-
Notifications
You must be signed in to change notification settings - Fork 1
/
test_gai.c
185 lines (165 loc) · 5.15 KB
/
test_gai.c
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
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>
#include <arpa/inet.h>
#include <iothdns.h>
static char *sst(int socktype) {
switch (socktype) {
case SOCK_STREAM: return "SOCK_STREAM";
case SOCK_DGRAM: return "SOCK_DGRAM";
case SOCK_RAW: return "SOCK_RAW";
case SOCK_SEQPACKET: return "SOCK_SEQPACKET";
default: return"SOCK_UNKNOWN";
}
}
static void usage(char *progname) {
fprintf(stderr, "Usage: %s [options] host port\n"
"\t-r --rev\n"
"\t-R resolvconf_file --resolvconf resolvconf_file\n"
"\t-x --native\n"
"\t-4 --ipv4\n"
"\t-6 --ipv6\n"
"\t-d --dgram\n"
"\t-s --stream\n"
"\t-m --v4mapped\n"
"\t-a --all\n"
"\t-p --passive\n"
"\t-c --canonname\n"
"\t-n --numerichost\n"
"\t-N --numericserv\n"
"\t-e --errnoname\n"
, progname);
exit(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
static struct addrinfo hints;
static char *shortopts = "rx46dsmapcnNeR:";
static struct option longopts[] = {
{"rev", no_argument, 0, 'r'},
{"resolvconf", required_argument, 0, 'R'},
{"native", no_argument, 0, 'x'},
{"ipv4", no_argument, 0, '4'},
{"ipv6", no_argument, 0, '6'},
{"dgram", no_argument, 0, 'd'},
{"stream", no_argument, 0, 's'},
{"v4mapped", no_argument, 0, 'm'},
{"all", no_argument, 0, 'a'},
{"passive", no_argument, 0, 'p'},
{"canonname", no_argument, 0, 'c'},
{"numerichost", no_argument, 0, 'n'},
{"numericserv", no_argument, 0, 'N'},
{"errnoname", no_argument, 0, 'e'},
{0, 0, 0, 0}};
static char *default_ns =
"search v2.cs.unibo.it cs.unibo.it\n"
"nameserver 8.8.8.8";
char *resolvconf = NULL;
int rev = 0;
int opt = 0;
int native = 0;
int revflags = 0;
while((opt = getopt_long(argc, argv, shortopts, longopts, NULL)) > 0) {
switch(opt) {
case 'r': rev = 1; break;
case 'R': resolvconf = optarg; break;
case 'x': native = 1; break;
case '4': hints.ai_family = AF_INET; break;
case '6': hints.ai_family = AF_INET6; break;
case 'd': hints.ai_socktype = SOCK_DGRAM; revflags |= NI_DGRAM; break;
case 's': hints.ai_socktype = SOCK_STREAM; break;
case 'm': hints.ai_flags |= AI_V4MAPPED; break;
case 'a': hints.ai_flags |= AI_ALL; break;
case 'p': hints.ai_flags |= AI_PASSIVE; break;
case 'c': hints.ai_flags |= AI_CANONNAME; break;
case 'n': hints.ai_flags |= AI_NUMERICHOST; revflags |= NI_NUMERICHOST; break;
case 'N': hints.ai_flags |= AI_NUMERICSERV; revflags |= NI_NUMERICSERV; break;
case 'e': revflags |= NI_NAMEREQD; break;
default: usage(argv[0]);
}
}
if (argc - optind != 2)
usage(argv[0]);
char *hostarg = argv[optind];
char *portarg = argv[optind + 1];
if (hostarg[0] == 0) hostarg = NULL;
if (portarg[0] == 0) portarg = NULL;
struct iothdns *ns = NULL;
if (native == 0) {
if (resolvconf)
ns = iothdns_init(NULL, resolvconf);
else
ns = iothdns_init_strcfg(NULL, default_ns);
}
if (rev) {
static struct sockaddr_storage addr;
int port = atoi(portarg);
unsigned char testaddr[sizeof(struct in6_addr)];
if (inet_pton(AF_INET, hostarg, testaddr) == 1) {
struct sockaddr_in *s = (void *) &addr;
s->sin_family = AF_INET;
s->sin_port = htons(port);
memcpy(&s->sin_addr, testaddr, sizeof(s->sin_addr));
}
if (inet_pton(AF_INET6, hostarg, testaddr) == 1) {
struct sockaddr_in6 *s = (void *) &addr;
s->sin6_family = AF_INET6;
s->sin6_port = htons(port);
memcpy(&s->sin6_addr, testaddr, sizeof(s->sin6_addr));
}
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
int s;
if (ns == NULL)
s = getnameinfo((void *) &addr, sizeof(addr), hbuf, sizeof(hbuf), sbuf,
sizeof(sbuf), revflags);
else
s = iothdns_getnameinfo(ns, (void *) &addr, sizeof(addr), hbuf, sizeof(hbuf), sbuf,
sizeof(sbuf), revflags);
if (s == 0)
printf("host=%s, serv=%s\n", hbuf, sbuf);
} else {
struct addrinfo *result, *rp;
int s;
/* Obtain address(es) matching host/port */
if (ns == NULL)
s = getaddrinfo(hostarg, portarg, &hints, &result);
else
s = iothdns_getaddrinfo(ns, hostarg, portarg, &hints, &result);
if (s != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
exit(EXIT_FAILURE);
}
/* getaddrinfo() returns a list of address structures. */
for (rp = result; rp != NULL; rp = rp->ai_next) {
char str[INET6_ADDRSTRLEN];
struct sockaddr_in *s4 = (void *) rp->ai_addr;
struct sockaddr_in6 *s6 = (void *) rp->ai_addr;
switch(rp->ai_family) {
case AF_INET:
printf("IPv4 %s addr: %s port %d proto %d\n",
sst(rp->ai_socktype),
inet_ntop(rp->ai_family, &s4->sin_addr, str, INET6_ADDRSTRLEN),
ntohs(s4->sin_port), rp->ai_protocol);
if (rp->ai_canonname) printf("canon %s\n", rp->ai_canonname);
break;
case AF_INET6:
printf("IPv6 %s addr: %s port %d proto %d\n",
sst(rp->ai_socktype),
inet_ntop(rp->ai_family, &s6->sin6_addr, str, INET6_ADDRSTRLEN),
ntohs(s6->sin6_port), rp->ai_protocol);
if (rp->ai_canonname) printf("canon %s\n", rp->ai_canonname);
break;
default:
printf("unknown family\n");
}
}
freeaddrinfo(result); /* No longer needed */
exit(EXIT_SUCCESS);
}
}