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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/* Convert struct addrinfo values to a string.
Copyright (C) 2016-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <support/format_nss.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/support.h>
#include <support/xmemstream.h>
static size_t
socket_address_length (int family)
{
switch (family)
{
case AF_INET:
return sizeof (struct sockaddr_in);
case AF_INET6:
return sizeof (struct sockaddr_in6);
default:
return -1;
}
}
static void
format_ai_flags_1 (FILE *out, struct addrinfo *ai, int flag, const char *name,
int * flags_printed)
{
if ((ai->ai_flags & flag) != 0)
fprintf (out, " %s", name);
*flags_printed |= flag;
}
static void
format_ai_flags (FILE *out, struct addrinfo *ai)
{
if (ai == NULL)
return;
if (ai->ai_flags != 0)
{
fprintf (out, "flags:");
int flags_printed = 0;
#define FLAG(flag) format_ai_flags_1 (out, ai, flag, #flag, &flags_printed)
FLAG (AI_PASSIVE);
FLAG (AI_CANONNAME);
FLAG (AI_NUMERICHOST);
FLAG (AI_V4MAPPED);
FLAG (AI_ALL);
FLAG (AI_ADDRCONFIG);
FLAG (AI_IDN);
FLAG (AI_CANONIDN);
FLAG (AI_NUMERICSERV);
#undef FLAG
int remaining = ai->ai_flags & ~flags_printed;
if (remaining != 0)
fprintf (out, " %08x", remaining);
fprintf (out, "\n");
}
/* Report flag mismatches within the list. */
int flags = ai->ai_flags;
int index = 1;
ai = ai->ai_next;
while (ai != NULL)
{
if (ai->ai_flags != flags)
fprintf (out, "error: flags at %d: 0x%x expected, 0x%x actual\n",
index, flags, ai->ai_flags);
ai = ai->ai_next;
++index;
}
}
static void
format_ai_canonname (FILE *out, struct addrinfo *ai)
{
if (ai == NULL)
return;
if (ai->ai_canonname != NULL)
fprintf (out, "canonname: %s\n", ai->ai_canonname);
/* Report incorrectly set ai_canonname fields on subsequent list
entries. */
int index = 1;
ai = ai->ai_next;
while (ai != NULL)
{
if (ai->ai_canonname != NULL)
fprintf (out, "error: canonname set at %d: %s\n",
index, ai->ai_canonname);
ai = ai->ai_next;
++index;
}
}
static void
format_ai_one (FILE *out, struct addrinfo *ai)
{
{
char type_buf[32];
const char *type_str;
char proto_buf[32];
const char *proto_str;
/* ai_socktype */
switch (ai->ai_socktype)
{
case SOCK_RAW:
type_str = "RAW";
break;
case SOCK_DGRAM:
type_str = "DGRAM";
break;
case SOCK_STREAM:
type_str = "STREAM";
break;
default:
snprintf (type_buf, sizeof (type_buf), "%d", ai->ai_socktype);
type_str = type_buf;
}
/* ai_protocol */
switch (ai->ai_protocol)
{
case IPPROTO_IP:
proto_str = "IP";
break;
case IPPROTO_UDP:
proto_str = "UDP";
break;
case IPPROTO_TCP:
proto_str = "TCP";
break;
default:
snprintf (proto_buf, sizeof (proto_buf), "%d", ai->ai_protocol);
proto_str = proto_buf;
}
fprintf (out, "address: %s/%s", type_str, proto_str);
}
/* ai_addrlen */
if (ai->ai_addrlen != socket_address_length (ai->ai_family))
{
char *family = support_format_address_family (ai->ai_family);
fprintf (out, "error: invalid address length %d for %s\n",
ai->ai_addrlen, family);
free (family);
}
/* ai_addr */
{
char buf[128];
uint16_t port;
const char *ret;
switch (ai->ai_family)
{
case AF_INET:
{
struct sockaddr_in *sin = (struct sockaddr_in *) ai->ai_addr;
ret = inet_ntop (AF_INET, &sin->sin_addr, buf, sizeof (buf));
port = sin->sin_port;
}
break;
case AF_INET6:
{
struct sockaddr_in6 *sin = (struct sockaddr_in6 *) ai->ai_addr;
ret = inet_ntop (AF_INET6, &sin->sin6_addr, buf, sizeof (buf));
port = sin->sin6_port;
}
break;
default:
errno = EAFNOSUPPORT;
ret = NULL;
}
if (ret == NULL)
fprintf (out, "error: inet_top failed: %m\n");
else
fprintf (out, " %s %u\n", buf, ntohs (port));
}
}
/* Format all the addresses in one address family. */
static void
format_ai_family (FILE *out, struct addrinfo *ai, int family)
{
while (ai)
{
if (ai->ai_family == family)
format_ai_one (out, ai);
ai = ai->ai_next;
}
}
char *
support_format_addrinfo (struct addrinfo *ai, int ret)
{
int errno_copy = errno;
struct xmemstream mem;
xopen_memstream (&mem);
if (ret != 0)
{
const char *errmsg = gai_strerror (ret);
if (strcmp (errmsg, "Unknown error") == 0)
fprintf (mem.out, "error: Unknown error %d\n", ret);
else
fprintf (mem.out, "error: %s\n", errmsg);
if (ret == EAI_SYSTEM)
{
errno = errno_copy;
fprintf (mem.out, "error: %m\n");
}
}
else
{
format_ai_flags (mem.out, ai);
format_ai_canonname (mem.out, ai);
format_ai_family (mem.out, ai, AF_INET);
format_ai_family (mem.out, ai, AF_INET6);
}
xfclose_memstream (&mem);
return mem.buffer;
}
|
