18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * WPA Supplicant - Layer2 packet handling with libpcap/libdnet and WinPcap 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef CONFIG_NATIVE_WINDOWS 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <sys/ioctl.h> 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_NATIVE_WINDOWS */ 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <pcap.h> 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef CONFIG_WINPCAP 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <dnet.h> 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eloop.h" 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "l2_packet.h" 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const u8 pae_group_addr[ETH_ALEN] = 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 }; 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct l2_packet_data { 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_t *pcap; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int num_fast_poll; 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth_t *eth; 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char ifname[100]; 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 own_addr[ETH_ALEN]; 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void (*rx_callback)(void *ctx, const u8 *src_addr, 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *buf, size_t len); 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void *rx_callback_ctx; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int l2_hdr; /* whether to include layer 2 (Ethernet) header in calls 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * to rx_callback */ 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr) 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(addr, l2->own_addr, ETH_ALEN); 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef CONFIG_WINPCAP 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int l2_packet_init_libdnet(struct l2_packet_data *l2) 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth_addr_t own_addr; 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->eth = eth_open(l2->ifname); 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!l2->eth) { 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt printf("Failed to open interface '%s'.\n", l2->ifname); 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt perror("eth_open"); 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eth_get(l2->eth, &own_addr) < 0) { 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt printf("Failed to get own hw address from interface '%s'.\n", 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->ifname); 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt perror("eth_get"); 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth_close(l2->eth); 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->eth = NULL; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(l2->own_addr, own_addr.data, ETH_ALEN); 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto, 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *buf, size_t len) 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int ret; 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_ethhdr *eth; 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2 == NULL) 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->l2_hdr) { 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = pcap_sendpacket(l2->pcap, buf, len); 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = eth_send(l2->eth, buf, len); 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t mlen = sizeof(*eth) + len; 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth = os_malloc(mlen); 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eth == NULL) 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(eth->h_dest, dst_addr, ETH_ALEN); 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(eth->h_source, l2->own_addr, ETH_ALEN); 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth->h_proto = htons(proto); 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(eth + 1, buf, len); 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = pcap_sendpacket(l2->pcap, (u8 *) eth, mlen); 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = eth_send(l2->eth, (u8 *) eth, mlen); 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(eth); 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef CONFIG_WINPCAP 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void l2_packet_receive(int sock, void *eloop_ctx, void *sock_ctx) 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_packet_data *l2 = eloop_ctx; 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_t *pcap = sock_ctx; 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct pcap_pkthdr hdr; 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u_char *packet; 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_ethhdr *ethhdr; 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned char *buf; 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt packet = pcap_next(pcap, &hdr); 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (packet == NULL || hdr.caplen < sizeof(*ethhdr)) 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ethhdr = (struct l2_ethhdr *) packet; 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->l2_hdr) { 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = (unsigned char *) ethhdr; 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = hdr.caplen; 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = (unsigned char *) (ethhdr + 1); 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = hdr.caplen - sizeof(*ethhdr); 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback(l2->rx_callback_ctx, ethhdr->h_source, buf, len); 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void l2_packet_receive_cb(u_char *user, const struct pcap_pkthdr *hdr, 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u_char *pkt_data) 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_packet_data *l2 = (struct l2_packet_data *) user; 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_ethhdr *ethhdr; 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned char *buf; 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pkt_data == NULL || hdr->caplen < sizeof(*ethhdr)) 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ethhdr = (struct l2_ethhdr *) pkt_data; 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->l2_hdr) { 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = (unsigned char *) ethhdr; 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = hdr->caplen; 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = (unsigned char *) (ethhdr + 1); 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = hdr->caplen - sizeof(*ethhdr); 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback(l2->rx_callback_ctx, ethhdr->h_source, buf, len); 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Use shorter poll interval for 3 seconds to reduce latency during key 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * handshake. 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->num_fast_poll = 3 * 50; 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void l2_packet_receive_timeout(void *eloop_ctx, void *timeout_ctx) 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_packet_data *l2 = eloop_ctx; 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_t *pcap = timeout_ctx; 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int timeout; 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->num_fast_poll > 0) { 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt timeout = 20000; 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->num_fast_poll--; 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt timeout = 100000; 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Register new timeout before calling l2_packet_receive() since 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * receive handler may free this l2_packet instance (which will 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * cancel this timeout). */ 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_register_timeout(0, timeout, l2_packet_receive_timeout, 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2, pcap); 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_dispatch(pcap, 10, l2_packet_receive_cb, (u_char *) l2); 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int l2_packet_init_libpcap(struct l2_packet_data *l2, 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned short protocol) 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt bpf_u_int32 pcap_maskp, pcap_netp; 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char pcap_filter[200], pcap_err[PCAP_ERRBUF_SIZE]; 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct bpf_program pcap_fp; 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char ifname[128]; 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_snprintf(ifname, sizeof(ifname), "\\Device\\NPF_%s", l2->ifname); 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_lookupnet(ifname, &pcap_netp, &pcap_maskp, pcap_err); 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->pcap = pcap_open_live(ifname, 2500, 0, 10, pcap_err); 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->pcap == NULL) { 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_open_live: %s\n", pcap_err); 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "ifname='%s'\n", ifname); 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_setnonblock(l2->pcap, 1, pcap_err) < 0) 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_setnonblock: %s\n", 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_geterr(l2->pcap)); 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_lookupnet(l2->ifname, &pcap_netp, &pcap_maskp, pcap_err); 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->pcap = pcap_open_live(l2->ifname, 2500, 0, 10, pcap_err); 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->pcap == NULL) { 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_open_live: %s\n", pcap_err); 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "ifname='%s'\n", l2->ifname); 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_datalink(l2->pcap) != DLT_EN10MB && 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_set_datalink(l2->pcap, DLT_EN10MB) < 0) { 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_set_datalink(DLT_EN10MB): %s\n", 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_geterr(l2->pcap)); 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_snprintf(pcap_filter, sizeof(pcap_filter), 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "not ether src " MACSTR " and " 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "( ether dst " MACSTR " or ether dst " MACSTR " ) and " 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "ether proto 0x%x", 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt MAC2STR(l2->own_addr), /* do not receive own packets */ 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt MAC2STR(l2->own_addr), MAC2STR(pae_group_addr), 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt protocol); 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_compile(l2->pcap, &pcap_fp, pcap_filter, 1, pcap_netp) < 0) { 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_compile: %s\n", pcap_geterr(l2->pcap)); 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_setfilter(l2->pcap, &pcap_fp) < 0) { 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_setfilter: %s\n", pcap_geterr(l2->pcap)); 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_freecode(&pcap_fp); 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef BIOCIMMEDIATE 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * When libpcap uses BPF we must enable "immediate mode" to 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * receive frames right away; otherwise the system may 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * buffer them for us. 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt { 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int on = 1; 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ioctl(pcap_fileno(l2->pcap), BIOCIMMEDIATE, &on) < 0) { 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "%s: cannot enable immediate mode on " 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "interface %s: %s\n", 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, l2->ifname, strerror(errno)); 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* XXX should we fail? */ 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* BIOCIMMEDIATE */ 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_register_timeout(0, 100000, l2_packet_receive_timeout, 2688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2, l2->pcap); 2698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 2708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_register_read_sock(pcap_get_selectable_fd(l2->pcap), 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2_packet_receive, l2, l2->pcap); 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 2758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct l2_packet_data * l2_packet_init( 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *ifname, const u8 *own_addr, unsigned short protocol, 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void (*rx_callback)(void *ctx, const u8 *src_addr, 2818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *buf, size_t len), 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void *rx_callback_ctx, int l2_hdr) 2838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_packet_data *l2; 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2 = os_zalloc(sizeof(struct l2_packet_data)); 2878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2 == NULL) 2888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 2898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_strlcpy(l2->ifname, ifname, sizeof(l2->ifname)); 2908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback = rx_callback; 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback_ctx = rx_callback_ctx; 2928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->l2_hdr = l2_hdr; 2938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 2958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (own_addr) 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(l2->own_addr, own_addr, ETH_ALEN); 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 2988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2_packet_init_libdnet(l2)) 2998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 3008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 3018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2_packet_init_libpcap(l2, protocol)) { 3038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef CONFIG_WINPCAP 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth_close(l2->eth); 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(l2); 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return l2; 3118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid l2_packet_deinit(struct l2_packet_data *l2) 3158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2 == NULL) 3178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 3208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_cancel_timeout(l2_packet_receive_timeout, l2, l2->pcap); 3218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_WINPCAP */ 3228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->eth) 3238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth_close(l2->eth); 3248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_unregister_read_sock(pcap_get_selectable_fd(l2->pcap)); 3258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 3268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->pcap) 3278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_close(l2->pcap); 3288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(l2); 3298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len) 3338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_if_t *devs, *dev; 3358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct pcap_addr *addr; 3368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct sockaddr_in *saddr; 3378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int found = 0; 3388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char err[PCAP_ERRBUF_SIZE + 1]; 3398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_findalldevs(&devs, err) < 0) { 3418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "pcap_findalldevs: %s\n", err); 3428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (dev = devs; dev && !found; dev = dev->next) { 3468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_strcmp(dev->name, l2->ifname) != 0) 3478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 3488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt addr = dev->addresses; 3508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt while (addr) { 3518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt saddr = (struct sockaddr_in *) addr->addr; 3528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (saddr && saddr->sin_family == AF_INET) { 3538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_strlcpy(buf, inet_ntoa(saddr->sin_addr), 3548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len); 3558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt found = 1; 3568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 3578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt addr = addr->next; 3598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_freealldevs(devs); 3638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return found ? 0 : -1; 3658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid l2_packet_notify_auth_start(struct l2_packet_data *l2) 3698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_WINPCAP 3718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 3728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Use shorter poll interval for 3 seconds to reduce latency during key 3738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * handshake. 3748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->num_fast_poll = 3 * 50; 3768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_cancel_timeout(l2_packet_receive_timeout, l2, l2->pcap); 3778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_register_timeout(0, 10000, l2_packet_receive_timeout, 3788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2, l2->pcap); 3798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_WINPCAP */ 3808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 381