf(&buf[1], id);
 918                         rb_strlcpy(odata, target_p->name, (sizeof(buf) - len));
 919                         len += strlen(odata) + 1;       /* Get the \0 as well */
 920                         ssl_cmd_write_queue(target_p->localClient->z_ctl, NULL, 0, buf, len);
 921                 }
 922         }
 923 }
 924
 925 static void
 926 cleanup_dead_ssl(void *unused)
 927 {
 928         rb_dlink_node *ptr, *next;
 929         ssl_ctl_t *ctl;
 930         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 931         {
 932                 ctl = ptr->data;
 933                 if(ctl->dead && !ctl->cli_count)
 934                 {
 935                         free_ssl_daemon(ctl);
 936                 }
 937         }
 938 }
 939
 940 int
 941 get_ssld_count(void)
 942 {
 943         return ssld_count;
 944 }
 945
 946 void
 947 ssld_foreach_info(void (*func)(void *data, pid_t pid, int cli_count, enum ssld_status status, const char *version), void *data)
 948 {
 949         rb_dlink_node *ptr, *next;
 950         ssl_ctl_t *ctl;
 951         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 952         {
 953                 ctl = ptr->data;
 954                 func(data, ctl->pid, ctl->cli_count,
 955                         ctl->dead ? SSLD_DEAD :
 956                                 (ctl->shutdown ? SSLD_SHUTDOWN : SSLD_ACTIVE),
 957                         ctl->version);
 958         }
 959 }
 960
 961 void
 962 init_ssld(void)
 963 {
 964         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 965         rb_event_addish("cleanup_dead_ssld", cleanup_dead_ssl, NULL, 60);
 966 }