Imported from ../bash-2.04.tar.gz.

lib/sh/netopen.c

@@ -0,0 +1,228 @@
+/*   
+ * netopen.c -- functions to make tcp/udp connections
+ *
+ * Chet Ramey
+ * chet@ins.CWRU.Edu
+ */
+
+/* Copyright (C) 1987,1991 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   Bash is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bash; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+#include <config.h>
+
+#if defined (HAVE_NETWORK)
+
+#include <stdio.h> 
+#include <sys/types.h>
+
+#if defined (HAVE_SYS_SOCKET_H)
+#  include <sys/socket.h>
+#endif
+
+#if defined (HAVE_NETINET_IN_H)
+#  include <netinet/in.h>
+#endif
+
+#if defined (HAVE_NETDB_H)
+#  include <netdb.h>
+#endif
+
+#if defined (HAVE_ARPA_INET_H)
+#  include <arpa/inet.h>
+#endif
+
+#include <bashansi.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifndef errno
+extern int errno;
+#endif
+
+#if !defined (HAVE_INET_ATON)
+extern int inet_aton ();
+#endif
+
+extern char *xmalloc ();
+
+/* Stuff the internet address corresponding to HOST into AP, in network
+   byte order.  Return 1 on success, 0 on failure. */
+
+static int
+_getaddr (host, ap)
+     char *host;
+     struct in_addr *ap;
+{
+  struct hostent *h;
+  int r;
+
+  r = 0;
+  if (isdigit (host[0]))
+    {
+      /* If the first character is a digit, guess that it's an
+	 Internet address and return immediately if inet_aton succeeds. */
+      r = inet_aton (host, ap);
+      if (r)
+	return r;
+    }
+#if !defined (HAVE_GETHOSTBYNAME)
+  return 0;
+#else
+  h = gethostbyname (host);
+  if (h && h->h_addr)
+    {
+      bcopy(h->h_addr, (char *)ap, h->h_length);
+      return 1;
+    }
+#endif
+  return 0;
+  
+}
+
+/* Return 1 if SERV is a valid port number and stuff the converted value into
+   PP in network byte order. */   
+static int
+_getserv (serv, pp)
+     char *serv;
+     unsigned short *pp;
+{
+  long l;
+  unsigned short s;
+
+  if (legal_number (serv, &l))
+    {
+      if (l > 65535)
+	return 0;
+      s = (unsigned short)(l & 0xFFFF);
+      s = htons (s);
+      if (pp)
+	*pp = s;
+      return 1;
+    }
+  else
+    return 0;
+}
+
+static int 
+_netopen(host, serv, typ)
+     char *host, *serv;
+     int typ;
+{
+  struct in_addr ina;
+  struct sockaddr_in sin;
+  unsigned short p;
+  int s;
+  char **cp;
+
+  if (_getaddr(host, &ina) == 0)
+    {
+      internal_error ("%s: host unknown", host);
+      return -1;
+    }
+
+  if (_getserv(serv, &p) == 0)
+    {
+      internal_error("%s: invalid service", serv);
+      return -1;
+    }
+	
+  bzero ((char *)&sin, sizeof(sin));
+  sin.sin_family = AF_INET;
+  sin.sin_port = p;
+  sin.sin_addr = ina;
+
+  s = socket(AF_INET, (typ == 't') ? SOCK_STREAM : SOCK_DGRAM, 0);
+  if (s < 0)
+    {
+      sys_error ("socket");
+      return (-1);
+    }
+
+  if (connect (s, (struct sockaddr *)&sin, sizeof (sin)) < 0)
+    {
+      sys_error("connect");
+      close(s);
+      return (-1);
+    }
+
+  return(s);
+}
+
+/*
+ * Open a TCP or UDP connection given a path like `/dev/tcp/host/port' to
+ * host `host' on port `port' and return the connected socket.
+ */
+int
+netopen (path)
+     char *path;
+{
+  char *np, *s, *t;
+  int fd;
+
+  np = xmalloc (strlen (path) + 1);
+  strcpy (np, path);
+
+  s = np + 9;
+  t = strchr (s, '/');
+  if (t == 0)
+    {
+      internal_error ("%s: bad network path specification", path);
+      return -1;
+    }
+  *t++ = '\0';
+  fd = _netopen (s, t, path[5]);
+  free (np);
+
+  return fd;
+}
+
+#if 0
+/*
+ * Open a TCP connection to host `host' on the port defined for service
+ * `serv' and return the connected socket.
+ */
+int
+tcpopen (host, serv)
+     char *host, *serv;
+{
+  return (_netopen (host, serv, 't'));
+}
+
+/*
+ * Open a UDP connection to host `host' on the port defined for service
+ * `serv' and return the connected socket.
+ */
+int
+udpopen (host, serv)
+     char *host, *serv;
+{
+  return _netopen (host, serv, 'u');
+}
+#endif
+
+#else /* !HAVE_NETWORK */
+
+int
+netopen (path)
+     char *path;
+{
+  internal_error ("network operations not supported");
+  return -1;
+}
+
+#endif /* !HAVE_NETWORK */