2 * http_client - HTTP client
3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
21 #include "http_client.h"
24 #define HTTP_CLIENT_TIMEOUT_SEC 30
28 struct sockaddr_in dst;
34 void (*cb)(void *ctx, struct http_client *c,
35 enum http_client_event event);
37 struct httpread *hread;
42 static void http_client_timeout(void *eloop_data, void *user_ctx)
44 struct http_client *c = eloop_data;
45 wpa_printf(MSG_DEBUG, "HTTP: Timeout (c=%p)", c);
46 c->cb(c->cb_ctx, c, HTTP_CLIENT_TIMEOUT);
50 static void http_client_got_response(struct httpread *handle, void *cookie,
51 enum httpread_event e)
53 struct http_client *c = cookie;
55 wpa_printf(MSG_DEBUG, "HTTP: httpread callback: handle=%p cookie=%p "
56 "e=%d", handle, cookie, e);
58 eloop_cancel_timeout(http_client_timeout, c, NULL);
60 case HTTPREAD_EVENT_FILE_READY:
61 if (httpread_hdr_type_get(c->hread) == HTTPREAD_HDR_TYPE_REPLY)
63 int reply_code = httpread_reply_code_get(c->hread);
64 if (reply_code == 200 /* OK */) {
65 wpa_printf(MSG_DEBUG, "HTTP: Response OK from "
67 inet_ntoa(c->dst.sin_addr),
68 ntohs(c->dst.sin_port));
69 c->cb(c->cb_ctx, c, HTTP_CLIENT_OK);
71 wpa_printf(MSG_DEBUG, "HTTP: Error %d from "
73 inet_ntoa(c->dst.sin_addr),
74 ntohs(c->dst.sin_port));
75 c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY);
78 c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY);
80 case HTTPREAD_EVENT_TIMEOUT:
81 c->cb(c->cb_ctx, c, HTTP_CLIENT_TIMEOUT);
83 case HTTPREAD_EVENT_ERROR:
84 c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED);
90 static void http_client_tx_ready(int sock, void *eloop_ctx, void *sock_ctx)
92 struct http_client *c = eloop_ctx;
95 wpa_printf(MSG_DEBUG, "HTTP: Send client request to %s:%d (%lu of %lu "
97 inet_ntoa(c->dst.sin_addr), ntohs(c->dst.sin_port),
98 (unsigned long) wpabuf_len(c->req),
99 (unsigned long) wpabuf_len(c->req) - c->req_pos);
101 res = send(c->sd, wpabuf_head(c->req) + c->req_pos,
102 wpabuf_len(c->req) - c->req_pos, 0);
104 wpa_printf(MSG_DEBUG, "HTTP: Failed to send buffer: %s",
106 eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
107 c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED);
111 if ((size_t) res < wpabuf_len(c->req) - c->req_pos) {
112 wpa_printf(MSG_DEBUG, "HTTP: Sent %d of %lu bytes; %lu bytes "
114 res, (unsigned long) wpabuf_len(c->req),
115 (unsigned long) wpabuf_len(c->req) - c->req_pos -
121 wpa_printf(MSG_DEBUG, "HTTP: Full client request sent to %s:%d",
122 inet_ntoa(c->dst.sin_addr), ntohs(c->dst.sin_port));
123 eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
127 c->hread = httpread_create(c->sd, http_client_got_response, c,
128 c->max_response, HTTP_CLIENT_TIMEOUT_SEC);
129 if (c->hread == NULL) {
130 c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED);
136 struct http_client * http_client_addr(struct sockaddr_in *dst,
137 struct wpabuf *req, size_t max_response,
138 void (*cb)(void *ctx,
139 struct http_client *c,
140 enum http_client_event event),
143 struct http_client *c;
145 c = os_zalloc(sizeof(*c));
150 c->max_response = max_response;
154 c->sd = socket(AF_INET, SOCK_STREAM, 0);
160 if (fcntl(c->sd, F_SETFL, O_NONBLOCK) != 0) {
161 wpa_printf(MSG_DEBUG, "HTTP: fnctl(O_NONBLOCK) failed: %s",
167 if (connect(c->sd, (struct sockaddr *) dst, sizeof(*dst))) {
168 if (errno != EINPROGRESS) {
169 wpa_printf(MSG_DEBUG, "HTTP: Failed to connect: %s",
176 * Continue connecting in the background; eloop will call us
177 * once the connection is ready (or failed).
181 if (eloop_register_sock(c->sd, EVENT_TYPE_WRITE, http_client_tx_ready,
187 if (eloop_register_timeout(HTTP_CLIENT_TIMEOUT_SEC, 0,
188 http_client_timeout, c, NULL)) {
199 char * http_client_url_parse(const char *url, struct sockaddr_in *dst,
202 char *u, *addr, *port, *path;
208 os_memset(dst, 0, sizeof(*dst));
209 dst->sin_family = AF_INET;
211 path = os_strchr(addr, '/');
212 port = os_strchr(addr, ':');
216 *path = '\0'; /* temporary nul termination for address */
223 if (inet_aton(addr, &dst->sin_addr) == 0) {
224 /* TODO: name lookup */
225 wpa_printf(MSG_DEBUG, "HTTP: Unsupported address in URL '%s' "
226 "(addr='%s' port='%s')",
233 dst->sin_port = htons(atoi(port));
235 dst->sin_port = htons(80);
238 /* remove temporary nul termination for address */
248 struct http_client * http_client_url(const char *url,
249 struct wpabuf *req, size_t max_response,
250 void (*cb)(void *ctx,
251 struct http_client *c,
252 enum http_client_event event),
255 struct sockaddr_in dst;
256 struct http_client *c;
258 struct wpabuf *req_buf = NULL;
260 if (os_strncmp(url, "http://", 7) != 0)
262 u = http_client_url_parse(url, &dst, &path);
267 req_buf = wpabuf_alloc(os_strlen(url) + 1000);
268 if (req_buf == NULL) {
274 "GET %s HTTP/1.1\r\n"
275 "Cache-Control: no-cache\r\n"
276 "Pragma: no-cache\r\n"
277 "Accept: text/xml, application/xml\r\n"
278 "User-Agent: wpa_supplicant\r\n"
281 path, inet_ntoa(dst.sin_addr),
282 ntohs(dst.sin_port));
286 c = http_client_addr(&dst, req, max_response, cb, cb_ctx);
288 wpabuf_free(req_buf);
296 void http_client_free(struct http_client *c)
300 httpread_destroy(c->hread);
303 eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
306 eloop_cancel_timeout(http_client_timeout, c, NULL);
311 struct wpabuf * http_client_get_body(struct http_client *c)
313 if (c->hread == NULL)
315 wpabuf_set(&c->body, httpread_data_get(c->hread),
316 httpread_length_get(c->hread));
321 char * http_client_get_hdr_line(struct http_client *c, const char *tag)
323 if (c->hread == NULL)
325 return httpread_hdr_line_get(c->hread, tag);
329 char * http_link_update(char *url, const char *base)
335 /* RFC 2396, Chapter 5.2 */
336 /* TODO: consider adding all cases described in RFC 2396 */
341 if (os_strncmp(url, "http://", 7) == 0)
342 return url; /* absolute link */
344 if (os_strncmp(base, "http://", 7) != 0)
345 return url; /* unable to handle base URL */
347 len = os_strlen(url) + 1 + os_strlen(base) + 1;
350 return url; /* failed */
353 pos = os_strchr(base + 7, '/');
355 os_snprintf(n, len, "%s%s", base, url);
357 os_memcpy(n, base, pos - base);
358 os_memcpy(n + (pos - base), url, os_strlen(url) + 1);
361 pos = os_strrchr(base + 7, '/');
363 os_snprintf(n, len, "%s/%s", base, url);
365 os_memcpy(n, base, pos - base + 1);
366 os_memcpy(n + (pos - base) + 1, url, os_strlen(url) +