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
|
/*
* Copyright (C) 2006-2008 Stig Venaas <venaas@uninett.no>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include "debug.h"
#if 0
#include <errno.h>
void errx(char *format, ...) {
extern int errno;
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
if (errno) {
fprintf(stderr, ": ");
perror(NULL);
fprintf(stderr, "errno=%d\n", errno);
} else
fprintf(stderr, "\n");
exit(1);
}
void err(char *format, ...) {
extern int errno;
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
if (errno) {
fprintf(stderr, ": ");
perror(NULL);
fprintf(stderr, "errno=%d\n", errno);
} else
fprintf(stderr, "\n");
}
#endif
char *stringcopy(const char *s, int len) {
char *r;
if (!len)
len = strlen(s);
r = malloc(len + 1);
if (!r)
debug(DBG_ERR, "stringcopy: malloc failed");
memcpy(r, s, len);
r[len] = '\0';
return r;
}
void printfchars(char *prefixfmt, char *prefix, char *charfmt, char *chars, int len) {
int i;
unsigned char *s = (unsigned char *)chars;
if (prefix)
printf(prefixfmt ? prefixfmt : "%s: ", prefix);
for (i = 0; i < len; i++)
printf(charfmt ? charfmt : "%c", s[i]);
printf("\n");
}
char *addr2string(struct sockaddr *addr, socklen_t len) {
struct sockaddr_in6 *sa6;
struct sockaddr_in sa4;
static char addr_buf[2][INET6_ADDRSTRLEN];
static int i = 0;
i = !i;
if (addr->sa_family == AF_INET6) {
sa6 = (struct sockaddr_in6 *)addr;
if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
sa4.sin_port = sa6->sin6_port;
memcpy(&sa4.sin_addr, &sa6->sin6_addr.s6_addr[12], 4);
addr = (struct sockaddr *)&sa4;
}
}
len = addr->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6);
if (getnameinfo(addr, len, addr_buf[i], sizeof(addr_buf[i]),
NULL, 0, NI_NUMERICHOST)) {
debug(DBG_WARN, "getnameinfo failed");
return "getnameinfo_failed";
}
return addr_buf[i];
}
int bindtoaddr(struct addrinfo *addrinfo, int family, int reuse, int v6only) {
int s, on = 1;
struct addrinfo *res;
for (res = addrinfo; res; res = res->ai_next) {
if (family != AF_UNSPEC && family != res->ai_family)
continue;
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
debug(DBG_WARN, "bindtoaddr: socket failed");
continue;
}
if (reuse)
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
#ifdef IPV6_V6ONLY
if (v6only)
setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
#endif
if (!bind(s, res->ai_addr, res->ai_addrlen))
return s;
debug(DBG_WARN, "bindtoaddr: bind failed");
close(s);
}
return -1;
}
int connectport(int type, char *host, char *port) {
struct addrinfo hints, *res0, *res;
int s = -1;
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = type;
hints.ai_family = AF_UNSPEC;
if (getaddrinfo(host, port, &hints, &res0) != 0) {
debug(DBG_ERR, "connectport: can't resolve host %s port %s", host, port);
return -1;
}
for (res = res0; res; res = res->ai_next) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
debug(DBG_WARN, "connectport: socket failed");
continue;
}
if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
break;
debug(DBG_WARN, "connectport: connect failed");
close(s);
s = -1;
}
freeaddrinfo(res0);
return s;
}
|
