diff options
Diffstat (limited to 'plugins-root/check_icmp.c')
| -rw-r--r-- | plugins-root/check_icmp.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/plugins-root/check_icmp.c b/plugins-root/check_icmp.c index 7636bc71..80fbf613 100644 --- a/plugins-root/check_icmp.c +++ b/plugins-root/check_icmp.c @@ -54,6 +54,7 @@ const char *email = "nagiosplug-devel@lists.sourceforge.net"; #include "netutils.h" #include "utils.h" +#include <sys/ioctl.h> #include <sys/time.h> #include <sys/types.h> #include <stdio.h> @@ -66,6 +67,7 @@ const char *email = "nagiosplug-devel@lists.sourceforge.net"; #include <ctype.h> #include <netdb.h> #include <sys/socket.h> +#include <net/if.h> #include <netinet/in_systm.h> #include <netinet/in.h> #include <netinet/ip.h> @@ -178,11 +180,13 @@ 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, char *, unsigned int, struct sockaddr *, u_int *); static int send_icmp_ping(int, struct rta_host *); static int get_threshold(char *str, threshold *th); static void run_checks(void); +static void set_source_ip(char *); static int add_target(char *); static int add_target_ip(char *, struct in_addr *); static int handle_random_icmp(struct icmp *, struct sockaddr_in *); @@ -446,7 +450,7 @@ main(int argc, char **argv) /* parse the arguments */ for(i = 1; i < argc; i++) { - while((arg = getopt(argc, argv, "vhVw:c:n:p:t:H:i:b:I:l:m:")) != EOF) { + while((arg = getopt(argc, argv, "vhVw:c:n:p:t:H:s:i:b:I:l:m:")) != EOF) { switch(arg) { case 'v': debug++; @@ -489,6 +493,9 @@ main(int argc, char **argv) crit_down = (unsigned char)strtoul(ptr + 1, NULL, 0); } break; + case 's': /* specify source IP address */ + set_source_ip(optarg); + break; case 'V': /* version */ /*print_revision (progname, revision);*/ /* FIXME: Why? */ exit (STATE_OK); @@ -1109,6 +1116,38 @@ add_target(char *arg) return 0; } + +static void +set_source_ip(char *arg) +{ + struct sockaddr_in src; + + memset(&src, 0, sizeof(src)); + src.sin_family = AF_INET; + 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; + + 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); + return ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr; +#else + errno = 0; + crash("Cannot get interface IP address on this platform."); +#endif +} + /* * u = micro * m = milli @@ -1231,6 +1270,8 @@ print_help(void) printf (" %s\n", "-c"); printf (" %s", _("critical threshold (currently ")); printf ("%0.3fms,%u%%)\n", (float)crit.rta, crit.pl); + 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); |