diff options
Diffstat (limited to 'pingu.c')
| -rw-r--r-- | pingu.c | 61 |
1 files changed, 58 insertions, 3 deletions
@@ -1,8 +1,10 @@ +#include <arpa/inet.h> #include <netinet/ip.h> #include <netinet/ip_icmp.h> #include <sys/queue.h> #include <sys/types.h> +#include <sys/socket.h> #include <sys/stat.h> #include <err.h> @@ -28,11 +30,13 @@ float default_timeout = 1.0; int default_retry = 3; char *default_up_action = NULL; char *default_down_action = NULL; +char *default_route_script = NULL; struct provider { struct sockaddr_in address; char *name; char *interface; + char *gateway; char *up_action; char *down_action; int status; @@ -135,13 +139,17 @@ int read_config(const char *file, struct provider_list *head) } else if (strcmp(key, "timeout") == 0) { default_timeout = atof(value); } else if (strcmp(key, "up-action") == 0) { - default_up_action = value; + default_up_action = xstrdup(value); } else if (strcmp(key, "down-action") == 0) { - default_down_action = value; + default_down_action = xstrdup(value); + } else if (strcmp(key, "route-script") == 0) { + default_route_script = xstrdup(value); } else log_error("host not specified"); } else if (strcmp(key, "interface") == 0) { p->interface = xstrdup(value); + } else if (strcmp(key, "gateway") == 0) { + p->gateway = xstrdup(value); } else if (strcmp(key, "name") == 0) { p->name = xstrdup(value); } else if (strcmp(key, "up-action") == 0) { @@ -225,17 +233,61 @@ void dump_provider(struct provider *p) } #endif +char *get_provider_gateway(struct provider *p) +{ + if (p->gateway != NULL) + return p->gateway; + return inet_ntoa(p->address.sin_addr); +} +void exec_route_change(struct provider_list *head) +{ + struct provider *p; + char **args; + int i = 0, status; + pid_t pid; + SLIST_FOREACH(p, head, provider_list) { + i++; + } + args = xmalloc(sizeof(char *) * (i + 2)); + + i = 0; + args[i++] = default_route_script; + SLIST_FOREACH(p, head, provider_list) { + if (p->status) + args[i++] = get_provider_gateway(p); + } + args[i] = NULL; + pid = fork(); + switch (pid) { + case -1: + log_perror("fork"); + goto free_and_return; + break; + case 0: + execvp(default_route_script, args); + log_perror(args[0]); + break; + default: + wait(&status); + } + +free_and_return: + free(args); + return; +} void ping_loop(struct provider_list *head, int interval) { struct provider *p; - int seq = 0; + int seq = 0, change; while (1) { + change = 0; seq++; SLIST_FOREACH(p, head, provider_list) { int status = (do_ping(&p->address, seq, 2, 0.3) == 0); if (status != p->status) { + change++; p->status = status; if (status) system(p->up_action); @@ -243,6 +295,9 @@ void ping_loop(struct provider_list *head, int interval) system(p->down_action); } } + if (change) + exec_route_change(head); + sleep(interval); seq &= 0xffff; } |