diff -cr stunnel-4.15/src/protocol.c stunnel-4.15-pgsql-patch/src/protocol.c
*** stunnel-4.15/src/protocol.c	Wed Mar  1 15:43:58 2006
--- stunnel-4.15-pgsql-patch/src/protocol.c	Fri Jun 23 22:56:18 2006
***************
*** 45,50 ****
--- 45,51 ----
  static void pop3_server(CLI *);
  static void nntp_client(CLI *);
  static void connect_client(CLI *);
+ static void pgsql_client(CLI *);
  
  void negotiate(CLI *c) {
      if(!c->opt->protocol)
***************
*** 64,69 ****
--- 65,72 ----
              nntp_client(c);
          else if(!strcmp(c->opt->protocol, "connect"))
              connect_client(c);
+         else if(!strcmp(c->opt->protocol, "pgsql"))
+             pgsql_client(c);
          else {
              s_log(LOG_ERR, "Protocol %s not supported in client mode",
                  c->opt->protocol);
***************
*** 271,274 ****
--- 274,290 ----
      } while(line[0]);
  }
  
+ static void pgsql_client(CLI *c) {
+     u8 buffer[1];
+     u8 request[8] = {0x00, 0x00, 0x00, 0x08, 0x04, 0xd2, 0x16, 0x2f};
+ 
+     write_blocking(c, c->remote_fd.fd, request, 8);
+     read_blocking(c, c->remote_fd.fd, buffer, 1);
+ 
+     if(buffer[0] != 'S') {
+         s_log(LOG_ERR, "Server does not support SSL");
+         longjmp(c->err, 1);
+     }
+ }
+ 
  /* End of protocol.c */