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
|
/* $OpenBSD: check_tcp.c,v 1.8 2007/01/09 00:45:32 deraadt Exp $ */
/*
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <net/if.h>
#include <limits.h>
#include <event.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include "hoststated.h"
void tcp_write(int, short, void *);
void tcp_host_up(int s, struct ctl_tcp_event *);
void
check_tcp(struct ctl_tcp_event *cte)
{
int s;
int type;
socklen_t len;
struct timeval tv;
struct linger lng;
switch (cte->host->ss.ss_family) {
case AF_INET:
((struct sockaddr_in *)&cte->host->ss)->sin_port =
cte->table->port;
break;
case AF_INET6:
((struct sockaddr_in6 *)&cte->host->ss)->sin6_port =
cte->table->port;
break;
}
len = ((struct sockaddr *)&cte->host->ss)->sa_len;
if ((s = socket(cte->host->ss.ss_family, SOCK_STREAM, 0)) == -1)
goto bad;
bzero(&lng, sizeof(lng));
if (setsockopt(s, SOL_SOCKET, SO_LINGER, &lng, sizeof(lng)) == -1)
goto bad;
type = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &type, sizeof(type)) == -1)
goto bad;
if (fcntl(s, F_SETFL, O_NONBLOCK) == -1)
goto bad;
if (connect(s, (struct sockaddr *)&cte->host->ss, len) == -1) {
if (errno != EINPROGRESS)
goto bad;
} else {
cte->host->up = HOST_UP;
tcp_host_up(s, cte);
return;
}
bcopy(&cte->table->timeout, &tv, sizeof(tv));
event_once(s, EV_TIMEOUT|EV_WRITE, tcp_write, cte, &tv);
return;
bad:
close(s);
cte->host->up = HOST_DOWN;
hce_notify_done(cte->host, "check_tcp: cannot connect");
}
void
tcp_write(int s, short event, void *arg)
{
struct ctl_tcp_event *cte = arg;
int err;
socklen_t len;
if (event == EV_TIMEOUT) {
log_debug("tcp_write: connect timed out");
cte->host->up = HOST_DOWN;
} else {
len = sizeof(err);
if (getsockopt(s, SOL_SOCKET, SO_ERROR, &err, &len))
fatal("tcp_write: getsockopt");
if (err)
cte->host->up = HOST_DOWN;
else
cte->host->up = HOST_UP;
}
if (cte->host->up == HOST_UP)
tcp_host_up(s, cte);
else {
close(s);
hce_notify_done(cte->host, "connect failed");
}
}
void
tcp_host_up(int s, struct ctl_tcp_event *cte)
{
cte->s = s;
switch (cte->table->check) {
case CHECK_TCP:
close(s);
hce_notify_done(cte->host, "tcp_write: success");
break;
case CHECK_HTTP_CODE:
case CHECK_HTTP_DIGEST:
send_http_request(cte);
break;
case CHECK_SEND_EXPECT:
start_send_expect(cte);
break;
default:
fatalx("tcp_write: unhandled check type");
}
}
|
