[thirdparty/hostap.git] / src / wps / http_server.c

/*
 * http_server - HTTP server
 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"
#include <fcntl.h>

#include "common.h"
#include "eloop.h"
#include "httpread.h"
#include "http_server.h"

#define HTTP_SERVER_TIMEOUT 30
#define HTTP_SERVER_MAX_REQ_LEN 8000
#define HTTP_SERVER_MAX_CONNECTIONS 10

struct http_request {
	struct http_request *next;
	struct http_server *srv;
	int fd;
	struct sockaddr_in cli;
	struct httpread *hread;
};

struct http_server {
	void (*cb)(void *ctx, struct http_request *req);
	void *cb_ctx;

	int fd;
	int port;

	struct http_request *requests;
	unsigned int request_count;
};


static void http_request_cb(struct httpread *handle, void *cookie,
			    enum httpread_event en)
{
	struct http_request *req = cookie;
	struct http_server *srv = req->srv;

	if (en == HTTPREAD_EVENT_FILE_READY) {
		wpa_printf(MSG_DEBUG, "HTTP: Request from %s:%d received",
			   inet_ntoa(req->cli.sin_addr),
			   ntohs(req->cli.sin_port));
		srv->cb(srv->cb_ctx, req);
		return;
	}
	wpa_printf(MSG_DEBUG, "HTTP: Request from %s:%d could not be received "
		   "completely", inet_ntoa(req->cli.sin_addr),
		   ntohs(req->cli.sin_port));
	http_request_deinit(req);
}


static struct http_request * http_request_init(struct http_server *srv, int fd,
					       struct sockaddr_in *cli)
{
	struct http_request *req;

	if (srv->request_count >= HTTP_SERVER_MAX_CONNECTIONS) {
		wpa_printf(MSG_DEBUG, "HTTP: Too many concurrent requests");
		return NULL;
	}

	req = os_zalloc(sizeof(*req));
	if (req == NULL)
		return NULL;

	req->srv = srv;
	req->fd = fd;
	req->cli = *cli;

	req->hread = httpread_create(req->fd, http_request_cb, req,
				     HTTP_SERVER_MAX_REQ_LEN,
				     HTTP_SERVER_TIMEOUT);
	if (req->hread == NULL) {
		http_request_deinit(req);
		return NULL;
	}

	return req;
}


void http_request_deinit(struct http_request *req)
{
	struct http_request *r, *p;
	struct http_server *srv;

	if (req == NULL)
		return;

	srv = req->srv;
	p = NULL;
	r = srv->requests;
	while (r) {
		if (r == req) {
			if (p)
				p->next = r->next;
			else
				srv->requests = r->next;
			srv->request_count--;
			break;
		}
		p = r;
		r = r->next;
	}

	httpread_destroy(req->hread);
	close(req->fd);
	os_free(req);
}


static void http_request_free_all(struct http_request *req)
{
	struct http_request *prev;
	while (req) {
		prev = req;
		req = req->next;
		http_request_deinit(prev);
	}
}


void http_request_send(struct http_request *req, struct wpabuf *resp)
{
	int res;

	wpa_printf(MSG_DEBUG, "HTTP: Send %lu byte response to %s:%d",
		   (unsigned long) wpabuf_len(resp),
		   inet_ntoa(req->cli.sin_addr),
		   ntohs(req->cli.sin_port));

	res = send(req->fd, wpabuf_head(resp), wpabuf_len(resp), 0);
	if (res < 0) {
		wpa_printf(MSG_DEBUG, "HTTP: Send failed: %s",
			   strerror(errno));
	} else if ((size_t) res < wpabuf_len(resp)) {
		wpa_printf(MSG_DEBUG, "HTTP: Sent only %d of %lu bytes",
			   res, (unsigned long) wpabuf_len(resp));
		/* TODO: add eloop handler for sending rest of the data */
	}

	wpabuf_free(resp);
}


void http_request_send_and_deinit(struct http_request *req,
				  struct wpabuf *resp)
{
	http_request_send(req, resp);
	http_request_deinit(req);
}


enum httpread_hdr_type http_request_get_type(struct http_request *req)
{
	return httpread_hdr_type_get(req->hread);
}


char * http_request_get_uri(struct http_request *req)
{
	return httpread_uri_get(req->hread);
}


char * http_request_get_hdr(struct http_request *req)
{
	return httpread_hdr_get(req->hread);
}


char * http_request_get_data(struct http_request *req)
{
	return httpread_data_get(req->hread);
}


char * http_request_get_hdr_line(struct http_request *req, const char *tag)
{
	return httpread_hdr_line_get(req->hread, tag);
}


struct sockaddr_in * http_request_get_cli_addr(struct http_request *req)
{
	return &req->cli;
}


static void http_server_cb(int sd, void *eloop_ctx, void *sock_ctx)
{
	struct sockaddr_in addr;
	socklen_t addr_len = sizeof(addr);
	struct http_server *srv = eloop_ctx;
	int conn;
	struct http_request *req;

	conn = accept(srv->fd, (struct sockaddr *) &addr, &addr_len);
	if (conn < 0) {
		wpa_printf(MSG_DEBUG, "HTTP: Failed to accept new connection: "
			   "%s", strerror(errno));
		return;
	}
	wpa_printf(MSG_DEBUG, "HTTP: Connection from %s:%d",
		   inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));

	req = http_request_init(srv, conn, &addr);
	if (req == NULL) {
		close(conn);
		return;
	}

	req->next = srv->requests;
	srv->requests = req;
	srv->request_count++;
}


struct http_server * http_server_init(struct in_addr *addr, int port,
				      void (*cb)(void *ctx,
						 struct http_request *req),
				      void *cb_ctx)
{
	struct sockaddr_in sin;
	struct http_server *srv;

	srv = os_zalloc(sizeof(*srv));
	if (srv == NULL)
		return NULL;
	srv->cb = cb;
	srv->cb_ctx = cb_ctx;

	srv->fd = socket(AF_INET, SOCK_STREAM, 0);
	if (srv->fd < 0)
		goto fail;
	if (fcntl(srv->fd, F_SETFL, O_NONBLOCK) < 0)
		goto fail;
	if (port < 0)
		srv->port = 49152;
	else
		srv->port = port;

	os_memset(&sin, 0, sizeof(sin));
	sin.sin_family = AF_INET;
	sin.sin_addr.s_addr = addr->s_addr;

	for (;;) {
		sin.sin_port = htons(srv->port);
		if (bind(srv->fd, (struct sockaddr *) &sin, sizeof(sin)) == 0)
			break;
		if (errno == EADDRINUSE) {
			/* search for unused port */
			if (++srv->port == 65535 || port >= 0)
				goto fail;
			continue;
		}
		wpa_printf(MSG_DEBUG, "HTTP: Failed to bind server port %d: "
			   "%s", srv->port, strerror(errno));
		goto fail;
	}
	if (listen(srv->fd, 10 /* max backlog */) < 0)
		goto fail;
	if (fcntl(srv->fd, F_SETFL, O_NONBLOCK) < 0)
		goto fail;
	if (eloop_register_sock(srv->fd, EVENT_TYPE_READ, http_server_cb,
				srv, NULL))
		goto fail;

	wpa_printf(MSG_DEBUG, "HTTP: Started server on %s:%d",
		   inet_ntoa(*addr), srv->port);

	return srv;

fail:
	http_server_deinit(srv);
	return NULL;
}


void http_server_deinit(struct http_server *srv)
{
	if (srv == NULL)
		return;
	if (srv->fd >= 0) {
		eloop_unregister_sock(srv->fd, EVENT_TYPE_READ);
		close(srv->fd);
	}
	http_request_free_all(srv->requests);

	os_free(srv);
}


int http_server_get_port(struct http_server *srv)
{
	return srv->port;
}
Commit	Line	Data
8d5aca73	1	/*
b905c4a3 JM	2	* http_server - HTTP server
	3	* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
	4	*
0f3d578e JM	5	* This software may be distributed under the terms of the BSD license.
0f3d578e JM	6	* See README for more details.
b905c4a3 JM	7	*/
	8
	9	#include "includes.h"
	10	#include <fcntl.h>
	11
	12	#include "common.h"
	13	#include "eloop.h"
875a4e59	14	#include "httpread.h"
b905c4a3 JM	15	#include "http_server.h"
b905c4a3 JM	16
875a4e59 JM	17	#define HTTP_SERVER_TIMEOUT 30
	18	#define HTTP_SERVER_MAX_REQ_LEN 8000
	19	#define HTTP_SERVER_MAX_CONNECTIONS 10
	20
	21	struct http_request {
	22	struct http_request *next;
	23	struct http_server *srv;
	24	int fd;
	25	struct sockaddr_in cli;
	26	struct httpread *hread;
	27	};
b905c4a3 JM	28
b905c4a3 JM	29	struct http_server {
875a4e59	30	void (cb)(void ctx, struct http_request *req);
b905c4a3 JM	31	void *cb_ctx;
	32
	33	int fd;
	34	int port;
875a4e59 JM	35
	36	struct http_request *requests;
	37	unsigned int request_count;
b905c4a3 JM	38	};
	39
	40
875a4e59 JM	41	static void http_request_cb(struct httpread handle, void cookie,
	42	enum httpread_event en)
	43	{
	44	struct http_request *req = cookie;
	45	struct http_server *srv = req->srv;
	46
	47	if (en == HTTPREAD_EVENT_FILE_READY) {
	48	wpa_printf(MSG_DEBUG, "HTTP: Request from %s:%d received",
	49	inet_ntoa(req->cli.sin_addr),
	50	ntohs(req->cli.sin_port));
	51	srv->cb(srv->cb_ctx, req);
	52	return;
	53	}
	54	wpa_printf(MSG_DEBUG, "HTTP: Request from %s:%d could not be received "
	55	"completely", inet_ntoa(req->cli.sin_addr),
	56	ntohs(req->cli.sin_port));
	57	http_request_deinit(req);
	58	}
	59
	60
	61	static struct http_request * http_request_init(struct http_server *srv, int fd,
	62	struct sockaddr_in *cli)
	63	{
	64	struct http_request *req;
	65
	66	if (srv->request_count >= HTTP_SERVER_MAX_CONNECTIONS) {
	67	wpa_printf(MSG_DEBUG, "HTTP: Too many concurrent requests");
	68	return NULL;
	69	}
	70
	71	req = os_zalloc(sizeof(*req));
	72	if (req == NULL)
	73	return NULL;
	74
	75	req->srv = srv;
	76	req->fd = fd;
	77	req->cli = *cli;
	78
	79	req->hread = httpread_create(req->fd, http_request_cb, req,
	80	HTTP_SERVER_MAX_REQ_LEN,
	81	HTTP_SERVER_TIMEOUT);
	82	if (req->hread == NULL) {
	83	http_request_deinit(req);
	84	return NULL;
	85	}
	86
	87	return req;
	88	}
	89
	90
	91	void http_request_deinit(struct http_request *req)
	92	{
	93	struct http_request r, p;
	94	struct http_server *srv;
	95
	96	if (req == NULL)
	97	return;
	98
	99	srv = req->srv;
	100	p = NULL;
	101	r = srv->requests;
	102	while (r) {
	103	if (r == req) {
	104	if (p)
105	p->next = r->next;
106	else
107	srv->requests = r->next;
108	srv->request_count--;
109	break;
110	}
111	p = r;
112	r = r->next;
113	}
114
115	httpread_destroy(req->hread);
116	close(req->fd);
117	os_free(req);
118	}
119
120
121	static void http_request_free_all(struct http_request *req)
122	{
123	struct http_request *prev;
124	while (req) {
125	prev = req;
126	req = req->next;
127	http_request_deinit(prev);
128	}
129	}
130
131
132	void http_request_send(struct http_request req, struct wpabuf resp)
133	{
134	int res;
135
136	wpa_printf(MSG_DEBUG, "HTTP: Send %lu byte response to %s:%d",
efa64814 JM	137	(unsigned long) wpabuf_len(resp),
efa64814 JM	138	inet_ntoa(req->cli.sin_addr),
875a4e59 JM	139	ntohs(req->cli.sin_port));
	140
	141	res = send(req->fd, wpabuf_head(resp), wpabuf_len(resp), 0);
	142	if (res < 0) {
	143	wpa_printf(MSG_DEBUG, "HTTP: Send failed: %s",
	144	strerror(errno));
	145	} else if ((size_t) res < wpabuf_len(resp)) {
	146	wpa_printf(MSG_DEBUG, "HTTP: Sent only %d of %lu bytes",
	147	res, (unsigned long) wpabuf_len(resp));
	148	/* TODO: add eloop handler for sending rest of the data */
	149	}
	150
	151	wpabuf_free(resp);
	152	}
	153
	154
	155	void http_request_send_and_deinit(struct http_request *req,
	156	struct wpabuf *resp)
	157	{
	158	http_request_send(req, resp);
	159	http_request_deinit(req);
	160	}
	161
	162
	163	enum httpread_hdr_type http_request_get_type(struct http_request *req)
	164	{
	165	return httpread_hdr_type_get(req->hread);
	166	}
	167
	168
	169	char * http_request_get_uri(struct http_request *req)
	170	{
	171	return httpread_uri_get(req->hread);
	172	}
	173
	174
	175	char * http_request_get_hdr(struct http_request *req)
	176	{
	177	return httpread_hdr_get(req->hread);
	178	}
	179
	180
	181	char * http_request_get_data(struct http_request *req)
	182	{
	183	return httpread_data_get(req->hread);
	184	}
	185
	186
	187	char * http_request_get_hdr_line(struct http_request req, const char tag)
	188	{
	189	return httpread_hdr_line_get(req->hread, tag);
	190	}
	191
	192
	193	struct sockaddr_in * http_request_get_cli_addr(struct http_request *req)
	194	{
	195	return &req->cli;
	196	}
	197
	198
b905c4a3 JM	199	static void http_server_cb(int sd, void eloop_ctx, void sock_ctx)
	200	{
	201	struct sockaddr_in addr;
	202	socklen_t addr_len = sizeof(addr);
	203	struct http_server *srv = eloop_ctx;
	204	int conn;
875a4e59	205	struct http_request *req;
b905c4a3 JM	206
	207	conn = accept(srv->fd, (struct sockaddr *) &addr, &addr_len);
	208	if (conn < 0) {
	209	wpa_printf(MSG_DEBUG, "HTTP: Failed to accept new connection: "
	210	"%s", strerror(errno));
	211	return;
	212	}
	213	wpa_printf(MSG_DEBUG, "HTTP: Connection from %s:%d",
	214	inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
875a4e59 JM	215
	216	req = http_request_init(srv, conn, &addr);
	217	if (req == NULL) {
	218	close(conn);
	219	return;
	220	}
	221
	222	req->next = srv->requests;
	223	srv->requests = req;
	224	srv->request_count++;
b905c4a3 JM	225	}
	226
	227
	228	struct http_server * http_server_init(struct in_addr *addr, int port,
875a4e59 JM	229	void (cb)(void ctx,
875a4e59 JM	230	struct http_request *req),
b905c4a3 JM	231	void *cb_ctx)
	232	{
	233	struct sockaddr_in sin;
	234	struct http_server *srv;
	235
	236	srv = os_zalloc(sizeof(*srv));
	237	if (srv == NULL)
	238	return NULL;
	239	srv->cb = cb;
	240	srv->cb_ctx = cb_ctx;
	241
	242	srv->fd = socket(AF_INET, SOCK_STREAM, 0);
	243	if (srv->fd < 0)
	244	goto fail;
	245	if (fcntl(srv->fd, F_SETFL, O_NONBLOCK) < 0)
	246	goto fail;
	247	if (port < 0)
	248	srv->port = 49152;
	249	else
	250	srv->port = port;
	251
	252	os_memset(&sin, 0, sizeof(sin));
	253	sin.sin_family = AF_INET;
	254	sin.sin_addr.s_addr = addr->s_addr;
	255
	256	for (;;) {
	257	sin.sin_port = htons(srv->port);
	258	if (bind(srv->fd, (struct sockaddr *) &sin, sizeof(sin)) == 0)
	259	break;
	260	if (errno == EADDRINUSE) {
	261	/* search for unused port */
	262	if (++srv->port == 65535 \|\| port >= 0)
	263	goto fail;
	264	continue;
	265	}
	266	wpa_printf(MSG_DEBUG, "HTTP: Failed to bind server port %d: "
	267	"%s", srv->port, strerror(errno));
	268	goto fail;
	269	}
	270	if (listen(srv->fd, 10 /* max backlog */) < 0)
	271	goto fail;
	272	if (fcntl(srv->fd, F_SETFL, O_NONBLOCK) < 0)
	273	goto fail;
	274	if (eloop_register_sock(srv->fd, EVENT_TYPE_READ, http_server_cb,
	275	srv, NULL))
	276	goto fail;
	277
	278	wpa_printf(MSG_DEBUG, "HTTP: Started server on %s:%d",
	279	inet_ntoa(*addr), srv->port);
	280
	281	return srv;
	282
	283	fail:
	284	http_server_deinit(srv);
	285	return NULL;
	286	}
	287
	288
	289	void http_server_deinit(struct http_server *srv)
	290	{
	291	if (srv == NULL)
	292	return;
	293	if (srv->fd >= 0) {
	294	eloop_unregister_sock(srv->fd, EVENT_TYPE_READ);
295	close(srv->fd);
296	}
875a4e59	297	http_request_free_all(srv->requests);
b905c4a3 JM	298
	299	os_free(srv);
	300	}
	301
	302
	303	int http_server_get_port(struct http_server *srv)
	304	{
	305	return srv->port;
	306	}