source: roaraudio/libroar/serverinfo.c @ 4708:c9d40761088a

Last change on this file since 4708:c9d40761088a was 4708:c9d40761088a, checked in by phi, 13 years ago

updated copyright statements

File size: 7.3 KB
Line 
1//serverinfo.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2011
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
38struct ie {
39 int type;
40 size_t len;
41 char * buf;
42};
43
44struct roar_server_info * roar_server_info(struct roar_connection * con) {
45 struct roar_server_info * ret;
46 struct roar_message mes;
47 uint16_t * d16;
48 char * data = NULL;
49
50 memset(&mes, 0, sizeof(mes));
51
52 mes.cmd = ROAR_CMD_SERVER_INFO;
53 mes.datalen = 2*2;
54 d16 = (uint16_t*)mes.data;
55
56 d16[0] = ROAR_HOST2NET16(0); // version
57 d16[1] = ROAR_HOST2NET16(ROAR_IT_SERVER);
58
59 if ( roar_req(con, &mes, &data) != 0 )
60  return NULL;
61
62 if ( mes.cmd != ROAR_CMD_OK )
63  return NULL;
64
65 ret = roar_server_info_from_mes(&mes, data);
66
67 if ( data != NULL )
68  free(data);
69
70 return ret;
71}
72
73int roar_server_info_free(struct roar_server_info * info) {
74 if ( info == NULL )
75  return -1;
76
77 roar_mm_free(info);
78
79 return 0;
80}
81
82#define _add(t, m) do { if ( info->m != NULL && (sl = strlen(info->m)) != 0 ) { iebuf[idx].type = (t); iebuf[idx].len = sl; iebuf[idx].buf = (info->m); idx++; needlen += 4 + sl; } } while (0)
83
84int roar_server_info_to_mes(struct roar_message * mes, struct roar_server_info * info, void ** data) {
85 size_t needlen = 4;
86 size_t sl;
87 int idx = 0;
88 struct ie iebuf[sizeof(struct roar_server_info)/sizeof(char*)];
89 uint16_t * d16, * dptr;
90 char * textpart;
91 int i;
92 char * mesdata;
93
94 if ( mes == NULL || info == NULL )
95  return -1;
96
97 _add(ROAR_ITST_VERSION, version);
98 _add(ROAR_ITST_LOCATION, location);
99 _add(ROAR_ITST_DESCRIPTION, description);
100 _add(ROAR_ITST_CONTACT, contact);
101 _add(ROAR_ITST_SERIAL, serial);
102 _add(ROAR_ITST_ADDRESS, address);
103 _add(ROAR_ITST_UIURL, uiurl);
104 _add(ROAR_ITST_UN_SYSNAME, un.sysname);
105 _add(ROAR_ITST_UN_RELEASE, un.release);
106 _add(ROAR_ITST_UN_NODENAME, un.nodename);
107 _add(ROAR_ITST_UN_MACHINE, un.machine);
108
109 if ( needlen > LIBROAR_BUFFER_MSGDATA ) {
110  if ( data == NULL )
111   return -1;
112
113  mesdata = malloc(needlen);
114
115  if ( mesdata == NULL )
116   return -1;
117
118  *data = mesdata;
119 } else {
120  mesdata = mes->data;
121 }
122
123 memset(mes, 0, sizeof(struct roar_message));
124
125 mes->datalen = needlen;
126
127 d16 = (uint16_t*)mesdata;
128
129 mesdata[0] = 0; // version
130 mesdata[1] = 0; // reserved
131
132 d16[1] = ROAR_HOST2NET16(idx);
133
134 dptr = &(d16[2]);
135
136 for (i = 0; i < idx; i++) {
137  dptr[0] = ROAR_HOST2NET16(iebuf[i].type & 0xFF);
138  dptr[1] = ROAR_HOST2NET16(iebuf[i].len);
139  dptr += 2;
140 }
141
142 textpart = mesdata + (4 + 4*idx);
143
144 for (i = 0; i < idx; i++) {
145  memcpy(textpart, iebuf[i].buf, iebuf[i].len);
146  textpart += iebuf[i].len;
147 }
148
149 return 0;
150}
151
152struct roar_server_info * roar_server_info_from_mes(struct roar_message * mes, void * data) {
153 struct ie iebuf[sizeof(struct roar_server_info)/sizeof(char*)];
154 struct ie * ieptr;
155 struct roar_server_info * ret = NULL;
156 uint16_t * d16, * dptr;
157 int idx;
158 int i;
159 size_t needlen = 4;
160 char * textpart;
161 char * textbuf;
162 char ** tptr;
163 char * mesdata;
164
165 ROAR_DBG("roar_server_info(mes=%p{.datalen=%llu) = ?", mes, (long long unsigned int)mes->datalen);
166
167 if ( mes == NULL )
168  return NULL;
169
170 if ( data == NULL ) {
171  mesdata = mes->data;
172 } else {
173  mesdata = data;
174 }
175
176 memset(iebuf, 0, sizeof(iebuf));
177
178 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
179
180 // some basic texts like version:
181 if ( mes->datalen < needlen )
182  return NULL;
183
184 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
185
186 if ( mesdata[0] != 0 ) /* version */
187  return NULL;
188
189 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
190
191 if ( mesdata[1] != 0 ) /* reserved */
192  return NULL;
193
194 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
195
196 d16 = (uint16_t*)mesdata;
197
198 idx = ROAR_NET2HOST16(d16[1]);
199
200 ROAR_DBG("roar_server_info(mes=%p): idx=%i", mes, idx);
201
202 // return error if our index buffer is too short.
203 if ( idx > (sizeof(iebuf)/sizeof(*iebuf)) )
204  return NULL;
205
206 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
207
208 ROAR_DBG("roar_server_info(mes=%p): needlen=%llu", mes, (long long unsigned int)needlen);
209
210 needlen += 4*idx;
211
212 // recheck if we have a complet index.
213 if ( mes->datalen < needlen )
214  return NULL;
215
216 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
217
218 d16 = (uint16_t*)mesdata;
219 dptr = &(d16[2]);
220
221 textpart = mesdata + (4 + 4*idx);
222
223 ROAR_DBG("roar_server_info(mes=%p): needlen=%llu", mes, (long long unsigned int)needlen);
224
225 for (i = 0; i < idx; i++) {
226  iebuf[i].type = ROAR_NET2HOST16(dptr[0]) & 0xFF;
227  iebuf[i].len  = ROAR_NET2HOST16(dptr[1]);
228  iebuf[i].buf  = textpart;
229  needlen  += iebuf[i].len;
230  textpart += iebuf[i].len;
231  dptr += 2;
232  ROAR_DBG("roar_server_info(mes=%p): iebuf[i]={.len=%llu,...}", mes, (long long unsigned int)iebuf[i].len);
233 }
234
235 ROAR_DBG("roar_server_info(mes=%p): needlen=%llu", mes, (long long unsigned int)needlen);
236
237 // recheck if we have all the data...
238 if ( mes->datalen < needlen )
239  return NULL;
240
241 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
242
243 // alloc the needed space. this can be reduced in future to the actual needed value.
244 ret = roar_mm_malloc(2*sizeof(struct roar_server_info) + mes->datalen);
245
246 if ( ret == NULL )
247  return NULL;
248
249 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
250
251 // for the size see the alloc call above.
252 memset(ret, 0, 2*sizeof(struct roar_server_info) + mes->datalen);
253
254 textbuf = (char*)ret + sizeof(struct roar_server_info);
255
256 for (i = 0; i < idx; i++) {
257  ieptr = &(iebuf[i]);
258
259   // ignore empty fields
260  if ( ieptr->len == 0 )
261   continue;
262  if ( ieptr->len == 1 && ieptr->buf[0] == 0 )
263   continue;
264
265#define _ck(TYPE,member) case TYPE: tptr = &(ret->member); break;
266  switch (ieptr->type) {
267   _ck(ROAR_ITST_VERSION, version);
268   _ck(ROAR_ITST_LOCATION, location);
269   _ck(ROAR_ITST_DESCRIPTION, description);
270   _ck(ROAR_ITST_CONTACT, contact);
271   _ck(ROAR_ITST_SERIAL, serial);
272   _ck(ROAR_ITST_ADDRESS, address);
273   _ck(ROAR_ITST_UIURL, uiurl);
274   _ck(ROAR_ITST_UN_SYSNAME, un.sysname);
275   _ck(ROAR_ITST_UN_RELEASE, un.release);
276   _ck(ROAR_ITST_UN_NODENAME, un.nodename);
277   _ck(ROAR_ITST_UN_MACHINE, un.machine);
278   default:
279     continue;
280    break;
281  }
282#undef _ck
283
284  *tptr = textbuf;
285   memcpy(textbuf, ieptr->buf, ieptr->len);
286   textbuf += ieptr->len;
287   *textbuf = 0; // set \0
288   textbuf++;
289 }
290
291 ROAR_DBG("roar_server_info(mes=%p) = %p", mes, ret);
292
293 return ret;
294}
295
296
297//ll
Note: See TracBrowser for help on using the repository browser.