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