1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Ouroboros - Copyright (C) 2016
*
* Protocol Control Information
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "pci.h"
#include <malloc.h>
#include <errno.h>
#define head_size(a, b) a.addr_size * 2 + \
a.cep_id_size * 2 + \
a.pdu_length_size + \
a.seqno_size + \
a.qos_id_size + \
b.ttl_size
#define tail_size(b) b.chk_size
struct pci {
/* head */
uint8_t * dst_addr;
uint8_t * src_addr;
uint8_t * dst_cep_id;
uint8_t * src_cep_id;
uint8_t * pdu_length;
uint8_t * ttl; uint8_t * seqno;
uint8_t * qos_id;
uint8_t * chk;
du_buff_t * dub;
struct ipcp_dtp_const dtpc;
struct ipcp_dup_const dupc;
};
pci_t * pci_create(du_buff_t * dub,
const struct ipcp_dtp_const dtpc,
const struct ipcp_dup_const dupc)
{
if (dub == NULL) {
LOG_DBGF("Bogus input. Bugging out.");
return NULL;
}
struct pci * p = malloc(sizeof *p);
if (p == NULL)
return NULL;
p->dub = dub;
/*
p->dtpc = malloc( sizeof *(p->dtpc));
if (p->dtpc == NULL)
return NULL;
p->dupc = malloc( sizeof *(p->dupc));
if (p->dupc == NULL)
return NULL;
*/
p->dtpc = dtpc;
p->dupc = dupc;
p->dst_addr = NULL;
p->src_addr =NULL;
p->dst_cep_id = NULL;
p->src_cep_id = NULL;
p->pdu_length = NULL;
p->ttl = NULL;
p->seqno = NULL;
p->qos_id = NULL;
p->chk = NULL;
return p;
}
void pci_destroy(pci_t * pci)
{
free (pci);
}
int pci_init(pci_t * pci)
{
if (pci == NULL) {
LOG_DBGF("Bogus input. Bugging out.");
return -EINVAL;
}
uint8_t * pci_head = du_buff_head_alloc(pci->dub,
head_size(pci->dtpc,pci->dupc));
uint8_t * pci_tail = du_buff_tail_alloc(pci->dub, tail_size(pci->dupc));
if (pci_head == NULL) {
LOG_DBG("Failed to allocate space for PCI at head.");
return -ENOBUFS;
}
if (pci_tail == NULL) {
LOG_DBG("Failed to allocate space for PCI at tail.");
return -ENOBUFS;
}
pci->dst_addr = pci_head;
pci->src_addr = (pci_head += pci->dtpc.addr_size);
pci->dst_cep_id = (pci_head += pci->dtpc.addr_size);
pci->src_cep_id = (pci_head += pci->dtpc.cep_id_size);
pci->pdu_length = (pci_head += pci->dtpc.cep_id_size);
pci->ttl = (pci_head += pci->dtpc.pdu_length_size);
pci->seqno = (pci_head += pci->dupc.ttl_size);
pci->qos_id = (pci_head += pci->dtpc.seqno_size);
pci->chk = (pci_tail);
return 0;
}
void pci_release(pci_t * pci)
{
if (pci == NULL)
return;
if (pci->dub == NULL)
return;
du_buff_head_release(pci->dub, head_size(pci->dtpc, pci->dupc));
du_buff_tail_release(pci->dub, tail_size(pci->dupc));
}
|
