2 * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file http_send.c paraslash's http sender */
15 #include "server.cmdline.h"
23 #include "close_on_fork.h"
26 #include "chunk_queue.h"
29 /** Message sent to clients that do not send a valid get request. */
30 #define HTTP_ERR_MSG "HTTP/1.0 400 Bad Request\n"
32 /** The possible states of a client from the server's POV. */
33 enum http_client_status {
34 /** We accepted the connection on the tcp socket. */
36 /** Successfully received the get request. */
38 /** Connection is ready for sending audio data. */
40 /** We didn't receive a valid get request. */
41 HTTP_INVALID_GET_REQUEST
44 struct private_http_sender_data {
45 enum http_client_status status;
48 static struct sender_status http_sender_status, *hss = &http_sender_status;
50 static int http_send_msg(struct sender_client *sc, const char *msg)
52 int ret = send_buffer(sc->fd, msg);
55 shutdown_client(sc, hss);
59 static void http_send_ok_msg(struct sender_client *sc)
61 PARA_INFO_LOG("sending http ok message to fd %d\n", sc->fd);
62 http_send_msg(sc, HTTP_OK_MSG);
65 static int http_send_err_msg(struct sender_client *sc)
67 PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc->fd);
68 return http_send_msg(sc, HTTP_ERR_MSG);
71 static void http_shutdown_clients(void)
73 shutdown_clients(hss);
76 static void http_send(long unsigned current_chunk,
77 __a_unused long unsigned chunks_sent, const char *buf, size_t len)
79 struct sender_client *sc, *tmp;
81 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
82 struct private_http_sender_data *phsd = sc->private_data;
83 if (phsd->status != HTTP_STREAMING)
85 send_chunk(sc, hss, 0, current_chunk, buf, len);
89 static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
91 struct sender_client *sc, *tmp;
92 struct private_http_sender_data *phsd;
94 if (hss->listen_fd < 0)
96 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
97 phsd = sc->private_data;
98 switch (phsd->status) {
99 case HTTP_STREAMING: /* nothing to do */
101 case HTTP_CONNECTED: /* need to recv get request */
102 if (FD_ISSET(sc->fd, rfds)) {
103 if (recv_pattern(sc->fd, HTTP_GET_MSG, MAXLINE)
105 phsd->status = HTTP_INVALID_GET_REQUEST;
107 phsd->status = HTTP_GOT_GET_REQUEST;
108 PARA_INFO_LOG("received get request\n");
112 case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
113 phsd->status = HTTP_STREAMING;
114 http_send_ok_msg(sc);
116 case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
117 if (http_send_err_msg(sc) >= 0)
118 shutdown_client(sc, hss);
122 if (!FD_ISSET(hss->listen_fd, rfds))
124 sc = accept_sender_client(hss);
127 phsd = para_malloc(sizeof(*phsd));
128 sc->private_data = phsd;
129 phsd->status = HTTP_CONNECTED;
132 static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
134 struct sender_client *sc, *tmp;
136 if (hss->listen_fd < 0)
138 para_fd_set(hss->listen_fd, rfds, max_fileno);
139 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
140 struct private_http_sender_data *phsd = sc->private_data;
141 if (phsd->status == HTTP_CONNECTED) /* need to recv get request */
142 para_fd_set(sc->fd, rfds, max_fileno);
146 static int http_com_on(__a_unused struct sender_command_data *scd)
148 return generic_com_on(hss, IPPROTO_TCP);
151 static int http_com_off(__a_unused struct sender_command_data *scd)
153 generic_com_off(hss);
157 static int http_com_deny(struct sender_command_data *scd)
159 generic_com_deny(scd, hss);
163 static int http_com_allow(struct sender_command_data *scd)
165 generic_com_allow(scd, hss);
169 static char *http_info(void)
171 return get_sender_info(hss, "http");
175 * The init function of the http sender.
177 * \param s Pointer to the http sender struct.
179 * It initializes all function pointers of \a s, the client list and the access
180 * control list. If the autostart option was given, the tcp port is opened.
182 void http_send_init(struct sender *s)
187 s->pre_select = http_pre_select;
188 s->post_select = http_post_select;
189 s->shutdown_clients = http_shutdown_clients;
190 s->help = generic_sender_help;
191 s->client_cmds[SENDER_ON] = http_com_on;
192 s->client_cmds[SENDER_OFF] = http_com_off;
193 s->client_cmds[SENDER_DENY] = http_com_deny;
194 s->client_cmds[SENDER_ALLOW] = http_com_allow;
195 s->client_cmds[SENDER_ADD] = NULL;
196 s->client_cmds[SENDER_DELETE] = NULL;
198 init_sender_status(hss, conf.http_access_arg, conf.http_access_given,
199 conf.http_port_arg, conf.http_max_clients_arg,
200 conf.http_default_deny_given);
201 if (conf.http_no_autostart_given)
203 ret = generic_com_on(hss, IPPROTO_TCP);
205 PARA_ERROR_LOG("%s\n", para_strerror(-ret));