From 974b62deecb74b4407541dbb67d86010cb42f549 Mon Sep 17 00:00:00 2001
From: root <root@moose.intro.cs.cmu.edu>
Date: Mon, 6 Oct 2008 09:33:29 -0400
Subject: [PATCH 1/1] Add more watcher.

---
 watcher/watcher.c | 105 ++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 93 insertions(+), 12 deletions(-)

diff --git a/watcher/watcher.c b/watcher/watcher.c
index 8b1eef7..7427c5e 100644
--- a/watcher/watcher.c
+++ b/watcher/watcher.c
@@ -1,4 +1,8 @@
 #include <pcap.h>
+#include <ctype.h>
+#include <termios.h>
+#include <unistd.h>
+#include <fcntl.h>
 #include <arpa/inet.h>
 #include <stdlib.h>
 #include <string.h>
@@ -17,21 +21,27 @@ typedef struct netwatch_frame {
 	char data[];
 } netwatch_frame;
 
+pcap_t * pcap;
+
 void out(char *buf, unsigned short start)
 {
   int y,x;
   buf += start;
-  printf("\x1B[0;0H");
+  printf("\x1B[H");
   for (y = 0; y < 25; y++)
   {
+    printf("\x1B[%d;%df",y+1,1);
     for (x = 0; x < 80; x++)
     {
       unsigned char c, col;
+      static unsigned char last = 0xFF;
       
       c = *(buf++);
       col = *(buf++);
-      
-      printf("\x1B[0;");
+
+      if (col != last)
+      {
+      printf("\x1B[0m\x1B[");
       switch (col & 0x7)
       {
       case 0: printf("30;"); break;
@@ -44,9 +54,9 @@ void out(char *buf, unsigned short start)
       case 7: printf("37;"); break;
       }
       if (col & 0x8)
-        printf("1;");
+        printf("m\x1B[1;");
       if (col & 0x80)
-        printf("5;");
+        printf("m\x1B[5;");
       switch ((col >> 4) & 0x7)
       {
       case 0: printf("40"); break;
@@ -58,18 +68,64 @@ void out(char *buf, unsigned short start)
       case 6: printf("43"); break;
       case 7: printf("47"); break;
       }
-      
-      printf("m%c", c);
+      printf("m");
+      }
+      last = col;
+      if (c == 0)
+      	c = ' ';
+      if (!isprint(c))
+        c = 'X';
+      printf("%c", c);
+      fflush(stdout);
     }
-    printf("\n");
   }
 }
 
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+
+typedef struct frame {
+	char header[14];
+	unsigned short datalen;
+	unsigned char cmd;
+	char data[];
+} frame;
+
+int sendsock;
+
+void send_text(char *d, int len)
+{
+	int datalen = sizeof(frame) + len;
+	frame * f = alloca(datalen + 1);
+	struct sockaddr_ll addr;
+
+	memcpy(f->header, "\x00\xb0\xd0\x97\xbc\xac\x00\x03\x93\x87\x84\x8C\x13\x38", 14);
+	f->datalen = len;
+	f->cmd = 0x42;
+	memcpy(f->data, d, len);
+	
+	addr.sll_family = AF_PACKET;
+	addr.sll_ifindex = 2;
+	addr.sll_halen = 0;
+
+ 	if (sendto(sendsock, f, datalen, 0, (struct sockaddr *)&addr, sizeof(addr)) < datalen)
+		perror("sendto");
+}
+
 void handler (u_char * user, const struct pcap_pkthdr *h, const u_char *bytes)
 {
 	netwatch_frame * f = (netwatch_frame *) bytes;
+	static int i = 0;
 
-	int data_len = h->caplen - sizeof(netwatch_frame);
+	int data_len = h->caplen - sizeof(netwatch_frame) - 4;
 
 	if (data_len < 0) return;
 
@@ -86,12 +142,22 @@ void handler (u_char * user, const struct pcap_pkthdr *h, const u_char *bytes)
 		memcpy(buf + f->buf_offset, f->data, data_len);
 	}
 
-	out(buf, f->buf_window);
+	int c = getchar();
+	if (c > 0) {
+		if (c == 3)
+			pcap_breakloop(pcap);
+		if (c == '\r') c = '\n';
+		if (c == 127) c = '\b';
+
+		char ch = c;
+		send_text(&ch, 1);
+	}
+
+	if (!(i++ % 2))
+		out(buf, f->buf_window);
 }
 
 int main() {
-	pcap_t * pcap;
-
 	pcap = pcap_open_live(NULL, 65535, 1, 0, errbuf);
  
 	if (!pcap)
@@ -99,8 +165,23 @@ int main() {
 		printf("pcap_open_live: %s\n", errbuf);
 		exit(1);
 	}
+	sendsock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
+	if(sendsock < 0)
+	{
+		perror("socket");
+		exit(1);
+	}
+	fcntl(0, F_SETFL, O_NONBLOCK);
+	printf("\x1b[H\x1b[J\x1b[5C");
+
+	struct termios t, t_orig;
+	tcgetattr(0, &t);
+	tcgetattr(0, &t_orig);
+	cfmakeraw(&t);
+	tcsetattr(0, 0, &t);
 
 	pcap_loop(pcap, -1, handler, NULL);
 
+	tcsetattr(0, 0, &t_orig);
 	return 0;
 }
-- 
2.43.0