/**
* Object oriented C module to send ICMP and ICMPv6 `echo's.
- * Copyright (C) 2006-2010 Florian octo Forster <octo at verplant.org>
+ * Copyright (C) 2006-2016 Florian octo Forster <ff at octo.it>
*
* 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
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#ifdef __APPLE__
+#define __APPLE_USE_RFC_3542
+#endif
+
#if HAVE_CONFIG_H
# include <config.h>
#endif
char *device;
+ char set_mark;
+ int mark;
+
char errmsg[PING_ERRMSG_LEN];
pinghost_t *head;
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)
{
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)
{
cmsg != NULL;
cmsg = CMSG_NXTHDR (&msghdr, cmsg))
{
+ if (cmsg->cmsg_level == SOL_SOCKET)
+ {
#ifdef SO_TIMESTAMP
- if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SO_TIMESTAMP)
- memcpy(&pkt_now, CMSG_DATA(cmsg), sizeof(pkt_now));
+ if (cmsg->cmsg_type == SO_TIMESTAMP)
+ memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
#endif /* SO_TIMESTAMP */
-
- if (ph->addrfamily == AF_INET) /* {{{ */
+ }
+ else if (ph->addrfamily == AF_INET) /* {{{ */
{
if (cmsg->cmsg_level != IPPROTO_IP)
continue;
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),
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);
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;
if (!timerisset (ptr->timer))
continue;
+ assert (ptr->fd < FD_SETSIZE);
FD_SET (ptr->fd, &read_fds);
FD_SET (ptr->fd, &err_fds);
num_fds++;
if ((status == -1) && (errno == EINTR))
{
dprintf ("select was interrupted by signal..\n");
- continue;
+ ping_set_errno (obj, EINTR);
+ return (-EINTR);
}
else if (status < 0)
{
} /* while (1) */
return (ret);
-}
+} /* int ping_receive_all */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Sending functions: *
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->icmp_type = ICMP_ECHO;
- icmp4->icmp_code = 0;
- icmp4->icmp_cksum = 0;
- icmp4->icmp_id = htons (ph->ident);
- icmp4->icmp_seq = htons (ph->sequence);
+ *icmp4 = (struct icmp) {
+ .icmp_type = ICMP_ECHO,
+ .icmp_id = htons (ph->ident),
+ .icmp_seq = htons (ph->sequence),
+ };
- buflen = 4096 - sizeof (struct icmp);
- strncpy (data, ph->data, buflen);
- datalen = strlen (data);
+ datalen = strlen (ph->data);
+ buflen = ICMP_MINLEN + datalen;
+ if (sizeof (buf) < buflen)
+ return (EINVAL);
- buflen = datalen + sizeof (struct icmp);
+ data = buf + ICMP_MINLEN;
+ memcpy (data, ph->data, datalen);
icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
struct icmp6_hdr *icmp6;
int status;
- char buf[4096];
+ char buf[4096] = {0};
int buflen;
char *data;
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);
} /* 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) */
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)
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;
}
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)
{
{
#if WITH_DEBUG
char errbuf[PING_ERRMSG_LEN];
- dprintf ("setsockopt: %s\n",
+ dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
sstrerror (errno, errbuf, sizeof (errbuf)));
#endif
ping_set_errno (obj, errno);
}
}
#endif /* SO_BINDTODEVICE */
-#ifdef SO_TIMESTAMP
- if (1)
+#ifdef SO_MARK
+ if(obj->set_mark)
{
- int c = 1;
- setsockopt(ph->fd, SOL_SOCKET, SO_TIMESTAMP, &c, sizeof(c));
+ 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) /* {{{ */
+ {
+ int status;
+ int opt = 1;
+
+ status = setsockopt (ph->fd,
+ SOL_SOCKET, SO_TIMESTAMP,
+ &opt, sizeof (opt));
+ if (status != 0)
+ {
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ ping_set_errno (obj, errno);
+ close (ph->fd);
+ ph->fd = -1;
+ continue;
+ }
+ } /* }}} if (1) */
#endif /* SO_TIMESTAMP */
assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
{
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;
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