From: Sergio Gelato <Sergio.Gelato@astro.su.se>
To: Andy Repton <pm-outgoingip@boomerangdomains.com>,
Russell Nelson <nelson@crynwr.com>
Subject: Bug in Andy Repton's outgoingip patch for qmail
Date: Fri, 4 Jul 2003 14:20:43 +0200
I have found a bug in Andy Repton's outgoingip patch for qmail 1.03
(http://www.qmail.org/outgoingip.patch).
The problem is the call to stralloc_copy(&outgoingip, "0.0.0.0");
the correct function to use is stralloc_copys().
An updated version of the patch follows. Besides fixing this bug,
I also added some documentation to the man pages and to qmail-showctl.c.
Best wishes,
Sergio Gelato
Index: qmail-control.9
===================================================================
RCS file: /home/software/CVSREPOS/qmail/qmail-control.9,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -u -r1.2 -r1.3
--- qmail-control.9 2001/08/14 17:35:30 1.2
+++ qmail-control.9 2003/07/04 09:02:58 1.3
@@ -57,6 +57,7 @@
.I locals \fIme \fRqmail-send
.I mfcheck \fR0 \fRqmail-smtpd
.I morercpthosts \fR(none) \fRqmail-smtpd
+.I outgoingip \fR0.0.0.0 \fRqmail-remote
.I percenthack \fR(none) \fRqmail-send
.I plusdomain \fIme \fRqmail-inject
.I qmqpservers \fR(none) \fRqmail-qmqpc
Index: qmail-remote.8
===================================================================
RCS file: /home/software/CVSREPOS/qmail/qmail-remote.8,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -u -u -r1.1.1.1 -r1.2
--- qmail-remote.8 2001/05/30 16:55:45 1.1.1.1
+++ qmail-remote.8 2003/07/04 09:02:58 1.2
@@ -124,6 +124,13 @@
.B qmail-remote
refuses to run.
.TP 5
+.I outgoingip
+IP address to be used on outgoing connections.
+Default: system-defined.
+The value
+.IR 0.0.0.0
+is equivalent to the system default.
+.TP 5
.I smtproutes
Artificial SMTP routes.
Each route has the form
Index: qmail-remote.c
===================================================================
RCS file: /home/software/CVSREPOS/qmail/qmail-remote.c,v
retrieving revision 1.1.1.1
retrieving revision 1.3
diff -u -u -r1.1.1.1 -r1.3
--- qmail-remote.c 2001/05/30 16:55:46 1.1.1.1
+++ qmail-remote.c 2003/07/04 11:38:57 1.3
@@ -39,6 +39,7 @@
static stralloc sauninit = {0};
stralloc helohost = {0};
+stralloc outgoingip = {0};
stralloc routes = {0};
struct constmap maproutes;
stralloc host = {0};
@@ -47,6 +48,7 @@
saa reciplist = {0};
struct ip_address partner;
+struct ip_address outip;
void out(s) char *s; { if (substdio_puts(subfdoutsmall,s) == -1) _exit(0); }
void zero() { if (substdio_put(subfdoutsmall,"\0",1) == -1) _exit(0); }
@@ -56,6 +58,7 @@
ch = sa->s[i]; if (ch < 33) ch = '?'; if (ch > 126) ch = '?';
if (substdio_put(subfdoutsmall,&ch,1) == -1) _exit(0); } }
+void temp_noip() { out("Zinvalid ipaddr in control/outgoingip (#4.3.0)\n"); zerodie(); }
void temp_nomem() { out("ZOut of memory. (#4.3.0)\n"); zerodie(); }
void temp_oserr() { out("Z\
System resources temporarily unavailable. (#4.3.0)\n"); zerodie(); }
@@ -310,6 +313,7 @@
void getcontrols()
{
+ int r;
if (control_init() == -1) temp_control();
if (control_readint(&timeout,"control/timeoutremote") == -1) temp_control();
if (control_readint(&timeoutconnect,"control/timeoutconnect") == -1)
@@ -324,6 +328,12 @@
case 1:
if (!constmap_init(&maproutes,routes.s,routes.len,1)) temp_nomem(); break;
}
+ r = control_readline(&outgoingip,"control/outgoingip");
+ if (-1 == r) { if (errno == error_nomem) temp_nomem(); temp_control(); }
+ if (0 == r && !stralloc_copys(&outgoingip, "0.0.0.0")) temp_nomem();
+ if (str_equal(outgoingip.s, "0.0.0.0"))
+ { outip.d[0]=outip.d[1]=outip.d[2]=outip.d[3]=(unsigned long) 0; }
+ else if (!ip_scan(outgoingip.s, &outip)) temp_noip();
}
void main(argc,argv)
@@ -414,7 +424,7 @@
smtpfd = socket(AF_INET,SOCK_STREAM,0);
if (smtpfd == -1) temp_oserr();
- if (timeoutconn(smtpfd,&ip.ix[i].ip,(unsigned int) port,timeoutconnect) == 0) {
+ if (timeoutconn(smtpfd,&ip.ix[i].ip,&outip,(unsigned int) port,timeoutconnect) == 0) {
tcpto_err(&ip.ix[i].ip,0);
partner = ip.ix[i].ip;
smtp(); /* does not return */
Index: qmail-showctl.c
===================================================================
RCS file: /home/software/CVSREPOS/qmail/qmail-showctl.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -u -u -r1.1.1.1 -r1.2
--- qmail-showctl.c 2001/05/30 16:55:46 1.1.1.1
+++ qmail-showctl.c 2003/07/04 11:45:48 1.2
@@ -230,6 +230,7 @@
do_str("localiphost",1,"localiphost","Local IP address becomes ");
do_lst("locals","Messages for me are delivered locally.","Messages for "," are delivered locally.");
do_str("me",0,"undefined! Uh-oh","My name is ");
+ do_str("outgoingip",0,"0.0.0.0","Outgoing IP address is ");
do_lst("percenthack","The percent hack is not allowed.","The percent hack is allowed for user%host@",".");
do_str("plusdomain",1,"plusdomain","Plus domain name is ");
do_lst("qmqpservers","No QMQP servers.","QMQP server: ",".");
Index: remoteinfo.c
===================================================================
RCS file: /home/software/CVSREPOS/qmail/remoteinfo.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -u -u -r1.1.1.1 -r1.2
--- remoteinfo.c 2001/05/30 16:55:47 1.1.1.1
+++ remoteinfo.c 2003/07/03 22:28:50 1.2
@@ -44,12 +44,12 @@
s = socket(AF_INET,SOCK_STREAM,0);
if (s == -1) return 0;
- byte_zero(&sin,sizeof(sin));
+/* byte_zero(&sin,sizeof(sin));
sin.sin_family = AF_INET;
byte_copy(&sin.sin_addr,4,ipl);
sin.sin_port = 0;
- if (bind(s,(struct sockaddr *) &sin,sizeof(sin)) == -1) { close(s); return 0; }
- if (timeoutconn(s,ipr,113,timeout) == -1) { close(s); return 0; }
+ if (bind(s,(struct sockaddr *) &sin,sizeof(sin)) == -1) { close(s); return 0; } */
+ if (timeoutconn(s,ipr,ipl,113,timeout) == -1) { close(s); return 0; }
fcntl(s,F_SETFL,fcntl(s,F_GETFL,0) & ~O_NDELAY);
len = 0;
Index: timeoutconn.c
===================================================================
RCS file: /home/software/CVSREPOS/qmail/timeoutconn.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -u -u -r1.1.1.1 -r1.2
--- timeoutconn.c 2001/05/30 16:55:47 1.1.1.1
+++ timeoutconn.c 2003/07/03 22:28:50 1.2
@@ -10,9 +10,10 @@
#include "byte.h"
#include "timeoutconn.h"
-int timeoutconn(s,ip,port,timeout)
+int timeoutconn(s,ip,outip,port,timeout)
int s;
struct ip_address *ip;
+struct ip_address *outip;
unsigned int port;
int timeout;
{
@@ -22,6 +23,13 @@
fd_set wfds;
struct timeval tv;
+ /* bind() an outgoing ipaddr */
+ byte_zero(&sin,sizeof(sin));
+ byte_copy(&sin.sin_addr.s_addr,4,outip);
+ sin.sin_family = AF_INET;
+
+ if (-1 == bind(s,(struct sockaddr *) &sin,sizeof(sin))) return -1;
+
byte_zero(&sin,sizeof(sin));
byte_copy(&sin.sin_addr,4,ip);
x = (char *) &sin.sin_port;