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
|
#include "../config.h"
#ifdef HAVE_SYS_SOCKET_H
#include <osmocom/core/logging.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <ifaddrs.h>
int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto,
const char *host, uint16_t port, unsigned int flags)
{
struct addrinfo hints, *result, *rp;
int sfd, rc, on = 1;
char portbuf[16];
if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) ==
(OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT))
return -EINVAL;
sprintf(portbuf, "%u", port);
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = family;
hints.ai_socktype = type;
hints.ai_flags = 0;
hints.ai_protocol = proto;
if (flags & OSMO_SOCK_F_BIND)
hints.ai_flags |= AI_PASSIVE;
rc = getaddrinfo(host, portbuf, &hints, &result);
if (rc != 0) {
perror("getaddrinfo returned NULL");
return -EINVAL;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if (sfd == -1)
continue;
if (flags & OSMO_SOCK_F_NONBLOCK) {
if (ioctl(sfd, FIONBIO, (unsigned char *)&on) < 0) {
perror("cannot set this socket unblocking");
close(sfd);
return -EINVAL;
}
}
if (flags & OSMO_SOCK_F_CONNECT) {
rc = connect(sfd, rp->ai_addr, rp->ai_addrlen);
if (rc != -1 || (rc == -1 && errno == EINPROGRESS))
break;
} else {
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
&on, sizeof(on));
if (rc < 0) {
perror("cannot setsockopt socket");
break;
}
if (bind(sfd, rp->ai_addr, rp->ai_addrlen) != -1)
break;
}
close(sfd);
}
freeaddrinfo(result);
if (rp == NULL) {
perror("unable to connect/bind socket");
return -ENODEV;
}
setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
/* Make sure to call 'listen' on a bound, connection-oriented sock */
if (flags & OSMO_SOCK_F_BIND) {
switch (type) {
case SOCK_STREAM:
case SOCK_SEQPACKET:
listen(sfd, 10);
break;
}
}
return sfd;
}
int osmo_sock_init_ofd(struct osmo_fd *ofd, int family, int type, int proto,
const char *host, uint16_t port, unsigned int flags)
{
int sfd, rc;
sfd = osmo_sock_init(family, type, proto, host, port, flags);
if (sfd < 0)
return sfd;
ofd->fd = sfd;
ofd->when = BSC_FD_READ;
rc = osmo_fd_register(ofd);
if (rc < 0) {
close(sfd);
return rc;
}
return sfd;
}
int osmo_sock_init_sa(struct sockaddr *ss, uint16_t type,
uint8_t proto, unsigned int flags)
{
char host[NI_MAXHOST];
uint16_t port;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
int s, sa_len;
/* determine port and host from ss */
switch (ss->sa_family) {
case AF_INET:
sin = (struct sockaddr_in *) ss;
sa_len = sizeof(struct sockaddr_in);
port = ntohs(sin->sin_port);
break;
case AF_INET6:
sin6 = (struct sockaddr_in6 *) ss;
sa_len = sizeof(struct sockaddr_in6);
port = ntohs(sin6->sin6_port);
break;
default:
return -EINVAL;
}
s = getnameinfo(ss, sa_len, host, NI_MAXHOST,
NULL, 0, NI_NUMERICHOST);
if (s != 0) {
perror("getnameinfo failed");
return s;
}
return osmo_sock_init(ss->sa_family, type, proto, host, port, flags);
}
static int sockaddr_equal(const struct sockaddr *a,
const struct sockaddr *b, unsigned int len)
{
struct sockaddr_in *sin_a, *sin_b;
struct sockaddr_in6 *sin6_a, *sin6_b;
if (a->sa_family != b->sa_family)
return 0;
switch (a->sa_family) {
case AF_INET:
sin_a = (struct sockaddr_in *)a;
sin_b = (struct sockaddr_in *)b;
if (!memcmp(&sin_a->sin_addr, &sin_b->sin_addr,
sizeof(struct in_addr)))
return 1;
break;
case AF_INET6:
sin6_a = (struct sockaddr_in6 *)a;
sin6_b = (struct sockaddr_in6 *)b;
if (!memcmp(&sin6_a->sin6_addr, &sin6_b->sin6_addr,
sizeof(struct in6_addr)))
return 1;
break;
}
return 0;
}
/* determine if the given address is a local address */
int osmo_sockaddr_is_local(struct sockaddr *addr, socklen_t addrlen)
{
struct ifaddrs *ifaddr, *ifa;
if (getifaddrs(&ifaddr) == -1) {
perror("getifaddrs");
return -EIO;
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (!ifa->ifa_addr)
continue;
if (sockaddr_equal(ifa->ifa_addr, addr, addrlen))
return 1;
}
return 0;
}
#endif /* HAVE_SYS_SOCKET_H */
|
