1 /* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file http_send.c paraslash's http sender */
5 #include <netinet/in.h>
6 #include <sys/socket.h>
14 #include "server.lsg.h"
26 #include "close_on_fork.h"
28 #include "chunk_queue.h"
31 /** Message sent to clients that do not send a valid get request. */
32 #define HTTP_ERR_MSG "HTTP/1.0 400 Bad Request\n"
34 /** The possible states of a client from the server's POV. */
35 enum http_client_status
{
36 /** We accepted the connection on the tcp socket. */
38 /** Successfully received the get request. */
40 /** Connection is ready for sending audio data. */
42 /** We didn't receive a valid get request. */
43 HTTP_INVALID_GET_REQUEST
46 /** For each connected client, a structure of this type is maintained. */
47 struct private_http_sender_data
{
48 /** The current state of this client. */
49 enum http_client_status status
;
52 static struct sender_status http_sender_status
, *hss
= &http_sender_status
;
54 static int http_send_msg(struct sender_client
*sc
, const char *msg
)
56 int ret
= write_buffer(sc
->fd
, msg
);
59 shutdown_client(sc
, hss
);
63 static void http_send_ok_msg(struct sender_client
*sc
)
65 PARA_INFO_LOG("sending http ok message to fd %d\n", sc
->fd
);
66 http_send_msg(sc
, HTTP_OK_MSG
);
69 static int http_send_err_msg(struct sender_client
*sc
)
71 PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc
->fd
);
72 return http_send_msg(sc
, HTTP_ERR_MSG
);
75 static void http_shutdown_clients(void)
77 shutdown_clients(hss
);
80 static int queue_chunk_or_shutdown(struct sender_client
*sc
,
81 struct sender_status
*ss
, const char *buf
, size_t num_bytes
)
83 int ret
= cq_enqueue(sc
->cq
, buf
, num_bytes
);
85 shutdown_client(sc
, ss
);
90 * Send one chunk of audio data to a connected client.
92 * \param sc The client.
93 * \param ss The sender.
94 * \param current_chunk The number of the chunk to write.
95 * \param buf The data to write.
96 * \param len The number of bytes of \a buf.
97 * \param header_buf The audio file header.
98 * \param header_len The number of bytes of \a header_buf.
100 * On errors, the client is shut down. If only a part of the buffer could be
101 * written, the remainder is put into the chunk queue for that client.
103 static void http_send_chunk(struct sender_client
*sc
, struct sender_status
*ss
,
104 long unsigned current_chunk
, const char *buf
, size_t len
,
105 const char *header_buf
, size_t header_len
)
109 if (!sc
->header_sent
&& current_chunk
) {
110 if (header_buf
&& header_len
> 0) {
111 ret
= queue_chunk_or_shutdown(sc
, ss
, header_buf
, header_len
);
117 ret
= send_queued_chunks(sc
->fd
, sc
->cq
);
119 shutdown_client(sc
, ss
);
124 if (!ret
) { /* still data left in the queue */
125 ret
= queue_chunk_or_shutdown(sc
, ss
, buf
, len
);
128 ret
= xwrite(sc
->fd
, buf
, len
);
130 shutdown_client(sc
, ss
);
134 ret
= queue_chunk_or_shutdown(sc
, ss
, buf
+ ret
, len
- ret
);
137 PARA_NOTICE_LOG("%s\n", para_strerror(-ret
));
140 static void http_send(long unsigned current_chunk
,
141 __a_unused
long unsigned chunks_sent
, const char *buf
, size_t len
,
142 const char *header_buf
, size_t header_len
)
144 struct sender_client
*sc
, *tmp
;
146 list_for_each_entry_safe(sc
, tmp
, &hss
->client_list
, node
) {
147 struct private_http_sender_data
*phsd
= sc
->private_data
;
149 if (phsd
->status
== HTTP_STREAMING
)
150 http_send_chunk(sc
, hss
, current_chunk
, buf
, len
,
151 header_buf
, header_len
);
155 static void http_post_select(fd_set
*rfds
, __a_unused fd_set
*wfds
)
157 struct sender_client
*sc
, *tmp
;
158 struct private_http_sender_data
*phsd
;
161 list_for_each_entry_safe(sc
, tmp
, &hss
->client_list
, node
) {
162 phsd
= sc
->private_data
;
163 switch (phsd
->status
) {
164 case HTTP_STREAMING
: /* nothing to do */
166 case HTTP_CONNECTED
: /* need to recv get request */
167 ret
= read_pattern(sc
->fd
, HTTP_GET_MSG
, MAXLINE
, rfds
);
169 phsd
->status
= HTTP_INVALID_GET_REQUEST
;
171 phsd
->status
= HTTP_GOT_GET_REQUEST
;
172 PARA_INFO_LOG("received get request\n");
175 case HTTP_GOT_GET_REQUEST
: /* need to send ok msg */
176 phsd
->status
= HTTP_STREAMING
;
177 http_send_ok_msg(sc
);
179 case HTTP_INVALID_GET_REQUEST
: /* need to send err msg */
180 if (http_send_err_msg(sc
) >= 0)
181 shutdown_client(sc
, hss
);
185 sc
= accept_sender_client(hss
, rfds
);
188 phsd
= para_malloc(sizeof(*phsd
));
189 sc
->private_data
= phsd
;
190 phsd
->status
= HTTP_CONNECTED
;
193 static void http_pre_select(int *max_fileno
, fd_set
*rfds
, fd_set
*wfds
)
195 struct sender_client
*sc
, *tmp
;
197 if (hss
->listen_fd
< 0)
199 para_fd_set(hss
->listen_fd
, rfds
, max_fileno
);
200 list_for_each_entry_safe(sc
, tmp
, &hss
->client_list
, node
) {
201 struct private_http_sender_data
*phsd
= sc
->private_data
;
202 if (phsd
->status
== HTTP_CONNECTED
) /* need to recv get request */
203 para_fd_set(sc
->fd
, rfds
, max_fileno
);
204 if (phsd
->status
== HTTP_GOT_GET_REQUEST
||
205 phsd
->status
== HTTP_INVALID_GET_REQUEST
)
206 para_fd_set(sc
->fd
, wfds
, max_fileno
);
210 static int http_com_on(__a_unused
struct sender_command_data
*scd
)
212 generic_com_on(hss
, IPPROTO_TCP
);
216 static int http_com_off(__a_unused
struct sender_command_data
*scd
)
218 generic_com_off(hss
);
222 static int http_com_deny(struct sender_command_data
*scd
)
224 generic_com_deny(scd
, hss
);
228 static int http_com_allow(struct sender_command_data
*scd
)
230 generic_com_allow(scd
, hss
);
234 static char *http_status(void)
236 return generic_sender_status(hss
, "http");
240 * The init function of the http sender.
242 * \param s Pointer to the http sender struct.
244 * It initializes all function pointers of \a s, the client list and the access
245 * control list. If the autostart option was given, the tcp port is opened.
247 void http_send_init(struct sender
*s
)
249 s
->status
= http_status
;
251 s
->pre_select
= http_pre_select
;
252 s
->post_select
= http_post_select
;
253 s
->shutdown_clients
= http_shutdown_clients
;
254 s
->resolve_target
= NULL
;
255 s
->help
= generic_sender_help
;
256 s
->client_cmds
[SENDER_on
] = http_com_on
;
257 s
->client_cmds
[SENDER_off
] = http_com_off
;
258 s
->client_cmds
[SENDER_deny
] = http_com_deny
;
259 s
->client_cmds
[SENDER_allow
] = http_com_allow
;
260 s
->client_cmds
[SENDER_add
] = NULL
;
261 s
->client_cmds
[SENDER_delete
] = NULL
;
263 init_sender_status(hss
, OPT_RESULT(HTTP_ACCESS
),
264 OPT_UINT32_VAL(HTTP_PORT
), OPT_UINT32_VAL(HTTP_MAX_CLIENTS
),
265 OPT_GIVEN(HTTP_DEFAULT_DENY
));
266 if (OPT_GIVEN(HTTP_NO_AUTOSTART
))
268 generic_com_on(hss
, IPPROTO_TCP
);