2 * Copyright (C) 2005-2009 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 /** For each connected client, a structure of this type is maintained. */
45 struct private_http_sender_data {
46 /** The current state of this client. */
47 enum http_client_status status;
50 static struct sender_status http_sender_status, *hss = &http_sender_status;
52 static int http_send_msg(struct sender_client *sc, const char *msg)
54 int ret = send_buffer(sc->fd, msg);
57 shutdown_client(sc, hss);
61 static void http_send_ok_msg(struct sender_client *sc)
63 PARA_INFO_LOG("sending http ok message to fd %d\n", sc->fd);
64 http_send_msg(sc, HTTP_OK_MSG);
67 static int http_send_err_msg(struct sender_client *sc)
69 PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc->fd);
70 return http_send_msg(sc, HTTP_ERR_MSG);
73 static void http_shutdown_clients(void)
75 shutdown_clients(hss);
78 static void http_send(long unsigned current_chunk,
79 __a_unused long unsigned chunks_sent, const char *buf, size_t len,
80 const char *header_buf, size_t header_len)
82 struct sender_client *sc, *tmp;
84 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
85 struct private_http_sender_data *phsd = sc->private_data;
86 if (phsd->status != HTTP_STREAMING)
88 send_chunk(sc, hss, 0, current_chunk, buf, len, header_buf,
93 static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
95 struct sender_client *sc, *tmp;
96 struct private_http_sender_data *phsd;
98 if (hss->listen_fd < 0)
100 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
101 phsd = sc->private_data;
102 switch (phsd->status) {
103 case HTTP_STREAMING: /* nothing to do */
105 case HTTP_CONNECTED: /* need to recv get request */
106 if (FD_ISSET(sc->fd, rfds)) {
107 if (recv_pattern(sc->fd, HTTP_GET_MSG, MAXLINE)
109 phsd->status = HTTP_INVALID_GET_REQUEST;
111 phsd->status = HTTP_GOT_GET_REQUEST;
112 PARA_INFO_LOG("received get request\n");
116 case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
117 phsd->status = HTTP_STREAMING;
118 http_send_ok_msg(sc);
120 case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
121 if (http_send_err_msg(sc) >= 0)
122 shutdown_client(sc, hss);
126 if (!FD_ISSET(hss->listen_fd, rfds))
128 sc = accept_sender_client(hss);
131 phsd = para_malloc(sizeof(*phsd));
132 sc->private_data = phsd;
133 phsd->status = HTTP_CONNECTED;
136 static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
138 struct sender_client *sc, *tmp;
140 if (hss->listen_fd < 0)
142 para_fd_set(hss->listen_fd, rfds, max_fileno);
143 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
144 struct private_http_sender_data *phsd = sc->private_data;
145 if (phsd->status == HTTP_CONNECTED) /* need to recv get request */
146 para_fd_set(sc->fd, rfds, max_fileno);
150 static int http_com_on(__a_unused struct sender_command_data *scd)
152 return generic_com_on(hss, IPPROTO_TCP);
155 static int http_com_off(__a_unused struct sender_command_data *scd)
157 generic_com_off(hss);
161 static int http_com_deny(struct sender_command_data *scd)
163 generic_com_deny(scd, hss);
167 static int http_com_allow(struct sender_command_data *scd)
169 generic_com_allow(scd, hss);
173 static char *http_info(void)
175 return get_sender_info(hss, "http");
179 * The init function of the http sender.
181 * \param s Pointer to the http sender struct.
183 * It initializes all function pointers of \a s, the client list and the access
184 * control list. If the autostart option was given, the tcp port is opened.
186 void http_send_init(struct sender *s)
191 s->pre_select = http_pre_select;
192 s->post_select = http_post_select;
193 s->shutdown_clients = http_shutdown_clients;
194 s->help = generic_sender_help;
195 s->client_cmds[SENDER_ON] = http_com_on;
196 s->client_cmds[SENDER_OFF] = http_com_off;
197 s->client_cmds[SENDER_DENY] = http_com_deny;
198 s->client_cmds[SENDER_ALLOW] = http_com_allow;
199 s->client_cmds[SENDER_ADD] = NULL;
200 s->client_cmds[SENDER_DELETE] = NULL;
202 init_sender_status(hss, conf.http_access_arg, conf.http_access_given,
203 conf.http_port_arg, conf.http_max_clients_arg,
204 conf.http_default_deny_given);
205 if (conf.http_no_autostart_given)
207 ret = generic_com_on(hss, IPPROTO_TCP);
209 PARA_ERROR_LOG("%s\n", para_strerror(-ret));