1 files changed, 641 insertions, 0 deletions

diff --git a/src/ap/fils_hlp.c b/src/ap/fils_hlp.c
new file mode 100644
index 000000000000..2a359ab03c81
--- /dev/null
+++ b/src/ap/fils_hlp.c
@@ -0,0 +1,641 @@
+/*
+ * FILS HLP request processing
+ * Copyright (c) 2017, 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 "utils/eloop.h"
+#include "common/dhcp.h"
+#include "hostapd.h"
+#include "sta_info.h"
+#include "ieee802_11.h"
+#include "fils_hlp.h"
+
+
+static be16 ip_checksum(const void *buf, size_t len)
+{
+	u32 sum = 0;
+	const u16 *pos;
+
+	for (pos = buf; len >= 2; len -= 2)
+		sum += ntohs(*pos++);
+	if (len)
+		sum += ntohs(*pos << 8);
+
+	sum = (sum >> 16) + (sum & 0xffff);
+	sum += sum >> 16;
+	return htons(~sum);
+}
+
+
+static int fils_dhcp_request(struct hostapd_data *hapd, struct sta_info *sta,
+			     struct dhcp_data *dhcpoffer, u8 *dhcpofferend)
+{
+	u8 *pos, *end;
+	struct dhcp_data *dhcp;
+	struct sockaddr_in addr;
+	ssize_t res;
+	const u8 *server_id = NULL;
+
+	if (!sta->hlp_dhcp_discover) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: No pending HLP DHCPDISCOVER available");
+		return -1;
+	}
+
+	/* Convert to DHCPREQUEST, remove rapid commit option, replace requested
+	 * IP address option with yiaddr. */
+	pos = wpabuf_mhead(sta->hlp_dhcp_discover);
+	end = pos + wpabuf_len(sta->hlp_dhcp_discover);
+	dhcp = (struct dhcp_data *) pos;
+	pos = (u8 *) (dhcp + 1);
+	pos += 4; /* skip magic */
+	while (pos < end && *pos != DHCP_OPT_END) {
+		u8 opt, olen;
+
+		opt = *pos++;
+		if (opt == DHCP_OPT_PAD)
+			continue;
+		if (pos >= end)
+			break;
+		olen = *pos++;
+		if (olen > end - pos)
+			break;
+
+		switch (opt) {
+		case DHCP_OPT_MSG_TYPE:
+			if (olen > 0)
+				*pos = DHCPREQUEST;
+			break;
+		case DHCP_OPT_RAPID_COMMIT:
+		case DHCP_OPT_REQUESTED_IP_ADDRESS:
+		case DHCP_OPT_SERVER_ID:
+			/* Remove option */
+			pos -= 2;
+			os_memmove(pos, pos + 2 + olen, end - pos - 2 - olen);
+			end -= 2 + olen;
+			olen = 0;
+			break;
+		}
+		pos += olen;
+	}
+	if (pos >= end || *pos != DHCP_OPT_END) {
+		wpa_printf(MSG_DEBUG, "FILS: Could not update DHCPDISCOVER");
+		return -1;
+	}
+	sta->hlp_dhcp_discover->used = pos - (u8 *) dhcp;
+
+	/* Copy Server ID option from DHCPOFFER to DHCPREQUEST */
+	pos = (u8 *) (dhcpoffer + 1);
+	end = dhcpofferend;
+	pos += 4; /* skip magic */
+	while (pos < end && *pos != DHCP_OPT_END) {
+		u8 opt, olen;
+
+		opt = *pos++;
+		if (opt == DHCP_OPT_PAD)
+			continue;
+		if (pos >= end)
+			break;
+		olen = *pos++;
+		if (olen > end - pos)
+			break;
+
+		switch (opt) {
+		case DHCP_OPT_SERVER_ID:
+			server_id = pos - 2;
+			break;
+		}
+		pos += olen;
+	}
+
+	if (wpabuf_resize(&sta->hlp_dhcp_discover,
+			  6 + 1 + (server_id ? 2 + server_id[1] : 0)))
+		return -1;
+	if (server_id)
+		wpabuf_put_data(sta->hlp_dhcp_discover, server_id,
+				2 + server_id[1]);
+	wpabuf_put_u8(sta->hlp_dhcp_discover, DHCP_OPT_REQUESTED_IP_ADDRESS);
+	wpabuf_put_u8(sta->hlp_dhcp_discover, 4);
+	wpabuf_put_data(sta->hlp_dhcp_discover, &dhcpoffer->your_ip, 4);
+	wpabuf_put_u8(sta->hlp_dhcp_discover, DHCP_OPT_END);
+
+	os_memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = hapd->conf->dhcp_server.u.v4.s_addr;
+	addr.sin_port = htons(hapd->conf->dhcp_server_port);
+	res = sendto(hapd->dhcp_sock, wpabuf_head(sta->hlp_dhcp_discover),
+		     wpabuf_len(sta->hlp_dhcp_discover), 0,
+		     (const struct sockaddr *) &addr, sizeof(addr));
+	if (res < 0) {
+		wpa_printf(MSG_ERROR, "FILS: DHCP sendto failed: %s",
+			   strerror(errno));
+		return -1;
+	}
+	wpa_printf(MSG_DEBUG,
+		   "FILS: Acting as DHCP rapid commit proxy for %s:%d",
+		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
+	wpabuf_free(sta->hlp_dhcp_discover);
+	sta->hlp_dhcp_discover = NULL;
+	sta->fils_dhcp_rapid_commit_proxy = 1;
+	return 0;
+}
+
+
+static void fils_dhcp_handler(int sd, void *eloop_ctx, void *sock_ctx)
+{
+	struct hostapd_data *hapd = sock_ctx;
+	struct sta_info *sta;
+	u8 buf[1500], *pos, *end, *end_opt = NULL;
+	struct dhcp_data *dhcp;
+	struct sockaddr_in addr;
+	socklen_t addr_len;
+	ssize_t res;
+	u8 msgtype = 0;
+	int rapid_commit = 0;
+	struct iphdr *iph;
+	struct udphdr *udph;
+	struct wpabuf *resp;
+	const u8 *rpos;
+	size_t left, len;
+
+	addr_len = sizeof(addr);
+	res = recvfrom(sd, buf, sizeof(buf), 0,
+		       (struct sockaddr *) &addr, &addr_len);
+	if (res < 0) {
+		wpa_printf(MSG_DEBUG, "FILS: DHCP read failed: %s",
+			   strerror(errno));
+		return;
+	}
+	wpa_printf(MSG_DEBUG, "FILS: DHCP response from server %s:%d (len=%d)",
+		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port), (int) res);
+	wpa_hexdump(MSG_MSGDUMP, "FILS: HLP - DHCP server response", buf, res);
+	if ((size_t) res < sizeof(*dhcp))
+		return;
+	dhcp = (struct dhcp_data *) buf;
+	if (dhcp->op != 2)
+		return; /* Not a BOOTREPLY */
+	if (dhcp->relay_ip != hapd->conf->own_ip_addr.u.v4.s_addr) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: HLP - DHCP response to unknown relay address 0x%x",
+			   dhcp->relay_ip);
+		return;
+	}
+	dhcp->relay_ip = 0;
+	pos = (u8 *) (dhcp + 1);
+	end = &buf[res];
+
+	if (end - pos < 4 || WPA_GET_BE32(pos) != DHCP_MAGIC) {
+		wpa_printf(MSG_DEBUG, "FILS: HLP - no DHCP magic in response");
+		return;
+	}
+	pos += 4;
+
+	wpa_hexdump(MSG_DEBUG, "FILS: HLP - DHCP options in response",
+		    pos, end - pos);
+	while (pos < end && *pos != DHCP_OPT_END) {
+		u8 opt, olen;
+
+		opt = *pos++;
+		if (opt == DHCP_OPT_PAD)
+			continue;
+		if (pos >= end)
+			break;
+		olen = *pos++;
+		if (olen > end - pos)
+			break;
+
+		switch (opt) {
+		case DHCP_OPT_MSG_TYPE:
+			if (olen > 0)
+				msgtype = pos[0];
+			break;
+		case DHCP_OPT_RAPID_COMMIT:
+			rapid_commit = 1;
+			break;
+		}
+		pos += olen;
+	}
+	if (pos < end && *pos == DHCP_OPT_END)
+		end_opt = pos;
+
+	wpa_printf(MSG_DEBUG,
+		   "FILS: HLP - DHCP message type %u (rapid_commit=%d hw_addr="
+		   MACSTR ")",
+		   msgtype, rapid_commit, MAC2STR(dhcp->hw_addr));
+
+	sta = ap_get_sta(hapd, dhcp->hw_addr);
+	if (!sta || !sta->fils_pending_assoc_req) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: No pending HLP DHCP exchange with hw_addr "
+			   MACSTR, MAC2STR(dhcp->hw_addr));
+		return;
+	}
+
+	if (hapd->conf->dhcp_rapid_commit_proxy && msgtype == DHCPOFFER &&
+	    !rapid_commit) {
+		/* Use hostapd to take care of 4-message exchange and convert
+		 * the final DHCPACK to rapid commit version. */
+		if (fils_dhcp_request(hapd, sta, dhcp, end) == 0)
+			return;
+		/* failed, so send the server response as-is */
+	} else if (msgtype != DHCPACK) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: No DHCPACK available from the server and cannot do rapid commit proxying");
+	}
+
+	pos = buf;
+	resp = wpabuf_alloc(2 * ETH_ALEN + 6 + 2 +
+			    sizeof(*iph) + sizeof(*udph) + (end - pos) + 2);
+	if (!resp)
+		return;
+	wpabuf_put_data(resp, sta->addr, ETH_ALEN);
+	wpabuf_put_data(resp, hapd->own_addr, ETH_ALEN);
+	wpabuf_put_data(resp, "\xaa\xaa\x03\x00\x00\x00", 6);
+	wpabuf_put_be16(resp, ETH_P_IP);
+	iph = wpabuf_put(resp, sizeof(*iph));
+	iph->version = 4;
+	iph->ihl = sizeof(*iph) / 4;
+	iph->tot_len = htons(sizeof(*iph) + sizeof(*udph) + (end - pos));
+	iph->ttl = 1;
+	iph->protocol = 17; /* UDP */
+	iph->saddr = hapd->conf->dhcp_server.u.v4.s_addr;
+	iph->daddr = dhcp->client_ip;
+	iph->check = ip_checksum(iph, sizeof(*iph));
+	udph = wpabuf_put(resp, sizeof(*udph));
+	udph->uh_sport = htons(DHCP_SERVER_PORT);
+	udph->uh_dport = htons(DHCP_CLIENT_PORT);
+	udph->uh_ulen = htons(sizeof(*udph) + (end - pos));
+	udph->uh_sum = htons(0x0000); /* TODO: calculate checksum */
+	if (hapd->conf->dhcp_rapid_commit_proxy && msgtype == DHCPACK &&
+	    !rapid_commit && sta->fils_dhcp_rapid_commit_proxy && end_opt) {
+		/* Add rapid commit option */
+		wpabuf_put_data(resp, pos, end_opt - pos);
+		wpabuf_put_u8(resp, DHCP_OPT_RAPID_COMMIT);
+		wpabuf_put_u8(resp, 0);
+		wpabuf_put_data(resp, end_opt, end - end_opt);
+	} else {
+		wpabuf_put_data(resp, pos, end - pos);
+	}
+	if (wpabuf_resize(&sta->fils_hlp_resp, wpabuf_len(resp) +
+			  2 * wpabuf_len(resp) / 255 + 100)) {
+		wpabuf_free(resp);
+		return;
+	}
+
+	rpos = wpabuf_head(resp);
+	left = wpabuf_len(resp);
+
+	wpabuf_put_u8(sta->fils_hlp_resp, WLAN_EID_EXTENSION); /* Element ID */
+	if (left <= 254)
+		len = 1 + left;
+	else
+		len = 255;
+	wpabuf_put_u8(sta->fils_hlp_resp, len); /* Length */
+	/* Element ID Extension */
+	wpabuf_put_u8(sta->fils_hlp_resp, WLAN_EID_EXT_FILS_HLP_CONTAINER);
+	/* Destination MAC Address, Source MAC Address, HLP Packet.
+	 * HLP Packet is in MSDU format (i.e., including the LLC/SNAP header
+	 * when LPD is used). */
+	wpabuf_put_data(sta->fils_hlp_resp, rpos, len - 1);
+	rpos += len - 1;
+	left -= len - 1;
+	while (left) {
+		wpabuf_put_u8(sta->fils_hlp_resp, WLAN_EID_FRAGMENT);
+		len = left > 255 ? 255 : left;
+		wpabuf_put_u8(sta->fils_hlp_resp, len);
+		wpabuf_put_data(sta->fils_hlp_resp, rpos, len);
+		rpos += len;
+		left -= len;
+	}
+	wpabuf_free(resp);
+
+	if (sta->fils_drv_assoc_finish)
+		hostapd_notify_assoc_fils_finish(hapd, sta);
+	else
+		fils_hlp_finish_assoc(hapd, sta);
+}
+
+
+static int fils_process_hlp_dhcp(struct hostapd_data *hapd,
+				 struct sta_info *sta,
+				 const u8 *msg, size_t len)
+{
+	const struct dhcp_data *dhcp;
+	struct wpabuf *dhcp_buf;
+	struct dhcp_data *dhcp_msg;
+	u8 msgtype = 0;
+	int rapid_commit = 0;
+	const u8 *pos = msg, *end;
+	struct sockaddr_in addr;
+	ssize_t res;
+
+	if (len < sizeof(*dhcp))
+		return 0;
+	dhcp = (const struct dhcp_data *) pos;
+	end = pos + len;
+	wpa_printf(MSG_DEBUG,
+		   "FILS: HLP request DHCP: op=%u htype=%u hlen=%u hops=%u xid=0x%x",
+		   dhcp->op, dhcp->htype, dhcp->hlen, dhcp->hops,
+		   ntohl(dhcp->xid));
+	pos += sizeof(*dhcp);
+	if (dhcp->op != 1)
+		return 0; /* Not a BOOTREQUEST */
+
+	if (end - pos < 4)
+		return 0;
+	if (WPA_GET_BE32(pos) != DHCP_MAGIC) {
+		wpa_printf(MSG_DEBUG, "FILS: HLP - no DHCP magic");
+		return 0;
+	}
+	pos += 4;
+
+	wpa_hexdump(MSG_DEBUG, "FILS: HLP - DHCP options", pos, end - pos);
+	while (pos < end && *pos != DHCP_OPT_END) {
+		u8 opt, olen;
+
+		opt = *pos++;
+		if (opt == DHCP_OPT_PAD)
+			continue;
+		if (pos >= end)
+			break;
+		olen = *pos++;
+		if (olen > end - pos)
+			break;
+
+		switch (opt) {
+		case DHCP_OPT_MSG_TYPE:
+			if (olen > 0)
+				msgtype = pos[0];
+			break;
+		case DHCP_OPT_RAPID_COMMIT:
+			rapid_commit = 1;
+			break;
+		}
+		pos += olen;
+	}
+
+	wpa_printf(MSG_DEBUG, "FILS: HLP - DHCP message type %u", msgtype);
+	if (msgtype != DHCPDISCOVER)
+		return 0;
+
+	if (hapd->conf->dhcp_server.af != AF_INET ||
+	    hapd->conf->dhcp_server.u.v4.s_addr == 0) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: HLP - no DHCPv4 server configured - drop request");
+		return 0;
+	}
+
+	if (hapd->conf->own_ip_addr.af != AF_INET ||
+	    hapd->conf->own_ip_addr.u.v4.s_addr == 0) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: HLP - no IPv4 own_ip_addr configured - drop request");
+		return 0;
+	}
+
+	if (hapd->dhcp_sock < 0) {
+		int s;
+
+		s = socket(AF_INET, SOCK_DGRAM, 0);
+		if (s < 0) {
+			wpa_printf(MSG_ERROR,
+				   "FILS: Failed to open DHCP socket: %s",
+				   strerror(errno));
+			return 0;
+		}
+
+		if (hapd->conf->dhcp_relay_port) {
+			os_memset(&addr, 0, sizeof(addr));
+			addr.sin_family = AF_INET;
+			addr.sin_addr.s_addr =
+				hapd->conf->own_ip_addr.u.v4.s_addr;
+			addr.sin_port = htons(hapd->conf->dhcp_relay_port);
+			if (bind(s, (struct sockaddr *) &addr, sizeof(addr))) {
+				wpa_printf(MSG_ERROR,
+					   "FILS: Failed to bind DHCP socket: %s",
+					   strerror(errno));
+				close(s);
+				return 0;
+			}
+		}
+		if (eloop_register_sock(s, EVENT_TYPE_READ,
+					fils_dhcp_handler, NULL, hapd)) {
+			close(s);
+			return 0;
+		}
+
+		hapd->dhcp_sock = s;
+	}
+
+	dhcp_buf = wpabuf_alloc(len);
+	if (!dhcp_buf)
+		return 0;
+	dhcp_msg = wpabuf_put(dhcp_buf, len);
+	os_memcpy(dhcp_msg, msg, len);
+	dhcp_msg->relay_ip = hapd->conf->own_ip_addr.u.v4.s_addr;
+	os_memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = hapd->conf->dhcp_server.u.v4.s_addr;
+	addr.sin_port = htons(hapd->conf->dhcp_server_port);
+	res = sendto(hapd->dhcp_sock, dhcp_msg, len, 0,
+		     (const struct sockaddr *) &addr, sizeof(addr));
+	if (res < 0) {
+		wpa_printf(MSG_ERROR, "FILS: DHCP sendto failed: %s",
+			   strerror(errno));
+		wpabuf_free(dhcp_buf);
+		/* Close the socket to try to recover from error */
+		eloop_unregister_read_sock(hapd->dhcp_sock);
+		close(hapd->dhcp_sock);
+		hapd->dhcp_sock = -1;
+		return 0;
+	}
+
+	wpa_printf(MSG_DEBUG,
+		   "FILS: HLP relayed DHCP request to server %s:%d (rapid_commit=%d)",
+		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port),
+		   rapid_commit);
+	if (hapd->conf->dhcp_rapid_commit_proxy && rapid_commit) {
+		/* Store a copy of the DHCPDISCOVER for rapid commit proxying
+		 * purposes if the server does not support the rapid commit
+		 * option. */
+		wpa_printf(MSG_DEBUG,
+			   "FILS: Store DHCPDISCOVER for rapid commit proxy");
+		wpabuf_free(sta->hlp_dhcp_discover);
+		sta->hlp_dhcp_discover = dhcp_buf;
+	} else {
+		wpabuf_free(dhcp_buf);
+	}
+
+	return 1;
+}
+
+
+static int fils_process_hlp_udp(struct hostapd_data *hapd,
+				struct sta_info *sta, const u8 *dst,
+				const u8 *pos, size_t len)
+{
+	const struct iphdr *iph;
+	const struct udphdr *udph;
+	u16 sport, dport, ulen;
+
+	if (len < sizeof(*iph) + sizeof(*udph))
+		return 0;
+	iph = (const struct iphdr *) pos;
+	udph = (const struct udphdr *) (iph + 1);
+	sport = ntohs(udph->uh_sport);
+	dport = ntohs(udph->uh_dport);
+	ulen = ntohs(udph->uh_ulen);
+	wpa_printf(MSG_DEBUG,
+		   "FILS: HLP request UDP: sport=%u dport=%u ulen=%u sum=0x%x",
+		   sport, dport, ulen, ntohs(udph->uh_sum));
+	/* TODO: Check UDP checksum */
+	if (ulen < sizeof(*udph) || ulen > len - sizeof(*iph))
+		return 0;
+
+	if (dport == DHCP_SERVER_PORT && sport == DHCP_CLIENT_PORT) {
+		return fils_process_hlp_dhcp(hapd, sta, (const u8 *) (udph + 1),
+					     ulen - sizeof(*udph));
+	}
+
+	return 0;
+}
+
+
+static int fils_process_hlp_ip(struct hostapd_data *hapd,
+			       struct sta_info *sta, const u8 *dst,
+			       const u8 *pos, size_t len)
+{
+	const struct iphdr *iph;
+	u16 tot_len;
+
+	if (len < sizeof(*iph))
+		return 0;
+	iph = (const struct iphdr *) pos;
+	if (ip_checksum(iph, sizeof(*iph)) != 0) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: HLP request IPv4 packet had invalid header checksum - dropped");
+		return 0;
+	}
+	tot_len = ntohs(iph->tot_len);
+	if (tot_len > len)
+		return 0;
+	wpa_printf(MSG_DEBUG,
+		   "FILS: HLP request IPv4: saddr=%08x daddr=%08x protocol=%u",
+		   iph->saddr, iph->daddr, iph->protocol);
+	switch (iph->protocol) {
+	case 17:
+		return fils_process_hlp_udp(hapd, sta, dst, pos, len);
+	}
+
+	return 0;
+}
+
+
+static int fils_process_hlp_req(struct hostapd_data *hapd,
+				struct sta_info *sta,
+				const u8 *pos, size_t len)
+{
+	const u8 *pkt, *end;
+
+	wpa_printf(MSG_DEBUG, "FILS: HLP request from " MACSTR " (dst=" MACSTR
+		   " src=" MACSTR " len=%u)",
+		   MAC2STR(sta->addr), MAC2STR(pos), MAC2STR(pos + ETH_ALEN),
+		   (unsigned int) len);
+	if (os_memcmp(sta->addr, pos + ETH_ALEN, ETH_ALEN) != 0) {
+		wpa_printf(MSG_DEBUG,
+			   "FILS: Ignore HLP request with unexpected source address"
+			   MACSTR, MAC2STR(pos + ETH_ALEN));
+		return 0;
+	}
+
+	end = pos + len;
+	pkt = pos + 2 * ETH_ALEN;
+	if (end - pkt >= 6 &&
+	    os_memcmp(pkt, "\xaa\xaa\x03\x00\x00\x00", 6) == 0)
+		pkt += 6; /* Remove SNAP/LLC header */
+	wpa_hexdump(MSG_MSGDUMP, "FILS: HLP request packet", pkt, end - pkt);
+
+	if (end - pkt < 2)
+		return 0;
+
+	switch (WPA_GET_BE16(pkt)) {
+	case ETH_P_IP:
+		return fils_process_hlp_ip(hapd, sta, pos, pkt + 2,
+					   end - pkt - 2);
+	}
+
+	return 0;
+}
+
+
+int fils_process_hlp(struct hostapd_data *hapd, struct sta_info *sta,
+		     const u8 *pos, int left)
+{
+	const u8 *end = pos + left;
+	u8 *tmp, *tmp_pos;
+	int ret = 0;
+
+	/* Old DHCPDISCOVER is not needed anymore, if it was still pending */
+	wpabuf_free(sta->hlp_dhcp_discover);
+	sta->hlp_dhcp_discover = NULL;
+	sta->fils_dhcp_rapid_commit_proxy = 0;
+
+	/* Check if there are any FILS HLP Container elements */
+	while (end - pos >= 2) {
+		if (2 + pos[1] > end - pos)
+			return 0;
+		if (pos[0] == WLAN_EID_EXTENSION &&
+		    pos[1] >= 1 + 2 * ETH_ALEN &&
+		    pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER)
+			break;
+		pos += 2 + pos[1];
+	}
+	if (end - pos < 2)
+		return 0; /* No FILS HLP Container elements */
+
+	tmp = os_malloc(end - pos);
+	if (!tmp)
+		return 0;
+
+	while (end - pos >= 2) {
+		if (2 + pos[1] > end - pos ||
+		    pos[0] != WLAN_EID_EXTENSION ||
+		    pos[1] < 1 + 2 * ETH_ALEN ||
+		    pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER)
+			break;
+		tmp_pos = tmp;
+		os_memcpy(tmp_pos, pos + 3, pos[1] - 1);
+		tmp_pos += pos[1] - 1;
+		pos += 2 + pos[1];
+
+		/* Add possible fragments */
+		while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT &&
+		       2 + pos[1] <= end - pos) {
+			os_memcpy(tmp_pos, pos + 2, pos[1]);
+			tmp_pos += pos[1];
+			pos += 2 + pos[1];
+		}
+
+		if (fils_process_hlp_req(hapd, sta, tmp, tmp_pos - tmp) > 0)
+			ret = 1;
+	}
+
+	os_free(tmp);
+
+	return ret;
+}
+
+
+void fils_hlp_deinit(struct hostapd_data *hapd)
+{
+	if (hapd->dhcp_sock >= 0) {
+		eloop_unregister_read_sock(hapd->dhcp_sock);
+		close(hapd->dhcp_sock);
+		hapd->dhcp_sock = -1;
+	}
+}