92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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/*
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* Generic Snooping for Proxy ARP
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* Copyright (c) 2014, Qualcomm Atheros, Inc.
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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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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "hostapd.h"
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#include "ap_drv_ops.h"
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#include "x_snoop.h"
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int x_snoop_init(struct hostapd_data *hapd)
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{
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struct hostapd_bss_config *conf = hapd->conf;
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if (!conf->isolate) {
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wpa_printf(MSG_DEBUG,
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"x_snoop: ap_isolate must be enabled for x_snoop");
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return -1;
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}
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if (conf->bridge[0] == '\0') {
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wpa_printf(MSG_DEBUG,
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"x_snoop: Bridge must be configured for x_snoop");
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return -1;
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}
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if (hostapd_drv_br_port_set_attr(hapd, DRV_BR_PORT_ATTR_HAIRPIN_MODE,
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1)) {
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wpa_printf(MSG_DEBUG,
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"x_snoop: Failed to enable hairpin_mode on the bridge port");
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return -1;
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}
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if (hostapd_drv_br_port_set_attr(hapd, DRV_BR_PORT_ATTR_PROXYARP, 1)) {
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wpa_printf(MSG_DEBUG,
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"x_snoop: Failed to enable proxyarp on the bridge port");
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return -1;
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}
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if (hostapd_drv_br_set_net_param(hapd, DRV_BR_NET_PARAM_GARP_ACCEPT,
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1)) {
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wpa_printf(MSG_DEBUG,
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"x_snoop: Failed to enable accepting gratuitous ARP on the bridge");
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return -1;
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}
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return 0;
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}
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struct l2_packet_data *
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x_snoop_get_l2_packet(struct hostapd_data *hapd,
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void (*handler)(void *ctx, const u8 *src_addr,
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const u8 *buf, size_t len),
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enum l2_packet_filter_type type)
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{
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struct hostapd_bss_config *conf = hapd->conf;
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struct l2_packet_data *l2;
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l2 = l2_packet_init(conf->bridge, NULL, ETH_P_ALL, handler, hapd, 1);
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if (l2 == NULL) {
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wpa_printf(MSG_DEBUG,
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"x_snoop: Failed to initialize L2 packet processing %s",
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strerror(errno));
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return NULL;
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}
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if (l2_packet_set_packet_filter(l2, type)) {
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wpa_printf(MSG_DEBUG,
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"x_snoop: Failed to set L2 packet filter for type: %d",
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type);
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l2_packet_deinit(l2);
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return NULL;
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}
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return l2;
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}
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void x_snoop_deinit(struct hostapd_data *hapd)
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{
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hostapd_drv_br_set_net_param(hapd, DRV_BR_NET_PARAM_GARP_ACCEPT, 0);
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hostapd_drv_br_port_set_attr(hapd, DRV_BR_PORT_ATTR_PROXYARP, 0);
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hostapd_drv_br_port_set_attr(hapd, DRV_BR_PORT_ATTR_HAIRPIN_MODE, 0);
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}
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