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
148
149
|
/* $OpenBSD: pptp_subr.c,v 1.3 2010/07/02 21:20:57 yasuoka Exp $ */
/*-
* Copyright (c) 2009 Internet Initiative Japan Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* utility functions for the pptp.c */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <event.h>
#include "bytebuf.h"
#include "hash.h"
#include "slist.h"
#include "pptp.h"
#include "pptp_local.h"
#include "pptp_subr.h"
/* convert the Faming Capability bit as CSV strings */
const char *
pptp_framing_string(uint32_t bits)
{
static char framing_cap_buf[40];
snprintf(framing_cap_buf, sizeof(framing_cap_buf), "%s%s",
(bits & PPTP_CTRL_FRAMING_ASYNC)? ",async" : "",
(bits & PPTP_CTRL_FRAMING_SYNC)? ",sync" : "");
if (strlen(framing_cap_buf) > 0)
return &framing_cap_buf[1];
return "";
}
/* convert the Bearer Capability bit as CSV strings */
const char *
pptp_bearer_string(uint32_t bits)
{
static char bearer_cap_buf[40];
snprintf(bearer_cap_buf, sizeof(bearer_cap_buf), "%s%s",
(bits &PPTP_CTRL_BEARER_ANALOG)? ",analog" : "",
(bits &PPTP_CTRL_BEARER_DIGITAL)? ",digital" : "");
if (strlen(bearer_cap_buf) > 0)
return &bearer_cap_buf[1];
return "";
}
/* build common header part of a control packet */
void
pptp_init_header(struct pptp_ctrl_header *header, int length, int ctrl_mes_type)
{
header->length = htons(length);
header->pptp_message_type = htons(PPTP_MES_TYPE_CTRL);
header->magic_cookie = htonl(PPTP_MAGIC_COOKIE);
header->control_message_type = htons(ctrl_mes_type);
header->reserved0 = 0;
}
#define NAME_VAL(x) { x, #x }
static struct _label_name {
int label;
const char *name;
} pptp_StopCCRQ_reason_labels[] = {
NAME_VAL(PPTP_StopCCRQ_REASON_NONE),
NAME_VAL(PPTP_StopCCRQ_REASON_STOP_PROTOCOL),
NAME_VAL(PPTP_StopCCRQ_REASON_STOP_LOCAL_SHUTDOWN),
}, pptp_StopCCRP_result_labels[] = {
NAME_VAL(PPTP_StopCCRP_RESULT_OK),
NAME_VAL(PPTP_StopCCRP_RESULT_GENERIC_ERROR),
}, pptp_general_error_labels[] = {
NAME_VAL(PPTP_ERROR_NONE),
NAME_VAL(PPTP_ERROR_NOT_CONNECTED),
NAME_VAL(PPTP_ERROR_BAD_FORMAT),
NAME_VAL(PPTP_ERROR_NO_RESOURCE),
NAME_VAL(PPTP_ERROR_BAD_CALL),
}, pptp_ctrl_mes_type_labels[] = {
NAME_VAL(PPTP_CTRL_MES_CODE_SCCRQ),
NAME_VAL(PPTP_CTRL_MES_CODE_SCCRP),
NAME_VAL(PPTP_CTRL_MES_CODE_StopCCRQ),
NAME_VAL(PPTP_CTRL_MES_CODE_StopCCRP),
NAME_VAL(PPTP_CTRL_MES_CODE_ECHO_RQ),
NAME_VAL(PPTP_CTRL_MES_CODE_ECHO_RP),
NAME_VAL(PPTP_CTRL_MES_CODE_OCRQ),
NAME_VAL(PPTP_CTRL_MES_CODE_OCRP),
NAME_VAL(PPTP_CTRL_MES_CODE_ICRQ),
NAME_VAL(PPTP_CTRL_MES_CODE_ICRP),
NAME_VAL(PPTP_CTRL_MES_CODE_ICCN),
NAME_VAL(PPTP_CTRL_MES_CODE_CCR),
NAME_VAL(PPTP_CTRL_MES_CODE_CDN),
NAME_VAL(PPTP_CTRL_MES_CODE_SLI),
}, pptp_CDN_result_labels[] = {
NAME_VAL(PPTP_CDN_RESULT_LOST_CARRIER),
NAME_VAL(PPTP_CDN_RESULT_GENRIC_ERROR),
NAME_VAL(PPTP_CDN_RESULT_ADMIN_SHUTDOWN),
NAME_VAL(PPTP_CDN_RESULT_REQUEST),
};
/* value to strings convert macros */
#define LABEL_TO_STRING(func_name, label_names, prefix_len) \
const char * \
func_name(int code) \
{ \
int i; \
\
for (i = 0; i < countof(label_names); i++) { \
if (label_names[i].label == code) \
return label_names[i].name + prefix_len;\
} \
\
return "UNKNOWN"; \
}
LABEL_TO_STRING(pptp_StopCCRQ_reason_string, pptp_StopCCRQ_reason_labels, 21)
LABEL_TO_STRING(pptp_StopCCRP_result_string, pptp_StopCCRP_result_labels, 21)
LABEL_TO_STRING(pptp_general_error_string, pptp_general_error_labels, 11)
LABEL_TO_STRING(pptp_ctrl_mes_type_string, pptp_ctrl_mes_type_labels, 19)
LABEL_TO_STRING(pptp_CDN_result_string, pptp_CDN_result_labels, 16)
|
