wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/drivers/driver_wired.c b/src/drivers/driver_wired.c
new file mode 100644
index 0000000..618db26
--- /dev/null
+++ b/src/drivers/driver_wired.c
@@ -0,0 +1,629 @@
+/*
+ * Wired Ethernet driver interface
+ * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2004, Gunter Burchardt <tira@isx.de>
+ *
+ * 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 <net/if.h>
+#ifdef __linux__
+#include <netpacket/packet.h>
+#include <net/if_arp.h>
+#include <net/if.h>
+#endif /* __linux__ */
+#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
+#include <net/if_dl.h>
+#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) */
+#ifdef __sun__
+#include <sys/sockio.h>
+#endif /* __sun__ */
+
+#include "common.h"
+#include "eloop.h"
+#include "driver.h"
+
+#ifdef _MSC_VER
+#pragma pack(push, 1)
+#endif /* _MSC_VER */
+
+struct ieee8023_hdr {
+ u8 dest[6];
+ u8 src[6];
+ u16 ethertype;
+} STRUCT_PACKED;
+
+#ifdef _MSC_VER
+#pragma pack(pop)
+#endif /* _MSC_VER */
+
+static const u8 pae_group_addr[ETH_ALEN] =
+{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
+
+
+struct wpa_driver_wired_data {
+ char ifname[IFNAMSIZ + 1];
+ void *ctx;
+
+ int sock; /* raw packet socket for driver access */
+ int dhcp_sock; /* socket for dhcp packets */
+ int use_pae_group_addr;
+
+ int pf_sock;
+ int membership, multi, iff_allmulti, iff_up;
+};
+
+
+/* TODO: detecting new devices should eventually be changed from using DHCP
+ * snooping to trigger on any packet from a new layer 2 MAC address, e.g.,
+ * based on ebtables, etc. */
+
+struct dhcp_message {
+ u_int8_t op;
+ u_int8_t htype;
+ u_int8_t hlen;
+ u_int8_t hops;
+ u_int32_t xid;
+ u_int16_t secs;
+ u_int16_t flags;
+ u_int32_t ciaddr;
+ u_int32_t yiaddr;
+ u_int32_t siaddr;
+ u_int32_t giaddr;
+ u_int8_t chaddr[16];
+ u_int8_t sname[64];
+ u_int8_t file[128];
+ u_int32_t cookie;
+ u_int8_t options[308]; /* 312 - cookie */
+};
+
+
+static int wired_multicast_membership(int sock, int ifindex,
+ const u8 *addr, int add)
+{
+#ifdef __linux__
+ struct packet_mreq mreq;
+
+ if (sock < 0)
+ return -1;
+
+ os_memset(&mreq, 0, sizeof(mreq));
+ mreq.mr_ifindex = ifindex;
+ mreq.mr_type = PACKET_MR_MULTICAST;
+ mreq.mr_alen = ETH_ALEN;
+ os_memcpy(mreq.mr_address, addr, ETH_ALEN);
+
+ if (setsockopt(sock, SOL_PACKET,
+ add ? PACKET_ADD_MEMBERSHIP : PACKET_DROP_MEMBERSHIP,
+ &mreq, sizeof(mreq)) < 0) {
+ perror("setsockopt");
+ return -1;
+ }
+ return 0;
+#else /* __linux__ */
+ return -1;
+#endif /* __linux__ */
+}
+
+
+#ifdef __linux__
+static void handle_data(void *ctx, unsigned char *buf, size_t len)
+{
+#ifdef HOSTAPD
+ struct ieee8023_hdr *hdr;
+ u8 *pos, *sa;
+ size_t left;
+ union wpa_event_data event;
+
+ /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
+ * 2 byte ethertype */
+ if (len < 14) {
+ wpa_printf(MSG_MSGDUMP, "handle_data: too short (%lu)",
+ (unsigned long) len);
+ return;
+ }
+
+ hdr = (struct ieee8023_hdr *) buf;
+
+ switch (ntohs(hdr->ethertype)) {
+ case ETH_P_PAE:
+ wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
+ sa = hdr->src;
+ os_memset(&event, 0, sizeof(event));
+ event.new_sta.addr = sa;
+ wpa_supplicant_event(ctx, EVENT_NEW_STA, &event);
+
+ pos = (u8 *) (hdr + 1);
+ left = len - sizeof(*hdr);
+ drv_event_eapol_rx(ctx, sa, pos, left);
+ break;
+
+ default:
+ wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
+ ntohs(hdr->ethertype));
+ break;
+ }
+#endif /* HOSTAPD */
+}
+
+
+static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
+{
+ int len;
+ unsigned char buf[3000];
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ perror("recv");
+ return;
+ }
+
+ handle_data(eloop_ctx, buf, len);
+}
+
+
+static void handle_dhcp(int sock, void *eloop_ctx, void *sock_ctx)
+{
+ int len;
+ unsigned char buf[3000];
+ struct dhcp_message *msg;
+ u8 *mac_address;
+ union wpa_event_data event;
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ perror("recv");
+ return;
+ }
+
+ /* must contain at least dhcp_message->chaddr */
+ if (len < 44) {
+ wpa_printf(MSG_MSGDUMP, "handle_dhcp: too short (%d)", len);
+ return;
+ }
+
+ msg = (struct dhcp_message *) buf;
+ mac_address = (u8 *) &(msg->chaddr);
+
+ wpa_printf(MSG_MSGDUMP, "Got DHCP broadcast packet from " MACSTR,
+ MAC2STR(mac_address));
+
+ os_memset(&event, 0, sizeof(event));
+ event.new_sta.addr = mac_address;
+ wpa_supplicant_event(eloop_ctx, EVENT_NEW_STA, &event);
+}
+#endif /* __linux__ */
+
+
+static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
+{
+#ifdef __linux__
+ struct ifreq ifr;
+ struct sockaddr_ll addr;
+ struct sockaddr_in addr2;
+ int n = 1;
+
+ drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
+ if (drv->sock < 0) {
+ perror("socket[PF_PACKET,SOCK_RAW]");
+ return -1;
+ }
+
+ if (eloop_register_read_sock(drv->sock, handle_read, drv->ctx, NULL)) {
+ printf("Could not register read socket\n");
+ return -1;
+ }
+
+ os_memset(&ifr, 0, sizeof(ifr));
+ os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
+ if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
+ perror("ioctl(SIOCGIFINDEX)");
+ return -1;
+ }
+
+ os_memset(&addr, 0, sizeof(addr));
+ addr.sll_family = AF_PACKET;
+ addr.sll_ifindex = ifr.ifr_ifindex;
+ wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
+ addr.sll_ifindex);
+
+ if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ perror("bind");
+ return -1;
+ }
+
+ /* filter multicast address */
+ if (wired_multicast_membership(drv->sock, ifr.ifr_ifindex,
+ pae_group_addr, 1) < 0) {
+ wpa_printf(MSG_ERROR, "wired: Failed to add multicast group "
+ "membership");
+ return -1;
+ }
+
+ os_memset(&ifr, 0, sizeof(ifr));
+ os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
+ if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
+ perror("ioctl(SIOCGIFHWADDR)");
+ return -1;
+ }
+
+ if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
+ printf("Invalid HW-addr family 0x%04x\n",
+ ifr.ifr_hwaddr.sa_family);
+ return -1;
+ }
+ os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
+
+ /* setup dhcp listen socket for sta detection */
+ if ((drv->dhcp_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+ perror("socket call failed for dhcp");
+ return -1;
+ }
+
+ if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, drv->ctx,
+ NULL)) {
+ printf("Could not register read socket\n");
+ return -1;
+ }
+
+ os_memset(&addr2, 0, sizeof(addr2));
+ addr2.sin_family = AF_INET;
+ addr2.sin_port = htons(67);
+ addr2.sin_addr.s_addr = INADDR_ANY;
+
+ if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_REUSEADDR, (char *) &n,
+ sizeof(n)) == -1) {
+ perror("setsockopt[SOL_SOCKET,SO_REUSEADDR]");
+ return -1;
+ }
+ if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
+ sizeof(n)) == -1) {
+ perror("setsockopt[SOL_SOCKET,SO_BROADCAST]");
+ return -1;
+ }
+
+ os_memset(&ifr, 0, sizeof(ifr));
+ os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->ifname, IFNAMSIZ);
+ if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
+ (char *) &ifr, sizeof(ifr)) < 0) {
+ perror("setsockopt[SOL_SOCKET,SO_BINDTODEVICE]");
+ return -1;
+ }
+
+ if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
+ sizeof(struct sockaddr)) == -1) {
+ perror("bind");
+ return -1;
+ }
+
+ return 0;
+#else /* __linux__ */
+ return -1;
+#endif /* __linux__ */
+}
+
+
+static int wired_send_eapol(void *priv, const u8 *addr,
+ const u8 *data, size_t data_len, int encrypt,
+ const u8 *own_addr, u32 flags)
+{
+ struct wpa_driver_wired_data *drv = priv;
+ struct ieee8023_hdr *hdr;
+ size_t len;
+ u8 *pos;
+ int res;
+
+ len = sizeof(*hdr) + data_len;
+ hdr = os_zalloc(len);
+ if (hdr == NULL) {
+ printf("malloc() failed for wired_send_eapol(len=%lu)\n",
+ (unsigned long) len);
+ return -1;
+ }
+
+ os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
+ ETH_ALEN);
+ os_memcpy(hdr->src, own_addr, ETH_ALEN);
+ hdr->ethertype = htons(ETH_P_PAE);
+
+ pos = (u8 *) (hdr + 1);
+ os_memcpy(pos, data, data_len);
+
+ res = send(drv->sock, (u8 *) hdr, len, 0);
+ os_free(hdr);
+
+ if (res < 0) {
+ perror("wired_send_eapol: send");
+ printf("wired_send_eapol - packet len: %lu - failed\n",
+ (unsigned long) len);
+ }
+
+ return res;
+}
+
+
+static void * wired_driver_hapd_init(struct hostapd_data *hapd,
+ struct wpa_init_params *params)
+{
+ struct wpa_driver_wired_data *drv;
+
+ drv = os_zalloc(sizeof(struct wpa_driver_wired_data));
+ if (drv == NULL) {
+ printf("Could not allocate memory for wired driver data\n");
+ return NULL;
+ }
+
+ drv->ctx = hapd;
+ os_strlcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
+ drv->use_pae_group_addr = params->use_pae_group_addr;
+
+ if (wired_init_sockets(drv, params->own_addr)) {
+ os_free(drv);
+ return NULL;
+ }
+
+ return drv;
+}
+
+
+static void wired_driver_hapd_deinit(void *priv)
+{
+ struct wpa_driver_wired_data *drv = priv;
+
+ if (drv->sock >= 0)
+ close(drv->sock);
+
+ if (drv->dhcp_sock >= 0)
+ close(drv->dhcp_sock);
+
+ os_free(drv);
+}
+
+
+static int wpa_driver_wired_get_ssid(void *priv, u8 *ssid)
+{
+ ssid[0] = 0;
+ return 0;
+}
+
+
+static int wpa_driver_wired_get_bssid(void *priv, u8 *bssid)
+{
+ /* Report PAE group address as the "BSSID" for wired connection. */
+ os_memcpy(bssid, pae_group_addr, ETH_ALEN);
+ return 0;
+}
+
+
+static int wpa_driver_wired_get_capa(void *priv, struct wpa_driver_capa *capa)
+{
+ os_memset(capa, 0, sizeof(*capa));
+ capa->flags = WPA_DRIVER_FLAGS_WIRED;
+ return 0;
+}
+
+
+static int wpa_driver_wired_get_ifflags(const char *ifname, int *flags)
+{
+ struct ifreq ifr;
+ int s;
+
+ 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, ifname, IFNAMSIZ);
+ if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ perror("ioctl[SIOCGIFFLAGS]");
+ close(s);
+ return -1;
+ }
+ close(s);
+ *flags = ifr.ifr_flags & 0xffff;
+ return 0;
+}
+
+
+static int wpa_driver_wired_set_ifflags(const char *ifname, int flags)
+{
+ struct ifreq ifr;
+ int s;
+
+ 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, ifname, IFNAMSIZ);
+ ifr.ifr_flags = flags & 0xffff;
+ if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ perror("ioctl[SIOCSIFFLAGS]");
+ close(s);
+ return -1;
+ }
+ close(s);
+ return 0;
+}
+
+
+static int wpa_driver_wired_multi(const char *ifname, const u8 *addr, int add)
+{
+ struct ifreq ifr;
+ int s;
+
+#ifdef __sun__
+ return -1;
+#endif /* __sun__ */
+
+ 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, ifname, IFNAMSIZ);
+#ifdef __linux__
+ ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
+ os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
+#endif /* __linux__ */
+#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
+ {
+ struct sockaddr_dl *dlp;
+ dlp = (struct sockaddr_dl *) &ifr.ifr_addr;
+ dlp->sdl_len = sizeof(struct sockaddr_dl);
+ dlp->sdl_family = AF_LINK;
+ dlp->sdl_index = 0;
+ dlp->sdl_nlen = 0;
+ dlp->sdl_alen = ETH_ALEN;
+ dlp->sdl_slen = 0;
+ os_memcpy(LLADDR(dlp), addr, ETH_ALEN);
+ }
+#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
+#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
+ {
+ struct sockaddr *sap;
+ sap = (struct sockaddr *) &ifr.ifr_addr;
+ sap->sa_len = sizeof(struct sockaddr);
+ sap->sa_family = AF_UNSPEC;
+ os_memcpy(sap->sa_data, addr, ETH_ALEN);
+ }
+#endif /* defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__) */
+
+ if (ioctl(s, add ? SIOCADDMULTI : SIOCDELMULTI, (caddr_t) &ifr) < 0) {
+ perror("ioctl[SIOC{ADD/DEL}MULTI]");
+ close(s);
+ return -1;
+ }
+ close(s);
+ return 0;
+}
+
+
+static void * wpa_driver_wired_init(void *ctx, const char *ifname)
+{
+ struct wpa_driver_wired_data *drv;
+ int flags;
+
+ drv = os_zalloc(sizeof(*drv));
+ if (drv == NULL)
+ return NULL;
+ os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
+ drv->ctx = ctx;
+
+#ifdef __linux__
+ drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
+ if (drv->pf_sock < 0)
+ perror("socket(PF_PACKET)");
+#else /* __linux__ */
+ drv->pf_sock = -1;
+#endif /* __linux__ */
+
+ if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
+ !(flags & IFF_UP) &&
+ wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
+ drv->iff_up = 1;
+ }
+
+ if (wired_multicast_membership(drv->pf_sock,
+ if_nametoindex(drv->ifname),
+ pae_group_addr, 1) == 0) {
+ wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
+ "packet socket", __func__);
+ drv->membership = 1;
+ } else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
+ wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
+ "SIOCADDMULTI", __func__);
+ drv->multi = 1;
+ } else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
+ wpa_printf(MSG_INFO, "%s: Could not get interface "
+ "flags", __func__);
+ os_free(drv);
+ return NULL;
+ } else if (flags & IFF_ALLMULTI) {
+ wpa_printf(MSG_DEBUG, "%s: Interface is already configured "
+ "for multicast", __func__);
+ } else if (wpa_driver_wired_set_ifflags(ifname,
+ flags | IFF_ALLMULTI) < 0) {
+ wpa_printf(MSG_INFO, "%s: Failed to enable allmulti",
+ __func__);
+ os_free(drv);
+ return NULL;
+ } else {
+ wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
+ __func__);
+ drv->iff_allmulti = 1;
+ }
+
+ return drv;
+}
+
+
+static void wpa_driver_wired_deinit(void *priv)
+{
+ struct wpa_driver_wired_data *drv = priv;
+ int flags;
+
+ if (drv->membership &&
+ wired_multicast_membership(drv->pf_sock,
+ if_nametoindex(drv->ifname),
+ pae_group_addr, 0) < 0) {
+ wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
+ "group (PACKET)", __func__);
+ }
+
+ if (drv->multi &&
+ wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
+ wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
+ "group (SIOCDELMULTI)", __func__);
+ }
+
+ if (drv->iff_allmulti &&
+ (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
+ wpa_driver_wired_set_ifflags(drv->ifname,
+ flags & ~IFF_ALLMULTI) < 0)) {
+ wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
+ __func__);
+ }
+
+ if (drv->iff_up &&
+ wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
+ (flags & IFF_UP) &&
+ wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
+ wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
+ __func__);
+ }
+
+ if (drv->pf_sock != -1)
+ close(drv->pf_sock);
+
+ os_free(drv);
+}
+
+
+const struct wpa_driver_ops wpa_driver_wired_ops = {
+ .name = "wired",
+ .desc = "Wired Ethernet driver",
+ .hapd_init = wired_driver_hapd_init,
+ .hapd_deinit = wired_driver_hapd_deinit,
+ .hapd_send_eapol = wired_send_eapol,
+ .get_ssid = wpa_driver_wired_get_ssid,
+ .get_bssid = wpa_driver_wired_get_bssid,
+ .get_capa = wpa_driver_wired_get_capa,
+ .init = wpa_driver_wired_init,
+ .deinit = wpa_driver_wired_deinit,
+};