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#include <unistd.h>
#include <sys/types.h>
#include "control.h"
#include "sig.h"
#include "constmap.h"
#include "readwrite.h"
#include "exit.h"
#include "env.h"
#include "qmail.h"
#include "auto_qmail.h"
#include "buffer.h"
#include "str.h"
#include "fmt.h"
#include "stralloc.h"
#include "logmsg.h"
#include "srs2.h"
#define WHO "srsforward"
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 *srsdomaininfo = 0;
stralloc srsdomains = {0};
struct constmap mapsrsdomains;
stralloc srshost = {0};
stralloc srserror = {0};
/** @file srsforward.c
@brief forwarding mails 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 argc,char **argv)
{
int i, j, r;
char *qqx;
srs_t *srs;
stralloc cookie = {0};
char separator = '=';
char srssender[512];
char *host = 0;
char *sender = 0;
char *dtline = 0;
char *sendhost = 0;
int alwaysrewrite = 0;
sig_pipeignore();
sender = env_get("NEWSENDER");
if (!sender)
logmsg(WHO,100,FATAL,"NEWSENDER not set");
host = env_get("HOST");
if (!host)
logmsg(WHO,100,FATAL,"HOST not set");
dtline = env_get("DTLINE");
if (!dtline)
logmsg(WHO,100,FATAL,"DTLINE not set");
if (chdir(auto_qmail) == -1)
logmsg(WHO,111,FATAL,B("unable to chdir to: ",auto_qmail));
if (!stralloc_cats(&srshost,"!")) die_nomem();
if (!stralloc_cats(&srshost,host)) die_nomem();
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 (constmap(&mapsrsdomains,srshost.s,srshost.len)) return 0; // domain blacklisted
if ((srsdomaininfo = constmap(&mapsrsdomains,host,str_len(host))) == 0) {
if ((srsdomaininfo = constmap(&mapsrsdomains,"*",1)) == 0) return 0; // '*' means always SRS
else alwaysrewrite = 1;
}
if (*srsdomaininfo) {
i = str_chr(srsdomaininfo,'|'); // multiple cookies; separated by ' '
if (srsdomaininfo[i] == '|') {
srsdomaininfo[i] = 0;
j = str_chr(srsdomaininfo + i + 1,'|');
if (srsdomaininfo[i + j + 1] == '|') {
srsdomaininfo[i + j + 1] = 0;
sendhost = srsdomaininfo + i + j + 2; // separator: - + =
}
separator = srsdomaininfo[i + 1];
}
if (!stralloc_copys(&cookie,srsdomaininfo)) die_nomem();
if (!stralloc_0(&cookie)) die_nomem();
if (!stralloc_copys(&srshost,"")) die_nomem();
if (*sendhost) {
j = str_len(sendhost);
if (sendhost[j - 1] == '.') {
if (!stralloc_copys(&srshost,sendhost)) die_nomem();
if (!stralloc_cats(&srshost,host)) die_nomem();
} else
if (!stralloc_copys(&srshost,sendhost)) die_nomem();
} else
if (!stralloc_copys(&srshost,host)) die_nomem();
if (!stralloc_0(&srshost)) die_nomem();
} else
die_control();
/* Let's go SRS rewrite */
srs = srs_new();
if (separator == '-' || separator == '+' || separator == '=') { // '=' is default
r = srs_set_separator(srs,separator);
if (r != SRS_SUCCESS) return srserror_str(r);
}
if (alwaysrewrite) {
r = srs_set_alwaysrewrite(srs,alwaysrewrite);
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_forward(srs,srssender,sizeof(srssender),sender,srshost.s)) != SRS_SUCCESS)
logmsg(WHO,100,FATAL,B("Unable to forward: ",sender," ",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,srssender);
while (*++argv) qmail_to(&qqt,*argv);
qqx = qmail_close(&qqt);
if (*qqx) logmsg(WHO,*qqx == 'D' ? 100 : 111,FATAL,qqx + 1);
logmsg(WHO,0,LOG,B(srssender,": qp ",num));
}
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