static int dispatch_command(client_conn_t *conn, enum commands cmd, const char *argument) { int ret = 0; client_conn_t *dup_conn = (client_conn_t *) malloc(sizeof(struct client_conn_tag)); if(!dup_conn) { logg("!Can't allocate memory for client_conn\n"); return -1; } memcpy(dup_conn, conn, sizeof(*conn)); dup_conn->cmdtype = cmd; if(cl_engine_addref(dup_conn->engine)) { logg("!cl_engine_addref() failed\n"); free(dup_conn); return -1; } dup_conn->scanfd = -1; switch (cmd) { case COMMAND_FILDES: if (conn->scanfd == -1) { conn_reply_error(dup_conn, "No file descriptor received."); ret = 1; } dup_conn->scanfd = conn->scanfd; /* consume FD */ conn->scanfd = -1; break; case COMMAND_SCAN: case COMMAND_CONTSCAN: case COMMAND_MULTISCAN: dup_conn->filename = strdup(argument); if (!dup_conn->filename) { logg("!Failed to allocate memory for filename\n"); ret = -1; } break; case COMMAND_INSTREAMSCAN: dup_conn->scanfd = conn->scanfd; conn->scanfd = -1; break; case COMMAND_STREAM: case COMMAND_STATS: /* just dispatch the command */ break; } if(!ret && !thrmgr_group_dispatch(dup_conn->thrpool, dup_conn->group, dup_conn)) { logg("!thread dispatch failed\n"); ret = -2; } if (ret) { cl_engine_free(dup_conn->engine); free(dup_conn); } return ret; }
/* returns: * <0 for error * -1 out of memory * -2 other * 0 for async dispatched * 1 for command completed (connection can be closed) */ int execute_or_dispatch_command(client_conn_t *conn, enum commands cmd, const char *argument) { int desc = conn->sd; char term = conn->term; const struct cl_engine *engine = conn->engine; /* execute commands that can be executed quickly on the recvloop thread, * these must: * - not involve any operation that can block for a long time, such as disk * I/O * - send of atomic message is allowed. * Dispatch other commands */ if (conn->group) { switch (cmd) { case COMMAND_FILDES: case COMMAND_SCAN: case COMMAND_END: case COMMAND_INSTREAM: case COMMAND_INSTREAMSCAN: case COMMAND_VERSION: case COMMAND_PING: case COMMAND_STATS: case COMMAND_COMMANDS: /* These commands are accepted inside IDSESSION */ break; default: /* these commands are not recognized inside an IDSESSION */ conn_reply_error(conn, "Command invalid inside IDSESSION."); logg("$SESSION: command is not valid inside IDSESSION: %d\n", cmd); conn->group = NULL; return 1; } } switch (cmd) { case COMMAND_SHUTDOWN: pthread_mutex_lock(&exit_mutex); progexit = 1; pthread_mutex_unlock(&exit_mutex); return 1; case COMMAND_RELOAD: pthread_mutex_lock(&reload_mutex); reload = 1; pthread_mutex_unlock(&reload_mutex); mdprintf(desc, "RELOADING%c", term); /* we set reload flag, and we'll reload before closing the * connection */ return 1; case COMMAND_PING: if (conn->group) mdprintf(desc, "%u: PONG%c", conn->id, term); else mdprintf(desc, "PONG%c", term); return conn->group ? 0 : 1; case COMMAND_VERSION: { if (conn->group) mdprintf(desc, "%u: ", conn->id); print_ver(desc, conn->term, engine); return conn->group ? 0 : 1; } case COMMAND_COMMANDS: { if (conn->group) mdprintf(desc, "%u: ", conn->id); print_commands(desc, conn->term, engine); return conn->group ? 0 : 1; } case COMMAND_DETSTATSCLEAR: { detstats_clear(); return 1; } case COMMAND_DETSTATS: { detstats_print(desc, conn->term); return 1; } case COMMAND_INSTREAM: { int rc = cli_gentempfd(optget(conn->opts, "TemporaryDirectory")->strarg, &conn->filename, &conn->scanfd); if (rc != CL_SUCCESS) return rc; conn->quota = optget(conn->opts, "StreamMaxLength")->numarg; conn->mode = MODE_STREAM; return 0; } case COMMAND_STREAM: case COMMAND_MULTISCAN: case COMMAND_CONTSCAN: case COMMAND_STATS: case COMMAND_FILDES: case COMMAND_SCAN: case COMMAND_INSTREAMSCAN: return dispatch_command(conn, cmd, argument); case COMMAND_IDSESSION: conn->group = thrmgr_group_new(); if (!conn->group) return CL_EMEM; return 0; case COMMAND_END: if (!conn->group) { /* end without idsession? */ conn_reply_single(conn, NULL, "UNKNOWN COMMAND"); return 1; } /* need to close connection if we were last in group */ return 1; /*case COMMAND_UNKNOWN:*/ default: conn_reply_single(conn, NULL, "UNKNOWN COMMAND"); return 1; } }
/* returns * -1 on fatal error (shutdown) * 0 on ok * >0 errors encountered */ int command(client_conn_t *conn, int *virus) { int desc = conn->sd; struct cl_engine *engine = conn->engine; unsigned int options = conn->options; const struct optstruct *opts = conn->opts; int type = -1; /* TODO: make this enum */ int maxdirrec; int ret = 0; int flags = CLI_FTW_STD; struct scan_cb_data scandata; struct cli_ftw_cbdata data; unsigned ok, error, total; STATBUF sb; jobgroup_t *group = NULL; if (thrmgr_group_need_terminate(conn->group)) { logg("$Client disconnected while command was active\n"); if (conn->scanfd != -1) close(conn->scanfd); return 1; } thrmgr_setactiveengine(engine); data.data = &scandata; memset(&scandata, 0, sizeof(scandata)); scandata.id = conn->id; scandata.group = conn->group; scandata.odesc = desc; scandata.conn = conn; scandata.options = options; scandata.engine = engine; scandata.opts = opts; scandata.thr_pool = conn->thrpool; scandata.toplevel_path = conn->filename; switch (conn->cmdtype) { case COMMAND_SCAN: thrmgr_setactivetask(NULL, "SCAN"); type = TYPE_SCAN; break; case COMMAND_CONTSCAN: thrmgr_setactivetask(NULL, "CONTSCAN"); type = TYPE_CONTSCAN; break; case COMMAND_MULTISCAN: { int multiscan, max, alive; /* use MULTISCAN only for directories (bb #1869) */ if (STAT(conn->filename, &sb) == 0 && !S_ISDIR(sb.st_mode)) { thrmgr_setactivetask(NULL, "CONTSCAN"); type = TYPE_CONTSCAN; break; } pthread_mutex_lock(&conn->thrpool->pool_mutex); multiscan = conn->thrpool->thr_multiscan; max = conn->thrpool->thr_max; if (multiscan+1 < max) conn->thrpool->thr_multiscan = multiscan+1; else { alive = conn->thrpool->thr_alive; ret = -1; } pthread_mutex_unlock(&conn->thrpool->pool_mutex); if (ret) { /* multiscan has 1 control thread, so there needs to be at least 1 threads that is a non-multiscan controlthread to scan and make progress. */ logg("^Not enough threads for multiscan. Max: %d, Alive: %d, Multiscan: %d+1\n", max, alive, multiscan); conn_reply(conn, conn->filename, "Not enough threads for multiscan. Increase MaxThreads.", "ERROR"); return 1; } flags &= ~CLI_FTW_NEED_STAT; thrmgr_setactivetask(NULL, "MULTISCAN"); type = TYPE_MULTISCAN; scandata.group = group = thrmgr_group_new(); if (!group) { if(optget(opts, "ExitOnOOM")->enabled) return -1; else return 1; } break; } case COMMAND_MULTISCANFILE: thrmgr_setactivetask(NULL, "MULTISCANFILE"); scandata.group = NULL; scandata.type = TYPE_SCAN; scandata.thr_pool = NULL; /* TODO: check ret value */ ret = scan_callback(NULL, conn->filename, conn->filename, visit_file, &data); /* callback freed it */ conn->filename = NULL; *virus = scandata.infected; if (ret == CL_BREAK) { thrmgr_group_terminate(conn->group); return 1; } return scandata.errors > 0 ? scandata.errors : 0; case COMMAND_FILDES: thrmgr_setactivetask(NULL, "FILDES"); #ifdef HAVE_FD_PASSING if (conn->scanfd == -1) { conn_reply_error(conn, "FILDES: didn't receive file descriptor."); return 1; } else { ret = scanfd(conn, NULL, engine, options, opts, desc, 0); if (ret == CL_VIRUS) { *virus = 1; ret = 0; } else if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) ret = -1; else ret = 1; } else if (ret == CL_ETIMEOUT) { thrmgr_group_terminate(conn->group); ret = 1; } else ret = 0; logg("$Closed fd %d\n", conn->scanfd); close(conn->scanfd); } return ret; #else conn_reply_error(conn, "FILDES support not compiled in."); close(conn->scanfd); return 0; #endif case COMMAND_STATS: thrmgr_setactivetask(NULL, "STATS"); if (conn->group) mdprintf(desc, "%u: ", conn->id); thrmgr_printstats(desc, conn->term); return 0; case COMMAND_STREAM: thrmgr_setactivetask(NULL, "STREAM"); ret = scanstream(desc, NULL, engine, options, opts, conn->term); if (ret == CL_VIRUS) *virus = 1; if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) return -1; else return 1; } return 0; case COMMAND_INSTREAMSCAN: thrmgr_setactivetask(NULL, "INSTREAM"); ret = scanfd(conn, NULL, engine, options, opts, desc, 1); if (ret == CL_VIRUS) { *virus = 1; ret = 0; } else if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) ret = -1; else ret = 1; } else if (ret == CL_ETIMEOUT) { thrmgr_group_terminate(conn->group); ret = 1; } else ret = 0; if (ftruncate(conn->scanfd, 0) == -1) { /* not serious, we're going to close it and unlink it anyway */ logg("*ftruncate failed: %d\n", errno); } close(conn->scanfd); conn->scanfd = -1; cli_unlink(conn->filename); return ret; default: logg("!Invalid command distpached: %d\n", conn->cmdtype); return 1; } scandata.type = type; maxdirrec = optget(opts, "MaxDirectoryRecursion")->numarg; if (optget(opts, "FollowDirectorySymlinks")->enabled) flags |= CLI_FTW_FOLLOW_DIR_SYMLINK; if (optget(opts, "FollowFileSymlinks")->enabled) flags |= CLI_FTW_FOLLOW_FILE_SYMLINK; if(!optget(opts, "CrossFilesystems")->enabled) if(STAT(conn->filename, &sb) == 0) scandata.dev = sb.st_dev; ret = cli_ftw(conn->filename, flags, maxdirrec ? maxdirrec : INT_MAX, scan_callback, &data, scan_pathchk); if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) return -1; else return 1; } if (scandata.group && type == TYPE_MULTISCAN) { thrmgr_group_waitforall(group, &ok, &error, &total); pthread_mutex_lock(&conn->thrpool->pool_mutex); conn->thrpool->thr_multiscan--; pthread_mutex_unlock(&conn->thrpool->pool_mutex); } else { error = scandata.errors; total = scandata.total; ok = total - error - scandata.infected; } if (ok + error == total && (error != total)) { if (conn_reply_single(conn, conn->filename, "OK") == -1) ret = CL_ETIMEOUT; } *virus = total - (ok + error); if (ret == CL_ETIMEOUT) thrmgr_group_terminate(conn->group); return error; }
int recvloop_th(int *socketds, unsigned nsockets, struct cl_engine *engine, unsigned int dboptions, const struct optstruct *opts) { int max_threads, max_queue, readtimeout, ret = 0; unsigned int options = 0; char timestr[32]; #ifndef _WIN32 struct sigaction sigact; sigset_t sigset; struct rlimit rlim; #endif mode_t old_umask; const struct optstruct *opt; char buff[BUFFSIZE + 1]; pid_t mainpid; int idletimeout; unsigned long long val; size_t i, j, rr_last = 0; pthread_t accept_th; pthread_mutex_t fds_mutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t recvfds_mutex = PTHREAD_MUTEX_INITIALIZER; struct acceptdata acceptdata = ACCEPTDATA_INIT(&fds_mutex, &recvfds_mutex); struct fd_data *fds = &acceptdata.recv_fds; time_t start_time, current_time; unsigned int selfchk; threadpool_t *thr_pool; #if defined(FANOTIFY) || defined(CLAMAUTH) pthread_t fan_pid; pthread_attr_t fan_attr; struct thrarg *tharg = NULL; /* shut up gcc */ #endif #ifndef _WIN32 memset(&sigact, 0, sizeof(struct sigaction)); #endif /* set up limits */ if((opt = optget(opts, "MaxScanSize"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_SCANSIZE, opt->numarg))) { logg("!cl_engine_set_num(CL_ENGINE_MAX_SCANSIZE) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_SCANSIZE, NULL); if(val) logg("Limits: Global size limit set to %llu bytes.\n", val); else logg("^Limits: Global size limit protection disabled.\n"); if((opt = optget(opts, "MaxFileSize"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_FILESIZE, opt->numarg))) { logg("!cl_engine_set_num(CL_ENGINE_MAX_FILESIZE) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_FILESIZE, NULL); if(val) logg("Limits: File size limit set to %llu bytes.\n", val); else logg("^Limits: File size limit protection disabled.\n"); #ifndef _WIN32 if(getrlimit(RLIMIT_FSIZE, &rlim) == 0) { if(rlim.rlim_cur < (rlim_t) cl_engine_get_num(engine, CL_ENGINE_MAX_FILESIZE, NULL)) logg("^System limit for file size is lower than engine->maxfilesize\n"); if(rlim.rlim_cur < (rlim_t) cl_engine_get_num(engine, CL_ENGINE_MAX_SCANSIZE, NULL)) logg("^System limit for file size is lower than engine->maxscansize\n"); } else { logg("^Cannot obtain resource limits for file size\n"); } #endif if((opt = optget(opts, "MaxRecursion"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_RECURSION, opt->numarg))) { logg("!cl_engine_set_num(CL_ENGINE_MAX_RECURSION) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_RECURSION, NULL); if(val) logg("Limits: Recursion level limit set to %u.\n", (unsigned int) val); else logg("^Limits: Recursion level limit protection disabled.\n"); if((opt = optget(opts, "MaxFiles"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_FILES, opt->numarg))) { logg("!cl_engine_set_num(CL_ENGINE_MAX_FILES) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_FILES, NULL); if(val) logg("Limits: Files limit set to %u.\n", (unsigned int) val); else logg("^Limits: Files limit protection disabled.\n"); #ifndef _WIN32 if (getrlimit(RLIMIT_CORE, &rlim) == 0) { logg("*Limits: Core-dump limit is %lu.\n", (unsigned long)rlim.rlim_cur); } #endif /* Engine max sizes */ if((opt = optget(opts, "MaxEmbeddedPE"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_EMBEDDEDPE, opt->numarg))) { logg("!cli_engine_set_num(CL_ENGINE_MAX_EMBEDDEDPE) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_EMBEDDEDPE, NULL); logg("Limits: MaxEmbeddedPE limit set to %llu bytes.\n", val); if((opt = optget(opts, "MaxHTMLNormalize"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_HTMLNORMALIZE, opt->numarg))) { logg("!cli_engine_set_num(CL_ENGINE_MAX_HTMLNORMALIZE) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_HTMLNORMALIZE, NULL); logg("Limits: MaxHTMLNormalize limit set to %llu bytes.\n", val); if((opt = optget(opts, "MaxHTMLNoTags"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_HTMLNOTAGS, opt->numarg))) { logg("!cli_engine_set_num(CL_ENGINE_MAX_HTMLNOTAGS) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_HTMLNOTAGS, NULL); logg("Limits: MaxHTMLNoTags limit set to %llu bytes.\n", val); if((opt = optget(opts, "MaxScriptNormalize"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_SCRIPTNORMALIZE, opt->numarg))) { logg("!cli_engine_set_num(CL_ENGINE_MAX_SCRIPTNORMALIZE) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_SCRIPTNORMALIZE, NULL); logg("Limits: MaxScriptNormalize limit set to %llu bytes.\n", val); if((opt = optget(opts, "MaxZipTypeRcg"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_ZIPTYPERCG, opt->numarg))) { logg("!cli_engine_set_num(CL_ENGINE_MAX_ZIPTYPERCG) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_ZIPTYPERCG, NULL); logg("Limits: MaxZipTypeRcg limit set to %llu bytes.\n", val); if((opt = optget(opts, "MaxPartitions"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_PARTITIONS, opt->numarg))) { logg("!cli_engine_set_num(MaxPartitions) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_PARTITIONS, NULL); logg("Limits: MaxPartitions limit set to %llu.\n", val); if((opt = optget(opts, "MaxIconsPE"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MAX_ICONSPE, opt->numarg))) { logg("!cli_engine_set_num(MaxIconsPE) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MAX_ICONSPE, NULL); logg("Limits: MaxIconsPE limit set to %llu.\n", val); if((opt = optget(opts, "PCREMatchLimit"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_PCRE_MATCH_LIMIT, opt->numarg))) { logg("!cli_engine_set_num(PCREMatchLimit) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_PCRE_MATCH_LIMIT, NULL); logg("Limits: PCREMatchLimit limit set to %llu.\n", val); if((opt = optget(opts, "PCRERecMatchLimit"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_PCRE_RECMATCH_LIMIT, opt->numarg))) { logg("!cli_engine_set_num(PCRERecMatchLimit) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_PCRE_RECMATCH_LIMIT, NULL); logg("Limits: PCRERecMatchLimit limit set to %llu.\n", val); if((opt = optget(opts, "PCREMaxFileSize"))->active) { if((ret = cl_engine_set_num(engine, CL_ENGINE_PCRE_MAX_FILESIZE, opt->numarg))) { logg("!cli_engine_set_num(PCREMaxFileSize) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_PCRE_MAX_FILESIZE, NULL); logg("Limits: PCREMaxFileSize limit set to %llu.\n", val); if(optget(opts, "ScanArchive")->enabled) { logg("Archive support enabled.\n"); options |= CL_SCAN_ARCHIVE; if(optget(opts, "ArchiveBlockEncrypted")->enabled) { logg("Archive: Blocking encrypted archives.\n"); options |= CL_SCAN_BLOCKENCRYPTED; } } else { logg("Archive support disabled.\n"); } if(optget(opts, "AlgorithmicDetection")->enabled) { logg("Algorithmic detection enabled.\n"); options |= CL_SCAN_ALGORITHMIC; } else { logg("Algorithmic detection disabled.\n"); } if(optget(opts, "ScanPE")->enabled) { logg("Portable Executable support enabled.\n"); options |= CL_SCAN_PE; } else { logg("Portable Executable support disabled.\n"); } if(optget(opts, "ScanELF")->enabled) { logg("ELF support enabled.\n"); options |= CL_SCAN_ELF; } else { logg("ELF support disabled.\n"); } if(optget(opts, "ScanPE")->enabled || optget(opts, "ScanELF")->enabled) { if(optget(opts, "DetectBrokenExecutables")->enabled) { logg("Detection of broken executables enabled.\n"); options |= CL_SCAN_BLOCKBROKEN; } } if(optget(opts, "ScanMail")->enabled) { logg("Mail files support enabled.\n"); options |= CL_SCAN_MAIL; if(optget(opts, "ScanPartialMessages")->enabled) { logg("Mail: RFC1341 handling enabled.\n"); options |= CL_SCAN_PARTIAL_MESSAGE; } } else { logg("Mail files support disabled.\n"); } if(optget(opts, "ScanOLE2")->enabled) { logg("OLE2 support enabled.\n"); options |= CL_SCAN_OLE2; if(optget(opts, "OLE2BlockMacros")->enabled) { logg("OLE2: Blocking all VBA macros.\n"); options |= CL_SCAN_BLOCKMACROS; } } else { logg("OLE2 support disabled.\n"); } if(optget(opts, "ScanPDF")->enabled) { logg("PDF support enabled.\n"); options |= CL_SCAN_PDF; } else { logg("PDF support disabled.\n"); } if(optget(opts, "ScanSWF")->enabled) { logg("SWF support enabled.\n"); options |= CL_SCAN_SWF; } else { logg("SWF support disabled.\n"); } if(optget(opts, "ScanHTML")->enabled) { logg("HTML support enabled.\n"); options |= CL_SCAN_HTML; } else { logg("HTML support disabled.\n"); } if(optget(opts,"PhishingScanURLs")->enabled) { if(optget(opts,"PhishingAlwaysBlockCloak")->enabled) { options |= CL_SCAN_PHISHING_BLOCKCLOAK; logg("Phishing: Always checking for cloaked urls\n"); } if(optget(opts,"PhishingAlwaysBlockSSLMismatch")->enabled) { options |= CL_SCAN_PHISHING_BLOCKSSL; logg("Phishing: Always checking for ssl mismatches\n"); } } if(optget(opts,"PartitionIntersection")->enabled) { options |= CL_SCAN_PARTITION_INTXN; logg("Raw DMG: Always checking for partitons intersections\n"); } if(optget(opts,"HeuristicScanPrecedence")->enabled) { options |= CL_SCAN_HEURISTIC_PRECEDENCE; logg("Heuristic: precedence enabled\n"); } if(optget(opts, "StructuredDataDetection")->enabled) { options |= CL_SCAN_STRUCTURED; if((opt = optget(opts, "StructuredMinCreditCardCount"))->enabled) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MIN_CC_COUNT, opt->numarg))) { logg("!cl_engine_set_num(CL_ENGINE_MIN_CC_COUNT) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MIN_CC_COUNT, NULL); logg("Structured: Minimum Credit Card Number Count set to %u\n", (unsigned int) val); if((opt = optget(opts, "StructuredMinSSNCount"))->enabled) { if((ret = cl_engine_set_num(engine, CL_ENGINE_MIN_SSN_COUNT, opt->numarg))) { logg("!cl_engine_set_num(CL_ENGINE_MIN_SSN_COUNT) failed: %s\n", cl_strerror(ret)); cl_engine_free(engine); return 1; } } val = cl_engine_get_num(engine, CL_ENGINE_MIN_SSN_COUNT, NULL); logg("Structured: Minimum Social Security Number Count set to %u\n", (unsigned int) val); if(optget(opts, "StructuredSSNFormatNormal")->enabled) options |= CL_SCAN_STRUCTURED_SSN_NORMAL; if(optget(opts, "StructuredSSNFormatStripped")->enabled) options |= CL_SCAN_STRUCTURED_SSN_STRIPPED; } #ifdef HAVE__INTERNAL__SHA_COLLECT if(optget(opts, "DevCollectHashes")->enabled) options |= CL_SCAN_INTERNAL_COLLECT_SHA; #endif selfchk = optget(opts, "SelfCheck")->numarg; if(!selfchk) { logg("Self checking disabled.\n"); } else { logg("Self checking every %u seconds.\n", selfchk); } /* save the PID */ mainpid = getpid(); if((opt = optget(opts, "PidFile"))->enabled) { FILE *fd; old_umask = umask(0002); if((fd = fopen(opt->strarg, "w")) == NULL) { logg("!Can't save PID in file %s\n", opt->strarg); } else { if (fprintf(fd, "%u\n", (unsigned int) mainpid)<0) { logg("!Can't save PID in file %s\n", opt->strarg); } fclose(fd); } umask(old_umask); } logg("*Listening daemon: PID: %u\n", (unsigned int) mainpid); max_threads = optget(opts, "MaxThreads")->numarg; max_queue = optget(opts, "MaxQueue")->numarg; acceptdata.commandtimeout = optget(opts, "CommandReadTimeout")->numarg; readtimeout = optget(opts, "ReadTimeout")->numarg; #if !defined(_WIN32) && defined(RLIMIT_NOFILE) if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) { /* don't warn if default value is too high, silently fix it */ unsigned maxrec; int max_max_queue; unsigned warn = optget(opts, "MaxQueue")->active; const unsigned clamdfiles = 6; /* Condition to not run out of file descriptors: * MaxThreads * MaxRecursion + (MaxQueue - MaxThreads) + CLAMDFILES < RLIMIT_NOFILE * CLAMDFILES is 6: 3 standard FD + logfile + 2 FD for reloading the DB * */ #ifdef C_SOLARIS #ifdef HAVE_ENABLE_EXTENDED_FILE_STDIO if (enable_extended_FILE_stdio(-1, -1) == -1) { logg("^Unable to set extended FILE stdio, clamd will be limited to max 256 open files\n"); rlim.rlim_cur = rlim.rlim_cur > 255 ? 255 : rlim.rlim_cur; } #elif !defined(_LP64) if (rlim.rlim_cur > 255) { rlim.rlim_cur = 255; logg("^Solaris only supports 256 open files for 32-bit processes, you need at least Solaris 10u4, or compile as 64-bit to support more!\n"); } #endif #endif opt = optget(opts,"MaxRecursion"); maxrec = opt->numarg; max_max_queue = rlim.rlim_cur - maxrec * max_threads - clamdfiles + max_threads; if (max_queue < max_threads) { max_queue = max_threads; if (warn) logg("^MaxQueue value too low, increasing to: %d\n", max_queue); } if (max_max_queue < max_threads) { logg("^MaxThreads * MaxRecursion is too high: %d, open file descriptor limit is: %lu\n", maxrec*max_threads, (unsigned long)rlim.rlim_cur); max_max_queue = max_threads; } if (max_queue > max_max_queue) { max_queue = max_max_queue; if (warn) logg("^MaxQueue value too high, lowering to: %d\n", max_queue); } else if (max_queue < 2*max_threads && max_queue < max_max_queue) { max_queue = 2*max_threads; if (max_queue > max_max_queue) max_queue = max_max_queue; /* always warn here */ logg("^MaxQueue is lower than twice MaxThreads, increasing to: %d\n", max_queue); } } #endif logg("*MaxQueue set to: %d\n", max_queue); acceptdata.max_queue = max_queue; if(optget(opts, "ScanOnAccess")->enabled) #if defined(FANOTIFY) || defined(CLAMAUTH) { do { if(pthread_attr_init(&fan_attr)) break; pthread_attr_setdetachstate(&fan_attr, PTHREAD_CREATE_JOINABLE); if(!(tharg = (struct thrarg *) malloc(sizeof(struct thrarg)))) break; tharg->opts = opts; tharg->engine = engine; tharg->options = options; if(!pthread_create(&fan_pid, &fan_attr, onas_fan_th, tharg)) break; free(tharg); tharg=NULL; } while(0); if (!tharg) logg("!Unable to start on-access scan\n"); } #else logg("!On-access scan is not available\n"); #endif #ifndef _WIN32 /* set up signal handling */ sigfillset(&sigset); sigdelset(&sigset, SIGINT); sigdelset(&sigset, SIGTERM); sigdelset(&sigset, SIGSEGV); sigdelset(&sigset, SIGHUP); sigdelset(&sigset, SIGPIPE); sigdelset(&sigset, SIGUSR2); /* The behavior of a process is undefined after it ignores a * SIGFPE, SIGILL, SIGSEGV, or SIGBUS signal */ sigdelset(&sigset, SIGFPE); sigdelset(&sigset, SIGILL); sigdelset(&sigset, SIGSEGV); #ifdef SIGBUS sigdelset(&sigset, SIGBUS); #endif sigdelset(&sigset, SIGTSTP); sigdelset(&sigset, SIGCONT); sigprocmask(SIG_SETMASK, &sigset, NULL); /* SIGINT, SIGTERM, SIGSEGV */ sigact.sa_handler = sighandler_th; sigemptyset(&sigact.sa_mask); sigaddset(&sigact.sa_mask, SIGINT); sigaddset(&sigact.sa_mask, SIGTERM); sigaddset(&sigact.sa_mask, SIGHUP); sigaddset(&sigact.sa_mask, SIGPIPE); sigaddset(&sigact.sa_mask, SIGUSR2); sigaction(SIGINT, &sigact, NULL); sigaction(SIGTERM, &sigact, NULL); sigaction(SIGHUP, &sigact, NULL); sigaction(SIGPIPE, &sigact, NULL); sigaction(SIGUSR2, &sigact, NULL); #endif idletimeout = optget(opts, "IdleTimeout")->numarg; for (i=0;i < nsockets;i++) if (fds_add(&acceptdata.fds, socketds[i], 1, 0) == -1) { logg("!fds_add failed\n"); cl_engine_free(engine); return 1; } #ifdef _WIN32 event_wake_accept = CreateEvent(NULL, TRUE, FALSE, NULL); event_wake_recv = CreateEvent(NULL, TRUE, FALSE, NULL); #else if (pipe(acceptdata.syncpipe_wake_recv) == -1 || (pipe(acceptdata.syncpipe_wake_accept) == -1)) { logg("!pipe failed\n"); exit(-1); } syncpipe_wake_recv_w = acceptdata.syncpipe_wake_recv[1]; if (fds_add(fds, acceptdata.syncpipe_wake_recv[0], 1, 0) == -1 || fds_add(&acceptdata.fds, acceptdata.syncpipe_wake_accept[0], 1, 0)) { logg("!failed to add pipe fd\n"); exit(-1); } #endif if ((thr_pool = thrmgr_new(max_threads, idletimeout, max_queue, scanner_thread)) == NULL) { logg("!thrmgr_new failed\n"); exit(-1); } if (pthread_create(&accept_th, NULL, acceptloop_th, &acceptdata)) { logg("!pthread_create failed\n"); exit(-1); } time(&start_time); for(;;) { int new_sd; /* Block waiting for connection on any of the sockets */ pthread_mutex_lock(fds->buf_mutex); fds_cleanup(fds); /* signal that we can accept more connections */ if (fds->nfds <= (unsigned)max_queue) pthread_cond_signal(&acceptdata.cond_nfds); new_sd = fds_poll_recv(fds, selfchk ? (int)selfchk : -1, 1, event_wake_recv); #ifdef _WIN32 ResetEvent(event_wake_recv); #else if (!fds->nfds) { /* at least the dummy/sync pipe should have remained */ logg("!All recv() descriptors gone: fatal\n"); pthread_mutex_lock(&exit_mutex); progexit = 1; pthread_mutex_unlock(&exit_mutex); pthread_mutex_unlock(fds->buf_mutex); break; } #endif if (new_sd == -1 && errno != EINTR) { logg("!Failed to poll sockets, fatal\n"); pthread_mutex_lock(&exit_mutex); progexit = 1; pthread_mutex_unlock(&exit_mutex); } if(fds->nfds) i = (rr_last + 1) % fds->nfds; for (j = 0; j < fds->nfds && new_sd >= 0; j++, i = (i+1) % fds->nfds) { size_t pos = 0; int error = 0; struct fd_buf *buf = &fds->buf[i]; if (!buf->got_newdata) continue; #ifndef _WIN32 if (buf->fd == acceptdata.syncpipe_wake_recv[0]) { /* dummy sync pipe, just to wake us */ if (read(buf->fd, buff, sizeof(buff)) < 0) { logg("^Syncpipe read failed\n"); } continue; } #endif if (buf->got_newdata == -1) { if (buf->mode == MODE_WAITREPLY) { logg("$mode WAIT_REPLY -> closed\n"); buf->fd = -1; thrmgr_group_terminate(buf->group); thrmgr_group_finished(buf->group, EXIT_ERROR); continue; } else { logg("$client read error or EOF on read\n"); error = 1; } } if (buf->fd != -1 && buf->got_newdata == -2) { logg("$Client read timed out\n"); mdprintf(buf->fd, "COMMAND READ TIMED OUT\n"); error = 1; } rr_last = i; if (buf->mode == MODE_WAITANCILL) { buf->mode = MODE_COMMAND; logg("$mode -> MODE_COMMAND\n"); } while (!error && buf->fd != -1 && buf->buffer && pos < buf->off && buf->mode != MODE_WAITANCILL) { client_conn_t conn; const char *cmd = NULL; int rc; /* New data available to read on socket. */ memset(&conn, 0, sizeof(conn)); conn.scanfd = buf->recvfd; buf->recvfd = -1; conn.sd = buf->fd; conn.options = options; conn.opts = opts; conn.thrpool = thr_pool; conn.engine = engine; conn.group = buf->group; conn.id = buf->id; conn.quota = buf->quota; conn.filename = buf->dumpname; conn.mode = buf->mode; conn.term = buf->term; /* Parse & dispatch command */ cmd = parse_dispatch_cmd(&conn, buf, &pos, &error, opts, readtimeout); if (conn.mode == MODE_COMMAND && !cmd) break; if (!error) { if (buf->mode == MODE_WAITREPLY && buf->off) { /* Client is not supposed to send anything more */ logg("^Client sent garbage after last command: %lu bytes\n", (unsigned long)buf->off); buf->buffer[buf->off] = '\0'; logg("$Garbage: %s\n", buf->buffer); error = 1; } else if (buf->mode == MODE_STREAM) { rc = handle_stream(&conn, buf, opts, &error, &pos, readtimeout); if (rc == -1) break; else continue; } } if (error && error != CL_ETIMEOUT) { conn_reply_error(&conn, "Error processing command."); } } if (error) { if (buf->dumpfd != -1) { close(buf->dumpfd); if (buf->dumpname) { cli_unlink(buf->dumpname); free(buf->dumpname); } buf->dumpfd = -1; } thrmgr_group_terminate(buf->group); if (thrmgr_group_finished(buf->group, EXIT_ERROR)) { if (buf->fd < 0) { logg("$Skipping shutdown of bad socket after error (FD %d)\n", buf->fd); } else { logg("$Shutting down socket after error (FD %d)\n", buf->fd); shutdown(buf->fd, 2); closesocket(buf->fd); } } else logg("$Socket not shut down due to active tasks\n"); buf->fd = -1; } } pthread_mutex_unlock(fds->buf_mutex); /* handle progexit */ pthread_mutex_lock(&exit_mutex); if (progexit) { pthread_mutex_unlock(&exit_mutex); pthread_mutex_lock(fds->buf_mutex); for (i=0;i < fds->nfds; i++) { if (fds->buf[i].fd == -1) continue; thrmgr_group_terminate(fds->buf[i].group); if (thrmgr_group_finished(fds->buf[i].group, EXIT_ERROR)) { logg("$Shutdown closed fd %d\n", fds->buf[i].fd); shutdown(fds->buf[i].fd, 2); closesocket(fds->buf[i].fd); fds->buf[i].fd = -1; } } pthread_mutex_unlock(fds->buf_mutex); break; } pthread_mutex_unlock(&exit_mutex); /* SIGHUP */ if (sighup) { logg("SIGHUP caught: re-opening log file.\n"); logg_close(); sighup = 0; if(!logg_file && (opt = optget(opts, "LogFile"))->enabled) logg_file = opt->strarg; } /* SelfCheck */ if(selfchk) { time(¤t_time); if((current_time - start_time) >= (time_t)selfchk) { if(reload_db(engine, dboptions, opts, TRUE, &ret)) { pthread_mutex_lock(&reload_mutex); reload = 1; pthread_mutex_unlock(&reload_mutex); } time(&start_time); } } /* DB reload */ pthread_mutex_lock(&reload_mutex); if(reload) { pthread_mutex_unlock(&reload_mutex); engine = reload_db(engine, dboptions, opts, FALSE, &ret); if(ret) { logg("Terminating because of a fatal error.\n"); if(new_sd >= 0) closesocket(new_sd); break; } pthread_mutex_lock(&reload_mutex); reload = 0; time(&reloaded_time); pthread_mutex_unlock(&reload_mutex); #if defined(FANOTIFY) || defined(CLAMAUTH) if(optget(opts, "ScanOnAccess")->enabled && tharg) { tharg->engine = engine; } #endif time(&start_time); } else { pthread_mutex_unlock(&reload_mutex); } } pthread_mutex_lock(&exit_mutex); progexit = 1; pthread_mutex_unlock(&exit_mutex); #ifdef _WIN32 SetEvent(event_wake_accept); #else if (write(acceptdata.syncpipe_wake_accept[1], "", 1) < 0) { logg("^Write to syncpipe failed\n"); } #endif /* Destroy the thread manager. * This waits for all current tasks to end */ logg("*Waiting for all threads to finish\n"); thrmgr_destroy(thr_pool); #if defined(FANOTIFY) || defined(CLAMAUTH) if(optget(opts, "ScanOnAccess")->enabled && tharg) { logg("Stopping on-access scan\n"); pthread_mutex_lock(&logg_mutex); pthread_kill(fan_pid, SIGUSR1); pthread_mutex_unlock(&logg_mutex); pthread_join(fan_pid, NULL); free(tharg); } #endif if(engine) { thrmgr_setactiveengine(NULL); cl_engine_free(engine); } pthread_join(accept_th, NULL); fds_free(fds); pthread_mutex_destroy(fds->buf_mutex); pthread_cond_destroy(&acceptdata.cond_nfds); #ifdef _WIN32 CloseHandle(event_wake_accept); CloseHandle(event_wake_recv); #else close(acceptdata.syncpipe_wake_accept[1]); close(acceptdata.syncpipe_wake_recv[1]); #endif if(dbstat.entries) cl_statfree(&dbstat); logg("*Shutting down the main socket%s.\n", (nsockets > 1) ? "s" : ""); for (i = 0; i < nsockets; i++) shutdown(socketds[i], 2); if((opt = optget(opts, "PidFile"))->enabled) { if(unlink(opt->strarg) == -1) logg("!Can't unlink the pid file %s\n", opt->strarg); else logg("Pid file removed.\n"); } time(¤t_time); logg("--- Stopped at %s", cli_ctime(¤t_time, timestr, sizeof(timestr))); return ret; }
/* static const unsigned char* parse_dispatch_cmd(client_conn_t *conn, struct fd_buf *buf, size_t *ppos, int *error, const struct optstruct *opts, int readtimeout) */ static int handle_stream(client_conn_t *conn, struct fd_buf *buf, const struct optstruct *opts, int *error, size_t *ppos, int readtimeout) { int rc; size_t pos = *ppos; size_t cmdlen; logg("$mode == MODE_STREAM\n"); /* we received some data, set readtimeout */ time(&buf->timeout_at); buf->timeout_at += readtimeout; while (pos <= buf->off) { if (!buf->chunksize) { /* read chunksize */ if (buf->off-pos >= 4) { uint32_t cs; memmove(&cs, buf->buffer + pos, 4); pos += 4; buf->chunksize = ntohl(cs); logg("$Got chunksize: %u\n", buf->chunksize); if (!buf->chunksize) { /* chunksize 0 marks end of stream */ conn->scanfd = buf->dumpfd; conn->term = buf->term; buf->dumpfd = -1; buf->mode = buf->group ? MODE_COMMAND : MODE_WAITREPLY; if (buf->mode == MODE_WAITREPLY) buf->fd = -1; logg("$Chunks complete\n"); buf->dumpname = NULL; if ((rc = execute_or_dispatch_command(conn, COMMAND_INSTREAMSCAN, NULL)) < 0) { logg("!Command dispatch failed\n"); if(rc == -1 && optget(opts, "ExitOnOOM")->enabled) { pthread_mutex_lock(&exit_mutex); progexit = 1; pthread_mutex_unlock(&exit_mutex); } *error = 1; } else { memmove (buf->buffer, &buf->buffer[pos], buf->off - pos); buf->off -= pos; *ppos = 0; buf->id++; return 0; } } if (buf->chunksize > buf->quota) { logg("^INSTREAM: Size limit reached, (requested: %lu, max: %lu)\n", (unsigned long)buf->chunksize, (unsigned long)buf->quota); conn_reply_error(conn, "INSTREAM size limit exceeded."); *error = 1; *ppos = pos; return -1; } else { buf->quota -= buf->chunksize; } logg("$Quota Remaining: %lu\n", buf->quota); } else { /* need more data, so return and wait for some */ memmove (buf->buffer, &buf->buffer[pos], buf->off - pos); buf->off -= pos; *ppos = 0; return -1; } } if (pos + buf->chunksize < buf->off) cmdlen = buf->chunksize; else cmdlen = buf->off - pos; buf->chunksize -= cmdlen; if (cli_writen(buf->dumpfd, buf->buffer + pos, cmdlen) < 0) { conn_reply_error(conn, "Error writing to temporary file"); logg("!INSTREAM: Can't write to temporary file.\n"); *error = 1; } logg("$Processed %lu bytes of chunkdata, pos %lu\n", cmdlen, pos); pos += cmdlen; if (pos == buf->off) { buf->off = 0; pos = 0; /* need more data, so return and wait for some */ *ppos = pos; return -1; } } *ppos = pos; return 0; }
static const char* parse_dispatch_cmd(client_conn_t *conn, struct fd_buf *buf, size_t *ppos, int *error, const struct optstruct *opts, int readtimeout) { const char *cmd = NULL; int rc; size_t cmdlen; char term; int oldstyle; size_t pos = *ppos; /* Parse & dispatch commands */ while ((conn->mode == MODE_COMMAND) && (cmd = get_cmd(buf, pos, &cmdlen, &term, &oldstyle)) != NULL) { const char *argument; enum commands cmdtype; if (conn->group && oldstyle) { logg("$Received oldstyle command inside IDSESSION: %s\n", cmd); conn_reply_error(conn, "Only nCMDS\\n and zCMDS\\0 are accepted inside IDSESSION."); *error = 1; break; } cmdtype = parse_command(cmd, &argument, oldstyle); logg("$got command %s (%u, %u), argument: %s\n", cmd, (unsigned)cmdlen, (unsigned)cmdtype, argument ? argument : ""); if (cmdtype == COMMAND_FILDES) { if (buf->buffer + buf->off <= cmd + strlen("FILDES\n")) { /* we need the extra byte from recvmsg */ conn->mode = MODE_WAITANCILL; buf->mode = MODE_WAITANCILL; /* put term back */ buf->buffer[pos + cmdlen] = term; cmdlen = 0; logg("$RECVTH: mode -> MODE_WAITANCILL\n"); break; } /* eat extra \0 for controlmsg */ cmdlen++; logg("$RECVTH: FILDES command complete\n"); } conn->term = term; buf->term = term; if ((rc = execute_or_dispatch_command(conn, cmdtype, argument)) < 0) { logg("!Command dispatch failed\n"); if(rc == -1 && optget(opts, "ExitOnOOM")->enabled) { pthread_mutex_lock(&exit_mutex); progexit = 1; pthread_mutex_unlock(&exit_mutex); } *error = 1; } if (thrmgr_group_need_terminate(conn->group)) { logg("$Receive thread: have to terminate group\n"); *error = CL_ETIMEOUT; break; } if (*error || !conn->group || rc) { if (rc && thrmgr_group_finished(conn->group, EXIT_OK)) { logg("$Receive thread: closing conn (FD %d), group finished\n", conn->sd); /* if there are no more active jobs */ shutdown(conn->sd, 2); closesocket(conn->sd); buf->fd = -1; conn->group = NULL; } else if (conn->mode != MODE_STREAM) { logg("$mode -> MODE_WAITREPLY\n"); /* no more commands are accepted */ conn->mode = MODE_WAITREPLY; /* Stop monitoring this FD, it will be closed either * by us, or by the scanner thread. * Never close a file descriptor that is being * monitored by poll()/select() from another thread, * because this can lead to subtle bugs such as: * Other thread closes file descriptor -> POLLHUP is * set, but the poller thread doesn't wake up yet. * Another client opens a connection and sends some * data. If the socket reuses the previous file descriptor, * then POLLIN is set on the file descriptor too. * When poll() wakes up it sees POLLIN | POLLHUP * and thinks that the client has sent some data, * and closed the connection, so clamd closes the * connection in turn resulting in a bug. * * If we wouldn't have poll()-ed the file descriptor * we closed in another thread, but rather made sure * that we don't put a FD that we're about to close * into poll()'s list of watched fds; then POLLHUP * would be set, but the file descriptor would stay * open, until we wake up from poll() and close it. * Thus a new connection won't be able to reuse the * same FD, and there is no bug. * */ buf->fd = -1; } } /* we received a command, set readtimeout */ time(&buf->timeout_at); buf->timeout_at += readtimeout; pos += cmdlen+1; if (conn->mode == MODE_STREAM) { /* TODO: this doesn't belong here */ buf->dumpname = conn->filename; buf->dumpfd = conn->scanfd; logg("$Receive thread: INSTREAM: %s fd %u\n", buf->dumpname, buf->dumpfd); } if (conn->mode != MODE_COMMAND) { logg("$Breaking command loop, mode is no longer MODE_COMMAND\n"); break; } conn->id++; } *ppos = pos; buf->mode = conn->mode; buf->id = conn->id; buf->group = conn->group; buf->quota = conn->quota; if (conn->scanfd != -1 && conn->scanfd != buf->dumpfd) { logg("$Unclaimed file descriptor received, closing: %d\n", conn->scanfd); close(conn->scanfd); /* protocol error */ conn_reply_error(conn, "PROTOCOL ERROR: ancillary data sent without FILDES."); *error = 1; return NULL; } if (!*error) { /* move partial command to beginning of buffer */ if (pos < buf->off) { memmove (buf->buffer, &buf->buffer[pos], buf->off - pos); buf->off -= pos; } else buf->off = 0; if (buf->off) logg("$Moved partial command: %lu\n", (unsigned long)buf->off); else logg("$Consumed entire command\n"); /* adjust pos to account for the buffer shuffle */ pos = 0; } *ppos = pos; return cmd; }
/* returns * -1 on fatal error (shutdown) * 0 on ok * >0 errors encountered */ int command(client_conn_t *conn, int *virus) { int desc = conn->sd; struct cl_engine *engine = conn->engine; unsigned int options = conn->options; const struct optstruct *opts = conn->opts; int type = -1; /* TODO: make this enum */ int maxdirrec; int ret = 0; int flags = CLI_FTW_STD; struct scan_cb_data scandata; struct cli_ftw_cbdata data; unsigned ok, error, total; jobgroup_t *group = NULL; if (thrmgr_group_need_terminate(conn->group)) { logg("$Client disconnected while command was active\n"); if (conn->scanfd != -1) close(conn->scanfd); return 1; } thrmgr_setactiveengine(engine); data.data = &scandata; memset(&scandata, 0, sizeof(scandata)); scandata.id = conn->id; scandata.group = conn->group; scandata.odesc = desc; scandata.conn = conn; scandata.options = options; scandata.engine = engine; scandata.opts = opts; scandata.thr_pool = conn->thrpool; scandata.toplevel_path = conn->filename; switch (conn->cmdtype) { case COMMAND_SCAN: thrmgr_setactivetask(NULL, "SCAN"); type = TYPE_SCAN; break; case COMMAND_CONTSCAN: thrmgr_setactivetask(NULL, "CONTSCAN"); type = TYPE_CONTSCAN; break; case COMMAND_MULTISCAN: flags &= ~CLI_FTW_NEED_STAT; thrmgr_setactivetask(NULL, "MULTISCAN"); type = TYPE_MULTISCAN; scandata.group = group = thrmgr_group_new(); if (!group) return CL_EMEM; break; case COMMAND_MULTISCANFILE: thrmgr_setactivetask(NULL, "MULTISCANFILE"); scandata.group = NULL; scandata.type = TYPE_SCAN; scandata.thr_pool = NULL; /* TODO: check ret value */ ret = scan_callback(NULL, conn->filename, conn->filename, visit_file, &data); /* callback freed it */ conn->filename = NULL; *virus = scandata.infected; if (ret == CL_BREAK) { thrmgr_group_terminate(conn->group); return CL_BREAK; } return scandata.errors > 0 ? scandata.errors : 0; case COMMAND_FILDES: thrmgr_setactivetask(NULL, "FILDES"); #ifdef HAVE_FD_PASSING if (conn->scanfd == -1) conn_reply_error(conn, "FILDES: didn't receive file descriptor."); else { ret = scanfd(conn->scanfd, conn, NULL, engine, options, opts, desc, 0); if (ret == CL_VIRUS) { *virus = 1; } else if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) ret = -1; } else if (ret == CL_ETIMEOUT) { thrmgr_group_terminate(conn->group); ret = 1; } else ret = 0; } logg("$Closed fd %d\n", conn->scanfd); close(conn->scanfd); return ret; #else conn_reply_error(conn, "FILDES support not compiled in."); close(conn->scanfd); return 0; #endif case COMMAND_STATS: thrmgr_setactivetask(NULL, "STATS"); if (conn->group) mdprintf(desc, "%u: ", conn->id); thrmgr_printstats(desc); return 0; case COMMAND_STREAM: thrmgr_setactivetask(NULL, "STREAM"); ret = scanstream(desc, NULL, engine, options, opts, conn->term); if (ret == CL_VIRUS) *virus = 1; if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) return -1; } return 0; case COMMAND_INSTREAMSCAN: thrmgr_setactivetask(NULL, "INSTREAM"); ret = scanfd(conn->scanfd, conn, NULL, engine, options, opts, desc, 1); if (ret == CL_VIRUS) { *virus = 1; } else if (ret == CL_EMEM) { if(optget(opts, "ExitOnOOM")->enabled) ret = -1; } else if (ret == CL_ETIMEOUT) { thrmgr_group_terminate(conn->group); ret = 1; } else ret = 0; if (ftruncate(conn->scanfd, 0) == -1) { /* not serious, we're going to close it and unlink it anyway */ logg("*ftruncate failed: %d\n", errno); } close(conn->scanfd); conn->scanfd = -1; cli_unlink(conn->filename); return ret; } scandata.type = type; maxdirrec = optget(opts, "MaxDirectoryRecursion")->numarg; if (optget(opts, "FollowDirectorySymlinks")->enabled) flags |= CLI_FTW_FOLLOW_DIR_SYMLINK; if (optget(opts, "FollowFileSymlinks")->enabled) flags |= CLI_FTW_FOLLOW_FILE_SYMLINK; ret = cli_ftw(conn->filename, flags, maxdirrec ? maxdirrec : INT_MAX, scan_callback, &data); if (ret == CL_EMEM) if(optget(opts, "ExitOnOOM")->enabled) return -1; if (scandata.group && conn->cmdtype == COMMAND_MULTISCAN) { thrmgr_group_waitforall(group, &ok, &error, &total); } else { error = scandata.errors; total = scandata.total; ok = total - error - scandata.infected; } if (ok + error == total && (error != total)) { if (conn_reply_single(conn, conn->filename, "OK") == -1) ret = CL_ETIMEOUT; } *virus = total - (ok + error); if (ret == CL_ETIMEOUT) thrmgr_group_terminate(conn->group); return error; }