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* http_client - HTTP client
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* Alternatively, this software may be distributed under the terms of BSD
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* See README and COPYING for more details.
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#include "http_client.h"
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#define HTTP_CLIENT_TIMEOUT 30
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struct sockaddr_in dst;
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void (*cb)(void *ctx, struct http_client *c,
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enum http_client_event event);
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struct httpread *hread;
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static void http_client_timeout(void *eloop_data, void *user_ctx)
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struct http_client *c = eloop_data;
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wpa_printf(MSG_DEBUG, "HTTP: Timeout");
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c->cb(c->cb_ctx, c, HTTP_CLIENT_TIMEOUT);
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static void http_client_got_response(struct httpread *handle, void *cookie,
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enum httpread_event e)
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struct http_client *c = cookie;
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eloop_cancel_timeout(http_client_timeout, c, NULL);
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case HTTPREAD_EVENT_FILE_READY:
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if (httpread_hdr_type_get(c->hread) == HTTPREAD_HDR_TYPE_REPLY)
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int reply_code = httpread_reply_code_get(c->hread);
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if (reply_code == 200 /* OK */) {
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wpa_printf(MSG_DEBUG, "HTTP: Response OK from "
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inet_ntoa(c->dst.sin_addr),
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ntohs(c->dst.sin_port));
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c->cb(c->cb_ctx, c, HTTP_CLIENT_OK);
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wpa_printf(MSG_DEBUG, "HTTP: Error %d from "
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inet_ntoa(c->dst.sin_addr),
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ntohs(c->dst.sin_port));
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c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY);
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c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY);
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case HTTPREAD_EVENT_TIMEOUT:
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c->cb(c->cb_ctx, c, HTTP_CLIENT_TIMEOUT);
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case HTTPREAD_EVENT_ERROR:
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c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED);
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static void http_client_tx_ready(int sock, void *eloop_ctx, void *sock_ctx)
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struct http_client *c = eloop_ctx;
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wpa_printf(MSG_DEBUG, "HTTP: Send client request to %s:%d (%lu of %lu "
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inet_ntoa(c->dst.sin_addr), ntohs(c->dst.sin_port),
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(unsigned long) wpabuf_len(c->req),
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(unsigned long) wpabuf_len(c->req) - c->req_pos);
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res = send(c->sd, wpabuf_head(c->req) + c->req_pos,
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wpabuf_len(c->req) - c->req_pos, 0);
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wpa_printf(MSG_DEBUG, "HTTP: Failed to send buffer: %s",
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eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
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c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED);
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if ((size_t) res < wpabuf_len(c->req) - c->req_pos) {
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wpa_printf(MSG_DEBUG, "HTTP: Sent %d of %lu bytes; %lu bytes "
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res, (unsigned long) wpabuf_len(c->req),
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(unsigned long) wpabuf_len(c->req) - c->req_pos -
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wpa_printf(MSG_DEBUG, "HTTP: Full client request sent to %s:%d",
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inet_ntoa(c->dst.sin_addr), ntohs(c->dst.sin_port));
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eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
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c->hread = httpread_create(c->sd, http_client_got_response, c,
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c->max_response, HTTP_CLIENT_TIMEOUT);
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if (c->hread == NULL) {
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c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED);
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struct http_client * http_client_addr(struct sockaddr_in *dst,
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struct wpabuf *req, size_t max_response,
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void (*cb)(void *ctx,
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struct http_client *c,
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enum http_client_event event),
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struct http_client *c;
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c = os_zalloc(sizeof(*c));
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c->max_response = max_response;
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c->sd = socket(AF_INET, SOCK_STREAM, 0);
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if (fcntl(c->sd, F_SETFL, O_NONBLOCK) != 0) {
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wpa_printf(MSG_DEBUG, "HTTP: fnctl(O_NONBLOCK) failed: %s",
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if (connect(c->sd, (struct sockaddr *) dst, sizeof(*dst))) {
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if (errno != EINPROGRESS) {
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wpa_printf(MSG_DEBUG, "HTTP: Failed to connect: %s",
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* Continue connecting in the background; eloop will call us
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* once the connection is ready (or failed).
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if (eloop_register_sock(c->sd, EVENT_TYPE_WRITE, http_client_tx_ready,
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if (eloop_register_timeout(HTTP_CLIENT_TIMEOUT, 0, http_client_timeout,
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char * http_client_url_parse(const char *url, struct sockaddr_in *dst,
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char *u, *addr, *port, *path;
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os_memset(dst, 0, sizeof(*dst));
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dst->sin_family = AF_INET;
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path = os_strchr(addr, '/');
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port = os_strchr(addr, ':');
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*path = '\0'; /* temporary nul termination for address */
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if (inet_aton(addr, &dst->sin_addr) == 0) {
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/* TODO: name lookup */
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wpa_printf(MSG_DEBUG, "HTTP: Unsupported address in URL '%s' "
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"(addr='%s' port='%s')",
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dst->sin_port = htons(atoi(port));
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dst->sin_port = htons(80);
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/* remove temporary nul termination for address */
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struct http_client * http_client_url(const char *url,
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struct wpabuf *req, size_t max_response,
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void (*cb)(void *ctx,
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struct http_client *c,
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enum http_client_event event),
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struct sockaddr_in dst;
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struct http_client *c;
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struct wpabuf *req_buf = NULL;
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if (os_strncmp(url, "http://", 7) != 0)
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u = http_client_url_parse(url, &dst, &path);
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req_buf = wpabuf_alloc(os_strlen(url) + 1000);
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if (req_buf == NULL) {
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"GET %s HTTP/1.1\r\n"
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"Cache-Control: no-cache\r\n"
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"Pragma: no-cache\r\n"
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"Accept: text/xml, application/xml\r\n"
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"User-Agent: wpa_supplicant\r\n"
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path, inet_ntoa(dst.sin_addr),
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ntohs(dst.sin_port));
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c = http_client_addr(&dst, req, max_response, cb, cb_ctx);
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wpabuf_free(req_buf);
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void http_client_free(struct http_client *c)
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httpread_destroy(c->hread);
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eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
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eloop_cancel_timeout(http_client_timeout, c, NULL);
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struct wpabuf * http_client_get_body(struct http_client *c)
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if (c->hread == NULL)
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wpabuf_set(&c->body, httpread_data_get(c->hread),
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httpread_length_get(c->hread));
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char * http_client_get_hdr_line(struct http_client *c, const char *tag)
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if (c->hread == NULL)
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return httpread_hdr_line_get(c->hread, tag);
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char * http_link_update(char *url, const char *base)
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/* RFC 2396, Chapter 5.2 */
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/* TODO: consider adding all cases described in RFC 2396 */
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if (os_strncmp(url, "http://", 7) == 0)
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return url; /* absolute link */
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if (os_strncmp(base, "http://", 7) != 0)
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return url; /* unable to handle base URL */
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len = os_strlen(url) + 1 + os_strlen(base) + 1;
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return url; /* failed */
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pos = os_strchr(base + 7, '/');
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os_snprintf(n, len, "%s%s", base, url);
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os_memcpy(n, base, pos - base);
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os_memcpy(n + (pos - base), url, os_strlen(url) + 1);
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pos = os_strrchr(base + 7, '/');
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os_snprintf(n, len, "%s/%s", base, url);
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os_memcpy(n, base, pos - base + 1);
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os_memcpy(n + (pos - base) + 1, url, os_strlen(url) +