1/*
2 * FILS HLP request processing
3 * Copyright (c) 2017, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "utils/includes.h"
10
11#include "utils/common.h"
12#include "utils/eloop.h"
13#include "common/dhcp.h"
14#include "hostapd.h"
15#include "sta_info.h"
16#include "ieee802_11.h"
17#include "fils_hlp.h"
18
19
20static be16 ip_checksum(const void *buf, size_t len)
21{
22	u32 sum = 0;
23	const u16 *pos;
24
25	for (pos = buf; len >= 2; len -= 2)
26		sum += ntohs(*pos++);
27	if (len)
28		sum += ntohs(*pos << 8);
29
30	sum = (sum >> 16) + (sum & 0xffff);
31	sum += sum >> 16;
32	return htons(~sum);
33}
34
35
36static int fils_dhcp_request(struct hostapd_data *hapd, struct sta_info *sta,
37			     struct dhcp_data *dhcpoffer, u8 *dhcpofferend)
38{
39	u8 *pos, *end;
40	struct dhcp_data *dhcp;
41	struct sockaddr_in addr;
42	ssize_t res;
43	const u8 *server_id = NULL;
44
45	if (!sta->hlp_dhcp_discover) {
46		wpa_printf(MSG_DEBUG,
47			   "FILS: No pending HLP DHCPDISCOVER available");
48		return -1;
49	}
50
51	/* Convert to DHCPREQUEST, remove rapid commit option, replace requested
52	 * IP address option with yiaddr. */
53	pos = wpabuf_mhead(sta->hlp_dhcp_discover);
54	end = pos + wpabuf_len(sta->hlp_dhcp_discover);
55	dhcp = (struct dhcp_data *) pos;
56	pos = (u8 *) (dhcp + 1);
57	pos += 4; /* skip magic */
58	while (pos < end && *pos != DHCP_OPT_END) {
59		u8 opt, olen;
60
61		opt = *pos++;
62		if (opt == DHCP_OPT_PAD)
63			continue;
64		if (pos >= end)
65			break;
66		olen = *pos++;
67		if (olen > end - pos)
68			break;
69
70		switch (opt) {
71		case DHCP_OPT_MSG_TYPE:
72			if (olen > 0)
73				*pos = DHCPREQUEST;
74			break;
75		case DHCP_OPT_RAPID_COMMIT:
76		case DHCP_OPT_REQUESTED_IP_ADDRESS:
77		case DHCP_OPT_SERVER_ID:
78			/* Remove option */
79			pos -= 2;
80			os_memmove(pos, pos + 2 + olen, end - pos - 2 - olen);
81			end -= 2 + olen;
82			olen = 0;
83			break;
84		}
85		pos += olen;
86	}
87	if (pos >= end || *pos != DHCP_OPT_END) {
88		wpa_printf(MSG_DEBUG, "FILS: Could not update DHCPDISCOVER");
89		return -1;
90	}
91	sta->hlp_dhcp_discover->used = pos - (u8 *) dhcp;
92
93	/* Copy Server ID option from DHCPOFFER to DHCPREQUEST */
94	pos = (u8 *) (dhcpoffer + 1);
95	end = dhcpofferend;
96	pos += 4; /* skip magic */
97	while (pos < end && *pos != DHCP_OPT_END) {
98		u8 opt, olen;
99
100		opt = *pos++;
101		if (opt == DHCP_OPT_PAD)
102			continue;
103		if (pos >= end)
104			break;
105		olen = *pos++;
106		if (olen > end - pos)
107			break;
108
109		switch (opt) {
110		case DHCP_OPT_SERVER_ID:
111			server_id = pos - 2;
112			break;
113		}
114		pos += olen;
115	}
116
117	if (wpabuf_resize(&sta->hlp_dhcp_discover,
118			  6 + 1 + (server_id ? 2 + server_id[1] : 0)))
119		return -1;
120	if (server_id)
121		wpabuf_put_data(sta->hlp_dhcp_discover, server_id,
122				2 + server_id[1]);
123	wpabuf_put_u8(sta->hlp_dhcp_discover, DHCP_OPT_REQUESTED_IP_ADDRESS);
124	wpabuf_put_u8(sta->hlp_dhcp_discover, 4);
125	wpabuf_put_data(sta->hlp_dhcp_discover, &dhcpoffer->your_ip, 4);
126	wpabuf_put_u8(sta->hlp_dhcp_discover, DHCP_OPT_END);
127
128	os_memset(&addr, 0, sizeof(addr));
129	addr.sin_family = AF_INET;
130	addr.sin_addr.s_addr = hapd->conf->dhcp_server.u.v4.s_addr;
131	addr.sin_port = htons(hapd->conf->dhcp_server_port);
132	res = sendto(hapd->dhcp_sock, wpabuf_head(sta->hlp_dhcp_discover),
133		     wpabuf_len(sta->hlp_dhcp_discover), 0,
134		     (const struct sockaddr *) &addr, sizeof(addr));
135	if (res < 0) {
136		wpa_printf(MSG_ERROR, "FILS: DHCP sendto failed: %s",
137			   strerror(errno));
138		return -1;
139	}
140	wpa_printf(MSG_DEBUG,
141		   "FILS: Acting as DHCP rapid commit proxy for %s:%d",
142		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
143	wpabuf_free(sta->hlp_dhcp_discover);
144	sta->hlp_dhcp_discover = NULL;
145	sta->fils_dhcp_rapid_commit_proxy = 1;
146	return 0;
147}
148
149
150static void fils_dhcp_handler(int sd, void *eloop_ctx, void *sock_ctx)
151{
152	struct hostapd_data *hapd = sock_ctx;
153	struct sta_info *sta;
154	u8 buf[1500], *pos, *end, *end_opt = NULL;
155	struct dhcp_data *dhcp;
156	struct sockaddr_in addr;
157	socklen_t addr_len;
158	ssize_t res;
159	u8 msgtype = 0;
160	int rapid_commit = 0;
161	struct iphdr *iph;
162	struct udphdr *udph;
163	struct wpabuf *resp;
164	const u8 *rpos;
165	size_t left, len;
166
167	addr_len = sizeof(addr);
168	res = recvfrom(sd, buf, sizeof(buf), 0,
169		       (struct sockaddr *) &addr, &addr_len);
170	if (res < 0) {
171		wpa_printf(MSG_DEBUG, "FILS: DHCP read failed: %s",
172			   strerror(errno));
173		return;
174	}
175	wpa_printf(MSG_DEBUG, "FILS: DHCP response from server %s:%d (len=%d)",
176		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port), (int) res);
177	wpa_hexdump(MSG_MSGDUMP, "FILS: HLP - DHCP server response", buf, res);
178	if ((size_t) res < sizeof(*dhcp))
179		return;
180	dhcp = (struct dhcp_data *) buf;
181	if (dhcp->op != 2)
182		return; /* Not a BOOTREPLY */
183	if (dhcp->relay_ip != hapd->conf->own_ip_addr.u.v4.s_addr) {
184		wpa_printf(MSG_DEBUG,
185			   "FILS: HLP - DHCP response to unknown relay address 0x%x",
186			   dhcp->relay_ip);
187		return;
188	}
189	dhcp->relay_ip = 0;
190	pos = (u8 *) (dhcp + 1);
191	end = &buf[res];
192
193	if (end - pos < 4 || WPA_GET_BE32(pos) != DHCP_MAGIC) {
194		wpa_printf(MSG_DEBUG, "FILS: HLP - no DHCP magic in response");
195		return;
196	}
197	pos += 4;
198
199	wpa_hexdump(MSG_DEBUG, "FILS: HLP - DHCP options in response",
200		    pos, end - pos);
201	while (pos < end && *pos != DHCP_OPT_END) {
202		u8 opt, olen;
203
204		opt = *pos++;
205		if (opt == DHCP_OPT_PAD)
206			continue;
207		if (pos >= end)
208			break;
209		olen = *pos++;
210		if (olen > end - pos)
211			break;
212
213		switch (opt) {
214		case DHCP_OPT_MSG_TYPE:
215			if (olen > 0)
216				msgtype = pos[0];
217			break;
218		case DHCP_OPT_RAPID_COMMIT:
219			rapid_commit = 1;
220			break;
221		}
222		pos += olen;
223	}
224	if (pos < end && *pos == DHCP_OPT_END)
225		end_opt = pos;
226
227	wpa_printf(MSG_DEBUG,
228		   "FILS: HLP - DHCP message type %u (rapid_commit=%d hw_addr="
229		   MACSTR ")",
230		   msgtype, rapid_commit, MAC2STR(dhcp->hw_addr));
231
232	sta = ap_get_sta(hapd, dhcp->hw_addr);
233	if (!sta || !sta->fils_pending_assoc_req) {
234		wpa_printf(MSG_DEBUG,
235			   "FILS: No pending HLP DHCP exchange with hw_addr"
236			   MACSTR, MAC2STR(dhcp->hw_addr));
237		return;
238	}
239
240	if (hapd->conf->dhcp_rapid_commit_proxy && msgtype == DHCPOFFER &&
241	    !rapid_commit) {
242		/* Use hostapd to take care of 4-message exchange and convert
243		 * the final DHCPACK to rapid commit version. */
244		if (fils_dhcp_request(hapd, sta, dhcp, end) == 0)
245			return;
246		/* failed, so send the server response as-is */
247	} else if (msgtype != DHCPACK) {
248		wpa_printf(MSG_DEBUG,
249			   "FILS: No DHCPACK available from the server and cannot do rapid commit proxying");
250	}
251
252	pos = buf;
253	resp = wpabuf_alloc(2 * ETH_ALEN + 6 + 2 +
254			    sizeof(*iph) + sizeof(*udph) + (end - pos) + 2);
255	if (!resp)
256		return;
257	wpabuf_put_data(resp, sta->addr, ETH_ALEN);
258	wpabuf_put_data(resp, hapd->own_addr, ETH_ALEN);
259	wpabuf_put_data(resp, "\xaa\xaa\x03\x00\x00\x00", 6);
260	wpabuf_put_be16(resp, ETH_P_IP);
261	iph = wpabuf_put(resp, sizeof(*iph));
262	iph->version = 4;
263	iph->ihl = sizeof(*iph) / 4;
264	iph->tot_len = htons(sizeof(*iph) + sizeof(*udph) + (end - pos));
265	iph->ttl = 1;
266	iph->saddr = hapd->conf->dhcp_server.u.v4.s_addr;
267	iph->daddr = dhcp->client_ip;
268	iph->check = ip_checksum(iph, sizeof(*iph));
269	udph = wpabuf_put(resp, sizeof(*udph));
270	udph->uh_sport = htons(DHCP_SERVER_PORT);
271	udph->uh_dport = htons(DHCP_CLIENT_PORT);
272	udph->len = htons(sizeof(*udph) + (end - pos));
273	udph->check = htons(0x0000); /* TODO: calculate checksum */
274	if (hapd->conf->dhcp_rapid_commit_proxy && msgtype == DHCPACK &&
275	    !rapid_commit && sta->fils_dhcp_rapid_commit_proxy && end_opt) {
276		/* Add rapid commit option */
277		wpabuf_put_data(resp, pos, end_opt - pos);
278		wpabuf_put_u8(resp, DHCP_OPT_RAPID_COMMIT);
279		wpabuf_put_u8(resp, 0);
280		wpabuf_put_data(resp, end_opt, end - end_opt);
281	} else {
282		wpabuf_put_data(resp, pos, end - pos);
283	}
284	if (wpabuf_resize(&sta->fils_hlp_resp, wpabuf_len(resp) +
285			  2 * wpabuf_len(resp) / 255 + 100)) {
286		wpabuf_free(resp);
287		return;
288	}
289
290	rpos = wpabuf_head(resp);
291	left = wpabuf_len(resp);
292
293	wpabuf_put_u8(sta->fils_hlp_resp, WLAN_EID_EXTENSION); /* Element ID */
294	if (left <= 254)
295		len = 1 + left;
296	else
297		len = 255;
298	wpabuf_put_u8(sta->fils_hlp_resp, len); /* Length */
299	/* Element ID Extension */
300	wpabuf_put_u8(sta->fils_hlp_resp, WLAN_EID_EXT_FILS_HLP_CONTAINER);
301	/* Destination MAC Address, Source MAC Address, HLP Packet.
302	 * HLP Packet is in MSDU format (i.e., including the LLC/SNAP header
303	 * when LPD is used). */
304	wpabuf_put_data(sta->fils_hlp_resp, rpos, len - 1);
305	rpos += len - 1;
306	left -= len - 1;
307	while (left) {
308		wpabuf_put_u8(sta->fils_hlp_resp, WLAN_EID_FRAGMENT);
309		len = left > 255 ? 255 : left;
310		wpabuf_put_u8(sta->fils_hlp_resp, len);
311		wpabuf_put_data(sta->fils_hlp_resp, rpos, len);
312		rpos += len;
313		left -= len;
314	}
315	wpabuf_free(resp);
316	fils_hlp_finish_assoc(hapd, sta);
317}
318
319
320static int fils_process_hlp_dhcp(struct hostapd_data *hapd,
321				 struct sta_info *sta,
322				 const u8 *msg, size_t len)
323{
324	const struct dhcp_data *dhcp;
325	struct wpabuf *dhcp_buf;
326	struct dhcp_data *dhcp_msg;
327	u8 msgtype = 0;
328	int rapid_commit = 0;
329	const u8 *pos = msg, *end;
330	struct sockaddr_in addr;
331	ssize_t res;
332
333	if (len < sizeof(*dhcp))
334		return 0;
335	dhcp = (const struct dhcp_data *) pos;
336	end = pos + len;
337	wpa_printf(MSG_DEBUG,
338		   "FILS: HLP request DHCP: op=%u htype=%u hlen=%u hops=%u xid=0x%x",
339		   dhcp->op, dhcp->htype, dhcp->hlen, dhcp->hops,
340		   ntohl(dhcp->xid));
341	pos += sizeof(*dhcp);
342	if (dhcp->op != 1)
343		return 0; /* Not a BOOTREQUEST */
344
345	if (end - pos < 4)
346		return 0;
347	if (WPA_GET_BE32(pos) != DHCP_MAGIC) {
348		wpa_printf(MSG_DEBUG, "FILS: HLP - no DHCP magic");
349		return 0;
350	}
351	pos += 4;
352
353	wpa_hexdump(MSG_DEBUG, "FILS: HLP - DHCP options", pos, end - pos);
354	while (pos < end && *pos != DHCP_OPT_END) {
355		u8 opt, olen;
356
357		opt = *pos++;
358		if (opt == DHCP_OPT_PAD)
359			continue;
360		if (pos >= end)
361			break;
362		olen = *pos++;
363		if (olen > end - pos)
364			break;
365
366		switch (opt) {
367		case DHCP_OPT_MSG_TYPE:
368			if (olen > 0)
369				msgtype = pos[0];
370			break;
371		case DHCP_OPT_RAPID_COMMIT:
372			rapid_commit = 1;
373			break;
374		}
375		pos += olen;
376	}
377
378	wpa_printf(MSG_DEBUG, "FILS: HLP - DHCP message type %u", msgtype);
379	if (msgtype != DHCPDISCOVER)
380		return 0;
381
382	if (hapd->conf->dhcp_server.af != AF_INET ||
383	    hapd->conf->dhcp_server.u.v4.s_addr == 0) {
384		wpa_printf(MSG_DEBUG,
385			   "FILS: HLP - no DHCPv4 server configured - drop request");
386		return 0;
387	}
388
389	if (hapd->conf->own_ip_addr.af != AF_INET ||
390	    hapd->conf->own_ip_addr.u.v4.s_addr == 0) {
391		wpa_printf(MSG_DEBUG,
392			   "FILS: HLP - no IPv4 own_ip_addr configured - drop request");
393		return 0;
394	}
395
396	if (hapd->dhcp_sock < 0) {
397		int s;
398
399		s = socket(AF_INET, SOCK_DGRAM, 0);
400		if (s < 0) {
401			wpa_printf(MSG_ERROR,
402				   "FILS: Failed to open DHCP socket: %s",
403				   strerror(errno));
404			return 0;
405		}
406
407		if (hapd->conf->dhcp_relay_port) {
408			os_memset(&addr, 0, sizeof(addr));
409			addr.sin_family = AF_INET;
410			addr.sin_addr.s_addr =
411				hapd->conf->own_ip_addr.u.v4.s_addr;
412			addr.sin_port = htons(hapd->conf->dhcp_relay_port);
413			if (bind(s, (struct sockaddr *) &addr, sizeof(addr))) {
414				wpa_printf(MSG_ERROR,
415					   "FILS: Failed to bind DHCP socket: %s",
416					   strerror(errno));
417				close(s);
418				return 0;
419			}
420		}
421		if (eloop_register_sock(s, EVENT_TYPE_READ,
422					fils_dhcp_handler, NULL, hapd)) {
423			close(s);
424			return 0;
425		}
426
427		hapd->dhcp_sock = s;
428	}
429
430	dhcp_buf = wpabuf_alloc(len);
431	if (!dhcp_buf)
432		return 0;
433	dhcp_msg = wpabuf_put(dhcp_buf, len);
434	os_memcpy(dhcp_msg, msg, len);
435	dhcp_msg->relay_ip = hapd->conf->own_ip_addr.u.v4.s_addr;
436	os_memset(&addr, 0, sizeof(addr));
437	addr.sin_family = AF_INET;
438	addr.sin_addr.s_addr = hapd->conf->dhcp_server.u.v4.s_addr;
439	addr.sin_port = htons(hapd->conf->dhcp_server_port);
440	res = sendto(hapd->dhcp_sock, dhcp_msg, len, 0,
441		     (const struct sockaddr *) &addr, sizeof(addr));
442	if (res < 0) {
443		wpa_printf(MSG_ERROR, "FILS: DHCP sendto failed: %s",
444			   strerror(errno));
445		wpabuf_free(dhcp_buf);
446		/* Close the socket to try to recover from error */
447		eloop_unregister_read_sock(hapd->dhcp_sock);
448		close(hapd->dhcp_sock);
449		hapd->dhcp_sock = -1;
450		return 0;
451	}
452
453	wpa_printf(MSG_DEBUG,
454		   "FILS: HLP relayed DHCP request to server %s:%d (rapid_commit=%d)",
455		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port),
456		   rapid_commit);
457	if (hapd->conf->dhcp_rapid_commit_proxy && rapid_commit) {
458		/* Store a copy of the DHCPDISCOVER for rapid commit proxying
459		 * purposes if the server does not support the rapid commit
460		 * option. */
461		wpa_printf(MSG_DEBUG,
462			   "FILS: Store DHCPDISCOVER for rapid commit proxy");
463		wpabuf_free(sta->hlp_dhcp_discover);
464		sta->hlp_dhcp_discover = dhcp_buf;
465	} else {
466		wpabuf_free(dhcp_buf);
467	}
468
469	return 1;
470}
471
472
473static int fils_process_hlp_udp(struct hostapd_data *hapd,
474				struct sta_info *sta, const u8 *dst,
475				const u8 *pos, size_t len)
476{
477	const struct iphdr *iph;
478	const struct udphdr *udph;
479	u16 sport, dport, ulen;
480
481	if (len < sizeof(*iph) + sizeof(*udph))
482		return 0;
483	iph = (const struct iphdr *) pos;
484	udph = (const struct udphdr *) (iph + 1);
485	sport = ntohs(udph->uh_sport);
486	dport = ntohs(udph->uh_dport);
487	ulen = ntohs(udph->uh_ulen);
488	wpa_printf(MSG_DEBUG,
489		   "FILS: HLP request UDP: sport=%u dport=%u ulen=%u sum=0x%x",
490		   sport, dport, ulen, ntohs(udph->uh_sum));
491	/* TODO: Check UDP checksum */
492	if (ulen < sizeof(*udph) || ulen > len - sizeof(*iph))
493		return 0;
494
495	if (dport == DHCP_SERVER_PORT && sport == DHCP_CLIENT_PORT) {
496		return fils_process_hlp_dhcp(hapd, sta, (const u8 *) (udph + 1),
497					     ulen - sizeof(*udph));
498	}
499
500	return 0;
501}
502
503
504static int fils_process_hlp_ip(struct hostapd_data *hapd,
505			       struct sta_info *sta, const u8 *dst,
506			       const u8 *pos, size_t len)
507{
508	const struct iphdr *iph;
509	u16 tot_len;
510
511	if (len < sizeof(*iph))
512		return 0;
513	iph = (const struct iphdr *) pos;
514	if (ip_checksum(iph, sizeof(*iph)) != 0) {
515		wpa_printf(MSG_DEBUG,
516			   "FILS: HLP request IPv4 packet had invalid header checksum - dropped");
517		return 0;
518	}
519	tot_len = ntohs(iph->tot_len);
520	if (tot_len > len)
521		return 0;
522	wpa_printf(MSG_DEBUG,
523		   "FILS: HLP request IPv4: saddr=%08x daddr=%08x protocol=%u",
524		   iph->saddr, iph->daddr, iph->protocol);
525	switch (iph->protocol) {
526	case 17:
527		return fils_process_hlp_udp(hapd, sta, dst, pos, len);
528	}
529
530	return 0;
531}
532
533
534static int fils_process_hlp_req(struct hostapd_data *hapd,
535				struct sta_info *sta,
536				const u8 *pos, size_t len)
537{
538	const u8 *pkt, *end;
539
540	wpa_printf(MSG_DEBUG, "FILS: HLP request from " MACSTR " (dst=" MACSTR
541		   " src=" MACSTR " len=%u)",
542		   MAC2STR(sta->addr), MAC2STR(pos), MAC2STR(pos + ETH_ALEN),
543		   (unsigned int) len);
544	if (os_memcmp(sta->addr, pos + ETH_ALEN, ETH_ALEN) != 0) {
545		wpa_printf(MSG_DEBUG,
546			   "FILS: Ignore HLP request with unexpected source address"
547			   MACSTR, MAC2STR(pos + ETH_ALEN));
548		return 0;
549	}
550
551	end = pos + len;
552	pkt = pos + 2 * ETH_ALEN;
553	if (end - pkt >= 6 &&
554	    os_memcmp(pkt, "\xaa\xaa\x03\x00\x00\x00", 6) == 0)
555		pkt += 6; /* Remove SNAP/LLC header */
556	wpa_hexdump(MSG_MSGDUMP, "FILS: HLP request packet", pkt, end - pkt);
557
558	if (end - pkt < 2)
559		return 0;
560
561	switch (WPA_GET_BE16(pkt)) {
562	case ETH_P_IP:
563		return fils_process_hlp_ip(hapd, sta, pos, pkt + 2,
564					   end - pkt - 2);
565	}
566
567	return 0;
568}
569
570
571int fils_process_hlp(struct hostapd_data *hapd, struct sta_info *sta,
572		     const u8 *pos, int left)
573{
574	const u8 *end = pos + left;
575	u8 *tmp, *tmp_pos;
576	int ret = 0;
577
578	/* Old DHCPDISCOVER is not needed anymore, if it was still pending */
579	wpabuf_free(sta->hlp_dhcp_discover);
580	sta->hlp_dhcp_discover = NULL;
581	sta->fils_dhcp_rapid_commit_proxy = 0;
582
583	/* Check if there are any FILS HLP Container elements */
584	while (end - pos >= 2) {
585		if (2 + pos[1] > end - pos)
586			return 0;
587		if (pos[0] == WLAN_EID_EXTENSION &&
588		    pos[1] >= 1 + 2 * ETH_ALEN &&
589		    pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER)
590			break;
591		pos += 2 + pos[1];
592	}
593	if (end - pos < 2)
594		return 0; /* No FILS HLP Container elements */
595
596	tmp = os_malloc(end - pos);
597	if (!tmp)
598		return 0;
599
600	while (end - pos >= 2) {
601		if (2 + pos[1] > end - pos ||
602		    pos[0] != WLAN_EID_EXTENSION ||
603		    pos[1] < 1 + 2 * ETH_ALEN ||
604		    pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER)
605			break;
606		tmp_pos = tmp;
607		os_memcpy(tmp_pos, pos + 3, pos[1] - 1);
608		tmp_pos += pos[1] - 1;
609		pos += 2 + pos[1];
610
611		/* Add possible fragments */
612		while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT &&
613		       2 + pos[1] <= end - pos) {
614			os_memcpy(tmp_pos, pos + 2, pos[1]);
615			tmp_pos += pos[1];
616			pos += 2 + pos[1];
617		}
618
619		if (fils_process_hlp_req(hapd, sta, tmp, tmp_pos - tmp) > 0)
620			ret = 1;
621	}
622
623	os_free(tmp);
624
625	return ret;
626}
627
628
629void fils_hlp_deinit(struct hostapd_data *hapd)
630{
631	if (hapd->dhcp_sock >= 0) {
632		eloop_unregister_read_sock(hapd->dhcp_sock);
633		close(hapd->dhcp_sock);
634		hapd->dhcp_sock = -1;
635	}
636}
637