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/*
* Linux packet socket monitor
* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include <net/if.h>
#include <netpacket/packet.h>
#include "utils/common.h"
#include "utils/eloop.h"
#include "wlantest.h"
static void monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
{
struct wlantest *wt = eloop_ctx;
u8 buf[3000];
int len;
len = recv(sock, buf, sizeof(buf), 0);
if (len < 0) {
wpa_printf(MSG_INFO, "recv(PACKET): %s", strerror(errno));
return;
}
write_pcap_captured(wt, buf, len);
wlantest_process(wt, buf, len);
}
static void monitor_read_wired(int sock, void *eloop_ctx, void *sock_ctx)
{
struct wlantest *wt = eloop_ctx;
u8 buf[3000];
int len;
len = recv(sock, buf, sizeof(buf), 0);
if (len < 0) {
wpa_printf(MSG_INFO, "recv(PACKET): %s", strerror(errno));
return;
}
wlantest_process_wired(wt, buf, len);
}
int monitor_init(struct wlantest *wt, const char *ifname)
{
struct sockaddr_ll ll;
os_memset(&ll, 0, sizeof(ll));
ll.sll_family = AF_PACKET;
ll.sll_ifindex = if_nametoindex(ifname);
if (ll.sll_ifindex == 0) {
wpa_printf(MSG_ERROR, "Monitor interface '%s' does not exist",
ifname);
return -1;
}
wt->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (wt->monitor_sock < 0) {
wpa_printf(MSG_ERROR, "socket(PF_PACKET,SOCK_RAW): %s",
strerror(errno));
return -1;
}
if (bind(wt->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
wpa_printf(MSG_ERROR, "bind(PACKET): %s", strerror(errno));
close(wt->monitor_sock);
wt->monitor_sock = -1;
return -1;
}
if (eloop_register_read_sock(wt->monitor_sock, monitor_read, wt, NULL))
{
wpa_printf(MSG_ERROR, "Could not register monitor read "
"socket");
close(wt->monitor_sock);
wt->monitor_sock = -1;
return -1;
}
return 0;
}
int monitor_init_wired(struct wlantest *wt, const char *ifname)
{
struct sockaddr_ll ll;
os_memset(&ll, 0, sizeof(ll));
ll.sll_family = AF_PACKET;
ll.sll_ifindex = if_nametoindex(ifname);
if (ll.sll_ifindex == 0) {
wpa_printf(MSG_ERROR, "Monitor interface '%s' does not exist",
ifname);
return -1;
}
wt->monitor_wired = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (wt->monitor_wired < 0) {
wpa_printf(MSG_ERROR, "socket(PF_PACKET,SOCK_RAW): %s",
strerror(errno));
return -1;
}
if (bind(wt->monitor_wired, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
wpa_printf(MSG_ERROR, "bind(PACKET): %s", strerror(errno));
close(wt->monitor_wired);
wt->monitor_wired = -1;
return -1;
}
if (eloop_register_read_sock(wt->monitor_wired, monitor_read_wired,
wt, NULL)) {
wpa_printf(MSG_ERROR, "Could not register monitor read "
"socket");
close(wt->monitor_wired);
wt->monitor_wired = -1;
return -1;
}
return 0;
}
void monitor_deinit(struct wlantest *wt)
{
if (wt->monitor_sock >= 0) {
eloop_unregister_read_sock(wt->monitor_sock);
close(wt->monitor_sock);
wt->monitor_sock = -1;
}
if (wt->monitor_wired >= 0) {
eloop_unregister_read_sock(wt->monitor_wired);
close(wt->monitor_wired);
wt->monitor_wired = -1;
}
}
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