1 files changed, 110 insertions, 0 deletions
diff --git a/pgm4/inet_streams.d/inet_rstream.c b/pgm4/inet_streams.d/inet_rstream.c
new file mode 100644
index 0000000..3dafee6
--- /dev/null
+++ b/pgm4/inet_streams.d/inet_rstream.c
@@ -0,0 +1,110 @@
+/************************************************************************\
+* 			  INET_RSTREAM.C       			         *
+* Test of TCP/IP. Set up a socket for establishing a connection at       *
+* some free port on the local host. After accepting a connection, speak  *
+* briefly to peer, and then read char at a time from the stream. Write   *
+* to stdout. At EOF, shut down.                                          *
+* 								         *
+* Phil Kearns							         *
+* April 11, 1987		 				         *
+* 								         *
+* Modified February 2009 to use getaddrinfo()                            *
+\************************************************************************/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+void printsin(struct sockaddr_in*, char*, char*);
+
+int main()
+{
+  int listener;  /* fd for socket on which we get connection requests */
+  int conn;      /* fd for socket thru which we pass data */
+  struct sockaddr_in *localaddr, peer;
+  int ecode;
+  socklen_t length;
+  char ch;
+  struct addrinfo hints, *addrlist;
+
+
+/*
+   Want to specify local server address of:
+      addressing family: AF_INET
+      ip address:        any interface on this system
+      port:              0 => system will pick free port
+*/
+
+  memset(&hints, 0, sizeof(hints));
+  hints.ai_family = AF_INET; hints.ai_socktype = SOCK_STREAM;
+  hints.ai_flags = AI_NUMERICSERV | AI_PASSIVE; hints.ai_protocol = 0;
+  hints.ai_canonname = NULL; hints.ai_addr = NULL;
+  hints.ai_next = NULL;
+
+  ecode = getaddrinfo(NULL, "0", &hints, &addrlist);
+  if (ecode != 0) {
+    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(ecode));
+    exit(1);
+  }
+
+  localaddr = (struct sockaddr_in *) addrlist->ai_addr;
+
+/*
+   Create socket on which we will accept connections. This is NOT the
+   same as the socket on which we pass data.
+*/
+  if ( (listener = socket( addrlist->ai_family, addrlist->ai_socktype, 0 )) < 0 ) {
+    perror("inet_rstream:socket");
+    exit(1);
+  }
+
+
+  if (bind(listener, (struct sockaddr *)localaddr, sizeof(struct sockaddr_in)) < 0) {
+    perror("inet_rstream:bind");
+    exit(1);
+  }
+
+/*
+   Print out the port number assigned to this process by bind().
+*/
+  length = sizeof(struct sockaddr_in);
+  if (getsockname(listener, (struct sockaddr *)localaddr, &length) < 0) {
+    perror("inet_rstream:getsockname");
+    exit(1);
+  }
+  printf("RSTREAM:: assigned port number %d\n", ntohs(localaddr->sin_port));
+
+/*
+   Now accept a single connection. Upon connection, data will be
+   passed through the socket on descriptor conn.
+*/
+  listen(listener,1);
+  length = sizeof(peer);
+  if ((conn=accept(listener, (struct sockaddr *)&peer, &length)) < 0) {
+    perror("inet_rstream:accept");
+    exit(1);
+  }
+  printsin(&peer,"RSTREAM::", "accepted connection from");
+
+  printf("\n\nRSTREAM:: data from stream:\n");
+  while ( read(conn, &ch, 1) == 1)
+    putchar(ch);
+  putchar('\n');
+  exit(0);
+}
+
+void printsin(struct sockaddr_in *sin, char *m1, char *m2 )
+{
+  char fromip[INET_ADDRSTRLEN];
+
+  printf ("%s %s:\n", m1, m2);
+  printf ("  family %d, addr %s, port %d\n", sin -> sin_family,
+	    inet_ntop(AF_INET, &(sin->sin_addr.s_addr), fromip, sizeof(fromip)),
+            ntohs((unsigned short)(sin -> sin_port)));
+}