1 | //proto.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2010 |
---|
5 | * |
---|
6 | * This file is part of libroar a part of RoarAudio, |
---|
7 | * a cross-platform sound system for both, home and professional use. |
---|
8 | * See README for details. |
---|
9 | * |
---|
10 | * This file is free software; you can redistribute it and/or modify |
---|
11 | * it under the terms of the GNU General Public License version 3 |
---|
12 | * as published by the Free Software Foundation. |
---|
13 | * |
---|
14 | * libroar is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with this software; see the file COPYING. If not, write to |
---|
21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
---|
22 | * Boston, MA 02110-1301, USA. |
---|
23 | * |
---|
24 | * NOTE for everyone want's to change something and send patches: |
---|
25 | * read README and HACKING! There a addition information on |
---|
26 | * the license of this document you need to read before you send |
---|
27 | * any patches. |
---|
28 | * |
---|
29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
30 | * or libpulse*: |
---|
31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
---|
32 | * and are therefore GPL. Because of this it may be illigal to use |
---|
33 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
34 | */ |
---|
35 | |
---|
36 | #include "libroar.h" |
---|
37 | |
---|
38 | #define _ROAR_MESS_BUF_LEN (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 4 /* pos */ + 2 /* datalen */) |
---|
39 | int roar_send_message (struct roar_connection * con, struct roar_message * mes, char * data) { |
---|
40 | struct roar_vio_calls * vio; |
---|
41 | |
---|
42 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
43 | return -1; |
---|
44 | |
---|
45 | return roar_vsend_message(vio, mes, data); |
---|
46 | } |
---|
47 | |
---|
48 | int roar_vsend_message(struct roar_vio_calls * vio, struct roar_message * mes, char * data) { |
---|
49 | char buf[_ROAR_MESS_BUF_LEN]; |
---|
50 | |
---|
51 | roar_errno = ROAR_ERROR_UNKNOWN; |
---|
52 | |
---|
53 | ROAR_DBG("roar_send_message(*): try to send an request..."); |
---|
54 | |
---|
55 | buf[0] = _ROAR_MESSAGE_VERSION; |
---|
56 | buf[1] = (unsigned char) mes->cmd; |
---|
57 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
---|
58 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->pos); |
---|
59 | *(uint16_t*)(buf+8) = ROAR_HOST2NET16(mes->datalen); |
---|
60 | |
---|
61 | if ( roar_vio_write(vio, buf, _ROAR_MESS_BUF_LEN) != _ROAR_MESS_BUF_LEN ) { |
---|
62 | roar_errno = ROAR_ERROR_PIPE; |
---|
63 | return -1; |
---|
64 | } |
---|
65 | |
---|
66 | if ( mes->datalen != 0 ) { |
---|
67 | if ( roar_vio_write(vio, data == NULL ? mes->data : data, mes->datalen) != mes->datalen ) { |
---|
68 | roar_errno = ROAR_ERROR_PIPE; |
---|
69 | return -1; |
---|
70 | } |
---|
71 | } |
---|
72 | |
---|
73 | roar_errno = ROAR_ERROR_NONE; |
---|
74 | |
---|
75 | ROAR_DBG("roar_send_message(*) = 0"); |
---|
76 | return 0; |
---|
77 | } |
---|
78 | |
---|
79 | int roar_recv_message (struct roar_connection * con, struct roar_message * mes, char ** data) { |
---|
80 | struct roar_vio_calls * vio; |
---|
81 | |
---|
82 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
83 | return -1; |
---|
84 | |
---|
85 | return roar_vrecv_message(vio, mes, data); |
---|
86 | } |
---|
87 | |
---|
88 | int roar_vrecv_message(struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
---|
89 | char buf[_ROAR_MESS_BUF_LEN]; |
---|
90 | |
---|
91 | roar_errno = ROAR_ERROR_UNKNOWN; |
---|
92 | |
---|
93 | ROAR_DBG("roar_recv_message(*): try to get a response form the server..."); |
---|
94 | |
---|
95 | if ( mes == NULL ) |
---|
96 | return -1; |
---|
97 | |
---|
98 | if ( data != NULL ) |
---|
99 | *data = NULL; |
---|
100 | |
---|
101 | memset(mes, 0, sizeof(struct roar_message)); |
---|
102 | |
---|
103 | if ( roar_vio_read(vio, buf, _ROAR_MESS_BUF_LEN) != _ROAR_MESS_BUF_LEN ) { |
---|
104 | roar_errno = ROAR_ERROR_PROTO; |
---|
105 | return -1; |
---|
106 | } |
---|
107 | |
---|
108 | ROAR_DBG("roar_recv_message(*): Got a header"); |
---|
109 | |
---|
110 | if ( buf[0] != _ROAR_MESSAGE_VERSION ) { |
---|
111 | roar_errno = ROAR_ERROR_PROTO; |
---|
112 | return -1; |
---|
113 | } |
---|
114 | |
---|
115 | mes->cmd = (unsigned char)buf[1]; |
---|
116 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
---|
117 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
---|
118 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(buf+8)); |
---|
119 | |
---|
120 | if ( (int16_t)mes->stream == -1 ) |
---|
121 | mes->stream = -1; |
---|
122 | |
---|
123 | ROAR_DBG("roar_recv_message(*): command=%i(%s)", mes->cmd, |
---|
124 | mes->cmd == ROAR_CMD_OK ? "OK" : (mes->cmd == ROAR_CMD_ERROR ? "ERROR" : "UNKNOWN")); |
---|
125 | |
---|
126 | if ( mes->datalen == 0 ) { |
---|
127 | ROAR_DBG("roar_recv_message(*): no data in this pkg"); |
---|
128 | ROAR_DBG("roar_recv_message(*) = 0"); |
---|
129 | roar_errno = ROAR_ERROR_NONE; |
---|
130 | return 0; |
---|
131 | } |
---|
132 | |
---|
133 | if ( mes->datalen <= LIBROAR_BUFFER_MSGDATA ) { |
---|
134 | if ( roar_vio_read(vio, mes->data, mes->datalen) == mes->datalen ) { |
---|
135 | ROAR_DBG("roar_recv_message(*): Got data!"); |
---|
136 | ROAR_DBG("roar_recv_message(*) = 0"); |
---|
137 | roar_errno = ROAR_ERROR_NONE; |
---|
138 | return 0; |
---|
139 | } |
---|
140 | |
---|
141 | roar_errno = ROAR_ERROR_PIPE; |
---|
142 | return -1; |
---|
143 | } else { |
---|
144 | if ( data == NULL ) { |
---|
145 | roar_errno = ROAR_ERROR_MSGSIZE; |
---|
146 | return -1; |
---|
147 | } |
---|
148 | |
---|
149 | if ( (*data = malloc(mes->datalen)) == NULL ) { |
---|
150 | roar_errno = ROAR_ERROR_NOMEM; |
---|
151 | return -1; |
---|
152 | } |
---|
153 | |
---|
154 | if ( mes->datalen == 0 ) { |
---|
155 | roar_errno = ROAR_ERROR_NONE; |
---|
156 | return 0; |
---|
157 | } |
---|
158 | |
---|
159 | if ( roar_vio_read(vio, *data, mes->datalen) == mes->datalen ) { |
---|
160 | ROAR_DBG("roar_recv_message(*): Got data!"); |
---|
161 | ROAR_DBG("roar_recv_message(*) = 0"); |
---|
162 | roar_errno = ROAR_ERROR_NONE; |
---|
163 | return 0; |
---|
164 | } |
---|
165 | |
---|
166 | roar_errno = ROAR_ERROR_PIPE; |
---|
167 | return -1; |
---|
168 | } |
---|
169 | |
---|
170 | // what happened here? |
---|
171 | return -1; |
---|
172 | } |
---|
173 | |
---|
174 | int roar_req (struct roar_connection * con, struct roar_message * mes, char ** data) { |
---|
175 | struct roar_vio_calls * vio; |
---|
176 | |
---|
177 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
178 | return -1; |
---|
179 | |
---|
180 | return roar_vreq(vio, mes, data); |
---|
181 | } |
---|
182 | |
---|
183 | int roar_vreq (struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
---|
184 | if ( roar_vsend_message(vio, mes, data ? *data : NULL) != 0 ) |
---|
185 | return -1; |
---|
186 | |
---|
187 | if ( data ) |
---|
188 | free(*data); |
---|
189 | |
---|
190 | roar_vio_sync(vio); // we need to do this becasue of ssl/compressed links |
---|
191 | |
---|
192 | return roar_vrecv_message(vio, mes, data); |
---|
193 | } |
---|
194 | |
---|
195 | //ll |
---|