X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fliboping.c;h=fd6e94227e4f7ff68d50c8eff308ea9d35a7afd4;hb=1eb6f8f2eff9d3f9024a6c9e70007a5684eaa462;hp=0f4c595f7c267ae26273faf0033ce6360bcc192e;hpb=cc9cb1487db0e8b93472854e1b0e9de4d4620636;p=liboping.git diff --git a/src/liboping.c b/src/liboping.c index 0f4c595..fd6e942 100644 --- a/src/liboping.c +++ b/src/liboping.c @@ -1,22 +1,26 @@ /** * Object oriented C module to send ICMP and ICMPv6 `echo's. - * Copyright (C) 2006-2009 Florian octo Forster + * Copyright (C) 2006-2016 Florian octo Forster * - * 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; only version 2 of the License is - * applicable. - * - * 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, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by the + * Free Software Foundation; either version 2.1 of the License, or (at your + * option) any later version. + * + * This library 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 Lesser General Public License + * for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#ifdef __APPLE__ +#define __APPLE_USE_RFC_3542 +#endif + #if HAVE_CONFIG_H # include #endif @@ -25,7 +29,6 @@ # include # include # include -# include # include # include # include @@ -33,6 +36,10 @@ # error "You don't have the standard C99 header files installed" #endif /* STDC_HEADERS */ +#ifdef HAVE_STDINT_H +# include +#endif + #if HAVE_UNISTD_H # include #endif @@ -61,6 +68,7 @@ #if HAVE_SYS_SOCKET_H # include #endif + #if HAVE_NETDB_H # include #endif @@ -96,6 +104,7 @@ #endif #define PING_ERRMSG_LEN 256 +#define PING_TABLE_LEN 5381 struct pinghost { @@ -106,18 +115,19 @@ struct pinghost struct sockaddr_storage *addr; socklen_t addrlen; int addrfamily; - int fd; int ident; int sequence; struct timeval *timer; double latency; uint32_t dropped; int recv_ttl; + uint8_t recv_qos; char *data; void *context; struct pinghost *next; + struct pinghost *table_next; }; struct pingobj @@ -125,14 +135,24 @@ struct pingobj double timeout; int ttl; int addrfamily; + uint8_t qos; char *data; + int fd4; + int fd6; + struct sockaddr *srcaddr; socklen_t srcaddrlen; + char *device; + + char set_mark; + int mark; + char errmsg[PING_ERRMSG_LEN]; pinghost_t *head; + pinghost_t *table[PING_TABLE_LEN]; }; /* @@ -141,7 +161,7 @@ struct pingobj /* Even though Posix requires "strerror_r" to return an "int", * some systems (e.g. the GNU libc) return a "char *" _and_ * ignore the second argument ... -tokkee */ -char *sstrerror (int errnum, char *buf, size_t buflen) +static char *sstrerror (int errnum, char *buf, size_t buflen) { buf[0] = 0; @@ -255,7 +275,8 @@ static uint16_t ping_icmp4_checksum (char *buf, size_t len) return (ret); } -static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffer_len) +static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer, + size_t buffer_len) { struct ip *ip_hdr; struct icmp *icmp_hdr; @@ -282,27 +303,25 @@ static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffe buffer += ip_hdr_len; buffer_len -= ip_hdr_len; - if (buffer_len < sizeof (struct icmp)) + if (buffer_len < ICMP_MINLEN) return (NULL); icmp_hdr = (struct icmp *) buffer; - buffer += sizeof (struct icmp); - buffer_len -= sizeof (struct icmp); - if (icmp_hdr->icmp_type != ICMP_ECHOREPLY) { - dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type); + dprintf ("Unexpected ICMP type: %"PRIu8"\n", icmp_hdr->icmp_type); return (NULL); } recv_checksum = icmp_hdr->icmp_cksum; + /* This writes to buffer. */ icmp_hdr->icmp_cksum = 0; - calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr, - sizeof (struct icmp) + buffer_len); + calc_checksum = ping_icmp4_checksum (buffer, buffer_len); if (recv_checksum != calc_checksum) { - dprintf ("Checksum missmatch: Got 0x%04x, calculated 0x%04x\n", + dprintf ("Checksum missmatch: Got 0x%04"PRIx16", " + "calculated 0x%04"PRIx16"\n", recv_checksum, calc_checksum); return (NULL); } @@ -310,7 +329,8 @@ static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffe ident = ntohs (icmp_hdr->icmp_id); seq = ntohs (icmp_hdr->icmp_seq); - for (ptr = ph; ptr != NULL; ptr = ptr->next) + for (ptr = obj->table[ident % PING_TABLE_LEN]; + ptr != NULL; ptr = ptr->table_next) { dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n", ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF)); @@ -327,7 +347,8 @@ static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffe if (((ptr->sequence - 1) & 0xFFFF) != seq) continue; - dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n", + dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", " + "seq = %"PRIu16"\n", ptr->hostname, ident, seq); break; @@ -335,10 +356,14 @@ static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffe if (ptr == NULL) { - dprintf ("No match found for ident = 0x%04x, seq = %i\n", + dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n", ident, seq); } + if (ptr != NULL){ + ptr->recv_ttl = (int) ip_hdr->ip_ttl; + ptr->recv_qos = (uint8_t) ip_hdr->ip_tos; + } return (ptr); } @@ -358,7 +383,8 @@ static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffe # endif #endif -static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffer_len) +static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer, + size_t buffer_len) { struct icmp6_hdr *icmp_hdr; @@ -367,12 +393,12 @@ static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffe pinghost_t *ptr; - if (buffer_len < sizeof (struct icmp6_hdr)) + if (buffer_len < ICMP_MINLEN) return (NULL); icmp_hdr = (struct icmp6_hdr *) buffer; - buffer += sizeof (struct icmp); - buffer_len -= sizeof (struct icmp); + buffer += ICMP_MINLEN; + buffer_len -= ICMP_MINLEN; if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY) { @@ -389,7 +415,9 @@ static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffe ident = ntohs (icmp_hdr->icmp6_id); seq = ntohs (icmp_hdr->icmp6_seq); - for (ptr = ph; ptr != NULL; ptr = ptr->next) + /* We have to iterate over all hosts, since ICMPv6 packets may + * be received on any raw v6 socket. */ + for (ptr = obj->head; ptr != NULL; ptr = ptr->next) { dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n", ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF)); @@ -406,7 +434,8 @@ static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffe if (((ptr->sequence - 1) & 0xFFFF) != seq) continue; - dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n", + dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", " + "seq = %"PRIu16"\n", ptr->hostname, ident, seq); break; @@ -414,20 +443,22 @@ static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffe if (ptr == NULL) { - dprintf ("No match found for ident = 0x%04x, seq = %i\n", + dprintf ("No match found for ident = 0x%04"PRIx16", " + "seq = %"PRIu16"\n", ident, seq); } return (ptr); } -static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) +static int ping_receive_one (pingobj_t *obj, struct timeval *now, int addrfam) { - struct timeval diff; + int fd = addrfam == AF_INET6 ? obj->fd6 : obj->fd4; + struct timeval diff, pkt_now = *now; pinghost_t *host = NULL; - int family; int recv_ttl; - + uint8_t recv_qos; + /* * Set up the receive buffer.. */ @@ -454,6 +485,9 @@ static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) msghdr.msg_controllen = sizeof (control_buffer); /* flags; this is an output only field.. */ msghdr.msg_flags = 0; +#ifdef MSG_XPG4_2 + msghdr.msg_flags |= MSG_XPG4_2; +#endif payload_buffer_len = recvmsg (fd, &msghdr, /* flags = */ 0); if (payload_buffer_len < 0) @@ -468,15 +502,30 @@ static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, fd); /* Iterate over all auxiliary data in msghdr */ - family = -1; recv_ttl = -1; + recv_qos = 0; for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */ cmsg != NULL; cmsg = CMSG_NXTHDR (&msghdr, cmsg)) { - if (cmsg->cmsg_level == IPPROTO_IP) /* {{{ */ + if (cmsg->cmsg_level == SOL_SOCKET) + { +#ifdef SO_TIMESTAMP + if (cmsg->cmsg_type == SO_TIMESTAMP) + memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now)); +#endif /* SO_TIMESTAMP */ + } + else if (addrfam == AF_INET) /* {{{ */ { - family = AF_INET; + if (cmsg->cmsg_level != IPPROTO_IP) + continue; + + if (cmsg->cmsg_type == IP_TOS) + { + memcpy (&recv_qos, CMSG_DATA (cmsg), + sizeof (recv_qos)); + dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos); + } else if (cmsg->cmsg_type == IP_TTL) { memcpy (&recv_ttl, CMSG_DATA (cmsg), @@ -489,9 +538,18 @@ static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) cmsg->cmsg_type); } } /* }}} */ - else if (cmsg->cmsg_level == IPPROTO_IPV6) /* {{{ */ + else if (addrfam == AF_INET6) /* {{{ */ { - family = AF_INET6; + if (cmsg->cmsg_level != IPPROTO_IPV6) + continue; + + if (cmsg->cmsg_type == IPV6_TCLASS) + { + memcpy (&recv_qos, CMSG_DATA (cmsg), + sizeof (recv_qos)); + dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos); + } else +#ifdef IPV6_HOPLIMIT if (cmsg->cmsg_type == IPV6_HOPLIMIT) { memcpy (&recv_ttl, CMSG_DATA (cmsg), @@ -499,6 +557,25 @@ static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) dprintf ("TTLv6 = %i;\n", recv_ttl); } else +#endif +#ifdef IPV6_UNICAST_HOPS + if (cmsg->cmsg_type == IPV6_UNICAST_HOPS) + { + memcpy (&recv_ttl, CMSG_DATA (cmsg), + sizeof (recv_ttl)); + dprintf ("TTLv6 = %i;\n", recv_ttl); + } + else +#endif +#ifdef IPV6_MULTICAST_HOPS + if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS) + { + memcpy (&recv_ttl, CMSG_DATA (cmsg), + sizeof (recv_ttl)); + dprintf ("TTLv6 = %i;\n", recv_ttl); + } + else +#endif { dprintf ("Not handling option %i.\n", cmsg->cmsg_type); @@ -512,33 +589,33 @@ static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) } } /* }}} for (cmsg) */ - if (family == AF_INET) + if (addrfam == AF_INET) { - host = ping_receive_ipv4 (ph, payload_buffer, payload_buffer_len); + host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len); if (host == NULL) return (-1); } - else if (family == AF_INET6) + else if (addrfam == AF_INET6) { - host = ping_receive_ipv6 (ph, payload_buffer, payload_buffer_len); + host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len); if (host == NULL) return (-1); } else { dprintf ("ping_receive_one: Unknown address family %i.\n", - family); + addrfam); return (-1); } dprintf ("rcvd: %12i.%06i\n", - (int) now->tv_sec, - (int) now->tv_usec); + (int) pkt_now.tv_sec, + (int) pkt_now.tv_usec); dprintf ("sent: %12i.%06i\n", (int) host->timer->tv_sec, (int) host->timer->tv_usec); - if (ping_timeval_sub (now, host->timer, &diff) < 0) + if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0) { timerclear (host->timer); return (-1); @@ -548,130 +625,18 @@ static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now) (int) diff.tv_sec, (int) diff.tv_usec); + if (recv_ttl >= 0) + host->recv_ttl = recv_ttl; + host->recv_qos = recv_qos; + host->latency = ((double) diff.tv_usec) / 1000.0; host->latency += ((double) diff.tv_sec) * 1000.0; - host->recv_ttl = recv_ttl; - timerclear (host->timer); return (0); } -static int ping_receive_all (pingobj_t *obj) -{ - fd_set readfds; - int num_readfds; - int max_readfds; - - pinghost_t *ph; - pinghost_t *ptr; - - struct timeval endtime; - struct timeval nowtime; - struct timeval timeout; - int status; - - int ret; - - ph = obj->head; - ret = 0; - - for (ptr = ph; ptr != NULL; ptr = ptr->next) - ptr->latency = -1.0; - - if (gettimeofday (&nowtime, NULL) == -1) - { - ping_set_errno (obj, errno); - return (-1); - } - - /* Set up timeout */ - timeout.tv_sec = (time_t) obj->timeout; - timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec))); - - dprintf ("Set timeout to %i.%06i seconds\n", - (int) timeout.tv_sec, - (int) timeout.tv_usec); - - ping_timeval_add (&nowtime, &timeout, &endtime); - - while (1) - { - FD_ZERO (&readfds); - num_readfds = 0; - max_readfds = -1; - - for (ptr = ph; ptr != NULL; ptr = ptr->next) - { - if (!timerisset (ptr->timer)) - continue; - - FD_SET (ptr->fd, &readfds); - num_readfds++; - - if (max_readfds < ptr->fd) - max_readfds = ptr->fd; - } - - if (num_readfds == 0) - break; - - if (gettimeofday (&nowtime, NULL) == -1) - { - ping_set_errno (obj, errno); - return (-1); - } - - if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1) - break; - - dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds, - (int) timeout.tv_sec, - (int) timeout.tv_usec); - - status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout); - - if (gettimeofday (&nowtime, NULL) == -1) - { - ping_set_errno (obj, errno); - return (-1); - } - - if ((status == -1) && (errno == EINTR)) - { - dprintf ("select was interrupted by signal..\n"); - continue; - } - else if (status < 0) - { -#if WITH_DEBUG - char errbuf[PING_ERRMSG_LEN]; - dprintf ("select: %s\n", - sstrerror (errno, errbuf, sizeof (errbuf))); -#endif - break; - } - else if (status == 0) - { - dprintf ("select timed out\n"); - for (ptr = ph; ptr != NULL; ptr = ptr->next) - if (ptr->latency < 0.0) - ptr->dropped++; - break; - } - - for (ptr = ph; ptr != NULL; ptr = ptr->next) - { - if (FD_ISSET (ptr->fd, &readfds)) - if (ping_receive_one (ptr->fd, ph, &nowtime) == 0) - ret++; - } - } /* while (1) */ - - return (ret); -} - /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Sending functions: * * * @@ -680,7 +645,7 @@ static int ping_receive_all (pingobj_t *obj) * `-> ping_send_one_ipv6 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph, - const void *buf, size_t buflen) + const void *buf, size_t buflen, int fd) { ssize_t ret; @@ -690,7 +655,7 @@ static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph, return (-1); } - ret = sendto (ph->fd, buf, buflen, 0, + ret = sendto (fd, buf, buflen, 0, (struct sockaddr *) ph->addr, ph->addrlen); if (ret < 0) @@ -709,40 +674,39 @@ static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph, return (ret); } -static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph) +static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph, int fd) { struct icmp *icmp4; int status; - char buf[4096]; - int buflen; + char buf[4096] = {0}; + size_t buflen; char *data; - int datalen; + size_t datalen; dprintf ("ph->hostname = %s\n", ph->hostname); - memset (buf, '\0', sizeof (buf)); icmp4 = (struct icmp *) buf; - data = (char *) (icmp4 + 1); + *icmp4 = (struct icmp) { + .icmp_type = ICMP_ECHO, + .icmp_id = htons (ph->ident), + .icmp_seq = htons (ph->sequence), + }; - icmp4->icmp_type = ICMP_ECHO; - icmp4->icmp_code = 0; - icmp4->icmp_cksum = 0; - icmp4->icmp_id = htons (ph->ident); - icmp4->icmp_seq = htons (ph->sequence); + datalen = strlen (ph->data); + buflen = ICMP_MINLEN + datalen; + if (sizeof (buf) < buflen) + return (EINVAL); - buflen = 4096 - sizeof (struct icmp); - strncpy (data, ph->data, buflen); - datalen = strlen (data); - - buflen = datalen + sizeof (struct icmp); + data = buf + ICMP_MINLEN; + memcpy (data, ph->data, datalen); icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen); dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident); - status = ping_sendto (obj, ph, buf, buflen); + status = ping_sendto (obj, ph, buf, buflen, fd); if (status < 0) { perror ("ping_sendto"); @@ -754,12 +718,12 @@ static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph) return (0); } -static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph) +static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph, int fd) { struct icmp6_hdr *icmp6; int status; - char buf[4096]; + char buf[4096] = {0}; int buflen; char *data; @@ -767,27 +731,26 @@ static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph) dprintf ("ph->hostname = %s\n", ph->hostname); - memset (buf, '\0', sizeof (buf)); icmp6 = (struct icmp6_hdr *) buf; - data = (char *) (icmp6 + 1); + *icmp6 = (struct icmp6_hdr) { + .icmp6_type = ICMP6_ECHO_REQUEST, + .icmp6_id = htons (ph->ident), + .icmp6_seq = htons (ph->sequence), + }; - icmp6->icmp6_type = ICMP6_ECHO_REQUEST; - icmp6->icmp6_code = 0; - /* The checksum will be calculated by the TCP/IP stack. */ - /* FIXME */ - icmp6->icmp6_cksum = 0; - icmp6->icmp6_id = htons (ph->ident); - icmp6->icmp6_seq = htons (ph->sequence); + datalen = strlen (ph->data); + buflen = sizeof (*icmp6) + datalen; + if (sizeof (buf) < buflen) + return (EINVAL); - buflen = 4096 - sizeof (struct icmp6_hdr); - strncpy (data, ph->data, buflen); - datalen = strlen (data); + data = buf + ICMP_MINLEN; + memcpy (data, ph->data, datalen); - buflen = datalen + sizeof (struct icmp6_hdr); + /* The checksum will be calculated by the TCP/IP stack. */ dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident); - status = ping_sendto (obj, ph, buf, buflen); + status = ping_sendto (obj, ph, buf, buflen, fd); if (status < 0) { perror ("ping_sendto"); @@ -799,84 +762,129 @@ static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph) return (0); } -static int ping_send_all (pingobj_t *obj) +static int ping_send_one (pingobj_t *obj, pinghost_t *ptr, int fd) { - pinghost_t *ph; - pinghost_t *ptr; - - int ret; - - ret = 0; - ph = obj->head; - - for (ptr = ph; ptr != NULL; ptr = ptr->next) + if (gettimeofday (ptr->timer, NULL) == -1) { /* start timer.. The GNU `ping6' starts the timer before * sending the packet, so I will do that too */ - if (gettimeofday (ptr->timer, NULL) == -1) - { #if WITH_DEBUG - char errbuf[PING_ERRMSG_LEN]; - dprintf ("gettimeofday: %s\n", - sstrerror (errno, errbuf, sizeof (errbuf))); + char errbuf[PING_ERRMSG_LEN]; + dprintf ("gettimeofday: %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); #endif + timerclear (ptr->timer); + return (-1); + } + else + { + dprintf ("timer set for hostname = %s\n", ptr->hostname); + } + + if (ptr->addrfamily == AF_INET6) + { + dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname); + if (ping_send_one_ipv6 (obj, ptr, fd) != 0) + { timerclear (ptr->timer); - ret--; - continue; + return (-1); } - else + } + else if (ptr->addrfamily == AF_INET) + { + dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname); + if (ping_send_one_ipv4 (obj, ptr, fd) != 0) { - dprintf ("timer set for hostname = %s\n", ptr->hostname); + timerclear (ptr->timer); + return (-1); } + } + else /* this should not happen */ + { + dprintf ("Unknown address family: %i\n", ptr->addrfamily); + timerclear (ptr->timer); + return (-1); + } - if (ptr->addrfamily == AF_INET6) - { - dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname); - if (ping_send_one_ipv6 (obj, ptr) != 0) - { - timerclear (ptr->timer); - ret--; - continue; - } - } - else if (ptr->addrfamily == AF_INET) + ptr->sequence++; + + return (0); +} + +/* + * Set the TTL of a socket protocol independently. + */ +static int ping_set_ttl (pingobj_t *obj, int ttl) +{ + int ret = 0; + char errbuf[PING_ERRMSG_LEN]; + + if (obj->fd4 != -1) + { + if (setsockopt (obj->fd4, IPPROTO_IP, IP_TTL, + &ttl, sizeof (ttl))) { - dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname); - if (ping_send_one_ipv4 (obj, ptr) != 0) - { - timerclear (ptr->timer); - ret--; - continue; - } + ret = errno; + ping_set_error (obj, "ping_set_ttl", + sstrerror (ret, errbuf, sizeof (errbuf))); + dprintf ("Setting TTLv4 failed: %s\n", errbuf); } - else /* this should not happen */ + } + + if (obj->fd6 != -1) + { + dprintf ("Setting TTLv6 to %i\n", ttl); + if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_UNICAST_HOPS, + &ttl, sizeof (ttl))) { - dprintf ("Unknown address family: %i\n", ptr->addrfamily); - timerclear (ptr->timer); - ret--; - continue; + ret = errno; + ping_set_error (obj, "ping_set_ttl", + sstrerror (ret, errbuf, sizeof (errbuf))); + dprintf ("Setting TTLv6 failed: %s\n", errbuf); } - - ptr->sequence++; } return (ret); } /* - * Set the TTL of a socket protocol independently. + * Set the TOS of a socket protocol independently. + * + * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to + * set this. See socket(7) for details. */ -static int ping_set_ttl (pinghost_t *ph, int ttl) +static int ping_set_qos (pingobj_t *obj, uint8_t qos) { - int ret = -2; + int ret = 0; + char errbuf[PING_ERRMSG_LEN]; - if (ph->addrfamily == AF_INET) + if (obj->fd4 != -1) { - ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL, &ttl, sizeof (ttl)); + dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos); + if (setsockopt (obj->fd4, IPPROTO_IP, IP_TOS, + &qos, sizeof (qos))) + { + ret = errno; + ping_set_error (obj, "ping_set_qos", + sstrerror (ret, errbuf, sizeof (errbuf))); + dprintf ("Setting TP_TOS failed: %s\n", errbuf); + } } - else if (ph->addrfamily == AF_INET6) + + if (obj->fd6 != -1) { - ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof (ttl)); + /* IPV6_TCLASS requires an "int". */ + int tmp = (int) qos; + + dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp); + if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_TCLASS, + &tmp, sizeof (tmp))) + { + ret = errno; + ping_set_error (obj, "ping_set_qos", + sstrerror (ret, errbuf, sizeof (errbuf))); + dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf); + } } return (ret); @@ -917,7 +925,7 @@ static int ping_get_ident (void) retval = (int) random (); dprintf ("Random number: %#x\n", retval); - + return (retval); } @@ -940,7 +948,6 @@ static pinghost_t *ping_alloc (void) ph->addr = (struct sockaddr_storage *) (ph->timer + 1); ph->addrlen = sizeof (struct sockaddr_storage); - ph->fd = -1; ph->latency = -1.0; ph->dropped = 0; ph->ident = ping_get_ident () & 0xFFFF; @@ -950,9 +957,6 @@ static pinghost_t *ping_alloc (void) static void ping_free (pinghost_t *ph) { - if (ph->fd >= 0) - close (ph->fd); - if (ph->username != NULL) free (ph->username); @@ -965,11 +969,169 @@ static void ping_free (pinghost_t *ph) free (ph); } +/* ping_open_socket opens, initializes and returns a new raw socket to use for + * ICMPv4 or ICMPv6 packets. addrfam must be either AF_INET or AF_INET6. On + * error, -1 is returned and obj->errmsg is set appropriately. */ +static int ping_open_socket(pingobj_t *obj, int addrfam) +{ + int fd; + if (addrfam == AF_INET6) + { + fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMPV6); + } + else if (addrfam == AF_INET) + { + fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMP); + } + else /* this should not happen */ + { + ping_set_error (obj, "ping_open_socket", "Unknown address family"); + dprintf ("Unknown address family: %i\n", addrfam); + return -1; + } + + if (fd == -1) + { + ping_set_errno (obj, errno); +#if WITH_DEBUG + char errbuf[PING_ERRMSG_LEN]; + dprintf ("socket: %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); +#endif + return -1; + } + else if (fd >= FD_SETSIZE) + { + ping_set_errno (obj, EMFILE); + dprintf ("socket(2) returned file descriptor %d, which is above the file " + "descriptor limit for select(2) (FD_SETSIZE = %d)\n", + fd, FD_SETSIZE); + close (fd); + return -1; + } + + if (obj->srcaddr != NULL) + { + assert (obj->srcaddrlen > 0); + assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage)); + + if (bind (fd, obj->srcaddr, obj->srcaddrlen) == -1) + { + ping_set_errno (obj, errno); +#if WITH_DEBUG + char errbuf[PING_ERRMSG_LEN]; + dprintf ("bind: %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); +#endif + close (fd); + return -1; + } + } + +#ifdef SO_BINDTODEVICE + if (obj->device != NULL) + { + if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE, + obj->device, strlen (obj->device) + 1) != 0) + { + ping_set_errno (obj, errno); +#if WITH_DEBUG + char errbuf[PING_ERRMSG_LEN]; + dprintf ("setsockopt (SO_BINDTODEVICE): %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); +#endif + close (fd); + return -1; + } + } +#endif /* SO_BINDTODEVICE */ +#ifdef SO_MARK + if (obj->set_mark) + { + if (setsockopt(fd, SOL_SOCKET, SO_MARK, + &obj->mark, sizeof(obj->mark)) != 0) + { + ping_set_errno (obj, errno); +#if WITH_DEBUG + char errbuf[PING_ERRMSG_LEN]; + dprintf ("setsockopt (SO_MARK): %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); +#endif + close (fd); + return -1; + } + } +#endif +#ifdef SO_TIMESTAMP + if (1) /* {{{ */ + { + int status; + int opt = 1; + + status = setsockopt (fd, + SOL_SOCKET, SO_TIMESTAMP, + &opt, sizeof (opt)); + if (status != 0) + { + ping_set_errno (obj, errno); +#if WITH_DEBUG + char errbuf[PING_ERRMSG_LEN]; + dprintf ("setsockopt (SO_TIMESTAMP): %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); +#endif + close (fd); + return -1; + } + } /* }}} if (1) */ +#endif /* SO_TIMESTAMP */ + + if (addrfam == AF_INET) + { + int opt; + +#ifdef IP_RECVTOS + /* Enable receiving the TOS field */ + opt = 1; + setsockopt (fd, IPPROTO_IP, IP_RECVTOS, + &opt, sizeof (opt)); +#endif /* IP_RECVTOS */ + + /* Enable receiving the TTL field */ + opt = 1; + setsockopt (fd, IPPROTO_IP, IP_RECVTTL, + &opt, sizeof (opt)); + } +#if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS) + else if (addrfam == AF_INET6) + { + int opt; + +# if defined(IPV6_RECVHOPLIMIT) + /* For details see RFC 3542, section 6.3. */ + opt = 1; + setsockopt (fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, + &opt, sizeof (opt)); +# endif /* IPV6_RECVHOPLIMIT */ + +# if defined(IPV6_RECVTCLASS) + /* For details see RFC 3542, section 6.5. */ + opt = 1; + setsockopt (fd, IPPROTO_IPV6, IPV6_RECVTCLASS, + &opt, sizeof (opt)); +# endif /* IPV6_RECVTCLASS */ + } +#endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */ + + return fd; +} + /* * public methods */ const char *ping_get_error (pingobj_t *obj) { + if (obj == NULL) + return (NULL); return (obj->errmsg); } @@ -979,12 +1141,15 @@ pingobj_t *ping_construct (void) if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL) return (NULL); - memset (obj, '\0', sizeof (pingobj_t)); + memset (obj, 0, sizeof (pingobj_t)); obj->timeout = PING_DEF_TIMEOUT; obj->ttl = PING_DEF_TTL; obj->addrfamily = PING_DEF_AF; obj->data = strdup (PING_DEF_DATA); + obj->qos = 0; + obj->fd4 = -1; + obj->fd6 = -1; return (obj); } @@ -994,6 +1159,9 @@ void ping_destroy (pingobj_t *obj) pinghost_t *current; pinghost_t *next; + if (obj == NULL) + return; + current = obj->head; next = NULL; @@ -1010,6 +1178,15 @@ void ping_destroy (pingobj_t *obj) if (obj->srcaddr != NULL) free (obj->srcaddr); + if (obj->device != NULL) + free (obj->device); + + if (obj->fd4 != -1) + close(obj->fd4); + + if (obj->fd6 != -1) + close(obj->fd6); + free (obj); return; @@ -1019,8 +1196,18 @@ int ping_setopt (pingobj_t *obj, int option, void *value) { int ret = 0; + if ((obj == NULL) || (value == NULL)) + return (-1); + switch (option) { + case PING_OPT_QOS: + { + obj->qos = *((uint8_t *) value); + ret = ping_set_qos (obj, obj->qos); + break; + } + case PING_OPT_TIMEOUT: obj->timeout = *((double *) value); if (obj->timeout < 0.0) @@ -1031,12 +1218,17 @@ int ping_setopt (pingobj_t *obj, int option, void *value) break; case PING_OPT_TTL: - obj->ttl = *((int *) value); - if ((obj->ttl < 1) || (obj->ttl > 255)) + ret = *((int *) value); + if ((ret < 1) || (ret > 255)) { obj->ttl = PING_DEF_TTL; ret = -1; } + else + { + obj->ttl = ret; + ret = ping_set_ttl (obj, obj->ttl); + } break; case PING_OPT_AF: @@ -1125,6 +1317,41 @@ int ping_setopt (pingobj_t *obj, int option, void *value) } /* case PING_OPT_SOURCE */ break; + case PING_OPT_DEVICE: + { +#ifdef SO_BINDTODEVICE + char *device = strdup ((char *) value); + + if (device == NULL) + { + ping_set_errno (obj, errno); + ret = -1; + break; + } + + if (obj->device != NULL) + free (obj->device); + obj->device = device; +#else /* ! SO_BINDTODEVICE */ + ping_set_errno (obj, ENOTSUP); + ret = -1; +#endif /* ! SO_BINDTODEVICE */ + } /* case PING_OPT_DEVICE */ + break; + + case PING_OPT_MARK: + { +#ifdef SO_MARK + obj->mark = *(int*)(value); + obj->set_mark = 1; +#else /* SO_MARK */ + ping_set_errno (obj, ENOTSUP); + ret = -1; +#endif /* !SO_MARK */ + + } /* case PING_OPT_MARK */ + break; + default: ret = -2; } /* switch (option) */ @@ -1132,19 +1359,187 @@ int ping_setopt (pingobj_t *obj, int option, void *value) return (ret); } /* int ping_setopt */ - int ping_send (pingobj_t *obj) { - int ret; + pinghost_t *ptr; + + struct timeval endtime; + struct timeval nowtime; + struct timeval timeout; + + int ret = 0; - if (ping_send_all (obj) < 0) + _Bool need_ipv4_socket = 0; + _Bool need_ipv6_socket = 0; + + for (ptr = obj->head; ptr != NULL; ptr = ptr->next) + { + ptr->latency = -1.0; + ptr->recv_ttl = -1; + + if (ptr->addrfamily == AF_INET) + need_ipv4_socket = 1; + else if (ptr->addrfamily == AF_INET6) + need_ipv6_socket = 1; + } + + if (!need_ipv4_socket && !need_ipv6_socket) + { + ping_set_error (obj, "ping_send", "No hosts to ping"); return (-1); + } + + if (need_ipv4_socket && obj->fd4 == -1) + { + obj->fd4 = ping_open_socket(obj, AF_INET); + if (obj->fd4 == -1) + return (-1); + ping_set_ttl (obj, obj->ttl); + ping_set_qos (obj, obj->qos); + } + if (need_ipv6_socket && obj->fd6 == -1) + { + obj->fd6 = ping_open_socket(obj, AF_INET6); + if (obj->fd6 == -1) + return (-1); + ping_set_ttl (obj, obj->ttl); + ping_set_qos (obj, obj->qos); + } + + if (gettimeofday (&nowtime, NULL) == -1) + { + ping_set_errno (obj, errno); + return (-1); + } + + /* Set up timeout */ + timeout.tv_sec = (time_t) obj->timeout; + timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec))); + + dprintf ("Set timeout to %i.%06i seconds\n", + (int) timeout.tv_sec, + (int) timeout.tv_usec); + + ping_timeval_add (&nowtime, &timeout, &endtime); + + /* host_to_ping points to the host to which to send the next ping. The + * pointer is advanced to the next host in the linked list after the + * ping has been sent. If host_to_ping is NULL, no more pings need to be + * send out. */ + pinghost_t *host_to_ping = obj->head; + + /* pings_in_flight is the number of hosts we sent a "ping" to but didn't + * receive a "pong" yet. */ + int pings_in_flight = 0; + + while (pings_in_flight > 0 || host_to_ping != NULL) + { + fd_set read_fds; + fd_set write_fds; + + int write_fd = -1; + int max_fd = -1; + + FD_ZERO (&read_fds); + FD_ZERO (&write_fds); + + if (obj->fd4 != -1) + { + FD_SET(obj->fd4, &read_fds); + if (host_to_ping != NULL && host_to_ping->addrfamily == AF_INET) + write_fd = obj->fd4; + + if (max_fd < obj->fd4) + max_fd = obj->fd4; + } + + if (obj->fd6 != -1) + { + FD_SET(obj->fd6, &read_fds); + if (host_to_ping != NULL && host_to_ping->addrfamily == AF_INET6) + write_fd = obj->fd6; + + if (max_fd < obj->fd6) + max_fd = obj->fd6; + } + + if (write_fd != -1) + FD_SET(write_fd, &write_fds); + + assert (max_fd != -1); + assert (max_fd < FD_SETSIZE); + + if (gettimeofday (&nowtime, NULL) == -1) + { + ping_set_errno (obj, errno); + return (-1); + } + + if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1) + break; - if ((ret = ping_receive_all (obj)) < 0) - return (-2); + dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds, + (int) timeout.tv_sec, + (int) timeout.tv_usec); + + int status = select (max_fd + 1, &read_fds, &write_fds, NULL, &timeout); + + if (gettimeofday (&nowtime, NULL) == -1) + { + ping_set_errno (obj, errno); + return (-1); + } + + if (status == -1) + { + ping_set_errno (obj, errno); + dprintf ("select: %s\n", obj->errmsg); + return (-1); + } + else if (status == 0) + { + dprintf ("select timed out\n"); + + pinghost_t *ph; + for (ph = obj->head; ph != NULL; ph = ph->next) + if (ph->latency < 0.0) + ph->dropped++; + break; + } + + /* first, check if we can receive a reply ... */ + if (obj->fd6 != -1 && FD_ISSET (obj->fd6, &read_fds)) + { + if (ping_receive_one (obj, &nowtime, AF_INET6) == 0) + pings_in_flight--; + continue; + } + if (obj->fd4 != -1 && FD_ISSET (obj->fd4, &read_fds)) + { + if (ping_receive_one (obj, &nowtime, AF_INET) == 0) + pings_in_flight--; + continue; + } + + /* ... and if no reply is available to read, continue sending + * out pings. */ + + /* this condition should always be true. We keep it for + * consistency with the read blocks above and just to be on the + * safe side. */ + if (write_fd != -1 && FD_ISSET (write_fd, &write_fds)) + { + if (ping_send_one (obj, host_to_ping, write_fd) == 0) + pings_in_flight++; + else + ret--; + host_to_ping = host_to_ping->next; + continue; + } + } /* while (1) */ return (ret); -} +} /* int ping_send */ static pinghost_t *ping_host_search (pinghost_t *ph, const char *host) { @@ -1167,6 +1562,9 @@ int ping_host_add (pingobj_t *obj, const char *host) struct addrinfo *ai_list, *ai_ptr; int ai_return; + if ((obj == NULL) || (host == NULL)) + return (-1); + dprintf ("host = %s\n", host); if (ping_host_search (obj->head, host) != NULL) @@ -1235,8 +1633,6 @@ int ping_host_add (pingobj_t *obj, const char *host) for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) { - ph->fd = -1; - if (ai_ptr->ai_family == AF_INET) { ai_ptr->ai_socktype = SOCK_RAW; @@ -1254,44 +1650,11 @@ int ping_host_add (pingobj_t *obj, const char *host) snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family); errmsg[PING_ERRMSG_LEN - 1] = '\0'; - dprintf (errmsg); + dprintf ("%s", errmsg); ping_set_error (obj, "getaddrinfo", errmsg); continue; } - /* TODO: Move this to a static function `ping_open_socket' and - * call it whenever the socket dies. */ - ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol); - if (ph->fd == -1) - { -#if WITH_DEBUG - char errbuf[PING_ERRMSG_LEN]; - dprintf ("socket: %s\n", - sstrerror (errno, errbuf, sizeof (errbuf))); -#endif - ping_set_errno (obj, errno); - continue; - } - - if (obj->srcaddr != NULL) - { - assert (obj->srcaddrlen > 0); - assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage)); - - if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1) - { -#if WITH_DEBUG - char errbuf[PING_ERRMSG_LEN]; - dprintf ("bind: %s\n", - sstrerror (errno, errbuf, sizeof (errbuf))); -#endif - ping_set_errno (obj, errno); - close (ph->fd); - ph->fd = -1; - continue; - } - } - assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen); memset (ph->addr, '\0', sizeof (struct sockaddr_storage)); memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen); @@ -1319,33 +1682,10 @@ int ping_host_add (pingobj_t *obj, const char *host) } } #endif /* AI_CANONNAME */ - - if (ph->addrfamily == AF_INET) - { - int opt = 1; - - setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL, - &opt, sizeof (opt)); - } - else if (ph->addrfamily == AF_INET6) - { - int opt = 1; - - setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, - &opt, sizeof (opt)); - } - - break; - } + } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */ freeaddrinfo (ai_list); - if (ph->fd < 0) - { - ping_free (ph); - return (-1); - } - /* * Adding in the front is much easier, but then the iterator will * return the host that was added last as first host. That's just not @@ -1367,14 +1707,18 @@ int ping_host_add (pingobj_t *obj, const char *host) hptr->next = ph; } - ping_set_ttl (ph, obj->ttl); + ph->table_next = obj->table[ph->ident % PING_TABLE_LEN]; + obj->table[ph->ident % PING_TABLE_LEN] = ph; return (0); } /* int ping_host_add */ int ping_host_remove (pingobj_t *obj, const char *host) { - pinghost_t *pre, *cur; + pinghost_t *pre, *cur, *target; + + if ((obj == NULL) || (host == NULL)) + return (-1); pre = NULL; cur = obj->head; @@ -1398,7 +1742,33 @@ int ping_host_remove (pingobj_t *obj, const char *host) obj->head = cur->next; else pre->next = cur->next; - + + target = cur; + pre = NULL; + + cur = obj->table[target->ident % PING_TABLE_LEN]; + + while (cur != NULL) + { + if (cur == target) + break; + + pre = cur; + cur = cur->table_next; + } + + if (cur == NULL) + { + ping_set_error(obj, "ping_host_remove", "Host not found (T)"); + ping_free(target); + return (-1); + } + + if (pre == NULL) + obj->table[target->ident % PING_TABLE_LEN] = cur->table_next; + else + pre->table_next = cur->table_next; + ping_free (cur); return (0); @@ -1406,11 +1776,15 @@ int ping_host_remove (pingobj_t *obj, const char *host) pingobj_iter_t *ping_iterator_get (pingobj_t *obj) { + if (obj == NULL) + return (NULL); return ((pingobj_iter_t *) obj->head); } pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter) { + if (iter == NULL) + return (NULL); return ((pingobj_iter_t *) iter->next); } @@ -1421,6 +1795,12 @@ int ping_iterator_get_info (pingobj_iter_t *iter, int info, size_t orig_buffer_len = *buffer_len; + if ((iter == NULL) || (buffer_len == NULL)) + return (-1); + + if ((buffer == NULL) && (*buffer_len != 0 )) + return (-1); + switch (info) { case PING_INFO_USERNAME: @@ -1533,6 +1913,16 @@ int ping_iterator_get_info (pingobj_iter_t *iter, int info, *((int *) buffer) = iter->recv_ttl; ret = 0; break; + + case PING_INFO_RECV_QOS: + ret = ENOMEM; + if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned); + if (!*buffer_len) *buffer_len=1; + if (orig_buffer_len < *buffer_len) + break; + memcpy(buffer,&iter->recv_qos,*buffer_len); + ret = 0; + break; } return (ret); @@ -1540,10 +1930,14 @@ int ping_iterator_get_info (pingobj_iter_t *iter, int info, void *ping_iterator_get_context (pingobj_iter_t *iter) { + if (iter == NULL) + return (NULL); return (iter->context); } void ping_iterator_set_context (pingobj_iter_t *iter, void *context) { + if (iter == NULL) + return; iter->context = context; }