18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * WPA Supplicant - Layer2 packet handling with FreeBSD 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2005, Sam Leffler <sam@errno.com> 58d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * This software may be distributed under the terms of the BSD license. 704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * See README for more details. 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#if defined(__APPLE__) || defined(__GLIBC__) 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <net/bpf.h> 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* __APPLE__ */ 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <pcap.h> 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <sys/ioctl.h> 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef __sun__ 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <libdlpi.h> 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* __sun__ */ 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <sys/sysctl.h> 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* __sun__ */ 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <net/if.h> 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <net/if_dl.h> 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <net/route.h> 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include <netinet/in.h> 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eloop.h" 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "l2_packet.h" 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const u8 pae_group_addr[ETH_ALEN] = 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 }; 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct l2_packet_data { 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_t *pcap; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char ifname[100]; 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 own_addr[ETH_ALEN]; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void (*rx_callback)(void *ctx, const u8 *src_addr, 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *buf, size_t len); 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void *rx_callback_ctx; 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int l2_hdr; /* whether to include layer 2 (Ethernet) header data 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * buffers */ 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr) 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(addr, l2->own_addr, ETH_ALEN); 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto, 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *buf, size_t len) 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!l2->l2_hdr) { 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int ret; 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_ethhdr *eth = os_malloc(sizeof(*eth) + len); 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eth == NULL) 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(eth->h_dest, dst_addr, ETH_ALEN); 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(eth->h_source, l2->own_addr, ETH_ALEN); 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eth->h_proto = htons(proto); 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(eth + 1, buf, len); 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = pcap_inject(l2->pcap, (u8 *) eth, len + sizeof(*eth)); 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(eth); 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return pcap_inject(l2->pcap, buf, len); 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void l2_packet_receive(int sock, void *eloop_ctx, void *sock_ctx) 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_packet_data *l2 = eloop_ctx; 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_t *pcap = sock_ctx; 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct pcap_pkthdr hdr; 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u_char *packet; 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_ethhdr *ethhdr; 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned char *buf; 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt packet = pcap_next(pcap, &hdr); 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (packet == NULL || hdr.caplen < sizeof(*ethhdr)) 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ethhdr = (struct l2_ethhdr *) packet; 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->l2_hdr) { 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = (unsigned char *) ethhdr; 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = hdr.caplen; 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = (unsigned char *) (ethhdr + 1); 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = hdr.caplen - sizeof(*ethhdr); 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback(l2->rx_callback_ctx, ethhdr->h_source, buf, len); 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int l2_packet_init_libpcap(struct l2_packet_data *l2, 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned short protocol) 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt bpf_u_int32 pcap_maskp, pcap_netp; 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char pcap_filter[200], pcap_err[PCAP_ERRBUF_SIZE]; 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct bpf_program pcap_fp; 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_lookupnet(l2->ifname, &pcap_netp, &pcap_maskp, pcap_err); 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->pcap = pcap_open_live(l2->ifname, 2500, 0, 10, pcap_err); 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->pcap == NULL) { 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_open_live: %s\n", pcap_err); 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "ifname='%s'\n", l2->ifname); 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_datalink(l2->pcap) != DLT_EN10MB && 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_set_datalink(l2->pcap, DLT_EN10MB) < 0) { 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_set_datalink(DLT_EN10MB): %s\n", 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_geterr(l2->pcap)); 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_snprintf(pcap_filter, sizeof(pcap_filter), 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "not ether src " MACSTR " and " 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "( ether dst " MACSTR " or ether dst " MACSTR " ) and " 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "ether proto 0x%x", 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt MAC2STR(l2->own_addr), /* do not receive own packets */ 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt MAC2STR(l2->own_addr), MAC2STR(pae_group_addr), 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt protocol); 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_compile(l2->pcap, &pcap_fp, pcap_filter, 1, pcap_netp) < 0) { 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_compile: %s\n", pcap_geterr(l2->pcap)); 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_setfilter(l2->pcap, &pcap_fp) < 0) { 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "pcap_setfilter: %s\n", pcap_geterr(l2->pcap)); 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_freecode(&pcap_fp); 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef __sun__ 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * When libpcap uses BPF we must enable "immediate mode" to 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * receive frames right away; otherwise the system may 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * buffer them for us. 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt { 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int on = 1; 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ioctl(pcap_fileno(l2->pcap), BIOCIMMEDIATE, &on) < 0) { 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "%s: cannot enable immediate mode on " 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "interface %s: %s\n", 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, l2->ifname, strerror(errno)); 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* XXX should we fail? */ 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* __sun__ */ 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_register_read_sock(pcap_get_selectable_fd(l2->pcap), 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2_packet_receive, l2, l2->pcap); 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eth_get(const char *device, u8 ea[ETH_ALEN]) 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef __sun__ 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dlpi_handle_t dh; 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u32 physaddrlen = DLPI_PHYSADDR_MAX; 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 physaddr[DLPI_PHYSADDR_MAX]; 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int retval; 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt retval = dlpi_open(device, &dh, 0); 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (retval != DLPI_SUCCESS) { 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "dlpi_open error: %s", 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dlpi_strerror(retval)); 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt retval = dlpi_get_physaddr(dh, DL_CURR_PHYS_ADDR, physaddr, 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &physaddrlen); 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (retval != DLPI_SUCCESS) { 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "dlpi_get_physaddr error: %s", 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dlpi_strerror(retval)); 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dlpi_close(dh); 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(ea, physaddr, ETH_ALEN); 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt dlpi_close(dh); 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* __sun__ */ 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct if_msghdr *ifm; 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct sockaddr_dl *sdl; 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u_char *p, *buf; 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int mib[] = { CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0 }; 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((buf = os_malloc(len)) == NULL) 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) { 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(buf); 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (p = buf; p < buf + len; p += ifm->ifm_msglen) { 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ifm = (struct if_msghdr *)p; 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sdl = (struct sockaddr_dl *)(ifm + 1); 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ifm->ifm_type != RTM_IFINFO || 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (ifm->ifm_addrs & RTA_IFP) == 0) 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sdl->sdl_family != AF_LINK || sdl->sdl_nlen == 0 || 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcmp(sdl->sdl_data, device, sdl->sdl_nlen) != 0) 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(ea, LLADDR(sdl), sdl->sdl_alen); 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(buf); 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (p >= buf + len) { 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt errno = ESRCH; 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* __sun__ */ 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct l2_packet_data * l2_packet_init( 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *ifname, const u8 *own_addr, unsigned short protocol, 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void (*rx_callback)(void *ctx, const u8 *src_addr, 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *buf, size_t len), 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt void *rx_callback_ctx, int l2_hdr) 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct l2_packet_data *l2; 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2 = os_zalloc(sizeof(struct l2_packet_data)); 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2 == NULL) 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_strlcpy(l2->ifname, ifname, sizeof(l2->ifname)); 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback = rx_callback; 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->rx_callback_ctx = rx_callback_ctx; 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt l2->l2_hdr = l2_hdr; 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eth_get(l2->ifname, l2->own_addr) < 0) { 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt fprintf(stderr, "Failed to get link-level address for " 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "interface '%s'.\n", l2->ifname); 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(l2); 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2_packet_init_libpcap(l2, protocol)) { 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(l2); 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return l2; 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid l2_packet_deinit(struct l2_packet_data *l2) 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2 != NULL) { 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (l2->pcap) { 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eloop_unregister_read_sock( 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_get_selectable_fd(l2->pcap)); 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_close(l2->pcap); 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(l2); 2688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len) 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_if_t *devs, *dev; 2758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct pcap_addr *addr; 2768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct sockaddr_in *saddr; 2778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int found = 0; 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char err[PCAP_ERRBUF_SIZE + 1]; 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pcap_findalldevs(&devs, err) < 0) { 2818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "pcap_findalldevs: %s\n", err); 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (dev = devs; dev && !found; dev = dev->next) { 2868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_strcmp(dev->name, l2->ifname) != 0) 2878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 2888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt addr = dev->addresses; 2908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt while (addr) { 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt saddr = (struct sockaddr_in *) addr->addr; 2928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (saddr && saddr->sin_family == AF_INET) { 2938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_strlcpy(buf, inet_ntoa(saddr->sin_addr), 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len); 2958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt found = 1; 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt addr = addr->next; 2998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pcap_freealldevs(devs); 3038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return found ? 0 : -1; 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid l2_packet_notify_auth_start(struct l2_packet_data *l2) 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 311