63bfec03c9d1cd17ac4b34a7609c32c28c218ead
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"
33 /** The possible states of a client from the server's POV. */
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 /** Clients will be kicked if there are more than that many bytes pending. */
46 #define MAX_BACKLOG 400000
47 /** The list of connected clients. */
48 static struct list_head clients
;
49 /** The whitelist/blacklist. */
50 static struct list_head http_acl
;
52 static int listen_fd
= -1, numclients
;
54 struct private_http_sender_data
{
55 enum http_status status
;
58 static int http_send_msg(struct sender_client
*sc
, const char *msg
)
60 int ret
= send_buffer(sc
->fd
, msg
);
67 static void http_send_ok_msg(struct sender_client
*sc
)
69 PARA_INFO_LOG("sending http ok message to fd %d\n", sc
->fd
);
70 http_send_msg(sc
, HTTP_OK_MSG
);
73 static int http_send_err_msg(struct sender_client
*sc
)
75 PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc
->fd
);
76 return http_send_msg(sc
, HTTP_ERR_MSG
);
79 static void http_shutdown_clients(void)
81 struct sender_client
*sc
, *tmp
;
82 list_for_each_entry_safe(sc
, tmp
, &clients
, node
)
86 static void http_send(long unsigned current_chunk
,
87 __a_unused
long unsigned chunks_sent
, const char *buf
, size_t len
)
89 struct sender_client
*sc
, *tmp
;
91 list_for_each_entry_safe(sc
, tmp
, &clients
, node
) {
92 struct private_http_sender_data
*phsd
= sc
->private_data
;
93 if (phsd
->status
!= HTTP_STREAMING
)
95 send_chunk(sc
, 0, current_chunk
, buf
, len
);
99 static void http_post_select(fd_set
*rfds
, __a_unused fd_set
*wfds
)
102 struct sender_client
*sc
, *tmp
;
103 struct private_http_sender_data
*phsd
;
107 list_for_each_entry_safe(sc
, tmp
, &clients
, node
) {
108 phsd
= sc
->private_data
;
109 switch (phsd
->status
) {
110 case HTTP_STREAMING
: /* nothing to do */
112 case HTTP_CONNECTED
: /* need to recv get request */
113 if (FD_ISSET(sc
->fd
, rfds
)) {
114 if (recv_pattern(sc
->fd
, HTTP_GET_MSG
, MAXLINE
)
116 phsd
->status
= HTTP_INVALID_GET_REQUEST
;
118 phsd
->status
= HTTP_GOT_GET_REQUEST
;
120 "received get request\n");
124 case HTTP_GOT_GET_REQUEST
: /* need to send ok msg */
125 phsd
->status
= HTTP_STREAMING
;
126 http_send_ok_msg(sc
);
128 case HTTP_INVALID_GET_REQUEST
: /* need to send err msg */
129 if (http_send_err_msg(sc
) >= 0)
134 if (!FD_ISSET(listen_fd
, rfds
))
136 ret
= para_accept(listen_fd
, NULL
, 0);
138 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
142 ret
= -E_MAX_CLIENTS
;
143 if (conf
.http_max_clients_arg
> 0 && numclients
>=
144 conf
.http_max_clients_arg
) {
147 ret
= mark_fd_nonblocking(fd
);
150 match
= acl_lookup(fd
, &http_acl
);
151 PARA_DEBUG_LOG("acl lookup returned %d\n", match
);
153 if ((match
&& !conf
.http_default_deny_given
) ||
154 (!match
&& conf
.http_default_deny_given
))
157 sc
= para_calloc(sizeof(*sc
));
159 sc
->name
= make_message("%s", remote_name(fd
));
160 PARA_NOTICE_LOG("connection from %s (fd %d)\n", sc
->name
, fd
);
161 phsd
= para_malloc(sizeof(*phsd
));
162 sc
->private_data
= phsd
;
163 phsd
->status
= HTTP_CONNECTED
;
164 sc
->cq
= cq_new(MAX_BACKLOG
);
165 PARA_INFO_LOG("accepted client #%d: %s (fd %d)\n", numclients
,
167 para_list_add(&sc
->node
, &clients
);
168 add_close_on_fork_list(fd
);
171 PARA_WARNING_LOG("%s\n", para_strerror(-ret
));
175 static void http_pre_select(int *max_fileno
, fd_set
*rfds
, __a_unused fd_set
*wfds
)
177 struct sender_client
*sc
, *tmp
;
181 para_fd_set(listen_fd
, rfds
, max_fileno
);
182 list_for_each_entry_safe(sc
, tmp
, &clients
, node
) {
183 struct private_http_sender_data
*phsd
= sc
->private_data
;
184 if (phsd
->status
== HTTP_CONNECTED
) /* need to recv get request */
185 para_fd_set(sc
->fd
, rfds
, max_fileno
);
189 static int http_com_on(__a_unused
struct sender_command_data
*scd
)
193 return open_sender(IPPROTO_TCP
, conf
.http_port_arg
);
196 static int http_com_off(__a_unused
struct sender_command_data
*scd
)
200 PARA_NOTICE_LOG("closing http port %d\n", conf
.http_port_arg
);
202 del_close_on_fork_list(listen_fd
);
203 http_shutdown_clients();
208 static int http_com_deny(struct sender_command_data
*scd
)
210 if (conf
.http_default_deny_given
)
211 acl_del_entry(&http_acl
, scd
->addr
, scd
->netmask
);
213 acl_add_entry(&http_acl
, scd
->addr
, scd
->netmask
);
217 static int http_com_allow(struct sender_command_data
*scd
)
219 if (conf
.http_default_deny_given
)
220 acl_add_entry(&http_acl
, scd
->addr
, scd
->netmask
);
222 acl_del_entry(&http_acl
, scd
->addr
, scd
->netmask
);
226 static char *http_info(void)
228 char *clnts
= NULL
, *ret
;
229 struct sender_client
*sc
, *tmp_sc
;
231 char *acl_contents
= acl_get_contents(&http_acl
);
232 list_for_each_entry_safe(sc
, tmp_sc
, &clients
, node
) {
233 char *tmp
= make_message("%s%s ", clnts
? clnts
: "", sc
->name
);
239 "http tcp port: %d\n"
241 "http maximal number of clients: %d%s\n"
242 "http connected clients: %s\n"
243 "http access %s list: %s\n",
244 (listen_fd
>= 0)? "on" : "off",
247 conf
.http_max_clients_arg
,
248 conf
.http_max_clients_arg
> 0? "" : " (unlimited)",
249 clnts
? clnts
: "(none)",
250 conf
.http_default_deny_given
? "allow" : "deny",
251 acl_contents
? acl_contents
: "(none)"
258 static char *http_help(void)
262 "usage: {allow|deny} IP mask\n"
263 "example: allow 127.0.0.1 32\n"
268 * The init function of the http sender.
270 * \param s Pointer to the http sender struct.
272 * It initializes all function pointers of \a s, the client list and the access
273 * control list. If the autostart option was given, the tcp port is opened.
275 void http_send_init(struct sender
*s
)
278 INIT_LIST_HEAD(&clients
);
281 s
->pre_select
= http_pre_select
;
282 s
->post_select
= http_post_select
;
283 s
->shutdown_clients
= http_shutdown_clients
;
285 s
->client_cmds
[SENDER_ON
] = http_com_on
;
286 s
->client_cmds
[SENDER_OFF
] = http_com_off
;
287 s
->client_cmds
[SENDER_DENY
] = http_com_deny
;
288 s
->client_cmds
[SENDER_ALLOW
] = http_com_allow
;
289 s
->client_cmds
[SENDER_ADD
] = NULL
;
290 s
->client_cmds
[SENDER_DELETE
] = NULL
;
291 acl_init(&http_acl
, conf
.http_access_arg
, conf
.http_access_given
);
292 if (conf
.http_no_autostart_given
)
294 ret
= open_sender(IPPROTO_TCP
, conf
.http_port_arg
);
296 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));