![Sabrina Dubroca](/assets/img/avatar_default.png)
This continues refactoring of the common parts of wired drivers code into a shared file, so that they can be reused by other drivers. Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
430 lines
9.9 KiB
C
430 lines
9.9 KiB
C
/*
|
|
* Wired Ethernet driver interface
|
|
* Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
|
|
* Copyright (c) 2004, Gunter Burchardt <tira@isx.de>
|
|
*
|
|
* This software may be distributed under the terms of the BSD license.
|
|
* See README for more details.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#include "common.h"
|
|
#include "eloop.h"
|
|
#include "driver.h"
|
|
#include "driver_wired_common.h"
|
|
|
|
#include <sys/ioctl.h>
|
|
#undef IFNAMSIZ
|
|
#include <net/if.h>
|
|
#ifdef __linux__
|
|
#include <netpacket/packet.h>
|
|
#include <net/if_arp.h>
|
|
#endif /* __linux__ */
|
|
#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
|
|
#include <net/if_dl.h>
|
|
#include <net/if_media.h>
|
|
#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) */
|
|
#ifdef __sun__
|
|
#include <sys/sockio.h>
|
|
#endif /* __sun__ */
|
|
|
|
#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 */
|
|
|
|
|
|
struct wpa_driver_wired_data {
|
|
struct driver_wired_common_data common;
|
|
|
|
int dhcp_sock; /* socket for dhcp packets */
|
|
int use_pae_group_addr;
|
|
};
|
|
|
|
|
|
/* 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 */
|
|
};
|
|
|
|
|
|
#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) {
|
|
wpa_printf(MSG_ERROR, "recv: %s", strerror(errno));
|
|
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) {
|
|
wpa_printf(MSG_ERROR, "recv: %s", strerror(errno));
|
|
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->common.sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
|
|
if (drv->common.sock < 0) {
|
|
wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (eloop_register_read_sock(drv->common.sock, handle_read,
|
|
drv->common.ctx, NULL)) {
|
|
wpa_printf(MSG_INFO, "Could not register read socket");
|
|
return -1;
|
|
}
|
|
|
|
os_memset(&ifr, 0, sizeof(ifr));
|
|
os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name));
|
|
if (ioctl(drv->common.sock, SIOCGIFINDEX, &ifr) != 0) {
|
|
wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s",
|
|
strerror(errno));
|
|
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->common.sock, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
|
{
|
|
wpa_printf(MSG_ERROR, "bind: %s", strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/* filter multicast address */
|
|
if (wired_multicast_membership(drv->common.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->common.ifname, sizeof(ifr.ifr_name));
|
|
if (ioctl(drv->common.sock, SIOCGIFHWADDR, &ifr) != 0) {
|
|
wpa_printf(MSG_ERROR, "ioctl(SIOCGIFHWADDR): %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
|
|
wpa_printf(MSG_INFO, "Invalid HW-addr family 0x%04x",
|
|
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) {
|
|
wpa_printf(MSG_ERROR, "socket call failed for dhcp: %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp,
|
|
drv->common.ctx, NULL)) {
|
|
wpa_printf(MSG_INFO, "Could not register read socket");
|
|
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) {
|
|
wpa_printf(MSG_ERROR, "setsockopt[SOL_SOCKET,SO_REUSEADDR]: %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
|
|
sizeof(n)) == -1) {
|
|
wpa_printf(MSG_ERROR, "setsockopt[SOL_SOCKET,SO_BROADCAST]: %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
os_memset(&ifr, 0, sizeof(ifr));
|
|
os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->common.ifname, IFNAMSIZ);
|
|
if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
|
|
(char *) &ifr, sizeof(ifr)) < 0) {
|
|
wpa_printf(MSG_ERROR,
|
|
"setsockopt[SOL_SOCKET,SO_BINDTODEVICE]: %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
|
|
sizeof(struct sockaddr)) == -1) {
|
|
wpa_printf(MSG_ERROR, "bind: %s", strerror(errno));
|
|
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) {
|
|
wpa_printf(MSG_INFO,
|
|
"malloc() failed for wired_send_eapol(len=%lu)",
|
|
(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->common.sock, (u8 *) hdr, len, 0);
|
|
os_free(hdr);
|
|
|
|
if (res < 0) {
|
|
wpa_printf(MSG_ERROR,
|
|
"wired_send_eapol - packet len: %lu - failed: send: %s",
|
|
(unsigned long) len, strerror(errno));
|
|
}
|
|
|
|
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) {
|
|
wpa_printf(MSG_INFO,
|
|
"Could not allocate memory for wired driver data");
|
|
return NULL;
|
|
}
|
|
|
|
drv->common.ctx = hapd;
|
|
os_strlcpy(drv->common.ifname, params->ifname,
|
|
sizeof(drv->common.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->common.sock >= 0) {
|
|
eloop_unregister_read_sock(drv->common.sock);
|
|
close(drv->common.sock);
|
|
}
|
|
|
|
if (drv->dhcp_sock >= 0) {
|
|
eloop_unregister_read_sock(drv->dhcp_sock);
|
|
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 void * wpa_driver_wired_init(void *ctx, const char *ifname)
|
|
{
|
|
struct wpa_driver_wired_data *drv;
|
|
|
|
drv = os_zalloc(sizeof(*drv));
|
|
if (drv == NULL)
|
|
return NULL;
|
|
|
|
if (driver_wired_init_common(&drv->common, ifname, ctx) < 0) {
|
|
os_free(drv);
|
|
return NULL;
|
|
}
|
|
|
|
return drv;
|
|
}
|
|
|
|
|
|
static void wpa_driver_wired_deinit(void *priv)
|
|
{
|
|
struct wpa_driver_wired_data *drv = priv;
|
|
|
|
driver_wired_deinit_common(&drv->common);
|
|
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,
|
|
};
|