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
|
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
static void set_addr(struct sockaddr_storage *ss, char *ip, char *port, int *len)
{
if (ss->ss_family == AF_INET) {
struct sockaddr_in *a = (struct sockaddr_in *)ss;
a->sin_addr.s_addr = inet_addr(ip);
a->sin_port = htons(atoi(port));
*len = sizeof(*a);
} else {
struct sockaddr_in6 *a = (struct sockaddr_in6 *)ss;
a->sin6_family = AF_INET6;
inet_pton(AF_INET6, ip, &a->sin6_addr);
a->sin6_port = htons(atoi(port));
*len = sizeof(*a);
}
}
static int do_client(int argc, char *argv[])
{
struct sockaddr_storage ss;
char buf[] = "hello";
int csk, ret, len;
if (argc < 5) {
printf("%s client -4|6 IP PORT [IP PORT]\n", argv[0]);
return -1;
}
bzero((void *)&ss, sizeof(ss));
ss.ss_family = !strcmp(argv[2], "-4") ? AF_INET : AF_INET6;
csk = socket(ss.ss_family, SOCK_STREAM, IPPROTO_SCTP);
if (csk < 0) {
printf("failed to create socket\n");
return -1;
}
if (argc >= 7) {
set_addr(&ss, argv[5], argv[6], &len);
ret = bind(csk, (struct sockaddr *)&ss, len);
if (ret < 0) {
printf("failed to bind to address\n");
return -1;
}
}
set_addr(&ss, argv[3], argv[4], &len);
ret = connect(csk, (struct sockaddr *)&ss, len);
if (ret < 0) {
printf("failed to connect to peer\n");
return -1;
}
ret = send(csk, buf, strlen(buf) + 1, 0);
if (ret < 0) {
printf("failed to send msg %d\n", ret);
return -1;
}
close(csk);
return 0;
}
int main(int argc, char *argv[])
{
struct sockaddr_storage ss;
int lsk, csk, ret, len;
char buf[20];
if (argc < 2 || (strcmp(argv[1], "server") && strcmp(argv[1], "client"))) {
printf("%s server|client ...\n", argv[0]);
return -1;
}
if (!strcmp(argv[1], "client"))
return do_client(argc, argv);
if (argc < 5) {
printf("%s server -4|6 IP PORT [IFACE]\n", argv[0]);
return -1;
}
ss.ss_family = !strcmp(argv[2], "-4") ? AF_INET : AF_INET6;
lsk = socket(ss.ss_family, SOCK_STREAM, IPPROTO_SCTP);
if (lsk < 0) {
printf("failed to create lsk\n");
return -1;
}
if (argc >= 6) {
ret = setsockopt(lsk, SOL_SOCKET, SO_BINDTODEVICE,
argv[5], strlen(argv[5]) + 1);
if (ret < 0) {
printf("failed to bind to device\n");
return -1;
}
}
set_addr(&ss, argv[3], argv[4], &len);
ret = bind(lsk, (struct sockaddr *)&ss, len);
if (ret < 0) {
printf("failed to bind to address\n");
return -1;
}
ret = listen(lsk, 5);
if (ret < 0) {
printf("failed to listen on port\n");
return -1;
}
csk = accept(lsk, (struct sockaddr *)NULL, (socklen_t *)NULL);
if (csk < 0) {
printf("failed to accept new client\n");
return -1;
}
ret = recv(csk, buf, sizeof(buf), 0);
if (ret <= 0) {
printf("failed to recv msg %d\n", ret);
return -1;
}
close(csk);
close(lsk);
return 0;
}
|
