X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fliboping.c;h=4626e6d26e55710ca89c8fee94dc0106184c9e69;hb=8fe50ddb4a18b033f8ea63ef36393ef8b1033f64;hp=83ca9c242c072cb61622ede4c0058d51c9036f69;hpb=db412c89c4d3b899929d58d0eb44845cd029730a;p=liboping.git diff --git a/src/liboping.c b/src/liboping.c index 83ca9c2..4626e6d 100644 --- a/src/liboping.c +++ b/src/liboping.c @@ -1,6 +1,6 @@ /** * Object oriented C module to send ICMP and ICMPv6 `echo's. - * Copyright (C) 2006-2011 Florian octo Forster + * Copyright (C) 2006-2016 Florian octo Forster * * 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 @@ -17,6 +17,10 @@ * 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 @@ -138,6 +142,9 @@ struct pingobj char *device; + char set_mark; + int mark; + char errmsg[PING_ERRMSG_LEN]; pinghost_t *head; @@ -291,23 +298,20 @@ static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer, 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) { @@ -385,12 +389,12 @@ static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer, 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) { @@ -545,6 +549,7 @@ static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph, 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), @@ -552,6 +557,25 @@ static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph, 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); @@ -613,6 +637,9 @@ static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph, return (0); } +/* Blocks until a packet was received from all hosts or the timeout is reached. + * When interrupted, (-EINTR) is returned. On error, -1 is returned. On + * success, returns zero. */ static int ping_receive_all (pingobj_t *obj) { fd_set read_fds; @@ -667,6 +694,7 @@ static int ping_receive_all (pingobj_t *obj) if (!timerisset (ptr->timer)) continue; + assert (ptr->fd < FD_SETSIZE); FD_SET (ptr->fd, &read_fds); FD_SET (ptr->fd, &err_fds); num_fds++; @@ -702,7 +730,8 @@ static int ping_receive_all (pingobj_t *obj) if ((status == -1) && (errno == EINTR)) { dprintf ("select was interrupted by signal..\n"); - continue; + ping_set_errno (obj, EINTR); + return (-EINTR); } else if (status < 0) { @@ -740,7 +769,7 @@ static int ping_receive_all (pingobj_t *obj) } /* while (1) */ return (ret); -} +} /* int ping_receive_all */ /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Sending functions: * @@ -784,29 +813,28 @@ static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph) 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); @@ -829,7 +857,7 @@ static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph) struct icmp6_hdr *icmp6; int status; - char buf[4096]; + char buf[4096] = {0}; int buflen; char *data; @@ -837,23 +865,22 @@ 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); @@ -1294,6 +1321,19 @@ int ping_setopt (pingobj_t *obj, int option, void *value) } /* 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) */ @@ -1304,18 +1344,13 @@ int ping_setopt (pingobj_t *obj, int option, void *value) int ping_send (pingobj_t *obj) { - int ret; - if (obj == NULL) return (-1); if (ping_send_all (obj) < 0) return (-1); - if ((ret = ping_receive_all (obj)) < 0) - return (-2); - - return (ret); + return (ping_receive_all (obj)); } static pinghost_t *ping_host_search (pinghost_t *ph, const char *host) @@ -1447,6 +1482,16 @@ int ping_host_add (pingobj_t *obj, const char *host) ping_set_errno (obj, errno); continue; } + else if (ph->fd >= FD_SETSIZE) + { + dprintf("socket(2) returned file descriptor %d, which is above the file " + "descriptor limit for select(2) (FD_SETSIZE = %d)\n", + ph->fd, FD_SETSIZE); + close(ph->fd); + ph->fd = -1; + ping_set_errno(obj, EMFILE); + continue; + } if (obj->srcaddr != NULL) { @@ -1485,6 +1530,23 @@ int ping_host_add (pingobj_t *obj, const char *host) } } #endif /* SO_BINDTODEVICE */ +#ifdef SO_MARK + if(obj->set_mark) + { + if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0) + { +#if WITH_DEBUG + char errbuf[PING_ERRMSG_LEN]; + dprintf ("setsockopt (SO_MARK): %s\n", + sstrerror (errno, errbuf, sizeof (errbuf))); +#endif + ping_set_errno (obj, errno); + close (ph->fd); + ph->fd = -1; + continue; + } + } +#endif #ifdef SO_TIMESTAMP if (1) /* {{{ */ { @@ -1540,10 +1602,12 @@ int ping_host_add (pingobj_t *obj, const char *host) { int opt; +#ifdef IP_RECVTOS /* Enable receiving the TOS field */ opt = 1; setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS, &opt, sizeof (opt)); +#endif /* IP_RECVTOS */ /* Enable receiving the TTL field */ opt = 1; @@ -1658,6 +1722,20 @@ pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter) return ((pingobj_iter_t *) iter->next); } +int ping_iterator_count (pingobj_t *obj) +{ + if (obj == NULL) + return 0; + + int count = 0; + pingobj_iter_t *iter = obj->head; + while (iter) { + count++; + iter = iter->next; + } + return count; +} + int ping_iterator_get_info (pingobj_iter_t *iter, int info, void *buffer, size_t *buffer_len) {