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
|
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "stralloc.h"
#include "logmsg.h"
#include "ip.h"
#include "case.h"
#include "str.h"
#include "exit.h"
#include "scan.h"
#include "timeout.h"
#include "timeoutconn.h"
#include "socket_if.h"
#define WHO "qmail-postgrey"
#define CT 10 /* Connect timeout */
#define WT 10 /* Write timeout */
#define RT 10 /* Read timeout */
unsigned int port = 60000; /* default port */
int main(int argc, char **argv)
{
struct ip4_address ip4;
struct ip6_address ip6;
stralloc query = {0};
char buf[64];
char *remoteip = 0;
char *netif = 0;
uint32 ifidx = 0;
int pgfd;
int i, j, r;
if (argc != 6)
logmsg(WHO,100,USAGE,"qmail-postgrey ip%ifidx;port sender recipient client_address client_name");
remoteip = argv[1];
i = str_chr(remoteip,':');
if (remoteip[i] == ':') {
j = str_chr(remoteip,'%'); /* IF index */
if (remoteip[j] == '%') {
remoteip[j] = 0;
netif = &remoteip[j + 1];
ifidx = socket_getifidx(netif);
}
if (!ip6_scan(remoteip,(char *)&ip6.d))
logmsg(WHO,111,FATAL,B("No valid IPv6 address provided: ",remoteip));
pgfd = socket(AF_INET6,SOCK_STREAM,0);
if (pgfd == -1)
logmsg(WHO,111,FATAL,"Can't bind to IPv6 socket.");
r = timeoutconn6(pgfd,(char *)&ip6.d,port,CT,ifidx);
} else {
if (!ip4_scan(remoteip,(char *)&ip4.d))
logmsg(WHO,111,FATAL,B("No valid IPv6 address provided: ",remoteip));
pgfd = socket(AF_INET,SOCK_STREAM,0);
if (pgfd == -1)
logmsg(WHO,111,FATAL,"Can't bind to IPv4 socket.");
r = timeoutconn4(pgfd,(char *)&ip4.d,port,CT);
}
if (r != 0) {
if (errno == ETIMEDOUT)
close(pgfd);
logmsg(WHO,111,FATAL,B("Can't communicate with postgrey server: ",remoteip));
_exit(1);
}
/* Provide SMTP connect vector to postgrey server */
if (!stralloc_copys(&query,"request=smtpd_access_policy\nclient_address=")) _exit(1);
if (!stralloc_cats(&query,argv[4])) _exit(1);
if (!stralloc_cats(&query,"\nclient_name=")) _exit(1);
if (!stralloc_cats(&query,argv[5])) _exit(1);
if (!stralloc_cats(&query,"\nsender=")) _exit(1);
if (!stralloc_cats(&query,argv[2])) _exit(1);
if (!stralloc_cats(&query,"\nrecipient=")) _exit(1);
if (!stralloc_cats(&query,argv[3])) _exit(1);
if (!stralloc_cats(&query,"\n\n")) _exit(1);
do {
r = timeoutwrite(WT,pgfd,query.s,query.len);
} while (r == -1 && errno == EINTR);
if (r != query.len) { close(pgfd); _exit(1); }
/* Read response */
do {
r = timeoutread(RT,pgfd,buf,sizeof(buf));
} while (r == -1 && errno == EINTR);
if (r == -1) { close(pgfd); _exit(1); }
close(pgfd);
// logmsg(WHO,0,INFO,buf);
if (r >= 12)
if (!case_diffb(buf,12,"action=dunno")) _exit(0);
if (r >= 14)
if (!case_diffb(buf,14,"action=prepend")) _exit(0);
if (r >= 22)
if (!case_diffb(buf,22,"action=defer_if_permit")) _exit(10);
exit(1);
}
|
