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#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ev.h>
#include "list.h"
#include "log.h"
#include "pingu_burst.h"
#include "pingu_host.h"
#include "pingu_iface.h"
#include "pingu_ping.h"
static struct list_head iface_list = LIST_INITIALIZER(iface_list);
static void pingu_iface_socket_cb(struct ev_loop *loop, struct ev_io *w,
int revents)
{
struct pingu_iface *iface = container_of(w, struct pingu_iface, socket_watcher);
if (revents & EV_READ)
pingu_ping_read_reply(loop, iface);
}
int pingu_iface_bind_socket(struct pingu_iface *iface, int log_error)
{
int r;
if (iface->name[0] == '\0')
return 0;
r = setsockopt(iface->fd, SOL_SOCKET, SO_BINDTODEVICE, iface->name,
strlen(iface->name));
if (r < 0 && log_error)
log_perror(iface->name);
iface->has_binding = (r == 0);
return r;
}
static int pingu_iface_init_socket(struct ev_loop *loop,
struct pingu_iface *iface)
{
iface->fd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
if (iface->fd < 0) {
log_perror("socket");
return -1;
}
ev_io_init(&iface->socket_watcher, pingu_iface_socket_cb, iface->fd, EV_READ);
ev_io_start(loop, &iface->socket_watcher);
pingu_iface_bind_socket(iface, 1);
return 0;
}
struct pingu_iface *pingu_iface_find(const char *name)
{
struct pingu_iface *iface;
list_for_each_entry(iface, &iface_list, iface_list_entry) {
if (name == NULL) {
if (iface->name[0] == '\n')
return iface;
} else if (strncmp(name, iface->name, sizeof(iface->name)) == 0)
return iface;
}
return NULL;
}
struct pingu_iface *pingu_iface_find_or_create(struct ev_loop *loop, const char *name)
{
struct pingu_iface *iface = pingu_iface_find(name);
if (iface != NULL)
return iface;
iface = calloc(1, sizeof(struct pingu_iface));
if (iface == NULL) {
log_perror("calloc(iface)");
return NULL;
}
if (name != NULL)
strlcpy(iface->name, name, sizeof(iface->name));
if (pingu_iface_init_socket(loop, iface) == -1) {
free(iface);
return NULL;
}
list_init(&iface->ping_list);
list_add(&iface->iface_list_entry, &iface_list);
return iface;
}
int pingu_iface_init(struct ev_loop *loop, struct list_head *host_list)
{
struct pingu_host *host;
struct pingu_iface *iface;
list_for_each_entry(host, host_list, host_list_entry) {
iface = pingu_iface_find_or_create(loop, host->interface);
if (iface == NULL)
return -1;
host->iface = iface;
}
return 0;
}
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