From 7b3897ab98e2a562aacaacb80e3ac2a227ca0161 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Tue, 1 Mar 2011 15:02:09 +0800
Subject: [PATCH] Added telnet client

---
 Usermode/Applications/telnet_src/Makefile |  10 ++
 Usermode/Applications/telnet_src/main.c   | 123 ++++++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100644 Usermode/Applications/telnet_src/Makefile
 create mode 100644 Usermode/Applications/telnet_src/main.c

diff --git a/Usermode/Applications/telnet_src/Makefile b/Usermode/Applications/telnet_src/Makefile
new file mode 100644
index 00000000..ff415eec
--- /dev/null
+++ b/Usermode/Applications/telnet_src/Makefile
@@ -0,0 +1,10 @@
+# Project: telnet
+
+-include ../Makefile.cfg
+
+LDFLAGS += -lnet
+
+OBJ = main.o
+BIN = telnet
+
+-include ../Makefile.tpl
diff --git a/Usermode/Applications/telnet_src/main.c b/Usermode/Applications/telnet_src/main.c
new file mode 100644
index 00000000..6c4f892e
--- /dev/null
+++ b/Usermode/Applications/telnet_src/main.c
@@ -0,0 +1,123 @@
+/*
+ AcessOS Test Network Application
+*/
+#include <acess/sys.h>
+#include <stdio.h>
+#include <net.h>
+
+#define BUFSIZ	128
+
+// === PROTOTYPES ===
+ int	main(int argc, char *argv[], char *envp[]);
+ int	OpenTCP(const char *AddressString, short PortNumber);
+
+// ==== CODE ====
+int main(int argc, char *argv[], char *envp[])
+{
+	 int	server_fd, rv;
+	 int	client_running = 1;
+	
+	// Connect to the remove server
+	server_fd = OpenTCP( argv[1], atoi(argv[2]) );
+	if( server_fd == -1 ) {
+		fprintf(stderr, "Unable to create socket\n");
+		return -1;
+	}
+	
+	while( client_running )
+	{
+		fd_set	fds;
+		char	buffer[BUFSIZ];
+		 int	len;
+		
+		FD_ZERO(&fds);
+		FD_SET(0, &fds);
+		FD_SET(server_fd, &fds);
+		
+		rv = select(server_fd+1, &fds, NULL, NULL, NULL);
+		if( rv < 0 )	break;
+		
+		if( FD_ISSET(server_fd, &fds) )
+		{
+			// Read from server, and write to stdout
+			do
+			{
+				len = read(server_fd, BUFSIZ, buffer);
+				write(1, len, buffer);
+			} while( len == BUFSIZ );
+		}
+		
+		if( FD_ISSET(0, &fds) )
+		{
+			// Read from stdin, and write to server
+			do
+			{
+				len = read(0, BUFSIZ, buffer);
+				write(server_fd, len, buffer);
+				write(1, len, buffer);
+			} while( len == BUFSIZ );
+		}
+	}
+	
+	close(server_fd);
+	return 0;
+}
+
+/**
+ * \brief Initialise a TCP connection to \a AddressString on port \a PortNumber
+ */
+int OpenTCP(const char *AddressString, short PortNumber)
+{
+	 int	fd, addrType;
+	char	*iface;
+	char	addrBuffer[8];
+	
+	// Parse IP Address
+	addrType = Net_ParseAddress(AddressString, addrBuffer);
+	if( addrType == 0 ) {
+		fprintf(stderr, "Unable to parse '%s' as an IP address\n", AddressString);
+		return -1;
+	}
+	
+	// Finds the interface for the destination address
+	iface = Net_GetInterface(addrType, addrBuffer);
+	if( iface == NULL ) {
+		fprintf(stderr, "Unable to find a route to '%s'\n", AddressString);
+		return -1;
+	}
+	
+	printf("iface = '%s'\n", iface);
+	
+	// Open client socket
+	// TODO: Move this out to libnet?
+	{
+		 int	len = snprintf(NULL, 100, "/Devices/ip/%s/tcpc", iface);
+		char	path[len+1];
+		snprintf(path, 100, "/Devices/ip/%s/tcpc", iface);
+		fd = open(path, OPENFLAG_READ|OPENFLAG_WRITE);
+	}
+	
+	free(iface);
+	
+	if( fd == -1 ) {
+		fprintf(stderr, "Unable to open TCP Client for reading\n");
+		return -1;
+	}
+	
+	// Set remote port and address
+	printf("Setting port and remote address\n");
+	ioctl(fd, 5, &PortNumber);
+	ioctl(fd, 6, addrBuffer);
+	
+	// Connect
+	printf("Initiating connection\n");
+	if( ioctl(fd, 7, NULL) == 0 ) {
+		// Shouldn't happen :(
+		fprintf(stderr, "Unable to start connection\n");
+		return -1;
+	}
+	
+	// Return descriptor
+	return fd;
+}
+
-- 
2.20.1