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))
 381         {
 382                 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);
 383                 ilog(L_SERVER, "ssld error for %s: %s", log_client_name(client_p, SHOW_IP), reason);
 384         }
 385         exit_client(client_p, client_p, &me, reason);
 386 }
 387
 388 static void
 389 ssl_process_cmd_recv(ssl_ctl_t * ctl)
 390 {
 391         static const char *cannot_setup_ssl = "ssld cannot setup ssl, check your certificates and private key";
 392         static const char *no_ssl_or_zlib = "ssld has neither SSL/TLS or zlib support killing all sslds";
 393         rb_dlink_node *ptr, *next;
 394         ssl_ctl_buf_t *ctl_buf;
 395         if(ctl->dead)
 396                 return;
 397         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head)
 398         {
 399                 ctl_buf = ptr->data;
 400                 switch (*ctl_buf->buf)
 401                 {
 402                 case 'N':
 403                         ssl_ok = 0;     /* ssld says it can't do ssl/tls */
 404                         break;
 405                 case 'D':
 406                         ssl_process_dead_fd(ctl, ctl_buf);
 407                         break;
 408                 case 'S':
 409                         ssl_process_zipstats(ctl, ctl_buf);
 410                         break;
 411                 case 'I':
 412                         ssl_ok = 0;
 413                         ilog(L_MAIN, cannot_setup_ssl);
 414                         sendto_realops_snomask(SNO_GENERAL, L_ALL, cannot_setup_ssl);
 415                 case 'U':
 416                         zlib_ok = 0;
 417                         ssl_ok = 0;
 418                         ilog(L_MAIN, no_ssl_or_zlib);
 419                         sendto_realops_snomask(SNO_GENERAL, L_ALL, no_ssl_or_zlib);
 420                         ssl_killall();
 421                         break;
 422                 case 'z':
 423                         zlib_ok = 0;
 424                         break;
 425                 default:
 426                         ilog(L_MAIN, "Received invalid command from ssld: %s", ctl_buf->buf);
 427                         sendto_realops_snomask(SNO_GENERAL, L_ALL, "Received invalid command from ssld");
 428                         break;
 429                 }
 430                 rb_dlinkDelete(ptr, &ctl->readq);
 431                 rb_free(ctl_buf->buf);
 432                 rb_free(ctl_buf);
 433         }
 434
 435 }
 436
 437
 438 static void
 439 ssl_read_ctl(rb_fde_t * F, void *data)
 440 {
 441         ssl_ctl_buf_t *ctl_buf;
 442         ssl_ctl_t *ctl = data;
 443         int retlen;
 444
 445         if(ctl->dead)
 446                 return;
 447         do
 448         {
 449                 ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 450                 ctl_buf->buf = rb_malloc(READSIZE);
 451                 retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, READSIZE, ctl_buf->F, 4);
 452                 ctl_buf->buflen = retlen;
 453                 if(retlen <= 0)
 454                 {
 455                         rb_free(ctl_buf->buf);
 456                         rb_free(ctl_buf);
 457                 }
 458                 else
 459                         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq);
 460         }
 461         while(retlen > 0);
 462
 463         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 464         {
 465                 ssl_dead(ctl);
 466                 return;
 467         }
 468         ssl_process_cmd_recv(ctl);
 469         rb_setselect(ctl->F, RB_SELECT_READ, ssl_read_ctl, ctl);
 470 }
 471
 472 static ssl_ctl_t *
 473 which_ssld(void)
 474 {
 475         ssl_ctl_t *ctl, *lowest = NULL;
 476         rb_dlink_node *ptr;
 477
 478         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 479         {
 480                 ctl = ptr->data;
 481                 if(ctl->dead)
 482                         continue;
 483                 if(lowest == NULL)
 484                 {
 485                         lowest = ctl;
 486                         continue;
 487                 }
 488                 if(ctl->cli_count < lowest->cli_count)
 489                         lowest = ctl;
 490         }
 491         return (lowest);
 492 }
 493
 494 static void
 495 ssl_write_ctl(rb_fde_t * F, void *data)
 496 {
 497         ssl_ctl_t *ctl = data;
 498         ssl_ctl_buf_t *ctl_buf;
 499         rb_dlink_node *ptr, *next;
 500         int retlen, x;
 501
 502         if(ctl->dead)
 503                 return;
 504
 505         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
 506         {
 507                 ctl_buf = ptr->data;
 508                 /* in theory unix sock_dgram shouldn't ever short write this.. */
 509                 retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, ctl_buf->buflen, ctl->pid);
 510                 if(retlen > 0)
 511                 {
 512                         rb_dlinkDelete(ptr, &ctl->writeq);
 513                         for(x = 0; x < ctl_buf->nfds; x++)
 514                                 rb_close(ctl_buf->F[x]);
 515                         rb_free(ctl_buf->buf);
 516                         rb_free(ctl_buf);
 517
 518                 }
 519                 if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 520                 {
 521                         ssl_dead(ctl);
 522                         return;
 523                 }
 524                 else
 525                 {
 526                         rb_setselect(ctl->F, RB_SELECT_WRITE, ssl_write_ctl, ctl);
 527                 }
 528         }
 529 }
 530
 531 static void
 532 ssl_cmd_write_queue(ssl_ctl_t * ctl, rb_fde_t ** F, int count, const void *buf, size_t buflen)
 533 {
 534         ssl_ctl_buf_t *ctl_buf;
 535         int x;
 536
 537         /* don't bother */
 538         if(ctl->dead)
 539                 return;
 540
 541         ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 542         ctl_buf->buf = rb_malloc(buflen);
 543         memcpy(ctl_buf->buf, buf, buflen);
 544         ctl_buf->buflen = buflen;
 545
 546         for(x = 0; x < count && x < MAXPASSFD; x++)
 547         {
 548                 ctl_buf->F[x] = F[x];
 549         }
 550         ctl_buf->nfds = count;
 551         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq);
 552         ssl_write_ctl(ctl->F, ctl);
 553 }
 554
 555
 556 static void
 557 send_new_ssl_certs_one(ssl_ctl_t * ctl, const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 558 {
 559         size_t len;
 560
 561         len = strlen(ssl_cert) + strlen(ssl_private_key) + strlen(ssl_dh_params) + 5;
 562         if(len > sizeof(tmpbuf))
 563         {
 564                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 565                                        "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 566                                        len, sizeof(tmpbuf));
 567                 ilog(L_MAIN,
 568                      "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 569                      len, sizeof(tmpbuf));
 570                 return;
 571         }
 572         len = rb_snprintf(tmpbuf, sizeof(tmpbuf), "K%c%s%c%s%c%s%c", nul, ssl_cert, nul,
 573                           ssl_private_key, nul, ssl_dh_params, nul);
 574         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 575 }
 576
 577 static void
 578 send_init_prng(ssl_ctl_t * ctl, prng_seed_t seedtype, const char *path)
 579 {
 580         size_t len;
 581         const char *s;
 582         uint8_t seed = (uint8_t) seedtype;
 583
 584         if(path == NULL)
 585                 s = "";
 586         else
 587                 s = path;
 588
 589         len = strlen(s) + 3;
 590         if(len > sizeof(tmpbuf))
 591         {
 592                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 593                                        "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 594                                        len, sizeof(tmpbuf));
 595                 ilog(L_MAIN,
 596                      "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 597                      len, sizeof(tmpbuf));
 598                 return;
 599
 600         }
 601         len = rb_snprintf(tmpbuf, sizeof(tmpbuf), "I%c%s%c", seed, s, nul);
 602         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 603 }
 604
 605 void
 606 send_new_ssl_certs(const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 607 {
 608         rb_dlink_node *ptr;
 609         if(ssl_cert == NULL || ssl_private_key == NULL || ssl_dh_params == NULL)
 610         {
 611                 ssl_ok = 0;
 612                 return;
 613         }
 614         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 615         {
 616                 ssl_ctl_t *ctl = ptr->data;
 617                 send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key, ssl_dh_params);
 618         }
 619 }
 620
 621
 622 ssl_ctl_t *
 623 start_ssld_accept(rb_fde_t * sslF, rb_fde_t * plainF, int32_t id)
 624 {
 625         rb_fde_t *F[2];
 626         ssl_ctl_t *ctl;
 627         char buf[5];
 628         F[0] = sslF;
 629         F[1] = plainF;
 630
 631         buf[0] = 'A';
 632         int32_to_buf(&buf[1], id);
 633         ctl = which_ssld();
 634         ctl->cli_count++;
 635         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 636         return ctl;
 637 }
 638
 639 ssl_ctl_t *
 640 start_ssld_connect(rb_fde_t * sslF, rb_fde_t * plainF, int32_t id)
 641 {
 642         rb_fde_t *F[2];
 643         ssl_ctl_t *ctl;
 644         char buf[5];
 645         F[0] = sslF;
 646         F[1] = plainF;
 647
 648         buf[0] = 'C';
 649         int32_to_buf(&buf[1], id);
 650
 651         ctl = which_ssld();
 652         ctl->cli_count++;
 653         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 654         return ctl;
 655 }
 656
 657 void
 658 ssld_decrement_clicount(ssl_ctl_t * ctl)
 659 {
 660         if(ctl == NULL)
 661                 return;
 662
 663         ctl->cli_count--;
 664         if(ctl->dead && !ctl->cli_count)
 665         {
 666                 free_ssl_daemon(ctl);
 667         }
 668 }
 669
 670 /*
 671  * what we end up sending to the ssld process for ziplinks is the following
 672  * Z[ourfd][level][RECVQ]
 673  * Z = ziplinks command = buf[0]
 674  * ourfd = Our end of the socketpair = buf[1..4]
 675  * level = zip level buf[5]
 676  * recvqlen = our recvq len = buf[6-7]
 677  * recvq = any data we read prior to starting ziplinks
 678  */
 679 void
 680 start_zlib_session(void *data)
 681 {
 682         struct Client *server = (struct Client *) data;
 683         uint16_t recvqlen;
 684         uint8_t level;
 685         void *xbuf;
 686
 687         rb_fde_t *F[2];
 688         rb_fde_t *xF1, *xF2;
 689         char *buf;
 690         void *recvq_start;
 691
 692         size_t hdr = (sizeof(uint8_t) * 2) + sizeof(int32_t);
 693         size_t len;
 694         int cpylen, left;
 695
 696         server->localClient->event = NULL;
 697
 698         recvqlen = rb_linebuf_len(&server->localClient->buf_recvq);
 699
 700         len = recvqlen + hdr;
 701
 702         if(len > READBUF_SIZE)
 703         {
 704                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 705                                        "ssld - attempted to pass message of %zd len, max len %d, giving up",
 706                                        len, READBUF_SIZE);
 707                 ilog(L_MAIN, "ssld - attempted to pass message of %zd len, max len %d, giving up", len, READBUF_SIZE);
 708                 exit_client(server, server, server, "ssld readbuf exceeded");
 709                 return;
 710         }
 711
 712         buf = rb_malloc(len);
 713         level = ConfigFileEntry.compression_level;
 714
 715         int32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 716         buf[5] = (char) level;
 717
 718         recvq_start = &buf[6];
 719         server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 720
 721         xbuf = recvq_start;
 722         left = recvqlen;
 723
 724         do
 725         {
 726                 cpylen = rb_linebuf_get(&server->localClient->buf_recvq, xbuf, left, LINEBUF_PARTIAL, LINEBUF_RAW);
 727                 left -= cpylen;
 728                 xbuf = (void *) (((uintptr_t) xbuf) + cpylen);
 729         }
 730         while(cpylen > 0);
 731
 732         /* Pass the socket to ssld. */
 733         *buf = 'Z';
 734         rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF1, &xF2, "Initial zlib socketpairs");
 735
 736         F[0] = server->localClient->F;
 737         F[1] = xF1;
 738         del_from_cli_fd_hash(server);
 739         server->localClient->F = xF2;
 740         /* need to redo as what we did before isn't valid now */
 741         int32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 742         add_to_cli_fd_hash(server);
 743
 744         server->localClient->z_ctl = which_ssld();
 745         server->localClient->z_ctl->cli_count++;
 746         ssl_cmd_write_queue(server->localClient->z_ctl, F, 2, buf, len);
 747         rb_free(buf);
 748 }
 749
 750 static void
 751 collect_zipstats(void *unused)
 752 {
 753         rb_dlink_node *ptr;
 754         struct Client *target_p;
 755         char buf[sizeof(uint8_t) + sizeof(int32_t) + HOSTLEN];
 756         void *odata;
 757         size_t len;
 758         int32_t id;
 759
 760         buf[0] = 'S';
 761         odata = buf + sizeof(uint8_t) + sizeof(int32_t);
 762
 763         RB_DLINK_FOREACH(ptr, serv_list.head)
 764         {
 765                 target_p = ptr->data;
 766                 if(IsCapable(target_p, CAP_ZIP))
 767                 {
 768                         len = sizeof(uint8_t) + sizeof(uint32_t);
 769
 770                         id = rb_get_fd(target_p->localClient->F);
 771                         int32_to_buf(&buf[1], rb_get_fd(target_p->localClient->F));
 772                         rb_strlcpy(odata, target_p->name, (sizeof(buf) - len));
 773                         len += strlen(odata) + 1;       /* Get the \0 as well */
 774                         ssl_cmd_write_queue(target_p->localClient->z_ctl, NULL, 0, buf, len);
 775                 }
 776         }
 777 }
 778
 779 static void
 780 cleanup_dead_ssl(void *unused)
 781 {
 782         rb_dlink_node *ptr, *next;
 783         ssl_ctl_t *ctl;
 784         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 785         {
 786                 ctl = ptr->data;
 787                 if(ctl->dead && !ctl->cli_count)
 788                 {
 789                         free_ssl_daemon(ctl);
 790                 }
 791         }
 792 }
 793
 794 int
 795 get_ssld_count(void)
 796 {
 797         return ssld_count;
 798 }
 799
 800 void
 801 init_ssld(void)
 802 {
 803         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 804         rb_event_addish("cleanup_dead_ssld", cleanup_dead_ssl, NULL, 1200);
 805 }