/***************************************************************************** * * Nagios check_icmp plugin * * License: GPL * Copyright (c) 2005-2008 Nagios Plugins Development Team * Original Author : Andreas Ericsson * Jitter, MOS and Score support added by Alessandro Ren * IPv6 / ICMPv6 support added by Troy Lea aka Box293 * Credit for IPv6 / ICMPv6 code is given to Lars Michelsen as per the GitHib * commit ec656bf4b3747c0987815d2f3b4ef96bce5613b6. * * * Description: * * This file contains the check_icmp plugin * * Relevant RFC's: 792 (ICMP), 4443 (ICMPv6), 791 (IP), 2460 (IPv6) * * This program was modeled somewhat after the check_icmp program, * which was in turn a hack of fping (www.fping.org) but has been * completely rewritten since to generate higher precision rta values, * and support several different modes as well as setting ttl to control. * redundant routes. The only remainders of fping is currently a few * function names. * * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * * *****************************************************************************/ char *progname; const char *copyright = "2005-2018"; const char *email = "devel@nagios-plugins.org"; #ifdef __sun #define _XPG4_2 #endif /* nagios plugins basic includes */ #include "common.h" #include "netutils.h" #include "utils.h" #if HAVE_SYS_SOCKIO_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* sometimes undefined system macros (quite a few, actually) */ #ifndef MAXTTL #define MAXTTL 255 #endif #ifndef INADDR_NONE #define INADDR_NONE (in_addr_t)(-1) #endif #ifndef SOL_IP #define SOL_IP 0 #endif /* we bundle these in one #ifndef, since they're all from BSD */ /* Put individual #ifndef's around those that bother you */ #ifndef ICMP_UNREACH_NET_UNKNOWN #define ICMP_UNREACH_NET_UNKNOWN 6 #define ICMP_UNREACH_HOST_UNKNOWN 7 #define ICMP_UNREACH_ISOLATED 8 #define ICMP_UNREACH_NET_PROHIB 9 #define ICMP_UNREACH_HOST_PROHIB 10 #define ICMP_UNREACH_TOSNET 11 #define ICMP_UNREACH_TOSHOST 12 #endif /* tru64 has the ones above, but not these */ #ifndef ICMP_UNREACH_FILTER_PROHIB #define ICMP_UNREACH_FILTER_PROHIB 13 #define ICMP_UNREACH_HOST_PRECEDENCE 14 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 #endif #ifndef DBL_MAX #define DBL_MAX 9.9999999999e999 #endif typedef unsigned short range_t; /* type for get_range() -- unimplemented */ typedef struct rta_host { unsigned short id; /* id in **table, and icmp pkts */ char *name; /* arg used for adding this host */ char *msg; /* icmp error message, if any */ struct sockaddr_storage saddr_in; /* the address of this host */ struct sockaddr_storage error_addr; /* stores address of error replies */ unsigned long long time_waited; /* total time waited, in usecs */ unsigned int icmp_sent, icmp_recv, icmp_lost; /* counters */ unsigned char icmp_type, icmp_code; /* type and code from errors */ unsigned short flags; /* control/status flags */ double rta; /* measured RTA */ int rta_status; double rtmax; /* max rtt */ double rtmin; /* min rtt */ double jitter; /* measured jitter */ int jitter_status; double jitter_max; /* jitter rtt */ double jitter_min; /* jitter rtt */ double EffectiveLatency; double mos; /* Mean opinion score */ int mos_status; double score; /* score */ int score_status; u_int last_tdiff; u_int last_icmp_seq; /* Last ICMP_SEQ to check out of order pkts */ unsigned char pl; /* measured packet loss */ int pl_status; struct rta_host *next; /* linked list */ int order_status; } rta_host; #define FLAG_LOST_CAUSE 0x01 /* decidedly dead target. */ /* threshold structure. all values are maximum allowed, exclusive */ typedef struct threshold { unsigned char pl; /* max allowed packet loss in percent */ unsigned int rta; /* roundtrip time average, microseconds */ double jitter; /* jitter time average, microseconds */ double mos; /* MOS */ double score; /* Score */ } threshold; /* the data structure */ typedef struct icmp_ping_data { struct timeval stime; /* timestamp (saved in protocol struct as well) */ unsigned short ping_id; } icmp_ping_data; typedef union ip_hdr { struct ip ip; struct ip6_hdr ip6; } ip_hdr; typedef union icmp_packet { void *buf; struct icmp *icp; struct icmp6_hdr *icp6; u_short *cksum_in; } icmp_packet; /* the different modes of this program are as follows: * MODE_RTA: send all packets no matter what (mimic check_icmp and check_ping) * MODE_HOSTCHECK: Return immediately upon any sign of life * In addition, sends packets to ALL addresses assigned * to this host (as returned by gethostbyname() or * gethostbyaddr() and expects one host only to be checked at * a time. Therefore, any packet response what so ever will * count as a sign of life, even when received outside * crit.rta limit. Do not misspell any additional IP's. * MODE_ALL: Requires packets from ALL requested IP to return OK (default). * MODE_ICMP: implement something similar to check_icmp (MODE_RTA without * tcp and udp args does this) */ #define MODE_RTA 0 #define MODE_HOSTCHECK 1 #define MODE_ALL 2 #define MODE_ICMP 3 /* the different ping types we can do */ /* TODO: investigate ARP ping as well */ #define HAVE_ICMP 1 #define HAVE_UDP 2 #define HAVE_TCP 4 #define HAVE_ARP 8 #define MIN_PING_DATA_SIZE sizeof(struct icmp_ping_data) #define MAX_IP_PKT_SIZE 65536 /* (theoretical) max IP packet size */ #define IP_HDR_SIZE 20 #define MAX_PING_DATA (MAX_IP_PKT_SIZE - IP_HDR_SIZE - ICMP_MINLEN) #define DEFAULT_PING_DATA_SIZE (MIN_PING_DATA_SIZE + 44) /* various target states */ #define TSTATE_INACTIVE 0x01 /* don't ping this host anymore */ #define TSTATE_WAITING 0x02 /* unanswered packets on the wire */ #define TSTATE_ALIVE 0x04 /* target is alive (has answered something) */ #define TSTATE_UNREACH 0x08 /* prototypes */ void print_help(void); void print_usage(void); static u_int get_timevar(const char *); static u_int get_timevaldiff(struct timeval *, struct timeval *); static in_addr_t get_ip_address(const char *); static int wait_for_reply(int, u_int); static int recvfrom_wto(int, void *, unsigned int, struct sockaddr *, u_int *, struct timeval *); static int send_icmp_ping(int, struct rta_host *); static int get_threshold(char *str, threshold *th); static int get_threshold2(char *str, threshold *, threshold *, int type); static void run_checks(void); static void set_source_ip(char *); static int add_target(char *); static int add_target_ip(char *, struct sockaddr_storage *); static int handle_random_icmp(unsigned char *, struct sockaddr_storage *); static unsigned short icmp_checksum(unsigned short *, int); static void finish(int); static void crash(const char *, ...); /* external */ extern int optind, opterr, optopt; extern char *optarg; extern char **environ; /* global variables */ static struct rta_host **table, *cursor, *list; static threshold crit = {80, 500000}, warn = {40, 200000}; static int mode, protocols, sockets, debug = 0, timeout = 10; static unsigned short icmp_data_size = DEFAULT_PING_DATA_SIZE; static unsigned short icmp_pkt_size = DEFAULT_PING_DATA_SIZE + ICMP_MINLEN; static unsigned int icmp_sent = 0, icmp_recv = 0, icmp_lost = 0; #define icmp_pkts_en_route (icmp_sent - (icmp_recv + icmp_lost)) static unsigned short targets_down = 0, targets = 0, packets = 0; #define targets_alive (targets - targets_down) static unsigned int retry_interval, pkt_interval, target_interval; static int icmp_sock, tcp_sock, udp_sock, status = STATE_OK; static pid_t pid; static struct timezone tz; static struct timeval prog_start; static unsigned long long max_completion_time = 0; static unsigned char ttl = 0; /* outgoing ttl */ static unsigned int warn_down = 1, crit_down = 1; /* host down threshold values */ static int min_hosts_alive = -1; float pkt_backoff_factor = 1.5; float target_backoff_factor = 1.5; int rta_mode = 0; int pl_mode = 0; int jitter_mode = 0; int score_mode = 0; int mos_mode = 0; int order_mode = 0; /* code start */ static void crash(const char *fmt, ...) { va_list ap; printf("%s: ", progname); va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); if (errno) { printf(": %s", strerror(errno)); } puts(""); exit(3); } static const char *get_icmp_error_msg(unsigned char icmp_type, unsigned char icmp_code) { const char *msg = "unreachable"; if (debug > 1) { printf("get_icmp_error_msg(%u, %u)\n", icmp_type, icmp_code); } switch (icmp_type) { case ICMP_UNREACH: switch (icmp_code) { case ICMP_UNREACH_NET: msg = "Net unreachable"; break; case ICMP_UNREACH_HOST: msg = "Host unreachable"; break; case ICMP_UNREACH_PROTOCOL: msg = "Protocol unreachable (firewall?)"; break; case ICMP_UNREACH_PORT: msg = "Port unreachable (firewall?)"; break; case ICMP_UNREACH_NEEDFRAG: msg = "Fragmentation needed"; break; case ICMP_UNREACH_SRCFAIL: msg = "Source route failed"; break; case ICMP_UNREACH_ISOLATED: msg = "Source host isolated"; break; case ICMP_UNREACH_NET_UNKNOWN: msg = "Unknown network"; break; case ICMP_UNREACH_HOST_UNKNOWN: msg = "Unknown host"; break; case ICMP_UNREACH_NET_PROHIB: msg = "Network denied (firewall?)"; break; case ICMP_UNREACH_HOST_PROHIB: msg = "Host denied (firewall?)"; break; case ICMP_UNREACH_TOSNET: msg = "Bad TOS for network (firewall?)"; break; case ICMP_UNREACH_TOSHOST: msg = "Bad TOS for host (firewall?)"; break; case ICMP_UNREACH_FILTER_PROHIB: msg = "Prohibited by filter (firewall)"; break; case ICMP_UNREACH_HOST_PRECEDENCE: msg = "Host precedence violation"; break; case ICMP_UNREACH_PRECEDENCE_CUTOFF: msg = "Precedence cutoff"; break; default: msg = "Invalid code"; break; } break; case ICMP_TIMXCEED: /* really 'out of reach', or non-existant host behind a router serving */ /* two different subnets */ switch (icmp_code) { case ICMP_TIMXCEED_INTRANS: msg = "Time to live exceeded in transit"; break; case ICMP_TIMXCEED_REASS: msg = "Fragment reassembly time exceeded"; break; default: msg = "Invalid code"; break; } break; case ICMP_SOURCEQUENCH: msg = "Transmitting too fast"; break; case ICMP_REDIRECT: msg = "Redirect (change route)"; break; case ICMP_PARAMPROB: msg = "Bad IP header (required option absent)"; break; /* the following aren't error messages, so ignore */ case ICMP_TSTAMP: case ICMP_TSTAMPREPLY: case ICMP_IREQ: case ICMP_IREQREPLY: case ICMP_MASKREQ: case ICMP_MASKREPLY: default: msg = ""; break; } return msg; } static int handle_random_icmp(unsigned char *packet, struct sockaddr_storage *addr) { struct icmp p, sent_icmp; struct rta_host *host = NULL; memcpy(&p, packet, sizeof(p)); if (p.icmp_type == ICMP_ECHO && ntohs(p.icmp_id) == pid) { /* echo request from us to us (pinging localhost) */ return 0; } if (debug) { printf("handle_random_icmp(%p, %p)\n", (void *)&p, (void *)addr); } /* only handle a few types, since others can't possibly be replies to * us in a sane network (if it is anyway, it will be counted as lost * at summary time, but not as quickly as a proper response */ /* TIMXCEED can be an unreach from a router with multiple IP's which * serves two different subnets on the same interface and a dead host * on one net is pinged from the other. The router will respond to * itself and thus set TTL=0 so as to not loop forever. Even when * TIMXCEED actually sends a proper icmp response we will have passed * too many hops to have a hope of reaching it later, in which case it * indicates overconfidence in the network, poor routing or both. */ if (p.icmp_type != ICMP_UNREACH && p.icmp_type != ICMP_TIMXCEED && p.icmp_type != ICMP_SOURCEQUENCH && p.icmp_type != ICMP_PARAMPROB) { return 0; } /* might be for us. At least it holds the original package (according * to RFC 792). If it isn't, just ignore it */ memcpy(&sent_icmp, packet + 28, sizeof(sent_icmp)); if (sent_icmp.icmp_type != ICMP_ECHO || ntohs(sent_icmp.icmp_id) != pid || ntohs(sent_icmp.icmp_seq) >= targets * packets) { if (debug) { printf("Packet is no response to a packet we sent\n"); } return 0; } /* it is indeed a response for us */ host = table[ntohs(sent_icmp.icmp_seq) / packets]; if (debug) { char address[address_length(address_family)]; parse_address_string(address_family, addr, address, sizeof(address)); printf("Received \"%s\" from %s for ICMP ECHO sent to %s.\n", get_icmp_error_msg(p.icmp_type, p.icmp_code), address, host->name); } icmp_lost++; host->icmp_lost++; /* don't spend time on lost hosts any more */ if (host->flags & FLAG_LOST_CAUSE) { return 0; } /* source quench means we're sending too fast, so increase the */ /* interval and mark this packet lost */ if (p.icmp_type == ICMP_SOURCEQUENCH) { pkt_interval *= pkt_backoff_factor; target_interval *= target_backoff_factor; } else { targets_down++; host->flags |= FLAG_LOST_CAUSE; } host->icmp_type = p.icmp_type; host->icmp_code = p.icmp_code; host->error_addr = *addr; return 0; } int main(int argc, char **argv) { int i; char *ptr; char *bind_address = NULL; long int arg; int icmp_sockerrno, udp_sockerrno, tcp_sockerrno; int result; struct rta_host *host; #ifdef HAVE_SIGACTION struct sigaction sig_action; #endif #ifdef SO_TIMESTAMP int on = 1; #endif setlocale(LC_ALL, ""); bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); /* print a helpful error message if geteuid != 0 */ np_warn_if_not_root(); /* Set default address_family to AF_INET (IPv4) */ /* It will be changed to AF_INET6 later if required */ address_family = AF_INET; /* Set default ip_protocol to IPPROTO_ICMP (IPv4) */ /* It will be changed to IPPROTO_ICMPV6 later if required */ int ip_protocol = IPPROTO_ICMP; /* we only need to be setsuid when we get the sockets, so do * that before pointer magic (esp. on network data) */ icmp_sockerrno = udp_sockerrno = tcp_sockerrno = sockets = 0; /* get calling name the old-fashioned way for portability instead * of relying on the glibc-ism __progname */ ptr = strrchr(argv[0], '/'); if (ptr) { progname = &ptr[1]; } else { progname = argv[0]; } /* now set defaults. Use progname to set them initially (allows for * superfast check_host program when target host is up */ cursor = list = NULL; table = NULL; mode = MODE_RTA; /* Default critical thresholds */ crit.rta = 500000; crit.pl = 80; crit.jitter = 50; crit.mos = 3; crit.score = 70; /* Default warning thresholds */ warn.rta = 200000; warn.pl = 40; warn.jitter = 40; warn.mos = 3.5; warn.score = 80; protocols = HAVE_ICMP | HAVE_UDP | HAVE_TCP; pkt_interval = 80000; /* 80 msec packet interval by default */ packets = 5; if (!strcmp(progname, "check_icmp") || !strcmp(progname, "check_ping")) { mode = MODE_ICMP; protocols = HAVE_ICMP; } else if (!strcmp(progname, "check_host")) { mode = MODE_HOSTCHECK; pkt_interval = 1000000; packets = 5; crit.rta = warn.rta = 1000000; crit.pl = warn.pl = 100; } else if (!strcmp(progname, "check_rta_multi")) { mode = MODE_ALL; target_interval = 0; pkt_interval = 50000; packets = 5; } /* parse the arguments */ for (i = 1; i < argc; i++) { while ((arg = getopt(argc, argv, "vhVw:c:n:p:t:H:s:i:b:I:l:m:P:R:J:S:M:O:64")) != EOF) { long size; switch (arg) { case 'v': debug++; break; case 'b': size = strtol(optarg, NULL, 0); if (size >= (sizeof(struct icmp) + sizeof(struct icmp_ping_data)) && size < MAX_PING_DATA) { icmp_data_size = size; icmp_pkt_size = size + ICMP_MINLEN; } else { usage_va("ICMP data length must be between: %d and %d", sizeof(struct icmp) + sizeof(struct icmp_ping_data), MAX_PING_DATA - 1); } break; case 'i': pkt_interval = get_timevar(optarg); break; case 'I': target_interval = get_timevar(optarg); break; case 'w': get_threshold(optarg, &warn); break; case 'c': get_threshold(optarg, &crit); break; case 'n': case 'p': packets = strtoul(optarg, NULL, 0); break; case 't': timeout = strtoul(optarg, NULL, 0); if (!timeout) { timeout = 10; } break; case '4': address_family = AF_INET; ip_protocol = IPPROTO_ICMP; break; case '6': #ifdef USE_IPV6 address_family = AF_INET6; ip_protocol = IPPROTO_ICMPV6; #else usage(_("IPv6 support not available\n")); #endif break; case 'H': add_target(optarg); break; case 'l': ttl = (unsigned char)strtoul(optarg, NULL, 0); break; case 'm': min_hosts_alive = (int)strtoul(optarg, NULL, 0); break; case 'd': /* implement later, for cluster checks */ warn_down = (unsigned char)strtoul(optarg, &ptr, 0); if (ptr) { crit_down = (unsigned char)strtoul(ptr + 1, NULL, 0); } break; case 's': /* specify source IP address */ bind_address = optarg; break; case 'V': /* version */ print_revision(progname, NP_VERSION); exit(STATE_OK); case 'h': /* help */ print_help(); exit(STATE_OK); case 'R': /* RTA mode */ get_threshold2(optarg, &warn, &crit, 1); rta_mode = 1; break; case 'P': /* packet loss mode */ get_threshold2(optarg, &warn, &crit, 2); pl_mode = 1; break; case 'J': /* packet loss mode */ get_threshold2(optarg, &warn, &crit, 3); jitter_mode = 1; break; case 'M': /* MOS mode */ get_threshold2(optarg, &warn, &crit, 4); mos_mode = 1; break; case 'S': /* score mode */ get_threshold2(optarg, &warn, &crit, 5); score_mode = 1; break; case 'O': /* out of order mode */ order_mode = 1; break; } } } if ((icmp_sock = socket(address_family, SOCK_RAW, ip_protocol)) != -1) { sockets |= HAVE_ICMP; } else { icmp_sockerrno = errno; } if (bind_address != NULL) { set_source_ip(bind_address); } /* now drop privileges (no effect if not setsuid or geteuid() == 0) */ setuid(getuid()); #ifdef SO_TIMESTAMP if (setsockopt(icmp_sock, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on))) { if (debug) { printf("Warning: no SO_TIMESTAMP support\n"); } } #endif /* SO_TIMESTAMP */ /* POSIXLY_CORRECT might break things, so unset it (the portable way) */ environ = NULL; /* use the pid to mark packets as ours */ /* Some systems have 32-bit pid_t so mask off only 16 bits */ pid = getpid() & 0xffff; /* printf("pid = %u\n", pid); */ /* Parse extra opts if any */ argv = np_extra_opts(&argc, argv, progname); /* support "--help" and "--version" */ if (argc == 2) { if (!strcmp(argv[1], "--help")) { strcpy(argv[1], "-h"); } if (!strcmp(argv[1], "--version")) { strcpy(argv[1], "-V"); } } if (debug) { printf("address_family: %i (IPv4 = 2; IPv6 = 10)\n", address_family); } argv = &argv[optind]; while (*argv) { add_target(*argv); argv++; } if (!targets) { errno = 0; crash("No hosts to check"); exit(3); } if (!sockets) { if (icmp_sock == -1) { errno = icmp_sockerrno; crash("Failed to obtain ICMP socket"); return -1; } /* if(udp_sock == -1) { */ /* errno = icmp_sockerrno; */ /* crash("Failed to obtain UDP socket"); */ /* return -1; */ /* } */ /* if(tcp_sock == -1) { */ /* errno = icmp_sockerrno; */ /* crash("Failed to obtain TCP socket"); */ /* return -1; */ /* } */ } if (!ttl) { ttl = 64; } if (icmp_sock) { result = setsockopt(icmp_sock, SOL_IP, IP_TTL, &ttl, sizeof(ttl)); if (debug) { if (result == -1) { printf("setsockopt failed\n"); } else { printf("ttl set to %u\n", ttl); } } } /* Users should be able to give whatever thresholds they want */ /* (nothing will break if they do), but some plugin maintainer */ /* will probably add some printf() thing here later, so it might be */ /* best to at least show them where to do it */ if (warn.pl > crit.pl) { warn.pl = crit.pl; } if (warn.rta > crit.rta) { warn.rta = crit.rta; } if (warn_down > crit_down) { crit_down = warn_down; } if (warn.jitter > crit.jitter) { crit.jitter = warn.jitter; } if (warn.mos < crit.mos) { warn.mos = crit.mos; } if (warn.score < crit.score) { warn.score = crit.score; } #ifdef HAVE_SIGACTION sig_action.sa_sigaction = NULL; sig_action.sa_handler = finish; sigfillset(&sig_action.sa_mask); sig_action.sa_flags = SA_NODEFER | SA_RESTART; sigaction(SIGINT, &sig_action, NULL); sigaction(SIGHUP, &sig_action, NULL); sigaction(SIGTERM, &sig_action, NULL); sigaction(SIGALRM, &sig_action, NULL); #else /* HAVE_SIGACTION */ signal(SIGINT, finish); signal(SIGHUP, finish); signal(SIGTERM, finish); signal(SIGALRM, finish); #endif /* HAVE_SIGACTION */ if (debug) { printf("Setting alarm timeout to %u seconds\n", timeout); } alarm(timeout); /* make sure we don't wait any longer than necessary */ gettimeofday(&prog_start, &tz); max_completion_time = ((targets * packets * pkt_interval) + (targets * target_interval)) + (targets * packets * crit.rta) + crit.rta; if (debug) { printf("packets: %u, targets: %u\n" "target_interval: %0.3f, pkt_interval %0.3f\n" "crit.rta: %0.3f\n" "max_completion_time: %0.3f\n", packets, targets, (float)target_interval / 1000, (float)pkt_interval / 1000, (float)crit.rta / 1000, (float)max_completion_time / 1000); } if (debug) { if (max_completion_time > (u_int)timeout * 1000000) { printf("max_completion_time: %llu timeout: %u\n", max_completion_time, timeout); printf("Timout must be at least %llu\n", max_completion_time / 1000000 + 1); } } if (debug) { printf("crit = {%u, %u%%}, warn = {%u, %u%%}\n", crit.rta, crit.pl, warn.rta, warn.pl); printf("pkt_interval: %u target_interval: %u retry_interval: %u\n", pkt_interval, target_interval, retry_interval); printf("icmp_pkt_size: %u timeout: %u\n", icmp_pkt_size, timeout); } if (packets > 20) { errno = 0; crash("packets is > 20 (%d)", packets); } if (min_hosts_alive < -1) { errno = 0; crash("minimum alive hosts is negative (%i)", min_hosts_alive); } host = list; table = (struct rta_host **)malloc(sizeof(struct rta_host **) * targets); i = 0; while (host) { host->id = i * packets; table[i] = host; host = host->next; i++; } run_checks(); errno = 0; finish(0); return (0); } static void run_checks() { u_int i, t, result; u_int final_wait, time_passed; /* this loop might actually violate the pkt_interval or target_interval * settings, but only if there aren't any packets on the wire which * indicates that the target can handle an increased packet rate */ for (i = 0; i < packets; i++) { for (t = 0; t < targets; t++) { /* don't send useless packets */ if (!targets_alive) { finish(0); } if (table[t]->flags & FLAG_LOST_CAUSE) { if (debug) { printf("%s is a lost cause. not sending any more\n", table[t]->name); } continue; } /* we're still in the game, so send next packet */ (void)send_icmp_ping(icmp_sock, table[t]); result = wait_for_reply(icmp_sock, target_interval); } result = wait_for_reply(icmp_sock, pkt_interval * targets); } if (icmp_pkts_en_route && targets_alive) { time_passed = get_timevaldiff(NULL, NULL); final_wait = max_completion_time - time_passed; if (debug) { printf("time_passed: %u final_wait: %u max_completion_time: %llu\n", time_passed, final_wait, max_completion_time); } if (time_passed > max_completion_time) { if (debug) { printf("Time passed. Finishing up\n"); } finish(0); } /* catch the packets that might come in within the timeframe, but * haven't yet */ if (debug) { printf("Waiting for %u micro-seconds (%0.3f msecs)\n", final_wait, (float)final_wait / 1000); } result = wait_for_reply(icmp_sock, final_wait); } } /* Response Structure: */ /* IPv4: */ /* ip header (total length) : 20 bytes */ /* IPv6: */ /* ip header (payload length) : 40 bytes */ /* Both: */ /* icmp header : 28 bytes */ /* icmp echo reply : the rest */ static int wait_for_reply(int sock, u_int t) { int n, hlen; static unsigned char buf[4096]; struct sockaddr_storage resp_addr; union ip_hdr *ip; union icmp_packet packet; struct rta_host *host; struct icmp_ping_data data; struct timeval wait_start, now; u_int tdiff, i, per_pkt_wait; double jitter_tmp; if (!(packet.buf = malloc(icmp_pkt_size))) { crash("send_icmp_ping(): failed to malloc %d bytes for send buffer", icmp_pkt_size); return -1; /* might be reached if we're in debug mode */ } memset(packet.buf, 0, icmp_pkt_size); /* if we can't listen or don't have anything to listen to, just return */ if (!t || !icmp_pkts_en_route) { free(packet.buf); return 0; } gettimeofday(&wait_start, &tz); i = t; per_pkt_wait = t / icmp_pkts_en_route; while (icmp_pkts_en_route && get_timevaldiff(&wait_start, NULL) < i) { t = per_pkt_wait; /* wrap up if all targets are declared dead */ if (!targets_alive || get_timevaldiff(&prog_start, NULL) >= max_completion_time || (mode == MODE_HOSTCHECK && targets_down)) { finish(0); } /* reap responses until we hit a timeout */ n = recvfrom_wto(sock, buf, sizeof(buf), (struct sockaddr *)&resp_addr, &t, &now); if (!n) { if (debug > 1) { printf("recvfrom_wto() timed out during a %u usecs wait\n", per_pkt_wait); } continue; /* timeout for this one, so keep trying */ } if (n < 0) { if (debug) { printf("recvfrom_wto() returned errors\n"); } return n; } if (debug > 1) { ip = (union ip_hdr *)buf; char address[address_length(address_family)]; parse_address_string(address_family, &resp_addr, address, sizeof(address)); if (address_family == AF_INET) { printf("received %u bytes from %s\n", ntohs(ip->ip.ip_len), address); } else if (address_family == AF_INET6) { printf("received %u bytes from %s\n", ntohs(ip->ip6.ip6_plen), address); } } /* IPv6 doesn't have a header length, it's a payload length */ if (address_family == AF_INET) { hlen = ip->ip.ip_hl << 2; } else if (address_family == AF_INET6) { hlen = 0; } if (n < (hlen + ICMP_MINLEN)) { char address[address_length(address_family)]; parse_address_string(address_family, &resp_addr, address, sizeof(address)); crash("received packet too short for ICMP (%d bytes, expected %d) from " "%s\n", n, hlen + icmp_pkt_size, address); } /* check the response */ memcpy(packet.buf, buf + hlen, icmp_pkt_size); if ((address_family == AF_INET && (ntohs(packet.icp->icmp_id) != pid || packet.icp->icmp_type != ICMP_ECHOREPLY || ntohs(packet.icp->icmp_seq) >= targets * packets)) || (address_family == AF_INET6 && (ntohs(packet.icp6->icmp6_id) != pid || packet.icp6->icmp6_type != ICMP6_ECHO_REPLY || ntohs(packet.icp6->icmp6_seq) >= targets * packets))) { if (debug > 2) { printf("not a proper ICMP_ECHOREPLY\n"); } handle_random_icmp(buf + hlen, &resp_addr); continue; } /* this is indeed a valid response */ if (address_family == AF_INET) { memcpy(&data, packet.icp->icmp_data, sizeof(data)); if (debug > 2) { printf("ICMP echo-reply of len %lu, id %u, seq %u, cksum 0x%X\n", (unsigned long)sizeof(data), ntohs(packet.icp->icmp_id), ntohs(packet.icp->icmp_seq), packet.icp->icmp_cksum); } host = table[ntohs(packet.icp->icmp_seq) / packets]; } else if (address_family == AF_INET6) { memcpy(&data, &packet.icp6->icmp6_dataun.icmp6_un_data8[4], sizeof(data)); if (debug > 2) { printf("ICMP echo-reply of len %lu, id %u, seq %u, cksum 0x%X\n", (unsigned long)sizeof(data), ntohs(packet.icp6->icmp6_id), ntohs(packet.icp6->icmp6_seq), packet.icp6->icmp6_cksum); } host = table[ntohs(packet.icp6->icmp6_seq) / packets]; } tdiff = get_timevaldiff(&data.stime, &now); if (host->last_tdiff > 0) { /* Calculate jitter */ if (host->last_tdiff > tdiff) { jitter_tmp = host->last_tdiff - tdiff; } else { jitter_tmp = tdiff - host->last_tdiff; } if (host->jitter == 0) { host->jitter = jitter_tmp; host->jitter_max = jitter_tmp; host->jitter_min = jitter_tmp; } else { host->jitter += jitter_tmp; if (jitter_tmp < host->jitter_min) { host->jitter_min = jitter_tmp; } if (jitter_tmp > host->jitter_max) { host->jitter_max = jitter_tmp; } } /* Check if packets in order */ if (host->last_icmp_seq >= packet.icp->icmp_seq) { host->order_status = STATE_CRITICAL; } } host->last_tdiff = tdiff; host->last_icmp_seq = packet.icp->icmp_seq; host->time_waited += tdiff; host->icmp_recv++; icmp_recv++; if (tdiff > (int)host->rtmax) { host->rtmax = tdiff; } if (tdiff < (int)host->rtmin) { host->rtmin = tdiff; } if (debug) { char address[address_length(address_family)]; parse_address_string(address_family, &resp_addr, address, sizeof(address)); printf("%0.3f ms rtt from %s, outgoing ttl: %u, incoming ttl: %u, max: " "%0.3f, min: %0.3f\n", (float)tdiff / 1000, address, ttl, ip->ip.ip_ttl, (float)host->rtmax / 1000, (float)host->rtmin / 1000); } /* if we're in hostcheck mode, exit with limited printouts */ if (mode == MODE_HOSTCHECK) { printf("OK - %s responds to ICMP. Packet %u, rta %0.3fms|" "pkt=%u;;0;%u rta=%0.3f;%0.3f;%0.3f;;\n", host->name, icmp_recv, (float)tdiff / 1000, icmp_recv, packets, (float)tdiff / 1000, (float)warn.rta / 1000, (float)crit.rta / 1000); exit(STATE_OK); } } return 0; } /* the ping functions */ static int send_icmp_ping(int sock, struct rta_host *host) { long int len; struct icmp_ping_data data; struct msghdr hdr; struct iovec iov; struct timeval tv; void *buf = NULL; if (sock == -1) { errno = 0; crash("Attempt to send on bogus socket"); return -1; } if (!buf) { if (!(buf = malloc(icmp_pkt_size))) { crash("send_icmp_ping(): failed to malloc %d bytes for send buffer", icmp_pkt_size); return -1; /* might be reached if we're in debug mode */ } } memset(buf, 0, icmp_pkt_size); if ((gettimeofday(&tv, &tz)) == -1) { free(buf); return -1; } data.ping_id = 10; /* host->icmp.icmp_sent; */ memcpy(&data.stime, &tv, sizeof(tv)); if (address_family == AF_INET) { struct icmp *icp = (struct icmp *)buf; memcpy(&icp->icmp_data, &data, sizeof(data)); icp->icmp_type = ICMP_ECHO; icp->icmp_code = 0; icp->icmp_cksum = 0; icp->icmp_id = htons(pid); icp->icmp_seq = htons(host->id++); icp->icmp_cksum = icmp_checksum((unsigned short *)buf, icmp_pkt_size); if (debug > 2) { printf("Sending ICMPv4 echo-request of len %lu, id %u, seq %u, cksum " "0x%X to host %s\n", (unsigned long)sizeof(data), ntohs(icp->icmp_id), ntohs(icp->icmp_seq), icp->icmp_cksum, host->name); } } else if (address_family == AF_INET6) { struct icmp6_hdr *icp6 = (struct icmp6_hdr *)buf; memcpy(&icp6->icmp6_dataun.icmp6_un_data8[4], &data, sizeof(data)); icp6->icmp6_type = ICMP6_ECHO_REQUEST; icp6->icmp6_code = 0; icp6->icmp6_cksum = 0; icp6->icmp6_id = htons(pid); icp6->icmp6_seq = htons(host->id++); /* checksum is calculated automatically */ if (debug > 2) { printf("Sending ICMPv6 echo-request of len %lu, id %u, seq %u, cksum " "0x%X to host %s\n", (unsigned long)sizeof(data), ntohs(icp6->icmp6_id), ntohs(icp6->icmp6_seq), icp6->icmp6_cksum, host->name); } } memset(&iov, 0, sizeof(iov)); iov.iov_base = buf; iov.iov_len = icmp_pkt_size; memset(&hdr, 0, sizeof(hdr)); hdr.msg_name = (struct sockaddr *)&host->saddr_in; hdr.msg_namelen = sizeof(struct sockaddr_storage); hdr.msg_iov = &iov; hdr.msg_iovlen = 1; errno = 0; /* MSG_CONFIRM is a linux thing and only available on linux kernels >= 2.3.15, * see send(2) */ #ifdef MSG_CONFIRM len = sendmsg(sock, &hdr, MSG_CONFIRM); #else len = sendmsg(sock, &hdr, 0); #endif free(buf); if (len < 0 || (unsigned int)len != icmp_pkt_size) { if (debug) { char address[address_length(address_family)]; parse_address_string(address_family, (struct sockaddr_storage *)&host->saddr_in, address, sizeof(address)); printf("Failed to send ping to %s = %s\n", address, strerror(errno)); } errno = 0; return -1; } icmp_sent++; host->icmp_sent++; return 0; } static int recvfrom_wto(int sock, void *buf, unsigned int len, struct sockaddr *saddr, u_int *timo, struct timeval *tv) { u_int slen; int n, ret; struct timeval to, then, now; fd_set rd, wr; char ans_data[4096]; struct msghdr hdr; struct iovec iov; #ifdef SO_TIMESTAMP struct cmsghdr *chdr; #endif if (!*timo) { if (debug) printf("*timo is not\n"); return 0; } to.tv_sec = *timo / 1000000; to.tv_usec = (*timo - (to.tv_sec * 1000000)); FD_ZERO(&rd); FD_ZERO(&wr); FD_SET(sock, &rd); errno = 0; gettimeofday(&then, &tz); n = select(sock + 1, &rd, &wr, NULL, &to); if (n < 0) { crash("select() in recvfrom_wto"); } gettimeofday(&now, &tz); *timo = get_timevaldiff(&then, &now); if (!n) { /* timeout */ return 0; } slen = sizeof(struct sockaddr_storage); memset(&iov, 0, sizeof(iov)); iov.iov_base = buf; iov.iov_len = len; memset(&hdr, 0, sizeof(hdr)); hdr.msg_name = saddr; hdr.msg_namelen = slen; hdr.msg_iov = &iov; hdr.msg_iovlen = 1; #ifdef HAVE_MSGHDR_MSG_CONTROL hdr.msg_control = ans_data; hdr.msg_controllen = sizeof(ans_data); #endif ret = recvmsg(sock, &hdr, 0); #ifdef SO_TIMESTAMP for (chdr = CMSG_FIRSTHDR(&hdr); chdr; chdr = CMSG_NXTHDR(&hdr, chdr)) { if (chdr->cmsg_level == SOL_SOCKET && chdr->cmsg_type == SO_TIMESTAMP && chdr->cmsg_len >= CMSG_LEN(sizeof(struct timeval))) { memcpy(tv, CMSG_DATA(chdr), sizeof(*tv)); break; } } #endif /* SO_TIMESTAMP */ if (!chdr) { gettimeofday(tv, &tz); } return (ret); } static void finish(int sig) { u_int i = 0; unsigned char pl; double rta; struct rta_host *host; const char *status_string[] = {"OK", "WARNING", "CRITICAL", "UNKNOWN", "DEPENDENT"}; int hosts_ok = 0; int hosts_warn = 0; int this_status; double R; alarm(0); if (debug > 1) { printf("finish(%d) called\n", sig); } if (icmp_sock != -1) { close(icmp_sock); } if (udp_sock != -1) { close(udp_sock); } if (tcp_sock != -1) { close(tcp_sock); } if (debug) { printf("icmp_sent: %u icmp_recv: %u icmp_lost: %u\n", icmp_sent, icmp_recv, icmp_lost); printf("targets: %u targets_alive: %u\n", targets, targets_alive); } /* iterate thrice to calculate values, give output, and print perfparse */ status = STATE_OK; host = list; while (host) { if (!host->icmp_recv) { /* rta 0 is ofcourse not entirely correct, but will still show up * conspicuosly as missing entries in perfparse and cacti */ pl = 100; rta = 0; status = STATE_CRITICAL; /* up the down counter if not already counted */ if (!(host->flags & FLAG_LOST_CAUSE) && targets_alive) { targets_down++; } } else { pl = ((host->icmp_sent - host->icmp_recv) * 100) / host->icmp_sent; rta = (double)host->time_waited / host->icmp_recv; } if (host->icmp_recv > 1) { host->jitter = (host->jitter / (host->icmp_recv - 1) / 1000); host->EffectiveLatency = (rta / 1000) + host->jitter * 2 + 10; if (host->EffectiveLatency < 160) { R = 93.2 - (host->EffectiveLatency / 40); } else { R = 93.2 - ((host->EffectiveLatency - 120) / 10); } R = R - (pl * 2.5); if (R < 0) { R = 0; } host->score = R; host->mos = 1 + ((0.035) * R) + ((.000007) * R * (R - 60) * (100 - R)); } else { host->jitter = 0; host->jitter_min = 0; host->jitter_max = 0; host->mos = 0; } host->pl = pl; host->rta = rta; /* if no new mode selected, use old schema */ if (!rta_mode && !pl_mode && !jitter_mode && !score_mode && !mos_mode && !order_mode) { rta_mode = 1; pl_mode = 1; } /* Check which mode is on and do the warn / Crit stuff */ if (rta_mode) { if (rta >= crit.rta) { this_status = STATE_CRITICAL; status = STATE_CRITICAL; host->rta_status = STATE_CRITICAL; } else if (status != STATE_CRITICAL && (rta >= warn.rta)) { this_status = (this_status <= STATE_WARNING ? STATE_WARNING : this_status); status = STATE_WARNING; host->rta_status = STATE_WARNING; } } if (pl_mode) { if (pl >= crit.pl) { this_status = STATE_CRITICAL; status = STATE_CRITICAL; host->pl_status = STATE_CRITICAL; } else if (status != STATE_CRITICAL && (pl >= warn.pl)) { this_status = (this_status <= STATE_WARNING ? STATE_WARNING : this_status); status = STATE_WARNING; host->pl_status = STATE_WARNING; } } if (jitter_mode) { if (host->jitter >= crit.jitter) { this_status = STATE_CRITICAL; status = STATE_CRITICAL; host->jitter_status = STATE_CRITICAL; } else if (status != STATE_CRITICAL && (host->jitter >= warn.jitter)) { this_status = (this_status <= STATE_WARNING ? STATE_WARNING : this_status); status = STATE_WARNING; host->jitter_status = STATE_WARNING; } } if (mos_mode) { if (host->mos <= crit.mos) { this_status = STATE_CRITICAL; status = STATE_CRITICAL; host->mos_status = STATE_CRITICAL; } else if (status != STATE_CRITICAL && (host->mos <= warn.mos)) { this_status = (this_status <= STATE_WARNING ? STATE_WARNING : this_status); status = STATE_WARNING; host->mos_status = STATE_WARNING; } } if (score_mode) { if (host->score <= crit.score) { this_status = STATE_CRITICAL; status = STATE_CRITICAL; host->score_status = STATE_CRITICAL; } else if (status != STATE_CRITICAL && (host->score <= warn.score)) { this_status = (this_status <= STATE_WARNING ? STATE_WARNING : this_status); status = STATE_WARNING; host->score_status = STATE_WARNING; } } if (this_status == STATE_WARNING) { hosts_warn++; } else if (this_status == STATE_OK) { hosts_ok++; } host = host->next; } /* this is inevitable */ if (!targets_alive) { status = STATE_CRITICAL; } if (min_hosts_alive > -1) { if (hosts_ok >= min_hosts_alive) { status = STATE_OK; } else if ((hosts_ok + hosts_warn) >= min_hosts_alive) { status = STATE_WARNING; } } printf("%s - ", status_string[status]); host = list; while (host) { if (debug) { puts(""); } if (i) { if (i < targets) { printf(" :: "); } else { printf("\n"); } } i++; if (!host->icmp_recv) { status = STATE_CRITICAL; host->rtmin = 0; host->jitter_min = 0; if (host->flags & FLAG_LOST_CAUSE) { char address[address_length(address_family)]; parse_address_string(address_family, &host->error_addr, address, sizeof(address)); printf("%s: %s @ %s. rta nan, lost %d%%", host->name, get_icmp_error_msg(host->icmp_type, host->icmp_code), address, 100); } else { /* not marked as lost cause, so we have no flags for it */ printf("%s: rta nan, lost 100%%", host->name); } } else { /* !icmp_recv */ printf("%s", host->name); /* rta text output */ if (rta_mode) { if (status == STATE_OK) { printf(" rta %0.3fms", host->rta / 1000); } else if (status == STATE_WARNING && host->rta_status == status) { printf(" rta %0.3fms >= %0.3fms", (float)host->rta / 1000, (float)warn.rta / 1000); } else if (status == STATE_CRITICAL && host->rta_status == status) { printf(" rta %0.3fms >= %0.3fms", (float)host->rta / 1000, (float)crit.rta / 1000); } } /* pl text output */ if (pl_mode) { if (status == STATE_OK) { printf(" lost %u%%", host->pl); } else if (status == STATE_WARNING && host->pl_status == status) { printf(" lost %u%% >= %u%%", host->pl, warn.pl); } else if (status == STATE_CRITICAL && host->pl_status == status) { printf(" lost %u%% >= %u%%", host->pl, crit.pl); } } /* jitter text output */ if (jitter_mode) { if (status == STATE_OK) { printf(" jitter %0.3fms", (float)host->jitter); } else if (status == STATE_WARNING && host->jitter_status == status) { printf(" jitter %0.3fms >= %0.3fms", (float)host->jitter, warn.jitter); } else if (status == STATE_CRITICAL && host->jitter_status == status) { printf(" jitter %0.3fms >= %0.3fms", (float)host->jitter, crit.jitter); } } /* mos text output */ if (mos_mode) { if (status == STATE_OK) { printf(" MOS %0.1f", (float)host->mos); } else if (status == STATE_WARNING && host->mos_status == status) { printf(" MOS %0.1f <= %0.1f", (float)host->mos, (float)warn.mos); } else if (status == STATE_CRITICAL && host->mos_status == status) { printf(" MOS %0.1f <= %0.1f", (float)host->mos, (float)crit.mos); } } /* score text output */ if (score_mode) { if (status == STATE_OK) { printf(" Score %u", (int)host->score); } else if (status == STATE_WARNING && host->score_status == status) { printf(" Score %u <= %u", (int)host->score, (int)warn.score); } else if (status == STATE_CRITICAL && host->score_status == status) { printf(" Score %u <= %u", (int)host->score, (int)crit.score); } } /* order statis text output */ if (order_mode) { if (status == STATE_OK) { printf(" Packets in order"); } else if (status == STATE_CRITICAL && host->order_status == status) { printf(" Packets out of order"); } } } host = host->next; } /* iterate once more for pretty perfparse output */ if (!(!rta_mode && !pl_mode && !jitter_mode && !score_mode && !mos_mode && order_mode)) { printf("|"); } i = 0; host = list; while (host) { if (debug) { puts(""); } if (rta_mode && host->pl < 100) { printf("%srta=%0.3fms;%0.3f;%0.3f;0; ", (targets > 1) ? host->name : "", (float)host->rta / 1000, (float)warn.rta / 1000, (float)crit.rta / 1000); } if (pl_mode) { printf("%spl=%u%%;%u;%u;0;100 ", (targets > 1) ? host->name : "", host->pl, warn.pl, crit.pl); } if (rta_mode && host->pl < 100) { printf("%srtmax=%0.3fms;;;; %srtmin=%0.3fms;;;; ", (targets > 1) ? host->name : "", (float)host->rtmax / 1000, (targets > 1) ? host->name : "", (float)host->rtmin / 1000); } if (jitter_mode && host->pl < 100) { printf("%sjitter_avg=%0.3fms;%0.3f;%0.3f;0; %sjitter_max=%0.3fms;;;; " "%sjitter_min=%0.3fms;;;; ", (targets > 1) ? host->name : "", (float)host->jitter, (float)warn.jitter, (float)crit.jitter, (targets > 1) ? host->name : "", (float)host->jitter_max / 1000, (targets > 1) ? host->name : "", (float)host->jitter_min / 1000); } if (mos_mode && host->pl < 100) { printf("%smos=%0.1f;%0.1f;%0.1f;0;5 ", (targets > 1) ? host->name : "", (float)host->mos, (float)warn.mos, (float)crit.mos); } if (score_mode && host->pl < 100) { printf("%sscore=%u;%u;%u;0;100 ", (targets > 1) ? host->name : "", (int)host->score, (int)warn.score, (int)crit.score); } host = host->next; } if (min_hosts_alive > -1) { if (hosts_ok >= min_hosts_alive) { status = STATE_OK; } else if ((hosts_ok + hosts_warn) >= min_hosts_alive) { status = STATE_WARNING; } } /* finish with an empty line */ puts(""); if (debug) { printf("targets: %u, targets_alive: %u, hosts_ok: %u, hosts_warn: %u, " "min_hosts_alive: %i\n", targets, targets_alive, hosts_ok, hosts_warn, min_hosts_alive); } exit(status); } static u_int get_timevaldiff(struct timeval *early, struct timeval *later) { u_int ret; struct timeval now; if (!later) { gettimeofday(&now, &tz); later = &now; } if (!early) early = &prog_start; /* if early > later we return 0 so as to indicate a timeout */ if (early->tv_sec > later->tv_sec || (early->tv_sec == later->tv_sec && early->tv_usec > later->tv_usec)) { return 0; } ret = (later->tv_sec - early->tv_sec) * 1000000; ret += later->tv_usec - early->tv_usec; return ret; } static int add_target_ip(char *arg, struct sockaddr_storage *in) { struct rta_host *host; struct sockaddr_in *sin, *host_sin; struct sockaddr_in6 *sin6, *host_sin6; if (address_family == AF_INET) { sin = (struct sockaddr_in *)in; } else { sin6 = (struct sockaddr_in6 *)in; } /* disregard some addresses */ if (((address_family == AF_INET && (sin->sin_addr.s_addr == INADDR_NONE || sin->sin_addr.s_addr == INADDR_ANY))) || (address_family == AF_INET6 && sin6->sin6_addr.s6_addr == in6addr_any.s6_addr)) { return -1; } /* no point in adding two identical IP's, so don't. ;) */ host = list; while (host) { host_sin = (struct sockaddr_in *)&host->saddr_in; host_sin6 = (struct sockaddr_in6 *)&host->saddr_in; if ((address_family == AF_INET && host_sin->sin_addr.s_addr == sin->sin_addr.s_addr) || (address_family == AF_INET6 && host_sin6->sin6_addr.s6_addr == sin6->sin6_addr.s6_addr)) { if (debug) { printf("Identical IP already exists. Not adding %s\n", arg); } return -1; } host = host->next; } /* add the fresh ip */ host = (struct rta_host *)malloc(sizeof(struct rta_host)); if (!host) { char address[address_length(address_family)]; parse_address_string(address_family, (struct sockaddr_storage *)&in, address, sizeof(address)); crash("add_target_ip(%s, %s): malloc(%d) failed", arg, address, sizeof(struct rta_host)); } memset(host, 0, sizeof(struct rta_host)); /* set the values. use calling name for output */ host->name = strdup(arg); /* fill out the sockaddr_storage struct */ if (address_family == AF_INET) { host_sin = (struct sockaddr_in *)&host->saddr_in; host_sin->sin_family = AF_INET; host_sin->sin_addr.s_addr = sin->sin_addr.s_addr; } else if (address_family == AF_INET6) { host_sin6 = (struct sockaddr_in6 *)&host->saddr_in; host_sin6->sin6_family = AF_INET6; memcpy(host_sin6->sin6_addr.s6_addr, sin6->sin6_addr.s6_addr, sizeof host_sin6->sin6_addr.s6_addr); } host->rtmin = DBL_MAX; host->rtmax = 0; host->jitter = 0; host->jitter_max = 0; host->jitter_min = DBL_MAX; host->last_tdiff = 0; host->order_status = STATE_OK; host->last_icmp_seq = 0; host->rta_status = 0; host->pl_status = 0; host->jitter_status = 0; host->mos_status = 0; host->score_status = 0; host->pl_status = 0; if (!list) { list = cursor = host; } else { cursor->next = host; } cursor = host; targets++; return 0; } /* wrapper for add_target_ip */ static int add_target(char *arg) { int error, result; struct sockaddr_storage ip; struct addrinfo hints, *res, *p; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; switch (address_family) { case AF_INET: sin = (struct sockaddr_in *)&ip; result = inet_pton(address_family, arg, &sin->sin_addr); break; case AF_INET6: sin6 = (struct sockaddr_in6 *)&ip; result = inet_pton(address_family, arg, &sin6->sin6_addr); break; default: crash("Address family not supported"); } /* don't resolve if we don't have to */ if (result == 1) { /* don't add all ip's if we were given a specific one */ return add_target_ip(arg, &ip); } else { errno = 0; memset(&hints, 0, sizeof(hints)); hints.ai_family = address_family == AF_INET ? PF_INET : PF_INET6; hints.ai_socktype = SOCK_RAW; if ((error = getaddrinfo(arg, NULL, &hints, &res)) != 0) { errno = 0; crash("Failed to resolve %s: %s", arg, gai_strerror(error)); return -1; } } /* possibly add all the IP's as targets */ for (p = res; p != NULL; p = p->ai_next) { memcpy(&ip, p->ai_addr, p->ai_addrlen); add_target_ip(arg, &ip); /* this is silly, but it works */ if (mode == MODE_HOSTCHECK || mode == MODE_ALL) { if (debug > 2) { printf("mode: %d\n", mode); } continue; } break; } freeaddrinfo(res); return 0; } static void set_source_ip(char *arg) { struct sockaddr_in src; memset(&src, 0, sizeof(src)); src.sin_family = address_family; if ((src.sin_addr.s_addr = inet_addr(arg)) == INADDR_NONE) { src.sin_addr.s_addr = get_ip_address(arg); } if (bind(icmp_sock, (struct sockaddr *)&src, sizeof(src)) == -1) { crash("Cannot bind to IP address %s", arg); } } /* TODO: Move this to netutils.c and also change check_dhcp to use that. */ static in_addr_t get_ip_address(const char *ifname) { #if defined(SIOCGIFADDR) struct ifreq ifr; struct sockaddr_in ip; strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1); ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0'; if (ioctl(icmp_sock, SIOCGIFADDR, &ifr) == -1) { crash("Cannot determine IP address of interface %s", ifname); } memcpy(&ip, &ifr.ifr_addr, sizeof(ip)); return ip.sin_addr.s_addr; #else errno = 0; crash("Cannot get interface IP address on this platform."); #endif } /* * u = micro * m = milli * s = seconds * return value is in microseconds */ static u_int get_timevar(const char *str) { char p, u, *ptr; size_t len; u_int i, d; /* integer and decimal, respectively */ u_int factor = 1000; /* default to milliseconds */ if (!str) { return 0; } len = strlen(str); if (!len) { return 0; } /* unit might be given as ms|m (millisec), * us|u (microsec) or just plain s, for seconds */ p = '\0'; u = str[len - 1]; if (len >= 2 && !isdigit((int)str[len - 2])) { p = str[len - 2]; } if (p && u == 's') { u = p; } else if (!p) { p = u; } if (debug > 2) { printf("evaluating %s, u: %c, p: %c\n", str, u, p); } if (u == 'u') { /* microseconds */ factor = 1; } else if (u == 'm') { /* milliseconds */ factor = 1000; } else if (u == 's') { /* seconds */ factor = 1000000; } if (debug > 2) { printf("factor is %u\n", factor); } i = strtoul(str, &ptr, 0); if (!ptr || *ptr != '.' || strlen(ptr) < 2 || factor == 1) { return i * factor; } /* time specified in usecs can't have decimal points, so ignore them */ if (factor == 1) { return i; } d = strtoul(ptr + 1, NULL, 0); /* d is decimal, so get rid of excess digits */ while (d >= factor) d /= 10; /* the last parenthesis avoids floating point exceptions. */ return ((i * factor) + (d * (factor / 10))); } /* not too good at checking errors, but it'll do (main() should barfe on -1) */ static int get_threshold(char *str, threshold *th) { char *p = NULL, i = 0; if (!str || !strlen(str) || !th) { return -1; } /* pointer magic slims code by 10 lines. i is bof-stop on stupid libc's */ p = &str[strlen(str) - 1]; while (p != &str[1]) { if (*p == '%') { *p = '\0'; } else if (*p == ',' && i) { *p = '\0'; /* reset it so get_timevar(str) works nicely later */ th->pl = (unsigned char)strtoul(p + 1, NULL, 0); break; } i = 1; p--; } th->rta = get_timevar(str); if (!th->rta) { return -1; } if (th->rta > MAXTTL * 1000000) { th->rta = MAXTTL * 1000000; } if (th->pl > 100) { th->pl = 100; } return 0; } /* not too good at checking errors, but it'll do (main() should barfe on -1) */ static int get_threshold2(char *str, threshold *warn, threshold *crit, int type) { char *p = NULL, i = 0; if (!str || !strlen(str) || !warn || !crit) { return -1; } /* pointer magic slims code by 10 lines. i is bof-stop on stupid libc's */ p = &str[strlen(str) - 1]; while (p != &str[0]) { if ((*p == 'm') || (*p == '%')) { *p = '\0'; } else if (*p == ',' && i) { *p = '\0'; /* reset it so get_timevar(str) works nicely later */ if (type == 1) { crit->rta = atof(p + 1) * 1000; } else if (type == 2) { crit->pl = (unsigned char)strtoul(p + 1, NULL, 0); } else if (type == 3) { crit->jitter = atof(p + 1); } else if (type == 4) { crit->mos = atof(p + 1); } else if (type == 5) { crit->score = atof(p + 1); } } i = 1; p--; } if (type == 1) { warn->rta = atof(p) * 1000; } else if (type == 2) { warn->pl = (unsigned char)strtoul(p, NULL, 0); } if (type == 3) { warn->jitter = atof(p); } else if (type == 4) { warn->mos = atof(p); } else if (type == 5) { warn->score = atof(p); } return 0; } unsigned short icmp_checksum(unsigned short *p, int n) { unsigned short cksum; long sum = 0; while (n > 2) { sum += *p++; n -= sizeof(unsigned short); } /* mop up the occasional odd byte */ if (n == 1) { sum += (unsigned char)*p; } sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ sum += (sum >> 16); /* add carry */ cksum = ~sum; /* ones-complement, trunc to 16 bits */ return cksum; } void print_help(void) { print_revision(progname, NP_VERSION); printf(COPYRIGHT, copyright, email); print_usage(); printf(UT_HELP_VRSN); printf(UT_EXTRA_OPTS); printf(" %s\n", "-w"); printf(" %s", _("warning threshold (currently ")); printf("%0.3fms,%u%%)\n", (float)warn.rta / 1000, warn.pl); printf(" %s\n", "-c"); printf(" %s", _("critical threshold (currently ")); printf("%0.3fms,%u%%)\n", (float)crit.rta / 1000, crit.pl); printf(" %s\n", "-R"); printf(" %s\n", _("RTA, round trip average, mode warning,critical, ex. " "100ms,200ms unit in ms")); printf(" %s\n", "-P"); printf(" %s\n", _("packet loss mode, ex. 40%,50% , unit in %")); printf(" %s\n", "-J"); printf( " %s\n", _("jitter mode warning,critical, ex. 40.000ms,50.000ms , unit in ms ")); printf(" %s\n", "-M"); printf(" %s\n", _("MOS mode, between 0 and 4.4 warning,critical, ex. 3.5,3.0")); printf(" %s\n", "-S"); printf(" %s\n", _("score mode, max value 100 warning,critical, ex. 80,70 ")); printf(" %s\n", "-O"); printf(" %s\n", _("detect out of order ICMP packts ")); printf(" %s\n", "-4"); printf(" %s\n", _("target address(es) are IPv4 and packets are ICMPv4")); printf(" %s\n", "-6"); printf(" %s\n", _("target address(es) are IPv6 and packets are ICMPv6")); printf(" %s\n", "-H"); printf(" %s\n", _("specify a target")); printf(" %s\n", "-s"); printf(" %s\n", _("specify a source IP address or device name")); printf(" %s\n", "-n"); printf(" %s", _("number of packets to send (currently ")); printf("%u)\n", packets); printf(" %s\n", "-p"); printf(" %s", _("number of packets to send (currently ")); printf("%u)\n", packets); printf(" %s\n", "-i"); printf(" %s", _("max packet interval (currently ")); printf("%0.3fms)\n", (float)pkt_interval / 1000); printf(" %s\n", "-I"); printf(" %s", _("max target interval (currently ")); printf("%0.3fms)\n", (float)target_interval / 1000); printf(" %s\n", "-m"); printf(" %s", _("number of alive hosts required for success")); printf("\n"); printf(" %s\n", "-l"); printf(" %s", _("TTL on outgoing packets (currently ")); printf("%u)\n", ttl); printf(" %s\n", "-t"); printf(" %s", _("timeout value (seconds, currently ")); printf("%u)\n", timeout); printf(" %s\n", "-b"); printf(" %s\n", _("Number of icmp data bytes to send")); printf(" %s %u + %d)\n", _("Packet size will be data bytes + icmp header (currently"), icmp_data_size, ICMP_MINLEN); printf(" %s\n", "-v"); printf(" %s\n", _("verbose")); printf("\n"); printf("%s\n", _("Notes:")); printf(" %s\n", _("If not mode R,P,J,M,S or O is informed, default icmp " "behavior, RTA and packet loss")); printf("\n"); printf(" %s\n", _("The -H switch is optional. Naming a host (or several) to " "check is not.")); printf("\n"); printf(" %s\n", _("When defining multiple addresses they must be provided as " "the last argument.")); printf("\n"); printf(" %s\n", _("Threshold format for -w and -c is 200.25,60% for 200.25 " "msec RTA and 60%")); printf( " %s\n", _("packet loss. The default values should work well for most users.")); printf(" %s\n", _("You can specify different RTA factors using the " "standardized abbreviations")); printf(" %s\n", _("us (microseconds), ms (milliseconds, default) or just " "plain s for seconds.")); /* -d not yet implemented */ /* printf ("%s\n", _("Threshold format for -d is warn,crit. 12,14 means WARNING if >= 12 hops")); printf ("%s\n", _("are spent and CRITICAL if >= 14 hops are spent.")); printf ("%s\n\n", _("NOTE: Some systems decrease TTL when forming ICMP_ECHOREPLY, others do not."));*/ printf("\n"); printf(" %s\n", _("The -v switch can be specified several times for " "increased verbosity.")); /* printf ("%s\n", _("Long options are currently unsupported."));*/ /* printf ("%s\n", _("Options marked with * require an argument"));*/ printf(UT_SUPPORT); } void print_usage(void) { printf("%s\n", _("Usage:")); printf(" %s [options] [-H] host1 host2 hostN\n", progname); }