287     struct ip *pip,  in ProxyEncodeTcpStream()  argument
296 	tc = (struct tcphdr *)ip_next(pip);  in ProxyEncodeTcpStream()
321 	if ((int)(ntohs(pip->ip_len) + strlen(buffer)) > maxpacketsize)  in ProxyEncodeTcpStream()
330 		hlen = (pip->ip_hl + tc->th_off) << 2;  in ProxyEncodeTcpStream()
331 		dlen = ntohs(pip->ip_len) - hlen;  in ProxyEncodeTcpStream()
338 		p = (char *)pip;  in ProxyEncodeTcpStream()
350 		tc = (struct tcphdr *)ip_next(pip);			  in ProxyEncodeTcpStream()
352 		AddSeq(lnk, delta + slen, pip->ip_hl, pip->ip_len, tc->th_seq,  in ProxyEncodeTcpStream()
360 		accumulate = pip->ip_len;  in ProxyEncodeTcpStream()
361 		pip->ip_len = htons(ntohs(pip->ip_len) + slen);  in ProxyEncodeTcpStream()
362 		accumulate -= pip->ip_len;  in ProxyEncodeTcpStream()
364 		ADJUST_CHECKSUM(accumulate, pip->ip_sum);  in ProxyEncodeTcpStream()
374 	tc->th_sum = TcpChecksum(pip);  in ProxyEncodeTcpStream()
379 ProxyEncodeIpHeader(struct ip *pip,  in ProxyEncodeIpHeader()  argument
388 	fprintf(stdout, " ip cksum 1 = %x\n", (u_int) IpChecksum(pip));  in ProxyEncodeIpHeader()
389 	fprintf(stdout, "tcp cksum 1 = %x\n", (u_int) TcpChecksum(pip));  in ProxyEncodeIpHeader()
395 	if (pip->ip_hl > (0x0f - OPTION_LEN_INT32))  in ProxyEncodeIpHeader()
403 		ptr = (u_char *) pip;  in ProxyEncodeIpHeader()
405 		memcpy(ptr + OPTION_LEN_BYTES, ptr, ntohs(pip->ip_len) - 20);  in ProxyEncodeIpHeader()
410 		memcpy(&option[2], (u_char *) & pip->ip_dst, 4);  in ProxyEncodeIpHeader()
412 		tc = (struct tcphdr *)ip_next(pip);  in ProxyEncodeIpHeader()
429 		sptr = (u_short *) pip;  in ProxyEncodeIpHeader()
431 		pip->ip_hl += OPTION_LEN_INT32;  in ProxyEncodeIpHeader()
434 		accumulate += pip->ip_len;  in ProxyEncodeIpHeader()
435 		pip->ip_len = htons(ntohs(pip->ip_len) + OPTION_LEN_BYTES);  in ProxyEncodeIpHeader()
436 		accumulate -= pip->ip_len;  in ProxyEncodeIpHeader()
438 		ADJUST_CHECKSUM(accumulate, pip->ip_sum);  in ProxyEncodeIpHeader()
444 	fprintf(stdout, " ip cksum 2 = %x\n", (u_int) IpChecksum(pip));  in ProxyEncodeIpHeader()
445 	fprintf(stdout, "tcp cksum 2 = %x\n", (u_int) TcpChecksum(pip));  in ProxyEncodeIpHeader()
497     struct ip *pip,  in ProxyModify()  argument
507 		ProxyEncodeIpHeader(pip, maxpacketsize);  in ProxyModify()
511 		ProxyEncodeTcpStream(lnk, pip, maxpacketsize);  in ProxyModify()