From da1c522cbc6eb93ebce4e321b4f07e9bf411b735 Mon Sep 17 00:00:00 2001
From: jjgarcia <jjgarcia>
Date: Mon, 23 Jul 2001 08:45:37 +0000
Subject: [PATCH] Merge tcp.d and ../crs/socket.c.

---
 src/c/tcp.d | 177 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 175 insertions(+), 2 deletions(-)

diff --git a/src/c/tcp.d b/src/c/tcp.d
index fb105aeb3..826ef47c1 100644
--- a/src/c/tcp.d
+++ b/src/c/tcp.d
@@ -12,8 +12,179 @@
     See file '../Copyright' for full details.
 */
 
+#include <stdio.h>
+#include <sys/types.h>
+#include <errno.h>
+
+#include <netinet/in.h>
+#include <netdb.h> 
+#include <sys/socket.h>
+#include <string.h>
+
+#include <sys/ioctl.h>
+
 #include "ecls.h"
 
+extern int errno;
+
+/***********************************************************************
+ * Client side
+ **********************************************************************/
+
+/* 
+ * Attempts to connect to server, given host and port. Returns file 
+ * descriptor (network socket) or 0 if connection fails.
+ */
+static
+int connect_to_server(char *host, int port)
+{
+  struct sockaddr_in inaddr;	/* INET socket address. */
+  struct sockaddr *addr;	/* address to connect to */
+  struct hostent *host_ptr;
+  int addrlen;			/* length of address */
+  extern char *getenv();
+  extern struct hostent *gethostbyname();
+  int fd;			/* Network socket */
+
+  /* Get the statistics on the specified host. */
+  if ((inaddr.sin_addr.s_addr = inet_addr(host)) == -1) {
+    if ((host_ptr = gethostbyname(host)) == NULL) {
+      /* No such host! */
+      errno = EINVAL;
+      return(0);
+    }
+    /* Check the address type for an internet host. */
+    if (host_ptr->h_addrtype != AF_INET) {
+      /* Not an Internet host! */
+      errno = EPROTOTYPE;
+      return(0);
+    }
+    /* Set up the socket data. */
+    inaddr.sin_family = host_ptr->h_addrtype;
+    memcpy((char *)&inaddr.sin_addr, (char *)host_ptr->h_addr,
+	   sizeof(inaddr.sin_addr));
+  } 
+  else
+    inaddr.sin_family = AF_INET;
+
+  addr = (struct sockaddr *) &inaddr;
+  addrlen = sizeof (struct sockaddr_in);
+  inaddr.sin_port = port;
+  inaddr.sin_port = htons(inaddr.sin_port);
+  /*
+   * Open the network connection.
+   */
+  if ((fd = socket((int) addr->sa_family, SOCK_STREAM, 0)) < 0)
+    return(0);			/* errno set by system call. */
+
+#ifdef TCP_NODELAY
+  /* make sure to turn off TCP coalescence */
+  { int mi;
+    setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &mi, sizeof (int));
+  }
+#endif
+#ifdef THREADS
+  start_critical_section();
+#endif
+  if (connect(fd, addr, addrlen) == -1) {
+    (void) close (fd);
+#ifdef THREADS
+    end_critical_section();
+#endif
+    return(0);		/* errno set by system call. */
+  }
+  /*
+   * Return the id if the connection succeeded.
+   */
+  return(fd);
+}
+
+
+/***********************************************************************
+ * Server side
+ **********************************************************************/
+/*
+ * Creates a server port. Returns file 
+ * descriptor (network socket) or 0 if connection fails.
+ */
+
+int
+create_server_port(int port)
+{
+  struct sockaddr_in inaddr;	/* INET socket address. */
+  struct sockaddr *addr;	/* address to connect to */
+  int addrlen;			/* length of address */
+  int request, conn;		/* Network socket */
+
+  /*
+   * Open the network connection.
+   */
+  if ((request = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+    return(0);			/* errno set by system call. */
+  }
+
+#ifdef SO_REUSEADDR
+    /* Necesary to restart the server without a reboot */
+    {
+	int one = 1;
+	setsockopt(request, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(int));
+    }
+#endif /* SO_REUSEADDR */
+#ifdef TCP_NODELAY
+  /* make sure to turn off TCP coalescence */
+  { int mi;
+    setsockopt(request, IPPROTO_TCP, TCP_NODELAY, &mi, sizeof (int));
+  }
+#endif
+
+  /* Set up the socket data. */
+  memset((char *)&inaddr, 0, sizeof(inaddr));
+  inaddr.sin_family = AF_INET;
+  inaddr.sin_port = htons(port);
+  inaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+  if (bind(request, (struct sockaddr *)&inaddr, sizeof (inaddr)))
+    FEerror("Binding TCP socket", 0);
+  if (listen(request, 1))
+    FEerror("TCP listening", 0);
+#ifdef THREADS
+  /* Don't make this file-descriptor non-blocking
+   * just block on it before we attempt to accept from it
+   * Think _hard_ about moving this out of here, into somewhere sane
+   * and creating an 'accepting' stream type, which is bound to a port
+   * on reading returns streams
+   */
+  {
+    FILE *fp;			/* need to use FILE *'s rather than fd... *sigh* */
+    if ((fp = fdopen(request, "r")) == (FILE *)0)
+      printf("fdopen didn't work on accept fd!\n"); fflush(stdout);
+    fcntl(request, F_SETFL, O_NONBLOCK);
+    clearerr(fp);
+
+  loop:	errno = 0;
+    if ((conn = accept(request, (struct sockaddr *)NULL, (int *)NULL)) < 0)
+    if (errno) {
+      lwpblockon(active, fp, PD_INPUT);
+      clearerr(fp);
+      goto loop;
+    } else {
+      fclose(fp);
+      FEerror("Accepting requests", 0);
+    }
+    fclose(fp);
+  }
+#else
+  if ((conn = accept(request, (struct sockaddr *)NULL, (int *)NULL)) < 0)
+    FEerror("Accepting requests", 0);
+#endif	/* THREADS */
+
+  return(conn);
+}
+
+/***********************************************************************
+ * Interface from file descriptors to streams
+ **********************************************************************/
+
 cl_object
 make_stream(cl_object host, int fd, enum smmode smm)
 {
@@ -45,6 +216,10 @@ make_stream(cl_object host, int fd, enum smmode smm)
 #endif
    return(stream);
 }
+
+/***********************************************************************
+ * Public interface to lisp environment
+ **********************************************************************/
 
 /* 
    @open-client-stream --
@@ -110,5 +285,3 @@ make_stream(cl_object host, int fd, enum smmode smm)
    }
    @(return output)
 @)
-
-