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
|
/*
* ivykis, an event handling library
* Copyright (C) 2002, 2003 Lennert Buytenhek
* Dedicated to Marija Kulikova.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version
* 2.1 as published by the Free Software Foundation.
*
* This program 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 version 2.1 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License version 2.1 along with this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <iv.h>
#include <netinet/in.h>
#include <string.h>
/* SERVER ********************************************************************/
struct client_connection {
struct iv_fd fd;
struct iv_timer tim;
};
static struct iv_fd server_socket;
static void timeout(void *_c)
{
struct client_connection *c = (struct client_connection *)_c;
struct linger l;
iv_fd_unregister(&c->fd);
/* Force a TCP RST on close. */
l.l_onoff = 1;
l.l_linger = 0;
setsockopt(c->fd.fd, SOL_SOCKET, SO_LINGER, &l, sizeof(l));
close(c->fd.fd);
free(c);
}
static void got_connection(void *_dummy)
{
struct client_connection *c;
struct sockaddr_in addr;
socklen_t addrlen;
int ret;
addrlen = sizeof(addr);
ret = accept(server_socket.fd, (struct sockaddr *)&addr, &addrlen);
if (ret < 0) {
if (errno != EAGAIN) {
perror("accept");
abort();
}
return;
}
c = malloc(sizeof(*c));
if (c == NULL) {
close(ret);
return;
}
IV_FD_INIT(&c->fd);
c->fd.fd = ret;
c->fd.cookie = (void *)c;
iv_fd_register(&c->fd);
IV_TIMER_INIT(&c->tim);
c->tim.cookie = (void *)c;
c->tim.handler = timeout;
iv_validate_now();
c->tim.expires = iv_now;
c->tim.expires.tv_sec += 1;
iv_timer_register(&c->tim);
}
static void server_init(void)
{
struct sockaddr_in addr;
int sock;
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
perror("socket");
abort();
}
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(6667);
if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
abort();
}
listen(sock, 5);
IV_FD_INIT(&server_socket);
server_socket.fd = sock;
server_socket.handler_in = got_connection;
iv_fd_register(&server_socket);
}
/* CLIENT ********************************************************************/
static struct iv_fd ifd;
static void got_reset(void *_dummy)
{
printf("reset caught\n");
iv_fd_set_handler_err(&ifd, NULL);
}
static void connect_done(void *_dummy)
{
socklen_t len;
int ret;
len = sizeof(ret);
if (getsockopt(ifd.fd, SOL_SOCKET, SO_ERROR, &ret, &len) < 0) {
fprintf(stderr, "connect_done: error %d while "
"getsockopt(SO_ERROR)\n", errno);
abort();
}
if (ret == EINPROGRESS)
return;
iv_fd_set_handler_out(&ifd, NULL);
if (ret) {
fprintf(stderr, "connect: %s\n", strerror(ret));
iv_quit();
} else {
iv_fd_set_handler_err(&ifd, got_reset);
}
}
int main()
{
int fd;
struct sockaddr_in addr;
int ret;
iv_init();
server_init();
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd < 0) {
perror("socket");
exit(1);
}
IV_FD_INIT(&ifd);
ifd.fd = fd;
ifd.cookie = NULL;
ifd.handler_out = connect_done;
iv_fd_register(&ifd);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(0x7f000001);
addr.sin_port = htons(6667);
ret = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
if (ret == 0 || errno != EINPROGRESS)
connect_done(NULL);
iv_main();
iv_deinit();
return 0;
}
|
