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Current Path: /usr/src/contrib/wpa/src/ap

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📄 accounting.c(14.53 KB)
📄 accounting.h(1.12 KB)
📄 acs.c(29.71 KB)
📄 acs.h(764 B)
📄 airtime_policy.c(6.82 KB)
📄 airtime_policy.h(1.27 KB)
📄 ap_config.c(33.39 KB)
📄 ap_config.h(26.53 KB)
📄 ap_drv_ops.c(25.84 KB)
📄 ap_drv_ops.h(13.38 KB)
📄 ap_list.c(6.82 KB)
📄 ap_list.h(1.5 KB)
📄 ap_mlme.c(5.64 KB)
📄 ap_mlme.h(1007 B)
📄 authsrv.c(8.72 KB)
📄 authsrv.h(352 B)
📄 beacon.c(40.32 KB)
📄 beacon.h(1.25 KB)
📄 bss_load.c(2.4 KB)
📄 bss_load.h(376 B)
📄 ctrl_iface_ap.c(24.3 KB)
📄 ctrl_iface_ap.h(1.61 KB)
📄 dfs.c(29.35 KB)
📄 dfs.h(1.22 KB)
📄 dhcp_snoop.c(3.36 KB)
📄 dhcp_snoop.h(590 B)
📄 dpp_hostapd.c(48.28 KB)
📄 dpp_hostapd.h(1.74 KB)
📄 drv_callbacks.c(51.68 KB)
📄 eap_user_db.c(7.92 KB)
📄 eth_p_oui.c(4.44 KB)
📄 eth_p_oui.h(958 B)
📄 fils_hlp.c(16.82 KB)
📄 fils_hlp.h(547 B)
📄 gas_query_ap.c(19.53 KB)
📄 gas_query_ap.h(1.24 KB)
📄 gas_serv.c(50.48 KB)
📄 gas_serv.h(3.38 KB)
📄 hostapd.c(89.58 KB)
📄 hostapd.h(17.99 KB)
📄 hs20.c(6.27 KB)
📄 hs20.h(843 B)
📄 hw_features.c(24.77 KB)
📄 hw_features.h(1.93 KB)
📄 iapp.c(14.59 KB)
📄 iapp.h(833 B)
📄 ieee802_11.c(148.71 KB)
📄 ieee802_11.h(7.97 KB)
📄 ieee802_11_auth.c(18.3 KB)
📄 ieee802_11_auth.h(1.04 KB)
📄 ieee802_11_he.c(8.77 KB)
📄 ieee802_11_ht.c(16.22 KB)
📄 ieee802_11_shared.c(23.95 KB)
📄 ieee802_11_vht.c(13.4 KB)
📄 ieee802_1x.c(83.16 KB)
📄 ieee802_1x.h(2.84 KB)
📄 mbo_ap.c(5.22 KB)
📄 mbo_ap.h(1.16 KB)
📄 ndisc_snoop.c(4.3 KB)
📄 ndisc_snoop.h(838 B)
📄 neighbor_db.c(6.49 KB)
📄 neighbor_db.h(940 B)
📄 p2p_hostapd.c(2.57 KB)
📄 p2p_hostapd.h(888 B)
📄 pmksa_cache_auth.c(18.79 KB)
📄 pmksa_cache_auth.h(2.69 KB)
📄 preauth_auth.c(6.47 KB)
📄 preauth_auth.h(1.26 KB)
📄 rrm.c(17.27 KB)
📄 rrm.h(1.21 KB)
📄 sta_info.c(41.42 KB)
📄 sta_info.h(11.63 KB)
📄 taxonomy.c(7.45 KB)
📄 taxonomy.h(766 B)
📄 tkip_countermeasures.c(2.95 KB)
📄 tkip_countermeasures.h(451 B)
📄 utils.c(2.29 KB)
📄 vlan.c(756 B)
📄 vlan.h(727 B)
📄 vlan_full.c(18.35 KB)
📄 vlan_ifconfig.c(1.47 KB)
📄 vlan_init.c(5.88 KB)
📄 vlan_init.h(1.09 KB)
📄 vlan_ioctl.c(3.75 KB)
📄 vlan_util.c(3.9 KB)
📄 vlan_util.h(980 B)
📄 wmm.c(11.47 KB)
📄 wmm.h(653 B)
📄 wnm_ap.c(23.69 KB)
📄 wnm_ap.h(1.08 KB)
📄 wpa_auth.c(140.03 KB)
📄 wpa_auth.h(17.89 KB)
📄 wpa_auth_ft.c(120.89 KB)
📄 wpa_auth_glue.c(35.42 KB)
📄 wpa_auth_glue.h(443 B)
📄 wpa_auth_i.h(8.47 KB)
📄 wpa_auth_ie.c(32.38 KB)
📄 wpa_auth_ie.h(1.14 KB)
📄 wpa_auth_kay.c(12.26 KB)
📄 wpa_auth_kay.h(1.15 KB)
📄 wps_hostapd.c(54.66 KB)
📄 wps_hostapd.h(2.79 KB)
📄 x_snoop.c(3.21 KB)
📄 x_snoop.h(1.29 KB)

Editing: dhcp_snoop.c

/*
 * DHCP snooping for Proxy ARP
 * Copyright (c) 2014, Qualcomm Atheros, Inc.
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "utils/includes.h"

#include "utils/common.h"
#include "common/dhcp.h"
#include "l2_packet/l2_packet.h"
#include "hostapd.h"
#include "sta_info.h"
#include "ap_drv_ops.h"
#include "x_snoop.h"
#include "dhcp_snoop.h"

static const char * ipaddr_str(u32 addr)
{
	static char buf[17];

os_snprintf(buf, sizeof(buf), "%u.%u.%u.%u",
		    (addr >> 24) & 0xff, (addr >> 16) & 0xff,
		    (addr >> 8) & 0xff, addr & 0xff);
	return buf;
}

static void handle_dhcp(void *ctx, const u8 *src_addr, const u8 *buf,
			size_t len)
{
	struct hostapd_data *hapd = ctx;
	const struct bootp_pkt *b;
	struct sta_info *sta;
	int exten_len;
	const u8 *end, *pos;
	int res, msgtype = 0, prefixlen = 32;
	u32 subnet_mask = 0;
	u16 tot_len;

exten_len = len - ETH_HLEN - (sizeof(*b) - sizeof(b->exten));
	if (exten_len < 4)
		return;

b = (const struct bootp_pkt *) &buf[ETH_HLEN];
	tot_len = ntohs(b->iph.tot_len);
	if (tot_len > (unsigned int) (len - ETH_HLEN))
		return;

if (WPA_GET_BE32(b->exten) != DHCP_MAGIC)
		return;

/* Parse DHCP options */
	end = (const u8 *) b + tot_len;
	pos = &b->exten[4];
	while (pos < end && *pos != DHCP_OPT_END) {
		const u8 *opt = pos++;

if (*opt == DHCP_OPT_PAD)
			continue;

if (pos >= end || 1 + *pos > end - pos)
			break;
		pos += *pos + 1;
		if (pos >= end)
			break;

switch (*opt) {
		case DHCP_OPT_SUBNET_MASK:
			if (opt[1] == 4)
				subnet_mask = WPA_GET_BE32(&opt[2]);
			if (subnet_mask == 0)
				return;
			while (!(subnet_mask & 0x1)) {
				subnet_mask >>= 1;
				prefixlen--;
			}
			break;
		case DHCP_OPT_MSG_TYPE:
			if (opt[1])
				msgtype = opt[2];
			break;
		default:
			break;
		}
	}

if (hapd->conf->disable_dgaf && is_broadcast_ether_addr(buf)) {
		for (sta = hapd->sta_list; sta; sta = sta->next) {
			if (!(sta->flags & WLAN_STA_AUTHORIZED))
				continue;
			x_snoop_mcast_to_ucast_convert_send(hapd, sta,
							    (u8 *) buf, len);
		}
	}

if (msgtype == DHCPACK) {
		if (b->your_ip == 0)
			return;

/* DHCPACK for DHCPREQUEST */
		sta = ap_get_sta(hapd, b->hw_addr);
		if (!sta)
			return;

wpa_printf(MSG_DEBUG, "dhcp_snoop: Found DHCPACK for " MACSTR
			   " @ IPv4 address %s/%d",
			   MAC2STR(sta->addr),
			   ipaddr_str(be_to_host32(b->your_ip)),
			   prefixlen);

if (sta->ipaddr == b->your_ip)
			return;

if (sta->ipaddr != 0) {
			wpa_printf(MSG_DEBUG,
				   "dhcp_snoop: Removing IPv4 address %s from the ip neigh table",
				   ipaddr_str(be_to_host32(sta->ipaddr)));
			hostapd_drv_br_delete_ip_neigh(hapd, 4,
						       (u8 *) &sta->ipaddr);
		}

res = hostapd_drv_br_add_ip_neigh(hapd, 4, (u8 *) &b->your_ip,
						  prefixlen, sta->addr);
		if (res) {
			wpa_printf(MSG_DEBUG,
				   "dhcp_snoop: Adding ip neigh table failed: %d",
				   res);
			return;
		}
		sta->ipaddr = b->your_ip;
	}
}

int dhcp_snoop_init(struct hostapd_data *hapd)
{
	hapd->sock_dhcp = x_snoop_get_l2_packet(hapd, handle_dhcp,
						L2_PACKET_FILTER_DHCP);
	if (hapd->sock_dhcp == NULL) {
		wpa_printf(MSG_DEBUG,
			   "dhcp_snoop: Failed to initialize L2 packet processing for DHCP packet: %s",
			   strerror(errno));
		return -1;
	}

return 0;
}

void dhcp_snoop_deinit(struct hostapd_data *hapd)
{
	l2_packet_deinit(hapd->sock_dhcp);
	hapd->sock_dhcp = NULL;
}

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Editing: dhcp_snoop.c

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