<HEAD><TITLE>discuss@charon: [292] in "Coldmud discussion meeting"</TITLE>
<H1>[292] in Coldmud discussion meeting</H1></HEAD>
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<HR><H2>ip-&gt;host, host-&gt;ip</H2>
<H3>daemon@ATHENA.MIT.EDU (Sat May 21 02:21:05 1994
)</H3>
<PRE>
From: merlin@kernighan.cba.csuohio.edu (Randy Beiter)
To: coldstuff@MIT.EDU
Date: Sat, 21 May 1994 01:44:19 -0400 (EDT)

as per the mumblings i made in the meeting about port numbers, i've found a
way to have cold convert to/from ip/hostnames, the hostname to ip might come
in handy for things that use connect(). patch file follows for anyone at
all interested. forgive me if their coded badly, first coldmud internal
hacking i've done =)

*note, this also includes patches for the problem with bind() and a small
 dictionary error. simply delete those lines if you don't want them
 fixed too.*

---

diff -c srcp2/adminop.c src/adminop.c
*** srcp2/adminop.c	Tue Apr 12 21:37:29 1994
--- src/adminop.c	Sat May 21 00:55:48 1994
***************
*** 552,555 ****
--- 554,587 ----
      if (!func_init_0())
          return;
      push_int(cur_frame-&gt;ticks);
+ }
+ 
+ void op_hostname(void)
+ {
+     Data *args;
+     String *r;
+ 
+     /* Accept a port number. */
+     if (!func_init_1(&amp;args, STRING))
+         return;
+ 
+     r = hostname(data_sptr(&amp;args[0]));
+ 
+     pop(1);
+     push_string(r);   
+ }
+ 
+ void op_ip(void)
+ {
+     Data *args;
+     String *r;
+ 
+     /* Accept a hostname. */
+     if (!func_init_1(&amp;args, STRING))
+         return;
+ 
+     r = ip(data_sptr(&amp;args[0]));
+ 
+     pop(1);
+     push_string(r);
  }
diff -c srcp2/dict.c src/dict.c
*** srcp2/dict.c	Mon Jan  3 22:36:30 1994
--- src/dict.c	Thu May 12 20:35:08 1994
***************
*** 180,186 ****
  
      /* Copy the links beyond i backward. */
      MEMMOVE(dict-&gt;links + i, dict-&gt;links + i + 1, dict-&gt;keys-&gt;len - i);
!     dict-&gt;links[dict-&gt;keys-&gt;len - 1] = -1;
  
      /* Since we've renumbered all the elements beyond i, we have to check
       * all the links and hash table entries.  If they're greater than i,
--- 180,186 ----
  
      /* Copy the links beyond i backward. */
      MEMMOVE(dict-&gt;links + i, dict-&gt;links + i + 1, dict-&gt;keys-&gt;len - i);
!     dict-&gt;links[dict-&gt;keys-&gt;len] = -1;
  
      /* Since we've renumbered all the elements beyond i, we have to check
       * all the links and hash table entries.  If they're greater than i,
diff -c srcp2/grammar.y src/grammar.y
*** srcp2/grammar.y	Tue Apr 12 21:37:30 1994
--- src/grammar.y	Sat May 21 01:15:28 1994
***************
*** 105,111 ****
  %token CHILDREN ANCESTORS HAS_ANCESTOR SIZE
  %token CREATE CHPARENTS DESTROY LOG CONN_ASSIGN BINARY_DUMP TEXT_DUMP
  %token RUN_SCRIPT SHUTDOWN BIND UNBIND CONNECT SET_HEARTBEAT_FREQ DATA SET_NAME
! %token DEL_NAME DB_TOP TICKS_REMAINING
  
  /* Reserved for future use. */
  %token FORK ATOMIC NON_ATOMIC
--- 105,111 ----
  %token CHILDREN ANCESTORS HAS_ANCESTOR SIZE
  %token CREATE CHPARENTS DESTROY LOG CONN_ASSIGN BINARY_DUMP TEXT_DUMP
  %token RUN_SCRIPT SHUTDOWN BIND UNBIND CONNECT SET_HEARTBEAT_FREQ DATA SET_NAME
! %token DEL_NAME DB_TOP TICKS_REMAINING HOSTNAME IP
  
  /* Reserved for future use. */
  %token FORK ATOMIC NON_ATOMIC
diff -c srcp2/net.c src/net.c
*** srcp2/net.c	Mon Jan  3 22:36:22 1994
--- src/net.c	Sat May 21 00:54:55 1994
***************
*** 52,57 ****
--- 52,58 ----
      setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &amp;one, sizeof(int));
  
      /* Bind the socket to port. */
+     memset(&amp;sin, 0, sizeof(sin));
      sin.sin_family = AF_INET;
      sin.sin_port = htons((unsigned short) port);
      if (bind(fd, (struct sockaddr *) &amp;sin, sizeof(sin)) &lt; 0) {
***************
*** 244,248 ****
--- 245,281 ----
        default:
  	return other_id;
      }
+ }
+ 
+ String *hostname(char *chaddr)
+ {
+    unsigned addr;
+    register struct hostent *hp;
+ 
+    addr = inet_addr(chaddr);
+    if (addr == -1)
+      return string_from_chars(chaddr, strlen(chaddr));
+ 
+    hp = gethostbyaddr((char *) &amp;addr, 4, AF_INET);
+    if (hp)
+      return string_from_chars(hp-&gt;h_name, strlen(hp-&gt;h_name));
+    else
+      return string_from_chars(chaddr, strlen(chaddr));
+ }
+ 
+ String *ip(char *chaddr)
+ {
+    unsigned addr;
+    register struct hostent *hp;
+ 
+    addr = inet_addr(chaddr);
+    if (addr == -1) {
+      hp = gethostbyname(chaddr);
+      if (hp)
+        return string_from_chars(inet_ntoa(*(struct in_addr *)hp-&gt;h_addr), strlen(inet_ntoa(*(struct in_addr *)hp-&gt;h_addr)));
+      else
+        return string_from_chars("-1", 2);
+    } else
+        return string_from_chars(chaddr, strlen(chaddr));
  }
  
diff -c srcp2/net.h src/net.h
*** srcp2/net.h	Mon Jan  3 22:36:29 1994
--- src/net.h	Sat May 21 00:56:14 1994
***************
*** 8,13 ****
--- 8,15 ----
  int io_event_wait(long sec, Connection *connections, Server *servers,
  		  Pending *pendings);
  long non_blocking_connect(char *addr, int port, int *socket_return);
+ String *hostname(char *addr);
+ String *ip(char *addr);
  
  extern long server_failure_reason;
  
diff -c srcp2/opcodes.c src/opcodes.c
*** srcp2/opcodes.c	Tue Apr 12 21:37:32 1994
--- src/opcodes.c	Sat May 21 00:56:41 1994
***************
*** 208,215 ****
      { SET_NAME,		"set_name",	op_set_name,	0,	0 },
      { DEL_NAME,		"del_name",	op_del_name,	0,	0 },
      { DB_TOP,		"db_top",	op_db_top,	0,	0 },
!     { TICKS_REMAINING,	"ticks_remaining", op_ticks_remaining, 0, 0 }
! 
  };
  
  void init_op_table(void)
--- 208,216 ----
      { SET_NAME,		"set_name",	op_set_name,	0,	0 },
      { DEL_NAME,		"del_name",	op_del_name,	0,	0 },
      { DB_TOP,		"db_top",	op_db_top,	0,	0 },
!     { TICKS_REMAINING,	"ticks_remaining", op_ticks_remaining, 0, 0 },
!     { HOSTNAME,		"hostname", 	op_hostname,	0,	0 },
!     { IP,		"ip",		op_ip,		0,	0 }
  };
  
  void init_op_table(void)
diff -c srcp2/operator.h src/operator.h
*** srcp2/operator.h	Tue Apr 12 21:37:32 1994
--- src/operator.h	Sat May 21 00:57:00 1994
***************
*** 196,201 ****
--- 196,203 ----
  void op_del_name(void);
  void op_db_top(void);
  void op_ticks_remaining(void);
+ void op_hostname(void);
+ void op_ip(void);
  
  #endif
  
</PRE>
