src/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  *  $Id$
  22  */
  23
  24 #include <ratbox_lib.h>
  25 #include "stdinc.h"
  26
  27
  28 #include "s_conf.h"
  29 #include "logger.h"
  30 #include "listener.h"
  31 #include "sslproc.h"
  32 #include "s_serv.h"
  33 #include "ircd.h"
  34 #include "hash.h"
  35 #include "client.h"
  36 #include "send.h"
  37 #include "packet.h"
  38
  39 #define ZIPSTATS_TIME           60
  40
  41 static void collect_zipstats(void *unused);
  42 static void ssl_read_ctl(rb_fde_t * F, void *data);
  43 static int ssld_count;
  44
  45 static char tmpbuf[READBUF_SIZE];
  46 static char nul = '\0';
  47
  48 #define MAXPASSFD 4
  49 #define READSIZE 1024
  50 typedef struct _ssl_ctl_buf
  51 {
  52         rb_dlink_node node;
  53         char *buf;
  54         size_t buflen;
  55         rb_fde_t *F[MAXPASSFD];
  56         int nfds;
  57 } ssl_ctl_buf_t;
  58
  59
  60 struct _ssl_ctl
  61 {
  62         rb_dlink_node node;
  63         int cli_count;
  64         rb_fde_t *F;
  65         rb_fde_t *P;
  66         pid_t pid;
  67         rb_dlink_list readq;
  68         rb_dlink_list writeq;
  69         uint8_t dead;
  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 static void send_init_prng(ssl_ctl_t * ctl, prng_seed_t seedtype, const char *path);
  75
  76
  77 static rb_dlink_list ssl_daemons;
  78
  79 static inline int32_t
  80 buf_to_int32(char *buf)
  81 {
  82         int32_t x;
  83         memcpy(&x, buf, sizeof(x));
  84         return x;
  85 }
  86
  87 static inline void
  88 int32_to_buf(char *buf, int32_t x)
  89 {
  90         memcpy(buf, &x, sizeof(x));
  91         return;
  92 }
  93
  94
  95 static inline uint16_t
  96 buf_to_uint16(char *buf)
  97 {
  98         uint16_t x;
  99         memcpy(&x, buf, sizeof(x));
 100         return x;
 101 }
 102
 103 static inline void
 104 uint16_to_buf(char *buf, uint16_t x)
 105 {
 106         memcpy(buf, &x, sizeof(x));
 107         return;
 108 }
 109
 110
 111 static ssl_ctl_t *
 112 allocate_ssl_daemon(rb_fde_t * F, rb_fde_t * P, int pid)
 113 {
 114         ssl_ctl_t *ctl;
 115
 116         if(F == NULL || pid < 0)
 117                 return NULL;
 118         ctl = rb_malloc(sizeof(ssl_ctl_t));
 119         ctl->F = F;
 120         ctl->P = P;
 121         ctl->pid = pid;
 122         ssld_count++;
 123         rb_dlinkAdd(ctl, &ctl->node, &ssl_daemons);
 124         return ctl;
 125 }
 126
 127 static void
 128 free_ssl_daemon(ssl_ctl_t * ctl)
 129 {
 130         rb_dlink_node *ptr;
 131         ssl_ctl_buf_t *ctl_buf;
 132         int x;
 133         if(ctl->cli_count)
 134                 return;
 135
 136         RB_DLINK_FOREACH(ptr, ctl->readq.head)
 137         {
 138                 ctl_buf = ptr->data;
 139                 for(x = 0; x < ctl_buf->nfds; x++)
 140                         rb_close(ctl_buf->F[x]);
 141
 142                 rb_free(ctl_buf->buf);
 143                 rb_free(ctl_buf);
 144         }
 145
 146         RB_DLINK_FOREACH(ptr, ctl->writeq.head)
 147         {
 148                 ctl_buf = ptr->data;
 149                 for(x = 0; x < ctl_buf->nfds; x++)
 150                         rb_close(ctl_buf->F[x]);
 151
 152                 rb_free(ctl_buf->buf);
 153                 rb_free(ctl_buf);
 154         }
 155         rb_close(ctl->F);
 156         rb_close(ctl->P);
 157         rb_dlinkDelete(&ctl->node, &ssl_daemons);
 158         rb_free(ctl);
 159 }
 160
 161 static char *ssld_path;
 162
 163 static int ssld_spin_count = 0;
 164 static time_t last_spin;
 165 static int ssld_wait = 0;
 166
 167
 168 static void
 169 ssl_killall(void)
 170 {
 171         rb_dlink_node *ptr, *next;
 172         ssl_ctl_t *ctl;
 173         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 174         {
 175                 ctl = ptr->data;
 176                 if(ctl->dead)
 177                         continue;
 178                 ctl->dead = 1;
 179                 ssld_count--;
 180                 rb_kill(ctl->pid, SIGKILL);
 181         }
 182 }
 183
 184 static void
 185 ssl_dead(ssl_ctl_t * ctl)
 186 {
 187         if(ctl->dead)
 188                 return;
 189
 190         ctl->dead = 1;
 191         ssld_count--;
 192         rb_kill(ctl->pid, SIGKILL);     /* make sure the process is really gone */
 193         ilog(L_MAIN, "ssld helper died - attempting to restart");
 194         sendto_realops_snomask(SNO_GENERAL, L_ALL, "ssld helper died - attempting to restart");
 195         start_ssldaemon(1, ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params);
 196 }
 197
 198 static void
 199 ssl_do_pipe(rb_fde_t * F, void *data)
 200 {
 201         int retlen;
 202         ssl_ctl_t *ctl = data;
 203         retlen = rb_write(F, "0", 1);
 204         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 205         {
 206                 ssl_dead(ctl);
 207                 return;
 208         }
 209         rb_setselect(F, RB_SELECT_READ, ssl_do_pipe, data);
 210 }
 211
 212 static void
 213 restart_ssld_event(void *unused)
 214 {
 215         ssld_spin_count = 0;
 216         last_spin = 0;
 217         ssld_wait = 0;
 218         if(ServerInfo.ssld_count > get_ssld_count())
 219         {
 220                 int start = ServerInfo.ssld_count - get_ssld_count();
 221                 ilog(L_MAIN, "Attempting to restart ssld processes");
 222                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Attempt to restart ssld processes");
 223                 start_ssldaemon(start, ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params);
 224         }
 225 }
 226
 227 int
 228 start_ssldaemon(int count, const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 229 {
 230         rb_fde_t *F1, *F2;
 231         rb_fde_t *P1, *P2;
 232 #ifdef _WIN32
 233         const char *suffix = ".exe";
 234 #else
 235         const char *suffix = "";
 236 #endif
 237
 238         char fullpath[PATH_MAX + 1];
 239         char fdarg[6];
 240         const char *parv[2];
 241         char buf[128];
 242         char s_pid[10];
 243         pid_t pid;
 244         int started = 0, i;
 245
 246         if(ssld_wait)
 247                 return 0;
 248
 249         if(ssld_spin_count > 20 && (rb_current_time() - last_spin < 5))
 250         {
 251                 ilog(L_MAIN, "ssld helper is spinning - will attempt to restart in 1 minute");
 252                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 253                                        "ssld helper is spinning - will attempt to restart in 1 minute");
 254                 rb_event_add("restart_ssld_event", restart_ssld_event, NULL, 60);
 255                 ssld_wait = 1;
 256                 return 0;
 257         }
 258
 259         ssld_spin_count++;
 260         last_spin = rb_current_time();
 261
 262         if(ssld_path == NULL)
 263         {
 264                 rb_snprintf(fullpath, sizeof(fullpath), "%s/ssld%s", BINPATH, suffix);
 265
 266                 if(access(fullpath, X_OK) == -1)
 267                 {
 268                         rb_snprintf(fullpath, sizeof(fullpath), "%s/bin/ssld%s",
 269                                     ConfigFileEntry.dpath, suffix);
 270                         if(access(fullpath, X_OK) == -1)
 271                         {
 272                                 ilog(L_MAIN,
 273                                      "Unable to execute ssld%s in %s/bin or %s",
 274                                      ConfigFileEntry.dpath, suffix, BINPATH);
 275                                 return 0;
 276                         }
 277                 }
 278                 ssld_path = rb_strdup(fullpath);
 279         }
 280         rb_strlcpy(buf, "-ircd ssld daemon helper", sizeof(buf));
 281         parv[0] = buf;
 282         parv[1] = NULL;
 283
 284         for(i = 0; i < count; i++)
 285         {
 286                 ssl_ctl_t *ctl;
 287                 rb_socketpair(AF_UNIX, SOCK_DGRAM, 0, &F1, &F2, "SSL/TLS handle passing socket");
 288                 rb_set_buffers(F1, READBUF_SIZE);
 289                 rb_set_buffers(F2, READBUF_SIZE);
 290                 rb_snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(F2));
 291                 rb_setenv("CTL_FD", fdarg, 1);
 292                 rb_pipe(&P1, &P2, "SSL/TLS pipe");
 293                 rb_snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(P1));
 294                 rb_setenv("CTL_PIPE", fdarg, 1);
 295                 rb_snprintf(s_pid, sizeof(s_pid), "%d", (int)getpid());
 296                 rb_setenv("CTL_PPID", s_pid, 1);
 297 #ifdef _WIN32
 298                 SetHandleInformation((HANDLE) rb_get_fd(F2), HANDLE_FLAG_INHERIT, 1);
 299                 SetHandleInformation((HANDLE) rb_get_fd(P1), HANDLE_FLAG_INHERIT, 1);
 300 #endif
 301
 302                 pid = rb_spawn_process(ssld_path, (const char **) parv);
 303                 if(pid == -1)
 304                 {
 305                         ilog(L_MAIN, "Unable to create ssld: %s\n", strerror(errno));
 306                         rb_close(F1);
 307                         rb_close(F2);
 308                         rb_close(P1);
 309                         rb_close(P2);
 310                         return started;
 311                 }
 312                 started++;
 313                 rb_close(F2);
 314                 rb_close(P1);
 315                 ctl = allocate_ssl_daemon(F1, P2, pid);
 316                 if(ssl_ok)
 317                 {
 318                         if(ConfigFileEntry.use_egd && (ConfigFileEntry.egdpool_path != NULL))
 319                                 send_init_prng(ctl, RB_PRNG_EGD, ConfigFileEntry.egdpool_path);
 320                         else
 321                                 send_init_prng(ctl, RB_PRNG_DEFAULT, NULL);
 322                 }
 323                 if(ssl_ok && ssl_cert != NULL && ssl_private_key != NULL)
 324                         send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key,
 325                                                ssl_dh_params != NULL ? ssl_dh_params : "");
 326                 ssl_read_ctl(ctl->F, ctl);
 327                 ssl_do_pipe(P2, ctl);
 328
 329         }
 330         return started;
 331 }
 332
 333 static void
 334 ssl_process_zipstats(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 335 {
 336         struct Client *server;
 337         struct ZipStats *zips;
 338         int parc;
 339         char *parv[6];
 340         parc = rb_string_to_array(ctl_buf->buf, parv, 6);
 341         server = find_server(NULL, parv[1]);
 342         if(server == NULL || server->localClient == NULL || !IsCapable(server, CAP_ZIP))
 343                 return;
 344         if(server->localClient->zipstats == NULL)
 345                 server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 346
 347         zips = server->localClient->zipstats;
 348
 349         zips->in += strtoull(parv[2], NULL, 10);
 350         zips->in_wire += strtoull(parv[3], NULL, 10);
 351         zips->out += strtoull(parv[4], NULL, 10);
 352         zips->out_wire += strtoull(parv[5], NULL, 10);
 353
 354         if(zips->in > 0)
 355                 zips->in_ratio = ((double) (zips->in - zips->in_wire) / (double) zips->in) * 100.00;
 356         else
 357                 zips->in_ratio = 0;
 358
 359         if(zips->out > 0)
 360                 zips->out_ratio = ((double) (zips->out - zips->out_wire) / (double) zips->out) * 100.00;
 361         else
 362                 zips->out_ratio = 0;
 363 }
 364
 365 static void
 366 ssl_process_dead_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 367 {
 368         struct Client *client_p;
 369         char reason[256];
 370         int32_t fd;
 371
 372         if(ctl_buf->buflen < 6)
 373                 return;         /* bogus message..drop it.. XXX should warn here */
 374
 375         fd = buf_to_int32(&ctl_buf->buf[1]);
 376         rb_strlcpy(reason, &ctl_buf->buf[5], sizeof(reason));
 377         client_p = find_cli_fd_hash(fd);
 378         if(client_p == NULL)
 379                 return;
 380         if(IsAnyServer(client_p) || IsRegistered(client_p))
 381         {
 382                 /* read any last moment ERROR, QUIT or the like -- jilles */
 383                 if (!strcmp(reason, "Remote host closed the connection"))
 384                         read_packet(client_p->localClient->F, client_p);
 385                 if (IsAnyDead(client_p))
 386                         return;
 387         }
 388         if(IsAnyServer(client_p))
 389         {
 390                 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);
 391                 ilog(L_SERVER, "ssld error for %s: %s", log_client_name(client_p, SHOW_IP), reason);
 392         }
 393         exit_client(client_p, client_p, &me, reason);
 394 }
 395
 396 static void
 397 ssl_process_cmd_recv(ssl_ctl_t * ctl)
 398 {
 399         static const char *cannot_setup_ssl = "ssld cannot setup ssl, check your certificates and private key";
 400         static const char *no_ssl_or_zlib = "ssld has neither SSL/TLS or zlib support killing all sslds";
 401         rb_dlink_node *ptr, *next;
 402         ssl_ctl_buf_t *ctl_buf;
 403         if(ctl->dead)
 404                 return;
 405         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head)
 406         {
 407                 ctl_buf = ptr->data;
 408                 switch (*ctl_buf->buf)
 409                 {
 410                 case 'N':
 411                         ssl_ok = 0;     /* ssld says it can't do ssl/tls */
 412                         break;
 413                 case 'D':
 414                         ssl_process_dead_fd(ctl, ctl_buf);
 415                         break;
 416                 case 'S':
 417                         ssl_process_zipstats(ctl, ctl_buf);
 418                         break;
 419                 case 'I':
 420                         ssl_ok = 0;
 421                         ilog(L_MAIN, cannot_setup_ssl);
 422                         sendto_realops_snomask(SNO_GENERAL, L_ALL, cannot_setup_ssl);
 423                 case 'U':
 424                         zlib_ok = 0;
 425                         ssl_ok = 0;
 426                         ilog(L_MAIN, no_ssl_or_zlib);
 427                         sendto_realops_snomask(SNO_GENERAL, L_ALL, no_ssl_or_zlib);
 428                         ssl_killall();
 429                         break;
 430                 case 'z':
 431                         zlib_ok = 0;
 432                         break;
 433                 default:
 434                         ilog(L_MAIN, "Received invalid command from ssld: %s", ctl_buf->buf);
 435                         sendto_realops_snomask(SNO_GENERAL, L_ALL, "Received invalid command from ssld");
 436                         break;
 437                 }
 438                 rb_dlinkDelete(ptr, &ctl->readq);
 439                 rb_free(ctl_buf->buf);
 440                 rb_free(ctl_buf);
 441         }
 442
 443 }
 444
 445
 446 static void
 447 ssl_read_ctl(rb_fde_t * F, void *data)
 448 {
 449         ssl_ctl_buf_t *ctl_buf;
 450         ssl_ctl_t *ctl = data;
 451         int retlen;
 452
 453         if(ctl->dead)
 454                 return;
 455         do
 456         {
 457                 ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 458                 ctl_buf->buf = rb_malloc(READSIZE);
 459                 retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, READSIZE, ctl_buf->F, 4);
 460                 ctl_buf->buflen = retlen;
 461                 if(retlen <= 0)
 462                 {
 463                         rb_free(ctl_buf->buf);
 464                         rb_free(ctl_buf);
 465                 }
 466                 else
 467                         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq);
 468         }
 469         while(retlen > 0);
 470
 471         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 472         {
 473                 ssl_dead(ctl);
 474                 return;
 475         }
 476         ssl_process_cmd_recv(ctl);
 477         rb_setselect(ctl->F, RB_SELECT_READ, ssl_read_ctl, ctl);
 478 }
 479
 480 static ssl_ctl_t *
 481 which_ssld(void)
 482 {
 483         ssl_ctl_t *ctl, *lowest = NULL;
 484         rb_dlink_node *ptr;
 485
 486         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 487         {
 488                 ctl = ptr->data;
 489                 if(ctl->dead)
 490                         continue;
 491                 if(lowest == NULL)
 492                 {
 493                         lowest = ctl;
 494                         continue;
 495                 }
 496                 if(ctl->cli_count < lowest->cli_count)
 497                         lowest = ctl;
 498         }
 499         return (lowest);
 500 }
 501
 502 static void
 503 ssl_write_ctl(rb_fde_t * F, void *data)
 504 {
 505         ssl_ctl_t *ctl = data;
 506         ssl_ctl_buf_t *ctl_buf;
 507         rb_dlink_node *ptr, *next;
 508         int retlen, x;
 509
 510         if(ctl->dead)
 511                 return;
 512
 513         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
 514         {
 515                 ctl_buf = ptr->data;
 516                 /* in theory unix sock_dgram shouldn't ever short write this.. */
 517                 retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, ctl_buf->buflen, ctl->pid);
 518                 if(retlen > 0)
 519                 {
 520                         rb_dlinkDelete(ptr, &ctl->writeq);
 521                         for(x = 0; x < ctl_buf->nfds; x++)
 522                                 rb_close(ctl_buf->F[x]);
 523                         rb_free(ctl_buf->buf);
 524                         rb_free(ctl_buf);
 525
 526                 }
 527                 if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 528                 {
 529                         ssl_dead(ctl);
 530                         return;
 531                 }
 532                 else
 533                 {
 534                         rb_setselect(ctl->F, RB_SELECT_WRITE, ssl_write_ctl, ctl);
 535                 }
 536         }
 537 }
 538
 539 static void
 540 ssl_cmd_write_queue(ssl_ctl_t * ctl, rb_fde_t ** F, int count, const void *buf, size_t buflen)
 541 {
 542         ssl_ctl_buf_t *ctl_buf;
 543         int x;
 544
 545         /* don't bother */
 546         if(ctl->dead)
 547                 return;
 548
 549         ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 550         ctl_buf->buf = rb_malloc(buflen);
 551         memcpy(ctl_buf->buf, buf, buflen);
 552         ctl_buf->buflen = buflen;
 553
 554         for(x = 0; x < count && x < MAXPASSFD; x++)
 555         {
 556                 ctl_buf->F[x] = F[x];
 557         }
 558         ctl_buf->nfds = count;
 559         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq);
 560         ssl_write_ctl(ctl->F, ctl);
 561 }
 562
 563
 564 static void
 565 send_new_ssl_certs_one(ssl_ctl_t * ctl, const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 566 {
 567         size_t len;
 568
 569         len = strlen(ssl_cert) + strlen(ssl_private_key) + strlen(ssl_dh_params) + 5;
 570         if(len > sizeof(tmpbuf))
 571         {
 572                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 573                                        "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 574                                        len, sizeof(tmpbuf));
 575                 ilog(L_MAIN,
 576                      "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 577                      len, sizeof(tmpbuf));
 578                 return;
 579         }
 580         len = rb_snprintf(tmpbuf, sizeof(tmpbuf), "K%c%s%c%s%c%s%c", nul, ssl_cert, nul,
 581                           ssl_private_key, nul, ssl_dh_params, nul);
 582         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 583 }
 584
 585 static void
 586 send_init_prng(ssl_ctl_t * ctl, prng_seed_t seedtype, const char *path)
 587 {
 588         size_t len;
 589         const char *s;
 590         uint8_t seed = (uint8_t) seedtype;
 591
 592         if(path == NULL)
 593                 s = "";
 594         else
 595                 s = path;
 596
 597         len = strlen(s) + 3;
 598         if(len > sizeof(tmpbuf))
 599         {
 600                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 601                                        "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 602                                        len, sizeof(tmpbuf));
 603                 ilog(L_MAIN,
 604                      "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 605                      len, sizeof(tmpbuf));
 606                 return;
 607
 608         }
 609         len = rb_snprintf(tmpbuf, sizeof(tmpbuf), "I%c%s%c", seed, s, nul);
 610         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 611 }
 612
 613 void
 614 send_new_ssl_certs(const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 615 {
 616         rb_dlink_node *ptr;
 617         if(ssl_cert == NULL || ssl_private_key == NULL || ssl_dh_params == NULL)
 618         {
 619                 ssl_ok = 0;
 620                 return;
 621         }
 622         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 623         {
 624                 ssl_ctl_t *ctl = ptr->data;
 625                 send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key, ssl_dh_params);
 626         }
 627 }
 628
 629
 630 ssl_ctl_t *
 631 start_ssld_accept(rb_fde_t * sslF, rb_fde_t * plainF, int32_t id)
 632 {
 633         rb_fde_t *F[2];
 634         ssl_ctl_t *ctl;
 635         char buf[5];
 636         F[0] = sslF;
 637         F[1] = plainF;
 638
 639         buf[0] = 'A';
 640         int32_to_buf(&buf[1], id);
 641         ctl = which_ssld();
 642         ctl->cli_count++;
 643         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 644         return ctl;
 645 }
 646
 647 ssl_ctl_t *
 648 start_ssld_connect(rb_fde_t * sslF, rb_fde_t * plainF, int32_t id)
 649 {
 650         rb_fde_t *F[2];
 651         ssl_ctl_t *ctl;
 652         char buf[5];
 653         F[0] = sslF;
 654         F[1] = plainF;
 655
 656         buf[0] = 'C';
 657         int32_to_buf(&buf[1], id);
 658
 659         ctl = which_ssld();
 660         ctl->cli_count++;
 661         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 662         return ctl;
 663 }
 664
 665 void
 666 ssld_decrement_clicount(ssl_ctl_t * ctl)
 667 {
 668         if(ctl == NULL)
 669                 return;
 670
 671         ctl->cli_count--;
 672         if(ctl->dead && !ctl->cli_count)
 673         {
 674                 free_ssl_daemon(ctl);
 675         }
 676 }
 677
 678 /*
 679  * what we end up sending to the ssld process for ziplinks is the following
 680  * Z[ourfd][level][RECVQ]
 681  * Z = ziplinks command = buf[0]
 682  * ourfd = Our end of the socketpair = buf[1..4]
 683  * level = zip level buf[5]
 684  * recvqlen = our recvq len = buf[6-7]
 685  * recvq = any data we read prior to starting ziplinks
 686  */
 687 void
 688 start_zlib_session(void *data)
 689 {
 690         struct Client *server = (struct Client *) data;
 691         uint16_t recvqlen;
 692         uint8_t level;
 693         void *xbuf;
 694
 695         rb_fde_t *F[2];
 696         rb_fde_t *xF1, *xF2;
 697         char *buf;
 698         void *recvq_start;
 699
 700         size_t hdr = (sizeof(uint8_t) * 2) + sizeof(int32_t);
 701         size_t len;
 702         int cpylen, left;
 703
 704         server->localClient->event = NULL;
 705
 706         recvqlen = rb_linebuf_len(&server->localClient->buf_recvq);
 707
 708         len = recvqlen + hdr;
 709
 710         if(len > READBUF_SIZE)
 711         {
 712                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 713                                        "ssld - attempted to pass message of %zd len, max len %d, giving up",
 714                                        len, READBUF_SIZE);
 715                 ilog(L_MAIN, "ssld - attempted to pass message of %zd len, max len %d, giving up", len, READBUF_SIZE);
 716                 exit_client(server, server, server, "ssld readbuf exceeded");
 717                 return;
 718         }
 719
 720         buf = rb_malloc(len);
 721         level = ConfigFileEntry.compression_level;
 722
 723         int32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 724         buf[5] = (char) level;
 725
 726         recvq_start = &buf[6];
 727         server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 728
 729         xbuf = recvq_start;
 730         left = recvqlen;
 731
 732         do
 733         {
 734                 cpylen = rb_linebuf_get(&server->localClient->buf_recvq, xbuf, left, LINEBUF_PARTIAL, LINEBUF_RAW);
 735                 left -= cpylen;
 736                 xbuf = (void *) (((uintptr_t) xbuf) + cpylen);
 737         }
 738         while(cpylen > 0);
 739
 740         /* Pass the socket to ssld. */
 741         *buf = 'Z';
 742         rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF1, &xF2, "Initial zlib socketpairs");
 743
 744         F[0] = server->localClient->F;
 745         F[1] = xF1;
 746         del_from_cli_fd_hash(server);
 747         server->localClient->F = xF2;
 748         /* need to redo as what we did before isn't valid now */
 749         int32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 750         add_to_cli_fd_hash(server);
 751
 752         server->localClient->z_ctl = which_ssld();
 753         server->localClient->z_ctl->cli_count++;
 754         ssl_cmd_write_queue(server->localClient->z_ctl, F, 2, buf, len);
 755         rb_free(buf);
 756 }
 757
 758 static void
 759 collect_zipstats(void *unused)
 760 {
 761         rb_dlink_node *ptr;
 762         struct Client *target_p;
 763         char buf[sizeof(uint8_t) + sizeof(int32_t) + HOSTLEN];
 764         void *odata;
 765         size_t len;
 766         int32_t id;
 767
 768         buf[0] = 'S';
 769         odata = buf + sizeof(uint8_t) + sizeof(int32_t);
 770
 771         RB_DLINK_FOREACH(ptr, serv_list.head)
 772         {
 773                 target_p = ptr->data;
 774                 if(IsCapable(target_p, CAP_ZIP))
 775                 {
 776                         len = sizeof(uint8_t) + sizeof(uint32_t);
 777
 778                         id = rb_get_fd(target_p->localClient->F);
 779                         int32_to_buf(&buf[1], rb_get_fd(target_p->localClient->F));
 780                         rb_strlcpy(odata, target_p->name, (sizeof(buf) - len));
 781                         len += strlen(odata) + 1;       /* Get the \0 as well */
 782                         ssl_cmd_write_queue(target_p->localClient->z_ctl, NULL, 0, buf, len);
 783                 }
 784         }
 785 }
 786
 787 static void
 788 cleanup_dead_ssl(void *unused)
 789 {
 790         rb_dlink_node *ptr, *next;
 791         ssl_ctl_t *ctl;
 792         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 793         {
 794                 ctl = ptr->data;
 795                 if(ctl->dead && !ctl->cli_count)
 796                 {
 797                         free_ssl_daemon(ctl);
 798                 }
 799         }
 800 }
 801
 802 int
 803 get_ssld_count(void)
 804 {
 805         return ssld_count;
 806 }
 807
 808 void
 809 init_ssld(void)
 810 {
 811         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 812         rb_event_addish("cleanup_dead_ssld", cleanup_dead_ssl, NULL, 1200);
 813 }