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
|
#include <sys/types.h>
#include <unistd.h>
#include "buffer.h"
#include "case.h"
#include "constmap.h"
#include "env.h"
#include "exit.h"
#include "fmt.h"
#include "logmsg.h"
#include "readwrite.h"
#include "sig.h"
#include "str.h"
#include "stralloc.h"
#include "auto_break.h"
#include "auto_qmail.h"
#include "control.h"
#include "qmail.h"
#include "srs2.h"
#define WHO "srsreverse"
void die_nomem()
{
logmsg(WHO, 111, FATAL, "out of memory");
}
void die_control()
{
logmsg(WHO, 110, FATAL, "Unable to read control files");
}
struct qmail qqt;
char *vdomainuser = 0;
stralloc vdomains = {0};
struct constmap mapvdomains;
char *srsdomaininfo = 0;
stralloc srsdomains = {0};
struct constmap mapsrsdomains;
stralloc srserror = {0};
stralloc srshost = {0};
/** @file srsreverse.c
@brief forwarding bounces with SRS enhanced addresss
@return 0 on success (forwarded or not)
-3 SRS error with error output
111 no memory / processing error
110 control file not readable
*/
static int srserror_str(int code)
{
if (!stralloc_copys(&srserror, "SRS: ")) die_nomem();
if (!stralloc_cats(&srserror, srs_strerror(code))) die_nomem();
if (!stralloc_0(&srserror)) die_nomem();
return -3;
}
ssize_t mywrite(int fd, char *buf, int len)
{
qmail_put(&qqt, buf, len);
return len;
}
char inbuf[BUFFER_INSIZE];
char outbuf[1];
buffer bi = BUFFER_INIT(read, 0, inbuf, sizeof(inbuf));
buffer bo = BUFFER_INIT(mywrite, -1, outbuf, sizeof(outbuf));
char num[FMT_ULONG];
int main()
{
int i, j, r;
char *recipient;
char *dtline;
char *qqx;
srs_t *srs;
stralloc cookie = {0};
char separator = '=';
char srsrecipient[512];
char *host = 0;
sig_pipeignore();
recipient = env_get("RECIPIENT");
if (!recipient) logmsg(WHO, 100, FATAL, "RECIPIENT not set");
dtline = env_get("DTLINE");
if (!dtline) logmsg(WHO, 100, FATAL, "DTLINE not set");
host = env_get("HOST");
if (!host) logmsg(WHO, 100, FATAL, "HOST not set");
if (chdir(auto_qmail) == -1) logmsg(WHO, 111, FATAL, B("unable to chdir to: ", auto_qmail));
/* Check for particular virtual SRS domain user */
switch (control_readfile(&vdomains, "control/virtualdomains", 0)) {
case -1: die_control();
case 0:
if (!constmap_init(&mapvdomains, "", 0, 1)) die_nomem();
break;
case 1:
if (!constmap_init(&mapvdomains, vdomains.s, vdomains.len, 1)) die_nomem();
break;
}
j = str_len(host);
for (i = 0; i <= j; ++i)
if ((i == 0) || (host[i] == '.')) {
if (!stralloc_copys(&srshost, "")) die_nomem();
if (!stralloc_catb(&srshost, host + i, j - i)) die_nomem();
if ((srsdomaininfo = constmap(&mapvdomains, srshost.s, srshost.len)) != 0) goto SRSDOMAINS;
}
if (!stralloc_copys(&srshost, host)) die_nomem();
SRSDOMAINS:
switch (control_readfile(&srsdomains, "control/srsdomains", 0)) {
case -1: die_control();
case 0:
if (!constmap_init(&mapsrsdomains, "", 0, 1)) die_nomem();
break;
case 1:
if (!constmap_init(&mapsrsdomains, srsdomains.s, srsdomains.len, 1)) die_nomem();
break;
}
if ((srsdomaininfo = constmap(&mapsrsdomains, srshost.s, srshost.len)) == 0)
if ((srsdomaininfo = constmap(&mapsrsdomains, "*", 1)) == 0) return 0;
if (*srsdomaininfo) {
i = str_chr(srsdomaininfo, '|'); // multiple cookies; separated by ' '
if (srsdomaininfo[i] == '|') {
srsdomaininfo[i] = 0;
separator = srsdomaininfo[i + 1];
}
if (!stralloc_copys(&cookie, srsdomaininfo)) die_nomem();
if (!stralloc_0(&cookie)) die_nomem();
}
/* strip virtual user from recipient */
if ((vdomainuser = constmap(&mapvdomains, host, j))) {
i = str_chr(recipient, *auto_break);
if (!case_diffb(recipient, i - 1, vdomainuser)) recipient += i + 1;
}
/* Let's go SRS reverse */
srs = srs_new();
if (separator == '-' || separator == '+' || separator == '=') { // '=' is default
r = srs_set_separator(srs, separator);
if (r != SRS_SUCCESS) return srserror_str(r);
}
for (j = 0, i = 0; j < cookie.len; j++) {
if (cookie.s[j] == ' ' || cookie.s[j] == '\0') {
cookie.s[j] = '\0';
r = srs_add_secret(srs, cookie.s + i);
if (r != SRS_SUCCESS) return srserror_str(r);
i = j + 1;
if (cookie.s[i] == ' ') {
j++;
continue;
}
}
}
if ((r = srs_reverse(srs, srsrecipient, sizeof(srsrecipient), recipient)) != SRS_SUCCESS) {
logmsg(WHO, 100, FATAL, B("unable to reverse: ", recipient, " ", srs_strerror(r)));
}
if (qmail_open(&qqt) == -1) logmsg(WHO, 111, FATAL, "unable to fork: ");
qmail_puts(&qqt, dtline);
if (buffer_copy(&bo, &bi) != 0) logmsg(WHO, 111, FATAL, "unable to read message: ");
buffer_flush(&bo);
num[fmt_ulong(num, qmail_qp(&qqt))] = 0;
qmail_from(&qqt, "");
qmail_to(&qqt, srsrecipient);
qqx = qmail_close(&qqt);
if (*qqx) logmsg(WHO, *qqx == 'D' ? 100 : 111, FATAL, qqx + 1);
logmsg(WHO, 0, LOG, B(srsrecipient, ": qp ", num));
}
|
