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https://github.com/vanhoefm/fragattacks.git
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macsec_linux: Hook QCA driver wrapper for hostapd MACsec
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen
parent
524dc5bf10
commit
b09670abfb
@ -1,6 +1,7 @@
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/*
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* Driver interaction with Linux MACsec kernel module
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* Copyright (c) 2016, Sabrina Dubroca <sd@queasysnail.net> and Red Hat, Inc.
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* Copyright (c) 2019, The Linux Foundation
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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@ -22,6 +23,7 @@
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "common/eapol_common.h"
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#include "pae/ieee802_1x_kay.h"
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#include "driver.h"
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#include "driver_wired_common.h"
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@ -57,6 +59,7 @@ struct macsec_drv_data {
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char ifname[IFNAMSIZ + 1];
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int ifi;
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int parent_ifi;
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int use_pae_group_addr;
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Boolean created_link;
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@ -1399,6 +1402,214 @@ static int macsec_drv_status(void *priv, char *buf, size_t buflen)
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}
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#ifdef __linux__
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static void macsec_drv_handle_data(void *ctx, unsigned char *buf, size_t len)
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{
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#ifdef HOSTAPD
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struct ieee8023_hdr *hdr;
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u8 *pos, *sa;
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size_t left;
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union wpa_event_data event;
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/* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
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* 2 byte ethertype */
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if (len < 14) {
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wpa_printf(MSG_MSGDUMP, "%s: too short (%lu)",
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__func__, (unsigned long) len);
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return;
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}
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hdr = (struct ieee8023_hdr *) buf;
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switch (ntohs(hdr->ethertype)) {
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case ETH_P_PAE:
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wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
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sa = hdr->src;
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os_memset(&event, 0, sizeof(event));
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event.new_sta.addr = sa;
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wpa_supplicant_event(ctx, EVENT_NEW_STA, &event);
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pos = (u8 *) (hdr + 1);
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left = len - sizeof(*hdr);
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drv_event_eapol_rx(ctx, sa, pos, left);
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break;
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default:
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wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
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ntohs(hdr->ethertype));
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break;
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}
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#endif /* HOSTAPD */
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}
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static void macsec_drv_handle_read(int sock, void *eloop_ctx, void *sock_ctx)
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{
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int len;
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unsigned char buf[3000];
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len = recv(sock, buf, sizeof(buf), 0);
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if (len < 0) {
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wpa_printf(MSG_ERROR, "macsec_linux: recv: %s",
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strerror(errno));
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return;
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}
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macsec_drv_handle_data(eloop_ctx, buf, len);
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}
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#endif /* __linux__ */
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static int macsec_drv_init_sockets(struct macsec_drv_data *drv, u8 *own_addr)
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{
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#ifdef __linux__
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struct ifreq ifr;
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struct sockaddr_ll addr;
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drv->common.sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
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if (drv->common.sock < 0) {
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wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s",
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strerror(errno));
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return -1;
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}
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if (eloop_register_read_sock(drv->common.sock, macsec_drv_handle_read,
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drv->common.ctx, NULL)) {
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wpa_printf(MSG_INFO, "Could not register read socket");
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return -1;
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}
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os_memset(&ifr, 0, sizeof(ifr));
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os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name));
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if (ioctl(drv->common.sock, SIOCGIFINDEX, &ifr) != 0) {
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wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s",
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strerror(errno));
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return -1;
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}
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os_memset(&addr, 0, sizeof(addr));
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addr.sll_family = AF_PACKET;
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addr.sll_ifindex = ifr.ifr_ifindex;
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wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
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addr.sll_ifindex);
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if (bind(drv->common.sock, (struct sockaddr *) &addr, sizeof(addr)) < 0)
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{
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wpa_printf(MSG_ERROR, "bind: %s", strerror(errno));
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return -1;
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}
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/* filter multicast address */
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if (wired_multicast_membership(drv->common.sock, ifr.ifr_ifindex,
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pae_group_addr, 1) < 0) {
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wpa_printf(MSG_ERROR, "wired: Failed to add multicast group "
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"membership");
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return -1;
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}
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os_memset(&ifr, 0, sizeof(ifr));
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os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name));
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if (ioctl(drv->common.sock, SIOCGIFHWADDR, &ifr) != 0) {
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wpa_printf(MSG_ERROR, "ioctl(SIOCGIFHWADDR): %s",
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strerror(errno));
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return -1;
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}
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if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
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wpa_printf(MSG_INFO, "Invalid HW-addr family 0x%04x",
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ifr.ifr_hwaddr.sa_family);
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return -1;
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}
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os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
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return 0;
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#else /* __linux__ */
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return -1;
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#endif /* __linux__ */
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}
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static void * macsec_drv_hapd_init(struct hostapd_data *hapd,
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struct wpa_init_params *params)
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{
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struct macsec_drv_data *drv;
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drv = os_zalloc(sizeof(struct macsec_drv_data));
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if (drv == NULL) {
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wpa_printf(MSG_INFO,
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"Could not allocate memory for wired driver data");
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return NULL;
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}
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drv->common.ctx = hapd;
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os_strlcpy(drv->common.ifname, params->ifname,
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sizeof(drv->common.ifname));
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drv->use_pae_group_addr = params->use_pae_group_addr;
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if (macsec_drv_init_sockets(drv, params->own_addr)) {
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os_free(drv);
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return NULL;
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}
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return drv;
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}
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static void macsec_drv_hapd_deinit(void *priv)
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{
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struct macsec_drv_data *drv = priv;
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if (drv->common.sock >= 0) {
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eloop_unregister_read_sock(drv->common.sock);
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close(drv->common.sock);
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}
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os_free(drv);
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}
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static int macsec_drv_send_eapol(void *priv, const u8 *addr,
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const u8 *data, size_t data_len, int encrypt,
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const u8 *own_addr, u32 flags)
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{
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struct macsec_drv_data *drv = priv;
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struct ieee8023_hdr *hdr;
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size_t len;
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u8 *pos;
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int res;
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len = sizeof(*hdr) + data_len;
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hdr = os_zalloc(len);
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if (hdr == NULL) {
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wpa_printf(MSG_INFO,
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"%s: malloc() failed (len=%lu)",
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__func__, (unsigned long) len);
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return -1;
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}
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os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
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ETH_ALEN);
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os_memcpy(hdr->src, own_addr, ETH_ALEN);
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hdr->ethertype = htons(ETH_P_PAE);
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pos = (u8 *) (hdr + 1);
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os_memcpy(pos, data, data_len);
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res = send(drv->common.sock, (u8 *) hdr, len, 0);
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os_free(hdr);
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if (res < 0) {
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wpa_printf(MSG_ERROR,
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"%s: packet len: %lu - failed: send: %s",
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__func__, (unsigned long) len, strerror(errno));
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}
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return res;
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}
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const struct wpa_driver_ops wpa_driver_macsec_linux_ops = {
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.name = "macsec_linux",
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.desc = "MACsec Ethernet driver for Linux",
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@ -1407,6 +1618,9 @@ const struct wpa_driver_ops wpa_driver_macsec_linux_ops = {
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.get_capa = driver_wired_get_capa,
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.init = macsec_drv_wpa_init,
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.deinit = macsec_drv_wpa_deinit,
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.hapd_init = macsec_drv_hapd_init,
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.hapd_deinit = macsec_drv_hapd_deinit,
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.hapd_send_eapol = macsec_drv_send_eapol,
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.macsec_init = macsec_drv_macsec_init,
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.macsec_deinit = macsec_drv_macsec_deinit,
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