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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"
#include "sockaddr_util.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);
return 0;
}
int pingu_iface_usable(struct pingu_iface *iface)
{
if (iface->name[0] == '\0')
return 1;
return iface->has_link && iface->has_binding;
}
struct pingu_iface *pingu_iface_get_by_name(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_get_by_index(int index)
{
struct pingu_iface *iface;
list_for_each_entry(iface, &iface_list, iface_list_entry) {
if (iface->index == index)
return iface;
}
return NULL;
}
struct pingu_iface *pingu_iface_new(struct ev_loop *loop, const char *name)
{
struct pingu_iface *iface = pingu_iface_get_by_name(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;
}
void pingu_iface_set_addr(struct pingu_iface *iface, int family,
void *data, int len)
{
sockaddr_init(&iface->primary_addr, family, data);
if (len <= 0 || data == NULL) {
log_debug("%s: address removed", iface->name);
return;
}
log_debug("%s: new address: %s", iface->name,
inet_ntoa(iface->primary_addr.sin.sin_addr));
}
void pingu_gateway_add_sorted(struct pingu_iface *iface,
struct pingu_gateway *new_gw)
{
struct pingu_gateway *gw;
list_for_each_entry(gw, &iface->gateway_list, gateway_list_entry) {
if (gw->metric > new_gw->metric) {
list_add_tail(&new_gw->gateway_list_entry,
&gw->gateway_list_entry);
return;
}
}
list_add_tail(&new_gw->gateway_list_entry, &iface->gateway_list);
}
struct pingu_gateway *pingu_gateway_new(int family, void *addr,
int metric)
{
struct pingu_gateway *gw = calloc(1, sizeof(struct pingu_gateway));
if (gw == NULL) {
log_perror("Failed to allocate gateway");
return NULL;
}
gw->gw.sa.sa_family = family;
gw->metric = metric;
switch (family) {
case AF_INET:
memcpy(&gw->gw.sin.sin_addr, addr,
sizeof(gw->gw.sin.sin_addr));
break;
case AF_INET6:
memcpy(&gw->gw.sin6.sin6_addr, addr,
sizeof(gw->gw.sin6.sin6_addr));
break;
}
return gw;
}
void pingu_iface_add_gateway(struct pingu_iface *iface, int family,
void *addr, int metric)
{
struct pingu_gateway *gw = pingu_gateway_new(family, addr,
metric);
if (gw != NULL)
pingu_gateway_add_sorted(iface, gw);
}
int pingu_iface_init(struct ev_loop *loop, struct list_head *host_list)
{
struct pingu_host *host;
struct pingu_iface *iface;
int autotbl = 10;
list_for_each_entry(host, host_list, host_list_entry) {
iface = pingu_iface_get_by_name(host->interface);
if (iface == NULL) {
iface = pingu_iface_new(loop, host->interface);
iface->route_table = autotbl++;
}
if (iface == NULL)
return -1;
host->iface = iface;
}
return 0;
}
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