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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 "auto_break.h"
#include "buffer.h"
#include "case.h"
#include "str.h"
#include "fmt.h"
#include "stralloc.h"
#include "logmsg.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));
}
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