+++ /dev/null
-/*
- * WPA Supplicant - Layer2 packet handling with Linux packet sockets
- * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "includes.h"
-#include <sys/ioctl.h>
-#include <netpacket/packet.h>
-#include <net/if.h>
-
-#include "common.h"
-#include "eloop.h"
-#include "l2_packet.h"
-
-
-struct l2_packet_data {
- int fd; /* packet socket for EAPOL frames */
- char ifname[IFNAMSIZ + 1];
- int ifindex;
- u8 own_addr[ETH_ALEN];
- void (*rx_callback)(void *ctx, const u8 *src_addr,
- const u8 *buf, size_t len);
- void *rx_callback_ctx;
- int l2_hdr; /* whether to include layer 2 (Ethernet) header data
- * buffers */
-};
-
-
-int l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr)
-{
- os_memcpy(addr, l2->own_addr, ETH_ALEN);
- return 0;
-}
-
-
-int l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto,
- const u8 *buf, size_t len)
-{
- int ret;
- if (l2 == NULL)
- return -1;
- if (l2->l2_hdr) {
- ret = send(l2->fd, buf, len, 0);
- if (ret < 0)
- perror("l2_packet_send - send");
- } else {
- struct sockaddr_ll ll;
- os_memset(&ll, 0, sizeof(ll));
- ll.sll_family = AF_PACKET;
- ll.sll_ifindex = l2->ifindex;
- ll.sll_protocol = htons(proto);
- ll.sll_halen = ETH_ALEN;
- os_memcpy(ll.sll_addr, dst_addr, ETH_ALEN);
- ret = sendto(l2->fd, buf, len, 0, (struct sockaddr *) &ll,
- sizeof(ll));
- if (ret < 0)
- perror("l2_packet_send - sendto");
- }
- return ret;
-}
-
-
-static void l2_packet_receive(int sock, void *eloop_ctx, void *sock_ctx)
-{
- struct l2_packet_data *l2 = eloop_ctx;
- u8 buf[2300];
- int res;
- struct sockaddr_ll ll;
- socklen_t fromlen;
-
- os_memset(&ll, 0, sizeof(ll));
- fromlen = sizeof(ll);
- res = recvfrom(sock, buf, sizeof(buf), 0, (struct sockaddr *) &ll,
- &fromlen);
- if (res < 0) {
- perror("l2_packet_receive - recvfrom");
- return;
- }
-
- l2->rx_callback(l2->rx_callback_ctx, ll.sll_addr, buf, res);
-}
-
-
-struct l2_packet_data * l2_packet_init(
- const char *ifname, const u8 *own_addr, unsigned short protocol,
- void (*rx_callback)(void *ctx, const u8 *src_addr,
- const u8 *buf, size_t len),
- void *rx_callback_ctx, int l2_hdr)
-{
- struct l2_packet_data *l2;
- struct ifreq ifr;
- struct sockaddr_ll ll;
-
- l2 = os_zalloc(sizeof(struct l2_packet_data));
- if (l2 == NULL)
- return NULL;
- os_strlcpy(l2->ifname, ifname, sizeof(l2->ifname));
- l2->rx_callback = rx_callback;
- l2->rx_callback_ctx = rx_callback_ctx;
- l2->l2_hdr = l2_hdr;
-
- l2->fd = socket(PF_PACKET, l2_hdr ? SOCK_RAW : SOCK_DGRAM,
- htons(protocol));
- if (l2->fd < 0) {
- perror("socket(PF_PACKET)");
- os_free(l2);
- return NULL;
- }
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, l2->ifname, sizeof(ifr.ifr_name));
- if (ioctl(l2->fd, SIOCGIFINDEX, &ifr) < 0) {
- perror("ioctl[SIOCGIFINDEX]");
- close(l2->fd);
- os_free(l2);
- return NULL;
- }
- l2->ifindex = ifr.ifr_ifindex;
-
- os_memset(&ll, 0, sizeof(ll));
- ll.sll_family = PF_PACKET;
- ll.sll_ifindex = ifr.ifr_ifindex;
- ll.sll_protocol = htons(protocol);
- if (bind(l2->fd, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
- perror("bind[PF_PACKET]");
- close(l2->fd);
- os_free(l2);
- return NULL;
- }
-
- if (ioctl(l2->fd, SIOCGIFHWADDR, &ifr) < 0) {
- perror("ioctl[SIOCGIFHWADDR]");
- close(l2->fd);
- os_free(l2);
- return NULL;
- }
- os_memcpy(l2->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
-
- eloop_register_read_sock(l2->fd, l2_packet_receive, l2, NULL);
-
- return l2;
-}
-
-
-void l2_packet_deinit(struct l2_packet_data *l2)
-{
- if (l2 == NULL)
- return;
-
- if (l2->fd >= 0) {
- eloop_unregister_read_sock(l2->fd);
- close(l2->fd);
- }
-
- os_free(l2);
-}
-
-
-int l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len)
-{
- int s;
- struct ifreq ifr;
- struct sockaddr_in *saddr;
- size_t res;
-
- s = socket(PF_INET, SOCK_DGRAM, 0);
- if (s < 0) {
- perror("socket");
- return -1;
- }
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, l2->ifname, sizeof(ifr.ifr_name));
- if (ioctl(s, SIOCGIFADDR, &ifr) < 0) {
- if (errno != EADDRNOTAVAIL)
- perror("ioctl[SIOCGIFADDR]");
- close(s);
- return -1;
- }
- close(s);
- saddr = aliasing_hide_typecast(&ifr.ifr_addr, struct sockaddr_in);
- if (saddr->sin_family != AF_INET)
- return -1;
- res = os_strlcpy(buf, inet_ntoa(saddr->sin_addr), len);
- if (res >= len)
- return -1;
- return 0;
-}
-
-
-void l2_packet_notify_auth_start(struct l2_packet_data *l2)
-{
-}
projects / mech_eap.git / blobdiff