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 */
16 #include "server.cmdline.h"
24 #include "close_on_fork.h"
27 #include "chunk_queue.h"
30 /** Message sent to clients that do not send a valid get request. */
31 #define HTTP_ERR_MSG "HTTP/1.0 400 Bad Request\n"
33 /** The possible states of a client from the server's POV. */
34 enum http_client_status {
35 /** We accepted the connection on the tcp socket. */
37 /** Successfully received the get request. */
39 /** Connection is ready for sending audio data. */
41 /** We didn't receive a valid get request. */
42 HTTP_INVALID_GET_REQUEST
45 /** For each connected client, a structure of this type is maintained. */
46 struct private_http_sender_data {
47 /** The current state of this client. */
48 enum http_client_status status;
51 static struct sender_status http_sender_status, *hss = &http_sender_status;
53 static int http_send_msg(struct sender_client *sc, const char *msg)
55 int ret = send_buffer(sc->fd, msg);
58 shutdown_client(sc, hss);
62 static void http_send_ok_msg(struct sender_client *sc)
64 PARA_INFO_LOG("sending http ok message to fd %d\n", sc->fd);
65 http_send_msg(sc, HTTP_OK_MSG);
68 static int http_send_err_msg(struct sender_client *sc)
70 PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc->fd);
71 return http_send_msg(sc, HTTP_ERR_MSG);
74 static void http_shutdown_clients(void)
76 shutdown_clients(hss);
79 static void http_send(long unsigned current_chunk,
80 __a_unused long unsigned chunks_sent, const char *buf, size_t len,
81 const char *header_buf, size_t header_len)
83 struct sender_client *sc, *tmp;
85 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
86 struct private_http_sender_data *phsd = sc->private_data;
87 if (phsd->status != HTTP_STREAMING)
89 send_chunk(sc, hss, 0, current_chunk, buf, len, header_buf,
94 static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
96 struct sender_client *sc, *tmp;
97 struct private_http_sender_data *phsd;
99 if (hss->listen_fd < 0)
101 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
102 phsd = sc->private_data;
103 switch (phsd->status) {
104 case HTTP_STREAMING: /* nothing to do */
106 case HTTP_CONNECTED: /* need to recv get request */
107 if (FD_ISSET(sc->fd, rfds)) {
108 if (recv_pattern(sc->fd, HTTP_GET_MSG, MAXLINE)
110 phsd->status = HTTP_INVALID_GET_REQUEST;
112 phsd->status = HTTP_GOT_GET_REQUEST;
113 PARA_INFO_LOG("received get request\n");
117 case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
118 phsd->status = HTTP_STREAMING;
119 http_send_ok_msg(sc);
121 case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
122 if (http_send_err_msg(sc) >= 0)
123 shutdown_client(sc, hss);
127 if (!FD_ISSET(hss->listen_fd, rfds))
129 sc = accept_sender_client(hss);
132 phsd = para_malloc(sizeof(*phsd));
133 sc->private_data = phsd;
134 phsd->status = HTTP_CONNECTED;
137 static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
139 struct sender_client *sc, *tmp;
141 if (hss->listen_fd < 0)
143 para_fd_set(hss->listen_fd, rfds, max_fileno);
144 list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
145 struct private_http_sender_data *phsd = sc->private_data;
146 if (phsd->status == HTTP_CONNECTED) /* need to recv get request */
147 para_fd_set(sc->fd, rfds, max_fileno);
151 static int http_com_on(__a_unused struct sender_command_data *scd)
153 return generic_com_on(hss, IPPROTO_TCP);
156 static int http_com_off(__a_unused struct sender_command_data *scd)
158 generic_com_off(hss);
162 static int http_com_deny(struct sender_command_data *scd)
164 generic_com_deny(scd, hss);
168 static int http_com_allow(struct sender_command_data *scd)
170 generic_com_allow(scd, hss);
174 static char *http_info(void)
176 return get_sender_info(hss, "http");
180 * The init function of the http sender.
182 * \param s Pointer to the http sender struct.
184 * It initializes all function pointers of \a s, the client list and the access
185 * control list. If the autostart option was given, the tcp port is opened.
187 void http_send_init(struct sender *s)
192 s->pre_select = http_pre_select;
193 s->post_select = http_post_select;
194 s->shutdown_clients = http_shutdown_clients;
195 s->help = generic_sender_help;
196 s->client_cmds[SENDER_ON] = http_com_on;
197 s->client_cmds[SENDER_OFF] = http_com_off;
198 s->client_cmds[SENDER_DENY] = http_com_deny;
199 s->client_cmds[SENDER_ALLOW] = http_com_allow;
200 s->client_cmds[SENDER_ADD] = NULL;
201 s->client_cmds[SENDER_DELETE] = NULL;
203 init_sender_status(hss, conf.http_access_arg, conf.http_access_given,
204 conf.http_port_arg, conf.http_max_clients_arg,
205 conf.http_default_deny_given);
206 if (conf.http_no_autostart_given)
208 ret = generic_com_on(hss, IPPROTO_TCP);
210 PARA_ERROR_LOG("%s\n", para_strerror(-ret));