1214501Srpaulo/* 2214501Srpaulo * http_server - HTTP server 3214501Srpaulo * Copyright (c) 2009, Jouni Malinen <j@w1.fi> 4214501Srpaulo * 5214501Srpaulo * This program is free software; you can redistribute it and/or modify 6214501Srpaulo * it under the terms of the GNU General Public License version 2 as 7214501Srpaulo * published by the Free Software Foundation. 8214501Srpaulo * 9214501Srpaulo * Alternatively, this software may be distributed under the terms of BSD 10214501Srpaulo * license. 11214501Srpaulo * 12214501Srpaulo * See README and COPYING for more details. 13214501Srpaulo */ 14214501Srpaulo 15214501Srpaulo#include "includes.h" 16214501Srpaulo#include <fcntl.h> 17214501Srpaulo 18214501Srpaulo#include "common.h" 19214501Srpaulo#include "eloop.h" 20214501Srpaulo#include "httpread.h" 21214501Srpaulo#include "http_server.h" 22214501Srpaulo 23214501Srpaulo#define HTTP_SERVER_TIMEOUT 30 24214501Srpaulo#define HTTP_SERVER_MAX_REQ_LEN 8000 25214501Srpaulo#define HTTP_SERVER_MAX_CONNECTIONS 10 26214501Srpaulo 27214501Srpaulostruct http_request { 28214501Srpaulo struct http_request *next; 29214501Srpaulo struct http_server *srv; 30214501Srpaulo int fd; 31214501Srpaulo struct sockaddr_in cli; 32214501Srpaulo struct httpread *hread; 33214501Srpaulo}; 34214501Srpaulo 35214501Srpaulostruct http_server { 36214501Srpaulo void (*cb)(void *ctx, struct http_request *req); 37214501Srpaulo void *cb_ctx; 38214501Srpaulo 39214501Srpaulo int fd; 40214501Srpaulo int port; 41214501Srpaulo 42214501Srpaulo struct http_request *requests; 43214501Srpaulo unsigned int request_count; 44214501Srpaulo}; 45214501Srpaulo 46214501Srpaulo 47214501Srpaulostatic void http_request_cb(struct httpread *handle, void *cookie, 48214501Srpaulo enum httpread_event en) 49214501Srpaulo{ 50214501Srpaulo struct http_request *req = cookie; 51214501Srpaulo struct http_server *srv = req->srv; 52214501Srpaulo 53214501Srpaulo if (en == HTTPREAD_EVENT_FILE_READY) { 54214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Request from %s:%d received", 55214501Srpaulo inet_ntoa(req->cli.sin_addr), 56214501Srpaulo ntohs(req->cli.sin_port)); 57214501Srpaulo srv->cb(srv->cb_ctx, req); 58214501Srpaulo return; 59214501Srpaulo } 60214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Request from %s:%d could not be received " 61214501Srpaulo "completely", inet_ntoa(req->cli.sin_addr), 62214501Srpaulo ntohs(req->cli.sin_port)); 63214501Srpaulo http_request_deinit(req); 64214501Srpaulo} 65214501Srpaulo 66214501Srpaulo 67214501Srpaulostatic struct http_request * http_request_init(struct http_server *srv, int fd, 68214501Srpaulo struct sockaddr_in *cli) 69214501Srpaulo{ 70214501Srpaulo struct http_request *req; 71214501Srpaulo 72214501Srpaulo if (srv->request_count >= HTTP_SERVER_MAX_CONNECTIONS) { 73214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Too many concurrent requests"); 74214501Srpaulo return NULL; 75214501Srpaulo } 76214501Srpaulo 77214501Srpaulo req = os_zalloc(sizeof(*req)); 78214501Srpaulo if (req == NULL) 79214501Srpaulo return NULL; 80214501Srpaulo 81214501Srpaulo req->srv = srv; 82214501Srpaulo req->fd = fd; 83214501Srpaulo req->cli = *cli; 84214501Srpaulo 85214501Srpaulo req->hread = httpread_create(req->fd, http_request_cb, req, 86214501Srpaulo HTTP_SERVER_MAX_REQ_LEN, 87214501Srpaulo HTTP_SERVER_TIMEOUT); 88214501Srpaulo if (req->hread == NULL) { 89214501Srpaulo http_request_deinit(req); 90214501Srpaulo return NULL; 91214501Srpaulo } 92214501Srpaulo 93214501Srpaulo return req; 94214501Srpaulo} 95214501Srpaulo 96214501Srpaulo 97214501Srpaulovoid http_request_deinit(struct http_request *req) 98214501Srpaulo{ 99214501Srpaulo struct http_request *r, *p; 100214501Srpaulo struct http_server *srv; 101214501Srpaulo 102214501Srpaulo if (req == NULL) 103214501Srpaulo return; 104214501Srpaulo 105214501Srpaulo srv = req->srv; 106214501Srpaulo p = NULL; 107214501Srpaulo r = srv->requests; 108214501Srpaulo while (r) { 109214501Srpaulo if (r == req) { 110214501Srpaulo if (p) 111214501Srpaulo p->next = r->next; 112214501Srpaulo else 113214501Srpaulo srv->requests = r->next; 114214501Srpaulo srv->request_count--; 115214501Srpaulo break; 116214501Srpaulo } 117214501Srpaulo p = r; 118214501Srpaulo r = r->next; 119214501Srpaulo } 120214501Srpaulo 121214501Srpaulo httpread_destroy(req->hread); 122214501Srpaulo close(req->fd); 123214501Srpaulo os_free(req); 124214501Srpaulo} 125214501Srpaulo 126214501Srpaulo 127214501Srpaulostatic void http_request_free_all(struct http_request *req) 128214501Srpaulo{ 129214501Srpaulo struct http_request *prev; 130214501Srpaulo while (req) { 131214501Srpaulo prev = req; 132214501Srpaulo req = req->next; 133214501Srpaulo http_request_deinit(prev); 134214501Srpaulo } 135214501Srpaulo} 136214501Srpaulo 137214501Srpaulo 138214501Srpaulovoid http_request_send(struct http_request *req, struct wpabuf *resp) 139214501Srpaulo{ 140214501Srpaulo int res; 141214501Srpaulo 142214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Send %lu byte response to %s:%d", 143214501Srpaulo (unsigned long) wpabuf_len(resp), 144214501Srpaulo inet_ntoa(req->cli.sin_addr), 145214501Srpaulo ntohs(req->cli.sin_port)); 146214501Srpaulo 147214501Srpaulo res = send(req->fd, wpabuf_head(resp), wpabuf_len(resp), 0); 148214501Srpaulo if (res < 0) { 149214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Send failed: %s", 150214501Srpaulo strerror(errno)); 151214501Srpaulo } else if ((size_t) res < wpabuf_len(resp)) { 152214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Sent only %d of %lu bytes", 153214501Srpaulo res, (unsigned long) wpabuf_len(resp)); 154214501Srpaulo /* TODO: add eloop handler for sending rest of the data */ 155214501Srpaulo } 156214501Srpaulo 157214501Srpaulo wpabuf_free(resp); 158214501Srpaulo} 159214501Srpaulo 160214501Srpaulo 161214501Srpaulovoid http_request_send_and_deinit(struct http_request *req, 162214501Srpaulo struct wpabuf *resp) 163214501Srpaulo{ 164214501Srpaulo http_request_send(req, resp); 165214501Srpaulo http_request_deinit(req); 166214501Srpaulo} 167214501Srpaulo 168214501Srpaulo 169214501Srpauloenum httpread_hdr_type http_request_get_type(struct http_request *req) 170214501Srpaulo{ 171214501Srpaulo return httpread_hdr_type_get(req->hread); 172214501Srpaulo} 173214501Srpaulo 174214501Srpaulo 175214501Srpaulochar * http_request_get_uri(struct http_request *req) 176214501Srpaulo{ 177214501Srpaulo return httpread_uri_get(req->hread); 178214501Srpaulo} 179214501Srpaulo 180214501Srpaulo 181214501Srpaulochar * http_request_get_hdr(struct http_request *req) 182214501Srpaulo{ 183214501Srpaulo return httpread_hdr_get(req->hread); 184214501Srpaulo} 185214501Srpaulo 186214501Srpaulo 187214501Srpaulochar * http_request_get_data(struct http_request *req) 188214501Srpaulo{ 189214501Srpaulo return httpread_data_get(req->hread); 190214501Srpaulo} 191214501Srpaulo 192214501Srpaulo 193214501Srpaulochar * http_request_get_hdr_line(struct http_request *req, const char *tag) 194214501Srpaulo{ 195214501Srpaulo return httpread_hdr_line_get(req->hread, tag); 196214501Srpaulo} 197214501Srpaulo 198214501Srpaulo 199214501Srpaulostruct sockaddr_in * http_request_get_cli_addr(struct http_request *req) 200214501Srpaulo{ 201214501Srpaulo return &req->cli; 202214501Srpaulo} 203214501Srpaulo 204214501Srpaulo 205214501Srpaulostatic void http_server_cb(int sd, void *eloop_ctx, void *sock_ctx) 206214501Srpaulo{ 207214501Srpaulo struct sockaddr_in addr; 208214501Srpaulo socklen_t addr_len = sizeof(addr); 209214501Srpaulo struct http_server *srv = eloop_ctx; 210214501Srpaulo int conn; 211214501Srpaulo struct http_request *req; 212214501Srpaulo 213214501Srpaulo conn = accept(srv->fd, (struct sockaddr *) &addr, &addr_len); 214214501Srpaulo if (conn < 0) { 215214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Failed to accept new connection: " 216214501Srpaulo "%s", strerror(errno)); 217214501Srpaulo return; 218214501Srpaulo } 219214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Connection from %s:%d", 220214501Srpaulo inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); 221214501Srpaulo 222214501Srpaulo req = http_request_init(srv, conn, &addr); 223214501Srpaulo if (req == NULL) { 224214501Srpaulo close(conn); 225214501Srpaulo return; 226214501Srpaulo } 227214501Srpaulo 228214501Srpaulo req->next = srv->requests; 229214501Srpaulo srv->requests = req; 230214501Srpaulo srv->request_count++; 231214501Srpaulo} 232214501Srpaulo 233214501Srpaulo 234214501Srpaulostruct http_server * http_server_init(struct in_addr *addr, int port, 235214501Srpaulo void (*cb)(void *ctx, 236214501Srpaulo struct http_request *req), 237214501Srpaulo void *cb_ctx) 238214501Srpaulo{ 239214501Srpaulo struct sockaddr_in sin; 240214501Srpaulo struct http_server *srv; 241214501Srpaulo 242214501Srpaulo srv = os_zalloc(sizeof(*srv)); 243214501Srpaulo if (srv == NULL) 244214501Srpaulo return NULL; 245214501Srpaulo srv->cb = cb; 246214501Srpaulo srv->cb_ctx = cb_ctx; 247214501Srpaulo 248214501Srpaulo srv->fd = socket(AF_INET, SOCK_STREAM, 0); 249214501Srpaulo if (srv->fd < 0) 250214501Srpaulo goto fail; 251214501Srpaulo if (fcntl(srv->fd, F_SETFL, O_NONBLOCK) < 0) 252214501Srpaulo goto fail; 253214501Srpaulo if (port < 0) 254214501Srpaulo srv->port = 49152; 255214501Srpaulo else 256214501Srpaulo srv->port = port; 257214501Srpaulo 258214501Srpaulo os_memset(&sin, 0, sizeof(sin)); 259214501Srpaulo sin.sin_family = AF_INET; 260214501Srpaulo sin.sin_addr.s_addr = addr->s_addr; 261214501Srpaulo 262214501Srpaulo for (;;) { 263214501Srpaulo sin.sin_port = htons(srv->port); 264214501Srpaulo if (bind(srv->fd, (struct sockaddr *) &sin, sizeof(sin)) == 0) 265214501Srpaulo break; 266214501Srpaulo if (errno == EADDRINUSE) { 267214501Srpaulo /* search for unused port */ 268214501Srpaulo if (++srv->port == 65535 || port >= 0) 269214501Srpaulo goto fail; 270214501Srpaulo continue; 271214501Srpaulo } 272214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Failed to bind server port %d: " 273214501Srpaulo "%s", srv->port, strerror(errno)); 274214501Srpaulo goto fail; 275214501Srpaulo } 276214501Srpaulo if (listen(srv->fd, 10 /* max backlog */) < 0) 277214501Srpaulo goto fail; 278214501Srpaulo if (fcntl(srv->fd, F_SETFL, O_NONBLOCK) < 0) 279214501Srpaulo goto fail; 280214501Srpaulo if (eloop_register_sock(srv->fd, EVENT_TYPE_READ, http_server_cb, 281214501Srpaulo srv, NULL)) 282214501Srpaulo goto fail; 283214501Srpaulo 284214501Srpaulo wpa_printf(MSG_DEBUG, "HTTP: Started server on %s:%d", 285214501Srpaulo inet_ntoa(*addr), srv->port); 286214501Srpaulo 287214501Srpaulo return srv; 288214501Srpaulo 289214501Srpaulofail: 290214501Srpaulo http_server_deinit(srv); 291214501Srpaulo return NULL; 292214501Srpaulo} 293214501Srpaulo 294214501Srpaulo 295214501Srpaulovoid http_server_deinit(struct http_server *srv) 296214501Srpaulo{ 297214501Srpaulo if (srv == NULL) 298214501Srpaulo return; 299214501Srpaulo if (srv->fd >= 0) { 300214501Srpaulo eloop_unregister_sock(srv->fd, EVENT_TYPE_READ); 301214501Srpaulo close(srv->fd); 302214501Srpaulo } 303214501Srpaulo http_request_free_all(srv->requests); 304214501Srpaulo 305214501Srpaulo os_free(srv); 306214501Srpaulo} 307214501Srpaulo 308214501Srpaulo 309214501Srpauloint http_server_get_port(struct http_server *srv) 310214501Srpaulo{ 311214501Srpaulo return srv->port; 312214501Srpaulo} 313