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