From dcf815703b327bd6500c0bdea60cb85f67994d5a Mon Sep 17 00:00:00 2001
From: Håkon Nessjøen <haakon.nessjoen@gmail.com>
Date: Sun, 26 Sep 2010 22:13:47 +0200
Subject: Cleanup, and correctly handle connection closing

---
 udp.c | 47 -----------------------------------------------
 1 file changed, 47 deletions(-)

(limited to 'udp.c')

diff --git a/udp.c b/udp.c
index 96fd906..2881f89 100644
--- a/udp.c
+++ b/udp.c
@@ -10,52 +10,6 @@
 #include <linux/if_arp.h>
 #include <stdio.h>
 
-unsigned short udp_sum_calc(unsigned short len_udp, unsigned char src_addr[],unsigned char dest_addr[], unsigned char buff[]) {
-	unsigned short prot_udp=17;
-	unsigned short padd=0;
-	unsigned short word16;
-	unsigned long sum;
-	int i;	
-	
-	// Find out if the length of data is even or odd number. If odd,
-	// add a padding byte = 0 at the end of packet
-	if (len_udp % 2 == 1){
-		padd=1;
-		buff[len_udp]=0;
-	}
-	
-	//initialize sum to zero
-	sum=0;
-	
-	// make 16 bit words out of every two adjacent 8 bit words and 
-	// calculate the sum of all 16 vit words
-	for (i=0;i<len_udp+padd;i=i+2){
-		word16 =((buff[i]<<8)&0xFF00)+(buff[i+1]&0xFF);
-		sum = sum + (unsigned long)word16;
-	}	
-	// add the UDP pseudo header which contains the IP source and destinationn addresses
-	for (i=0;i<4;i=i+2){
-		word16 =((src_addr[i]<<8)&0xFF00)+(src_addr[i+1]&0xFF);
-		sum=sum+word16;	
-	}
-	for (i=0;i<4;i=i+2){
-		word16 =((dest_addr[i]<<8)&0xFF00)+(dest_addr[i+1]&0xFF);
-		sum=sum+word16; 	
-	}
-	// the protocol number and the length of the UDP packet
-	sum = sum + prot_udp + len_udp;
-
-	// keep only the last 16 bits of the 32 bit calculated sum and add the carries
-    	while (sum>>16)
-		sum = (sum & 0xFFFF)+(sum >> 16);
-		
-	// Take the one's complement of sum
-	sum = ~sum;
-
-	return ((unsigned short) sum);
-}
-
-//#define ETH_FRAME_LEN 1518
 unsigned short in_cksum(unsigned short *addr, int len)
 {
 	int nleft = len;
@@ -161,7 +115,6 @@ int sendCustomUDP(const int socket, const char *sourcemac, const char *destmac,
 	udp->dest = htons(20561);
 	udp->check = 0;
 	udp->len = htons(sizeof(struct udphdr) + datalen);
-	//udp->check = udp_sum_calc(datalen+8, (unsigned char *)&(ip->saddr), (unsigned char *)&(ip->daddr), (unsigned char *)udp);
 
 	memcpy(resten, data, datalen);
 
-- 
cgit v1.2.3