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                 if(rb_socketpair(AF_UNIX, SOCK_DGRAM, 0, &F1, &F2, "SSL/TLS handle passing socket") == -1)
 288                 {
 289                         ilog(L_MAIN, "Unable to create ssld - rb_socketpair failed: %s", strerror(errno));
 290                         return started;
 291                 }
 292
 293                 rb_set_buffers(F1, READBUF_SIZE);
 294                 rb_set_buffers(F2, READBUF_SIZE);
 295                 rb_snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(F2));
 296                 rb_setenv("CTL_FD", fdarg, 1);
 297                 if(rb_pipe(&P1, &P2, "SSL/TLS pipe") == -1)
 298                 {
 299                         ilog(L_MAIN, "Unable to create ssld - rb_pipe failed: %s", strerror(errno));
 300                         return started;
 301                 }
 302                 rb_snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(P1));
 303                 rb_setenv("CTL_PIPE", fdarg, 1);
 304                 rb_snprintf(s_pid, sizeof(s_pid), "%d", (int)getpid());
 305                 rb_setenv("CTL_PPID", s_pid, 1);
 306 #ifdef _WIN32
 307                 SetHandleInformation((HANDLE) rb_get_fd(F2), HANDLE_FLAG_INHERIT, 1);
 308                 SetHandleInformation((HANDLE) rb_get_fd(P1), HANDLE_FLAG_INHERIT, 1);
 309 #endif
 310
 311                 pid = rb_spawn_process(ssld_path, (const char **) parv);
 312                 if(pid == -1)
 313                 {
 314                         ilog(L_MAIN, "Unable to create ssld: %s\n", strerror(errno));
 315                         rb_close(F1);
 316                         rb_close(F2);
 317                         rb_close(P1);
 318                         rb_close(P2);
 319                         return started;
 320                 }
 321                 started++;
 322                 rb_close(F2);
 323                 rb_close(P1);
 324                 ctl = allocate_ssl_daemon(F1, P2, pid);
 325                 if(ssl_ok)
 326                 {
 327                         if(ConfigFileEntry.use_egd && (ConfigFileEntry.egdpool_path != NULL))
 328                                 send_init_prng(ctl, RB_PRNG_EGD, ConfigFileEntry.egdpool_path);
 329                         else
 330                                 send_init_prng(ctl, RB_PRNG_DEFAULT, NULL);
 331                 }
 332                 if(ssl_ok && ssl_cert != NULL && ssl_private_key != NULL)
 333                         send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key,
 334                                                ssl_dh_params != NULL ? ssl_dh_params : "");
 335                 ssl_read_ctl(ctl->F, ctl);
 336                 ssl_do_pipe(P2, ctl);
 337
 338         }
 339         return started;
 340 }
 341
 342 static void
 343 ssl_process_zipstats(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 344 {
 345         struct Client *server;
 346         struct ZipStats *zips;
 347         int parc;
 348         char *parv[7];
 349         parc = rb_string_to_array(ctl_buf->buf, parv, 6);
 350         server = find_server(NULL, parv[1]);
 351         if(server == NULL || server->localClient == NULL || !IsCapable(server, CAP_ZIP))
 352                 return;
 353         if(server->localClient->zipstats == NULL)
 354                 server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 355
 356         zips = server->localClient->zipstats;
 357
 358         zips->in += strtoull(parv[2], NULL, 10);
 359         zips->in_wire += strtoull(parv[3], NULL, 10);
 360         zips->out += strtoull(parv[4], NULL, 10);
 361         zips->out_wire += strtoull(parv[5], NULL, 10);
 362
 363         if(zips->in > 0)
 364                 zips->in_ratio = ((double) (zips->in - zips->in_wire) / (double) zips->in) * 100.00;
 365         else
 366                 zips->in_ratio = 0;
 367
 368         if(zips->out > 0)
 369                 zips->out_ratio = ((double) (zips->out - zips->out_wire) / (double) zips->out) * 100.00;
 370         else
 371                 zips->out_ratio = 0;
 372 }
 373
 374 static void
 375 ssl_process_dead_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 376 {
 377         struct Client *client_p;
 378         char reason[256];
 379         int32_t fd;
 380
 381         if(ctl_buf->buflen < 6)
 382                 return;         /* bogus message..drop it.. XXX should warn here */
 383
 384         fd = buf_to_int32(&ctl_buf->buf[1]);
 385         rb_strlcpy(reason, &ctl_buf->buf[5], sizeof(reason));
 386         client_p = find_cli_fd_hash(fd);
 387         if(client_p == NULL)
 388                 return;
 389         if(IsAnyServer(client_p) || IsRegistered(client_p))
 390         {
 391                 /* read any last moment ERROR, QUIT or the like -- jilles */
 392                 if (!strcmp(reason, "Remote host closed the connection"))
 393                         read_packet(client_p->localClient->F, client_p);
 394                 if (IsAnyDead(client_p))
 395                         return;
 396         }
 397         if(IsAnyServer(client_p))
 398         {
 399                 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);
 400                 ilog(L_SERVER, "ssld error for %s: %s", log_client_name(client_p, SHOW_IP), reason);
 401         }
 402         exit_client(client_p, client_p, &me, reason);
 403 }
 404
 405 static void
 406 ssl_process_certfp(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf)
 407 {
 408         struct Client *client_p;
 409         int32_t fd;
 410         uint8_t *certfp;
 411         char *certfp_string;
 412         int i;
 413
 414         if(ctl_buf->buflen != 5 + RB_SSL_CERTFP_LEN)
 415                 return;         /* bogus message..drop it.. XXX should warn here */
 416
 417         fd = buf_to_int32(&ctl_buf->buf[1]);
 418         certfp = (uint8_t *)&ctl_buf->buf[5];
 419         client_p = find_cli_fd_hash(fd);
 420         if(client_p == NULL)
 421                 return;
 422         rb_free(client_p->certfp);
 423         certfp_string = rb_malloc(RB_SSL_CERTFP_LEN * 2 + 1);
 424         for(i = 0; i < RB_SSL_CERTFP_LEN; i++)
 425                 rb_snprintf(certfp_string + 2 * i, 3, "%02x",
 426                                 certfp[i]);
 427         client_p->certfp = certfp_string;
 428 }
 429
 430 static void
 431 ssl_process_cmd_recv(ssl_ctl_t * ctl)
 432 {
 433         static const char *cannot_setup_ssl = "ssld cannot setup ssl, check your certificates and private key";
 434         static const char *no_ssl_or_zlib = "ssld has neither SSL/TLS or zlib support killing all sslds";
 435         rb_dlink_node *ptr, *next;
 436         ssl_ctl_buf_t *ctl_buf;
 437         if(ctl->dead)
 438                 return;
 439         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head)
 440         {
 441                 ctl_buf = ptr->data;
 442                 switch (*ctl_buf->buf)
 443                 {
 444                 case 'N':
 445                         ssl_ok = 0;     /* ssld says it can't do ssl/tls */
 446                         break;
 447                 case 'D':
 448                         ssl_process_dead_fd(ctl, ctl_buf);
 449                         break;
 450                 case 'F':
 451                         ssl_process_certfp(ctl, ctl_buf);
 452                         break;
 453                 case 'S':
 454                         ssl_process_zipstats(ctl, ctl_buf);
 455                         break;
 456                 case 'I':
 457                         ssl_ok = 0;
 458                         ilog(L_MAIN, cannot_setup_ssl);
 459                         sendto_realops_snomask(SNO_GENERAL, L_ALL, cannot_setup_ssl);
 460                 case 'U':
 461                         zlib_ok = 0;
 462                         ssl_ok = 0;
 463                         ilog(L_MAIN, no_ssl_or_zlib);
 464                         sendto_realops_snomask(SNO_GENERAL, L_ALL, no_ssl_or_zlib);
 465                         ssl_killall();
 466                         break;
 467                 case 'z':
 468                         zlib_ok = 0;
 469                         break;
 470                 default:
 471                         ilog(L_MAIN, "Received invalid command from ssld: %s", ctl_buf->buf);
 472                         sendto_realops_snomask(SNO_GENERAL, L_ALL, "Received invalid command from ssld");
 473                         break;
 474                 }
 475                 rb_dlinkDelete(ptr, &ctl->readq);
 476                 rb_free(ctl_buf->buf);
 477                 rb_free(ctl_buf);
 478         }
 479
 480 }
 481
 482
 483 static void
 484 ssl_read_ctl(rb_fde_t * F, void *data)
 485 {
 486         ssl_ctl_buf_t *ctl_buf;
 487         ssl_ctl_t *ctl = data;
 488         int retlen;
 489
 490         if(ctl->dead)
 491                 return;
 492         do
 493         {
 494                 ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 495                 ctl_buf->buf = rb_malloc(READSIZE);
 496                 retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, READSIZE, ctl_buf->F, 4);
 497                 ctl_buf->buflen = retlen;
 498                 if(retlen <= 0)
 499                 {
 500                         rb_free(ctl_buf->buf);
 501                         rb_free(ctl_buf);
 502                 }
 503                 else
 504                         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq);
 505         }
 506         while(retlen > 0);
 507
 508         if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 509         {
 510                 ssl_dead(ctl);
 511                 return;
 512         }
 513         ssl_process_cmd_recv(ctl);
 514         rb_setselect(ctl->F, RB_SELECT_READ, ssl_read_ctl, ctl);
 515 }
 516
 517 static ssl_ctl_t *
 518 which_ssld(void)
 519 {
 520         ssl_ctl_t *ctl, *lowest = NULL;
 521         rb_dlink_node *ptr;
 522
 523         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 524         {
 525                 ctl = ptr->data;
 526                 if(ctl->dead)
 527                         continue;
 528                 if(lowest == NULL)
 529                 {
 530                         lowest = ctl;
 531                         continue;
 532                 }
 533                 if(ctl->cli_count < lowest->cli_count)
 534                         lowest = ctl;
 535         }
 536         return (lowest);
 537 }
 538
 539 static void
 540 ssl_write_ctl(rb_fde_t * F, void *data)
 541 {
 542         ssl_ctl_t *ctl = data;
 543         ssl_ctl_buf_t *ctl_buf;
 544         rb_dlink_node *ptr, *next;
 545         int retlen, x;
 546
 547         if(ctl->dead)
 548                 return;
 549
 550         RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
 551         {
 552                 ctl_buf = ptr->data;
 553                 /* in theory unix sock_dgram shouldn't ever short write this.. */
 554                 retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, ctl_buf->buflen, ctl->pid);
 555                 if(retlen > 0)
 556                 {
 557                         rb_dlinkDelete(ptr, &ctl->writeq);
 558                         for(x = 0; x < ctl_buf->nfds; x++)
 559                                 rb_close(ctl_buf->F[x]);
 560                         rb_free(ctl_buf->buf);
 561                         rb_free(ctl_buf);
 562
 563                 }
 564                 if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
 565                 {
 566                         ssl_dead(ctl);
 567                         return;
 568                 }
 569                 else
 570                 {
 571                         rb_setselect(ctl->F, RB_SELECT_WRITE, ssl_write_ctl, ctl);
 572                 }
 573         }
 574 }
 575
 576 static void
 577 ssl_cmd_write_queue(ssl_ctl_t * ctl, rb_fde_t ** F, int count, const void *buf, size_t buflen)
 578 {
 579         ssl_ctl_buf_t *ctl_buf;
 580         int x;
 581
 582         /* don't bother */
 583         if(ctl->dead)
 584                 return;
 585
 586         ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t));
 587         ctl_buf->buf = rb_malloc(buflen);
 588         memcpy(ctl_buf->buf, buf, buflen);
 589         ctl_buf->buflen = buflen;
 590
 591         for(x = 0; x < count && x < MAXPASSFD; x++)
 592         {
 593                 ctl_buf->F[x] = F[x];
 594         }
 595         ctl_buf->nfds = count;
 596         rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq);
 597         ssl_write_ctl(ctl->F, ctl);
 598 }
 599
 600
 601 static void
 602 send_new_ssl_certs_one(ssl_ctl_t * ctl, const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 603 {
 604         size_t len;
 605
 606         len = strlen(ssl_cert) + strlen(ssl_private_key) + strlen(ssl_dh_params) + 5;
 607         if(len > sizeof(tmpbuf))
 608         {
 609                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 610                                        "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 611                                        len, sizeof(tmpbuf));
 612                 ilog(L_MAIN,
 613                      "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...",
 614                      len, sizeof(tmpbuf));
 615                 return;
 616         }
 617         len = rb_snprintf(tmpbuf, sizeof(tmpbuf), "K%c%s%c%s%c%s%c", nul, ssl_cert, nul,
 618                           ssl_private_key, nul, ssl_dh_params, nul);
 619         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 620 }
 621
 622 static void
 623 send_init_prng(ssl_ctl_t * ctl, prng_seed_t seedtype, const char *path)
 624 {
 625         size_t len;
 626         const char *s;
 627         uint8_t seed = (uint8_t) seedtype;
 628
 629         if(path == NULL)
 630                 s = "";
 631         else
 632                 s = path;
 633
 634         len = strlen(s) + 3;
 635         if(len > sizeof(tmpbuf))
 636         {
 637                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 638                                        "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 639                                        len, sizeof(tmpbuf));
 640                 ilog(L_MAIN,
 641                      "Parameters for send_init_prng too long (%zd > %zd) to pass to ssld, not sending...",
 642                      len, sizeof(tmpbuf));
 643                 return;
 644
 645         }
 646         len = rb_snprintf(tmpbuf, sizeof(tmpbuf), "I%c%s%c", seed, s, nul);
 647         ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, len);
 648 }
 649
 650 void
 651 send_new_ssl_certs(const char *ssl_cert, const char *ssl_private_key, const char *ssl_dh_params)
 652 {
 653         rb_dlink_node *ptr;
 654         if(ssl_cert == NULL || ssl_private_key == NULL || ssl_dh_params == NULL)
 655         {
 656                 ssl_ok = 0;
 657                 return;
 658         }
 659         RB_DLINK_FOREACH(ptr, ssl_daemons.head)
 660         {
 661                 ssl_ctl_t *ctl = ptr->data;
 662                 send_new_ssl_certs_one(ctl, ssl_cert, ssl_private_key, ssl_dh_params);
 663         }
 664 }
 665
 666
 667 ssl_ctl_t *
 668 start_ssld_accept(rb_fde_t * sslF, rb_fde_t * plainF, int32_t id)
 669 {
 670         rb_fde_t *F[2];
 671         ssl_ctl_t *ctl;
 672         char buf[5];
 673         F[0] = sslF;
 674         F[1] = plainF;
 675
 676         buf[0] = 'A';
 677         int32_to_buf(&buf[1], id);
 678         ctl = which_ssld();
 679         ctl->cli_count++;
 680         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 681         return ctl;
 682 }
 683
 684 ssl_ctl_t *
 685 start_ssld_connect(rb_fde_t * sslF, rb_fde_t * plainF, int32_t id)
 686 {
 687         rb_fde_t *F[2];
 688         ssl_ctl_t *ctl;
 689         char buf[5];
 690         F[0] = sslF;
 691         F[1] = plainF;
 692
 693         buf[0] = 'C';
 694         int32_to_buf(&buf[1], id);
 695
 696         ctl = which_ssld();
 697         ctl->cli_count++;
 698         ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf));
 699         return ctl;
 700 }
 701
 702 void
 703 ssld_decrement_clicount(ssl_ctl_t * ctl)
 704 {
 705         if(ctl == NULL)
 706                 return;
 707
 708         ctl->cli_count--;
 709         if(ctl->dead && !ctl->cli_count)
 710         {
 711                 free_ssl_daemon(ctl);
 712         }
 713 }
 714
 715 /*
 716  * what we end up sending to the ssld process for ziplinks is the following
 717  * Z[ourfd][level][RECVQ]
 718  * Z = ziplinks command = buf[0]
 719  * ourfd = Our end of the socketpair = buf[1..4]
 720  * level = zip level buf[5]
 721  * recvqlen = our recvq len = buf[6-7]
 722  * recvq = any data we read prior to starting ziplinks
 723  */
 724 void
 725 start_zlib_session(void *data)
 726 {
 727         struct Client *server = (struct Client *) data;
 728         uint16_t recvqlen;
 729         uint8_t level;
 730         void *xbuf;
 731
 732         rb_fde_t *F[2];
 733         rb_fde_t *xF1, *xF2;
 734         char *buf;
 735         char buf2[9];
 736         void *recvq_start;
 737
 738         size_t hdr = (sizeof(uint8_t) * 2) + sizeof(int32_t);
 739         size_t len;
 740         int cpylen, left;
 741
 742         server->localClient->event = NULL;
 743
 744         recvqlen = rb_linebuf_len(&server->localClient->buf_recvq);
 745
 746         len = recvqlen + hdr;
 747
 748         if(len > READBUF_SIZE)
 749         {
 750                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 751                                        "ssld - attempted to pass message of %zd len, max len %d, giving up",
 752                                        len, READBUF_SIZE);
 753                 ilog(L_MAIN, "ssld - attempted to pass message of %zd len, max len %d, giving up", len, READBUF_SIZE);
 754                 exit_client(server, server, server, "ssld readbuf exceeded");
 755                 return;
 756         }
 757
 758         buf = rb_malloc(len);
 759         level = ConfigFileEntry.compression_level;
 760
 761         int32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 762         buf[5] = (char) level;
 763
 764         recvq_start = &buf[6];
 765         server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats));
 766
 767         xbuf = recvq_start;
 768         left = recvqlen;
 769
 770         do
 771         {
 772                 cpylen = rb_linebuf_get(&server->localClient->buf_recvq, xbuf, left, LINEBUF_PARTIAL, LINEBUF_RAW);
 773                 left -= cpylen;
 774                 xbuf = (void *) (((uintptr_t) xbuf) + cpylen);
 775         }
 776         while(cpylen > 0);
 777
 778         /* Pass the socket to ssld. */
 779         *buf = 'Z';
 780         if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF1, &xF2, "Initial zlib socketpairs") == -1)
 781         {
 782                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Error creating zlib socketpair - %s", strerror(errno));
 783                 ilog(L_MAIN, "Error creating zlib socketpairs - %s", strerror(errno));
 784                 exit_client(server, server, server, "Error creating zlib socketpair");
 785                 return;
 786         }
 787
 788         if(IsSSL(server))
 789         {
 790                 /* tell ssld the new connid for the ssl part*/
 791                 buf2[0] = 'Y';
 792                 int32_to_buf(&buf2[1], rb_get_fd(server->localClient->F));
 793                 int32_to_buf(&buf2[5], rb_get_fd(xF2));
 794                 ssl_cmd_write_queue(server->localClient->ssl_ctl, NULL, 0, buf2, sizeof(buf2));
 795         }
 796
 797
 798         F[0] = server->localClient->F;
 799         F[1] = xF1;
 800         del_from_cli_fd_hash(server);
 801         server->localClient->F = xF2;
 802         /* need to redo as what we did before isn't valid now */
 803         int32_to_buf(&buf[1], rb_get_fd(server->localClient->F));
 804         add_to_cli_fd_hash(server);
 805
 806         server->localClient->z_ctl = which_ssld();
 807         server->localClient->z_ctl->cli_count++;
 808         ssl_cmd_write_queue(server->localClient->z_ctl, F, 2, buf, len);
 809         rb_free(buf);
 810 }
 811
 812 static void
 813 collect_zipstats(void *unused)
 814 {
 815         rb_dlink_node *ptr;
 816         struct Client *target_p;
 817         char buf[sizeof(uint8_t) + sizeof(int32_t) + HOSTLEN];
 818         void *odata;
 819         size_t len;
 820         int32_t id;
 821
 822         buf[0] = 'S';
 823         odata = buf + sizeof(uint8_t) + sizeof(int32_t);
 824
 825         RB_DLINK_FOREACH(ptr, serv_list.head)
 826         {
 827                 target_p = ptr->data;
 828                 if(IsCapable(target_p, CAP_ZIP))
 829                 {
 830                         len = sizeof(uint8_t) + sizeof(uint32_t);
 831
 832                         id = rb_get_fd(target_p->localClient->F);
 833                         int32_to_buf(&buf[1], rb_get_fd(target_p->localClient->F));
 834                         rb_strlcpy(odata, target_p->name, (sizeof(buf) - len));
 835                         len += strlen(odata) + 1;       /* Get the \0 as well */
 836                         ssl_cmd_write_queue(target_p->localClient->z_ctl, NULL, 0, buf, len);
 837                 }
 838         }
 839 }
 840
 841 static void
 842 cleanup_dead_ssl(void *unused)
 843 {
 844         rb_dlink_node *ptr, *next;
 845         ssl_ctl_t *ctl;
 846         RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head)
 847         {
 848                 ctl = ptr->data;
 849                 if(ctl->dead && !ctl->cli_count)
 850                 {
 851                         free_ssl_daemon(ctl);
 852                 }
 853         }
 854 }
 855
 856 int
 857 get_ssld_count(void)
 858 {
 859         return ssld_count;
 860 }
 861
 862 void
 863 init_ssld(void)
 864 {
 865         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 866         rb_event_addish("cleanup_dead_ssld", cleanup_dead_ssl, NULL, 1200);
 867 }