4 /* (C) 2008 by Harald Welte <laforge@gnumonks.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include "linuxlist.h"
29 struct llist_head list;
31 /* ptr to the physical E1 link to the BTS(s) */
32 struct gsm_bts_link *bts_link;
34 /* Part of which TRX logical channel we were received / transmitted */
35 struct gsm_bts_trx *trx;
36 struct gsm_lchan *lchan;
38 /* the A-bis layer 2 header: OML, RSL(RLL), NS */
40 /* the layer 3 header. For OML: FOM; RSL: 04.08; GPRS: BSSGP */
43 /* the layer 4 header */
49 /* the layer 5 header, GPRS: GMM header */
59 unsigned char _data[0];
62 extern struct msgb *msgb_alloc(uint16_t size, const char *name);
63 extern void msgb_free(struct msgb *m);
64 extern void msgb_enqueue(struct llist_head *queue, struct msgb *msg);
65 extern struct msgb *msgb_dequeue(struct llist_head *queue);
66 extern void msgb_reset(struct msgb *m);
68 #define msgb_l2(m) ((void *)(m->l2h))
69 #define msgb_l3(m) ((void *)(m->l3h))
70 #define msgb_sms(m) ((void *)(m->smsh))
72 static inline unsigned int msgb_l2len(const struct msgb *msgb)
74 return msgb->tail - (uint8_t *)msgb_l2(msgb);
77 static inline unsigned int msgb_l3len(const struct msgb *msgb)
79 return msgb->tail - (uint8_t *)msgb_l3(msgb);
82 static inline unsigned int msgb_headlen(const struct msgb *msgb)
84 return msgb->len - msgb->data_len;
86 static inline unsigned char *msgb_put(struct msgb *msgb, unsigned int len)
88 unsigned char *tmp = msgb->tail;
93 static inline unsigned char *msgb_push(struct msgb *msgb, unsigned int len)
99 static inline unsigned char *msgb_pull(struct msgb *msgb, unsigned int len)
102 return msgb->data += len;
104 static inline int msgb_tailroom(const struct msgb *msgb)
106 return (msgb->head + msgb->data_len) - msgb->tail;
109 /* increase the headroom of an empty msgb, reducing the tailroom */
110 static inline void msgb_reserve(struct msgb *msg, int len)
116 static inline struct msgb *msgb_alloc_headroom(int size, int headroom,
119 struct msgb *msg = msgb_alloc(size, name);
121 msgb_reserve(msg, headroom);