source: roaraudio/libroar/serverinfo.c @ 4440:970fdb88487b

Last change on this file since 4440:970fdb88487b was 4440:970fdb88487b, checked in by phi, 13 years ago

added support for lage messages

File size: 7.3 KB
Line 
1//serverinfo.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 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
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 } else {
118  mesdata = mes->data;
119 }
120
121 memset(mes, 0, sizeof(struct roar_message));
122
123 mes->datalen = needlen;
124
125 d16 = (uint16_t*)mesdata;
126
127 mesdata[0] = 0; // version
128 mesdata[1] = 0; // reserved
129
130 d16[1] = ROAR_HOST2NET16(idx);
131
132 dptr = &(d16[2]);
133
134 for (i = 0; i < idx; i++) {
135  dptr[0] = ROAR_HOST2NET16(iebuf[i].type & 0xFF);
136  dptr[1] = ROAR_HOST2NET16(iebuf[i].len);
137  dptr += 2;
138 }
139
140 textpart = mesdata + (4 + 4*idx);
141
142 for (i = 0; i < idx; i++) {
143  memcpy(textpart, iebuf[i].buf, iebuf[i].len);
144  textpart += iebuf[i].len;
145 }
146
147 return 0;
148}
149
150struct roar_server_info * roar_server_info_from_mes(struct roar_message * mes, void * data) {
151 struct ie iebuf[sizeof(struct roar_server_info)/sizeof(char*)];
152 struct ie * ieptr;
153 struct roar_server_info * ret = NULL;
154 uint16_t * d16, * dptr;
155 int idx;
156 int i;
157 size_t needlen = 4;
158 char * textpart;
159 char * textbuf;
160 char ** tptr;
161 char * mesdata;
162
163 ROAR_DBG("roar_server_info(mes=%p{.datalen=%llu) = ?", mes, (long long unsigned int)mes->datalen);
164
165 if ( mes == NULL )
166  return NULL;
167
168 if ( data == NULL ) {
169  mesdata = mes->data;
170 } else {
171  mesdata = data;
172 }
173
174 memset(iebuf, 0, sizeof(iebuf));
175
176 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
177
178 // some basic texts like version:
179 if ( mes->datalen < needlen )
180  return NULL;
181
182 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
183
184 if ( mesdata[0] != 0 ) /* version */
185  return NULL;
186
187 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
188
189 if ( mesdata[1] != 0 ) /* reserved */
190  return NULL;
191
192 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
193
194 d16 = (uint16_t*)mesdata;
195
196 idx = ROAR_NET2HOST16(d16[1]);
197
198 ROAR_DBG("roar_server_info(mes=%p): idx=%i", mes, idx);
199
200 // return error if our index buffer is too short.
201 if ( idx > (sizeof(iebuf)/sizeof(*iebuf)) )
202  return NULL;
203
204 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
205
206 ROAR_DBG("roar_server_info(mes=%p): needlen=%llu", mes, (long long unsigned int)needlen);
207
208 needlen += 4*idx;
209
210 // recheck if we have a complet index.
211 if ( mes->datalen < needlen )
212  return NULL;
213
214 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
215
216 d16 = (uint16_t*)mesdata;
217 dptr = &(d16[2]);
218
219 textpart = mesdata + (4 + 4*idx);
220
221 ROAR_DBG("roar_server_info(mes=%p): needlen=%llu", mes, (long long unsigned int)needlen);
222
223 for (i = 0; i < idx; i++) {
224  iebuf[i].type = ROAR_NET2HOST16(dptr[0]) & 0xFF;
225  iebuf[i].len  = ROAR_NET2HOST16(dptr[1]);
226  iebuf[i].buf  = textpart;
227  needlen  += iebuf[i].len;
228  textpart += iebuf[i].len;
229  dptr += 2;
230  ROAR_DBG("roar_server_info(mes=%p): iebuf[i]={.len=%llu,...}", mes, (long long unsigned int)iebuf[i].len);
231 }
232
233 ROAR_DBG("roar_server_info(mes=%p): needlen=%llu", mes, (long long unsigned int)needlen);
234
235 // recheck if we have all the data...
236 if ( mes->datalen < needlen )
237  return NULL;
238
239 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
240
241 // alloc the needed space. this can be reduced in future to the actual needed value.
242 ret = roar_mm_malloc(2*sizeof(struct roar_server_info) + mes->datalen);
243
244 if ( ret == NULL )
245  return NULL;
246
247 ROAR_DBG("roar_server_info(mes=%p) = ?", mes);
248
249 // for the size see the alloc call above.
250 memset(ret, 0, 2*sizeof(struct roar_server_info) + mes->datalen);
251
252 textbuf = (char*)ret + sizeof(struct roar_server_info);
253
254 for (i = 0; i < idx; i++) {
255  ieptr = &(iebuf[i]);
256
257   // ignore empty fields
258  if ( ieptr->len == 0 )
259   continue;
260  if ( ieptr->len == 1 && ieptr->buf[0] == 0 )
261   continue;
262
263#define _ck(TYPE,member) case TYPE: tptr = &(ret->member); break;
264  switch (ieptr->type) {
265   _ck(ROAR_ITST_VERSION, version);
266   _ck(ROAR_ITST_LOCATION, location);
267   _ck(ROAR_ITST_DESCRIPTION, description);
268   _ck(ROAR_ITST_CONTACT, contact);
269   _ck(ROAR_ITST_SERIAL, serial);
270   _ck(ROAR_ITST_ADDRESS, address);
271   _ck(ROAR_ITST_UIURL, uiurl);
272   _ck(ROAR_ITST_UN_SYSNAME, un.sysname);
273   _ck(ROAR_ITST_UN_RELEASE, un.release);
274   _ck(ROAR_ITST_UN_NODENAME, un.nodename);
275   _ck(ROAR_ITST_UN_MACHINE, un.machine);
276   default:
277     continue;
278    break;
279  }
280#undef _ck
281
282  *tptr = textbuf;
283   memcpy(textbuf, ieptr->buf, ieptr->len);
284   textbuf += ieptr->len;
285   *textbuf = 0; // set \0
286   textbuf++;
287 }
288
289 ROAR_DBG("roar_server_info(mes=%p) = %p", mes, ret);
290
291 return ret;
292}
293
294
295//ll
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