From 89b7b67a13ebb7965cc7f13ad0595e2194a2d34c Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Wed, 3 Jul 2024 15:48:04 +0200
Subject: add sqmail-4.2.29a

---
 src/qmail-postgrey.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 src/qmail-postgrey.c

(limited to 'src/qmail-postgrey.c')

diff --git a/src/qmail-postgrey.c b/src/qmail-postgrey.c
new file mode 100644
index 0000000..bd88389
--- /dev/null
+++ b/src/qmail-postgrey.c
@@ -0,0 +1,105 @@
+#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);
+}
-- 
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