audiod.c: Fix stat task restarting.
[paraslash.git] / http_send.c
1 /*
2 * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file http_send.c paraslash's http sender */
8
9 #include <sys/types.h>
10 #include <dirent.h>
11
12 #include "para.h"
13 #include "error.h"
14 #include "string.h"
15 #include "server.cmdline.h"
16 #include "afh.h"
17 #include "afs.h"
18 #include "server.h"
19 #include "http.h"
20 #include "vss.h"
21 #include "list.h"
22 #include "send.h"
23 #include "close_on_fork.h"
24 #include "net.h"
25 #include "fd.h"
26 #include "chunk_queue.h"
27 #include "acl.h"
28
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"
31
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. */
35 HTTP_CONNECTED,
36 /** Successfully received the get request. */
37 HTTP_GOT_GET_REQUEST,
38 /** Connection is ready for sending audio data. */
39 HTTP_STREAMING,
40 /** We didn't receive a valid get request. */
41 HTTP_INVALID_GET_REQUEST
42 };
43
44 struct private_http_sender_data {
45 enum http_client_status status;
46 };
47
48 static struct sender_status http_sender_status, *hss = &http_sender_status;
49
50 static int http_send_msg(struct sender_client *sc, const char *msg)
51 {
52 int ret = send_buffer(sc->fd, msg);
53
54 if (ret < 0)
55 shutdown_client(sc, hss);
56 return ret;
57 }
58
59 static void http_send_ok_msg(struct sender_client *sc)
60 {
61 PARA_INFO_LOG("sending http ok message to fd %d\n", sc->fd);
62 http_send_msg(sc, HTTP_OK_MSG);
63 }
64
65 static int http_send_err_msg(struct sender_client *sc)
66 {
67 PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc->fd);
68 return http_send_msg(sc, HTTP_ERR_MSG);
69 }
70
71 static void http_shutdown_clients(void)
72 {
73 shutdown_clients(hss);
74 }
75
76 static void http_send(long unsigned current_chunk,
77 __a_unused long unsigned chunks_sent, const char *buf, size_t len)
78 {
79 struct sender_client *sc, *tmp;
80
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)
84 continue;
85 send_chunk(sc, hss, 0, current_chunk, buf, len);
86 }
87 }
88
89 static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
90 {
91 struct sender_client *sc, *tmp;
92 struct private_http_sender_data *phsd;
93
94 if (hss->listen_fd < 0)
95 return;
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 */
100 break;
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)
104 < 0) {
105 phsd->status = HTTP_INVALID_GET_REQUEST;
106 } else {
107 phsd->status = HTTP_GOT_GET_REQUEST;
108 PARA_INFO_LOG("received get request\n");
109 }
110 }
111 break;
112 case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
113 phsd->status = HTTP_STREAMING;
114 http_send_ok_msg(sc);
115 break;
116 case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
117 if (http_send_err_msg(sc) >= 0)
118 shutdown_client(sc, hss);
119 break;
120 }
121 }
122 if (!FD_ISSET(hss->listen_fd, rfds))
123 return;
124 sc = accept_sender_client(hss);
125 if (!sc)
126 return;
127 phsd = para_malloc(sizeof(*phsd));
128 sc->private_data = phsd;
129 phsd->status = HTTP_CONNECTED;
130 }
131
132 static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
133 {
134 struct sender_client *sc, *tmp;
135
136 if (hss->listen_fd < 0)
137 return;
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);
143 }
144 }
145
146 static int http_com_on(__a_unused struct sender_command_data *scd)
147 {
148 return generic_com_on(hss, IPPROTO_TCP);
149 }
150
151 static int http_com_off(__a_unused struct sender_command_data *scd)
152 {
153 generic_com_off(hss);
154 return 1;
155 }
156
157 static int http_com_deny(struct sender_command_data *scd)
158 {
159 generic_com_deny(scd, hss);
160 return 1;
161 }
162
163 static int http_com_allow(struct sender_command_data *scd)
164 {
165 generic_com_allow(scd, hss);
166 return 1;
167 }
168
169 static char *http_info(void)
170 {
171 return get_sender_info(hss, "http");
172 }
173
174 /**
175 * The init function of the http sender.
176 *
177 * \param s Pointer to the http sender struct.
178 *
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.
181 */
182 void http_send_init(struct sender *s)
183 {
184 int ret;
185 s->info = http_info;
186 s->send = http_send;
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;
197
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)
202 return;
203 ret = generic_com_on(hss, IPPROTO_TCP);
204 if (ret < 0)
205 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
206 }