WPS: Add HTTP client module to clean up code
Instead of implementing HTTP client functionality inside wps_upnp_event.c, use a generic HTTP client module to do this. The HTTP client code can now be shared more easily for other purposes, too.
This commit is contained in:
Jouni Malinen
parent
b02ee4a228
commit
092794f480
5 changed files with 399 additions and 181 deletions
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@ -310,6 +310,7 @@ OBJS += ../src/wps/wps_upnp_ssdp.o
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OBJS += ../src/wps/wps_upnp_web.o
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OBJS += ../src/wps/wps_upnp_event.o
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OBJS += ../src/wps/httpread.o
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OBJS += ../src/wps/http_client.o
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endif
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endif
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299
src/wps/http_client.c
Normal file
299
src/wps/http_client.c
Normal file
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@ -0,0 +1,299 @@
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/**
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* http_client - HTTP client
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*
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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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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include <fcntl.h>
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#include "common.h"
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#include "eloop.h"
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#include "httpread.h"
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#include "http_client.h"
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#define HTTP_CLIENT_TIMEOUT 30
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struct http_client {
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struct sockaddr_in dst;
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int sd;
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struct wpabuf *req;
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size_t req_pos;
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size_t max_response;
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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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void *cb_ctx;
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struct httpread *hread;
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struct wpabuf body;
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};
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static void http_client_timeout(void *eloop_data, void *user_ctx)
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{
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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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}
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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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{
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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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switch (e) {
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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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{
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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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"%s:%d",
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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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} else {
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wpa_printf(MSG_DEBUG, "HTTP: Error %d from "
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"%s:%d", reply_code,
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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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}
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} else
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c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY);
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break;
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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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break;
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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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break;
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}
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}
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static void http_client_tx_ready(int sock, void *eloop_ctx, void *sock_ctx)
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{
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struct http_client *c = eloop_ctx;
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int res;
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wpa_printf(MSG_DEBUG, "HTTP: Send client request to %s:%d (%lu of %lu "
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"bytes remaining)",
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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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if (res < 0) {
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wpa_printf(MSG_DEBUG, "HTTP: Failed to send buffer: %s",
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strerror(errno));
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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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return;
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}
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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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"remaining",
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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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res);
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c->req_pos += res;
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return;
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}
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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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wpabuf_free(c->req);
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c->req = NULL;
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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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return;
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}
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}
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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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void *cb_ctx)
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{
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struct http_client *c;
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c = os_zalloc(sizeof(*c));
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if (c == NULL)
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return NULL;
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c->sd = -1;
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c->dst = *dst;
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c->max_response = max_response;
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c->cb = cb;
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c->cb_ctx = cb_ctx;
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c->sd = socket(AF_INET, SOCK_STREAM, 0);
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if (c->sd < 0) {
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http_client_free(c);
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return NULL;
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}
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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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strerror(errno));
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http_client_free(c);
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return NULL;
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}
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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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strerror(errno));
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http_client_free(c);
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return NULL;
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}
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/*
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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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*/
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}
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if (eloop_register_sock(c->sd, EVENT_TYPE_WRITE, http_client_tx_ready,
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c, NULL)) {
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http_client_free(c);
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return NULL;
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}
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if (eloop_register_timeout(HTTP_CLIENT_TIMEOUT, 0, http_client_timeout,
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c, NULL)) {
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http_client_free(c);
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return NULL;
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}
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c->req = req;
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return c;
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}
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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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void *cb_ctx)
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{
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struct sockaddr_in dst;
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struct http_client *c;
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char *u, *addr, *port, *path;
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struct wpabuf *req_buf = NULL;
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if (os_strncmp(url, "http://", 7) != 0)
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return NULL;
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u = os_strdup(url);
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if (u == NULL)
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return NULL;
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os_memset(&dst, 0, sizeof(dst));
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dst.sin_family = AF_INET;
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addr = u + 7;
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path = os_strchr(addr, '/');
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port = os_strchr(addr, ':');
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if (path == NULL) {
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path = "/";
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} else {
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*path = '\0'; /* temporary nul termination for address */
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if (port > path)
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port = NULL;
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}
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if (port)
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*port++ = '\0';
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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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url, addr, port);
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os_free(u);
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return NULL;
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}
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if (port)
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dst.sin_port = htons(atoi(port));
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else
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dst.sin_port = htons(80);
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if (*path == '\0') {
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/* remove temporary nul termination for address */
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*path = '/';
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}
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if (req == NULL) {
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req_buf = wpabuf_alloc(os_strlen(url) + 1000);
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if (req_buf == NULL) {
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os_free(u);
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return NULL;
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}
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req = req_buf;
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wpabuf_printf(req,
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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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"Host: %s:%d\r\n"
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"\r\n",
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path, inet_ntoa(dst.sin_addr),
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ntohs(dst.sin_port));
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}
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os_free(u);
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c = http_client_addr(&dst, req, max_response, cb, cb_ctx);
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if (c == NULL) {
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wpabuf_free(req_buf);
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return NULL;
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}
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return c;
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}
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void http_client_free(struct http_client *c)
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{
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if (c == NULL)
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return;
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httpread_destroy(c->hread);
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wpabuf_free(c->req);
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if (c->sd >= 0) {
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eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE);
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close(c->sd);
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}
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eloop_cancel_timeout(http_client_timeout, c, NULL);
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os_free(c);
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}
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struct wpabuf * http_client_get_body(struct http_client *c)
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{
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if (c->hread == NULL)
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return 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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return &c->body;
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}
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42
src/wps/http_client.h
Normal file
42
src/wps/http_client.h
Normal file
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@ -0,0 +1,42 @@
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/**
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* http_client - HTTP client
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*
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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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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef HTTP_CLIENT_H
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#define HTTP_CLIENT_H
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struct http_client;
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enum http_client_event {
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HTTP_CLIENT_FAILED,
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HTTP_CLIENT_TIMEOUT,
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HTTP_CLIENT_OK,
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HTTP_CLIENT_INVALID_REPLY,
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};
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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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void *cb_ctx);
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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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void *cb_ctx);
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void http_client_free(struct http_client *c);
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struct wpabuf * http_client_get_body(struct http_client *c);
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#endif /* HTTP_CLIENT_H */
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@ -10,12 +10,11 @@
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#include "includes.h"
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#include <assert.h>
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#include <fcntl.h>
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#include "common.h"
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#include "eloop.h"
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#include "uuid.h"
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#include "httpread.h"
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#include "http_client.h"
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#include "wps_defs.h"
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#include "wps_upnp.h"
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#include "wps_upnp_i.h"
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@ -54,35 +53,19 @@ struct wps_event_ {
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int retry; /* which retry */
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struct subscr_addr *addr; /* address to connect to */
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struct wpabuf *data; /* event data to send */
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/* The following apply while we are sending an event message. */
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int sd; /* -1 or socket descriptor for open connection */
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int sd_registered; /* nonzero if we must cancel registration */
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struct httpread *hread; /* NULL or open connection for event msg */
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struct http_client *http_event;
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};
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static void event_timeout_handler(void *eloop_data, void *user_ctx);
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/* event_clean -- clean sockets etc. of event
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* Leaves data, retry count etc. alone.
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*/
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static void event_clean(struct wps_event_ *e)
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{
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if (e->s->current_event == e) {
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eloop_cancel_timeout(event_timeout_handler, NULL, e);
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if (e->s->current_event == e)
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e->s->current_event = NULL;
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}
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if (e->sd_registered) {
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eloop_unregister_sock(e->sd, EVENT_TYPE_WRITE);
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e->sd_registered = 0;
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}
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if (e->sd != -1) {
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close(e->sd);
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e->sd = -1;
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}
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if (e->hread)
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httpread_destroy(e->hread);
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e->hread = NULL;
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http_client_free(e->http_event);
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e->http_event = NULL;
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}
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@ -197,104 +180,14 @@ static void event_retry(struct wps_event_ *e, int do_next_address)
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}
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/* called if the overall event-sending process takes too long */
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static void event_timeout_handler(void *eloop_data, void *user_ctx)
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static struct wpabuf * event_build_message(struct wps_event_ *e)
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{
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struct wps_event_ *e = user_ctx;
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struct subscription *s = e->s;
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assert(e == s->current_event);
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wpa_printf(MSG_DEBUG, "WPS UPnP: Event send timeout");
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event_retry(e, 1);
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}
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/* event_got_response_handler -- called back when http response is received. */
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static void event_got_response_handler(struct httpread *handle, void *cookie,
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enum httpread_event en)
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{
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struct wps_event_ *e = cookie;
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struct subscription *s = e->s;
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struct upnp_wps_device_sm *sm = s->sm;
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struct httpread *hread = e->hread;
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int reply_code = 0;
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assert(e == s->current_event);
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eloop_cancel_timeout(event_timeout_handler, NULL, e);
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if (en == HTTPREAD_EVENT_FILE_READY) {
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if (httpread_hdr_type_get(hread) == HTTPREAD_HDR_TYPE_REPLY) {
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reply_code = httpread_reply_code_get(hread);
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if (reply_code == HTTP_OK) {
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wpa_printf(MSG_DEBUG,
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"WPS UPnP: Got event reply OK from "
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"%s", e->addr->domain_and_port);
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event_delete(e);
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goto send_more;
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} else {
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wpa_printf(MSG_DEBUG, "WPS UPnP: Got event "
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"error reply code %d from %s",
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reply_code,
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e->addr->domain_and_port);
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goto bad;
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}
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} else {
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wpa_printf(MSG_DEBUG, "WPS UPnP: Got bogus event "
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"response %d from %s", en,
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e->addr->domain_and_port);
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}
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} else {
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wpa_printf(MSG_DEBUG, "WPS UPnP: Event response timeout/fail "
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"for %s", e->addr->domain_and_port);
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goto bad;
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}
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event_retry(e, 1);
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goto send_more;
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send_more:
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/* Schedule sending more if there is more to send */
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if (s->event_queue)
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event_send_all_later(sm);
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return;
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bad:
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/*
|
||||
* If other side doesn't like what we say, forget about them.
|
||||
* (There is no way to tell other side that we are dropping
|
||||
* them...).
|
||||
* Alternately, we could just do event_delete(e)
|
||||
*/
|
||||
wpa_printf(MSG_DEBUG, "WPS UPnP: Deleting subscription due to errors");
|
||||
subscription_unlink(s);
|
||||
subscription_destroy(s);
|
||||
}
|
||||
|
||||
|
||||
/* event_send_tx_ready -- actually write event message
|
||||
*
|
||||
* Prequisite: subscription socket descriptor has become ready to
|
||||
* write (because connection to subscriber has been made).
|
||||
*
|
||||
* It is also possible that we are called because the connect has failed;
|
||||
* it is possible to test for this, or we can just go ahead and then
|
||||
* the write will fail.
|
||||
*/
|
||||
static void event_send_tx_ready(int sock, void *eloop_ctx, void *sock_ctx)
|
||||
{
|
||||
struct wps_event_ *e = sock_ctx;
|
||||
struct subscription *s = e->s;
|
||||
struct wpabuf *buf;
|
||||
char *b;
|
||||
|
||||
assert(e == s->current_event);
|
||||
assert(e->sd == sock);
|
||||
|
||||
buf = wpabuf_alloc(1000 + wpabuf_len(e->data));
|
||||
if (buf == NULL) {
|
||||
event_retry(e, 0);
|
||||
goto bad;
|
||||
}
|
||||
if (buf == NULL)
|
||||
return NULL;
|
||||
wpabuf_printf(buf, "NOTIFY %s HTTP/1.1\r\n", e->addr->path);
|
||||
wpabuf_put_str(buf, "SERVER: Unspecified, UPnP/1.0, Unspecified\r\n");
|
||||
wpabuf_printf(buf, "HOST: %s\r\n", e->addr->domain_and_port);
|
||||
|
|
@ -303,7 +196,7 @@ static void event_send_tx_ready(int sock, void *eloop_ctx, void *sock_ctx)
|
|||
"NTS: upnp:propchange\r\n");
|
||||
wpabuf_put_str(buf, "SID: uuid:");
|
||||
b = wpabuf_put(buf, 0);
|
||||
uuid_bin2str(s->uuid, b, 80);
|
||||
uuid_bin2str(e->s->uuid, b, 80);
|
||||
wpabuf_put(buf, os_strlen(b));
|
||||
wpabuf_put_str(buf, "\r\n");
|
||||
wpabuf_printf(buf, "SEQ: %u\r\n", e->subscriber_sequence);
|
||||
|
|
@ -311,45 +204,47 @@ static void event_send_tx_ready(int sock, void *eloop_ctx, void *sock_ctx)
|
|||
(int) wpabuf_len(e->data));
|
||||
wpabuf_put_str(buf, "\r\n"); /* terminating empty line */
|
||||
wpabuf_put_buf(buf, e->data);
|
||||
return buf;
|
||||
}
|
||||
|
||||
/* Since the message size is pretty small, we should be
|
||||
* able to get the operating system to buffer what we give it
|
||||
* and not have to come back again later to write more...
|
||||
*/
|
||||
#if 0
|
||||
/* we could: Turn blocking back on? */
|
||||
fcntl(e->sd, F_SETFL, 0);
|
||||
#endif
|
||||
wpa_printf(MSG_DEBUG, "WPS UPnP: Sending event to %s",
|
||||
e->addr->domain_and_port);
|
||||
if (send_wpabuf(e->sd, buf) < 0) {
|
||||
event_retry(e, 1);
|
||||
goto bad;
|
||||
}
|
||||
wpabuf_free(buf);
|
||||
buf = NULL;
|
||||
|
||||
if (e->sd_registered) {
|
||||
e->sd_registered = 0;
|
||||
eloop_unregister_sock(e->sd, EVENT_TYPE_WRITE);
|
||||
}
|
||||
/* Set up to read the reply */
|
||||
e->hread = httpread_create(e->sd, event_got_response_handler,
|
||||
e /* cookie */,
|
||||
0 /* no data expected */,
|
||||
EVENT_TIMEOUT_SEC);
|
||||
if (e->hread == NULL) {
|
||||
wpa_printf(MSG_ERROR, "WPS UPnP: httpread_create failed");
|
||||
event_retry(e, 0);
|
||||
goto bad;
|
||||
}
|
||||
return;
|
||||
static void event_http_cb(void *ctx, struct http_client *c,
|
||||
enum http_client_event event)
|
||||
{
|
||||
struct wps_event_ *e = ctx;
|
||||
struct subscription *s = e->s;
|
||||
|
||||
switch (event) {
|
||||
case HTTP_CLIENT_OK:
|
||||
wpa_printf(MSG_DEBUG,
|
||||
"WPS UPnP: Got event reply OK from "
|
||||
"%s", e->addr->domain_and_port);
|
||||
event_delete(e);
|
||||
|
||||
bad:
|
||||
/* Schedule sending more if there is more to send */
|
||||
if (s->event_queue)
|
||||
event_send_all_later(s->sm);
|
||||
wpabuf_free(buf);
|
||||
break;
|
||||
case HTTP_CLIENT_FAILED:
|
||||
case HTTP_CLIENT_INVALID_REPLY:
|
||||
wpa_printf(MSG_DEBUG, "WPS UPnP: Failed to send event to %s",
|
||||
e->addr->domain_and_port);
|
||||
|
||||
/*
|
||||
* If other side doesn't like what we say, forget about them.
|
||||
* (There is no way to tell other side that we are dropping
|
||||
* them...).
|
||||
* Alternately, we could just do event_delete(e)
|
||||
*/
|
||||
wpa_printf(MSG_DEBUG, "WPS UPnP: Deleting subscription due to "
|
||||
"errors");
|
||||
subscription_unlink(s);
|
||||
subscription_destroy(s);
|
||||
break;
|
||||
case HTTP_CLIENT_TIMEOUT:
|
||||
wpa_printf(MSG_DEBUG, "WPS UPnP: Event send timeout");
|
||||
event_retry(e, 1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -377,6 +272,7 @@ static int event_send_start(struct subscription *s)
|
|||
{
|
||||
struct wps_event_ *e;
|
||||
int itry;
|
||||
struct wpabuf *buf;
|
||||
|
||||
/*
|
||||
* Assume we are called ONLY with no current event and ONLY with
|
||||
|
|
@ -393,40 +289,20 @@ static int event_send_start(struct subscription *s)
|
|||
for (itry = 0; itry < e->retry; itry++)
|
||||
e->addr = e->addr->next;
|
||||
|
||||
e->sd = socket(AF_INET, SOCK_STREAM, 0);
|
||||
if (e->sd < 0) {
|
||||
buf = event_build_message(e);
|
||||
if (buf == NULL) {
|
||||
event_retry(e, 0);
|
||||
return -1;
|
||||
}
|
||||
/* set non-blocking so we don't sleep waiting for connection */
|
||||
if (fcntl(e->sd, F_SETFL, O_NONBLOCK) != 0) {
|
||||
event_retry(e, 0);
|
||||
return -1;
|
||||
}
|
||||
/*
|
||||
* Start the connect. It might succeed immediately but more likely will
|
||||
* return errno EINPROGRESS.
|
||||
*/
|
||||
if (connect(e->sd, (struct sockaddr *) &e->addr->saddr,
|
||||
sizeof(e->addr->saddr))) {
|
||||
if (errno != EINPROGRESS) {
|
||||
event_retry(e, 1);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
/* Call back when ready for writing (or on failure...). */
|
||||
if (eloop_register_sock(e->sd, EVENT_TYPE_WRITE, event_send_tx_ready,
|
||||
NULL, e)) {
|
||||
event_retry(e, 0);
|
||||
return -1;
|
||||
}
|
||||
e->sd_registered = 1;
|
||||
/* Don't wait forever! */
|
||||
if (eloop_register_timeout(EVENT_TIMEOUT_SEC, 0, event_timeout_handler,
|
||||
NULL, e)) {
|
||||
|
||||
e->http_event = http_client_addr(&e->addr->saddr, buf, 0,
|
||||
event_http_cb, e);
|
||||
if (e->http_event == NULL) {
|
||||
wpabuf_free(buf);
|
||||
event_retry(e, 0);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -519,7 +395,6 @@ int event_add(struct subscription *s, const struct wpabuf *data)
|
|||
if (e == NULL)
|
||||
return 1;
|
||||
e->s = s;
|
||||
e->sd = -1;
|
||||
e->data = wpabuf_dup(data);
|
||||
if (e->data == NULL) {
|
||||
os_free(e);
|
||||
|
|
|
|||
|
|
@ -510,6 +510,7 @@ OBJS += ../src/wps/wps_upnp_ssdp.o
|
|||
OBJS += ../src/wps/wps_upnp_web.o
|
||||
OBJS += ../src/wps/wps_upnp_event.o
|
||||
OBJS += ../src/wps/httpread.o
|
||||
OBJS += ../src/wps/http_client.o
|
||||
endif
|
||||
|
||||
endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue