send_v6.c

unix网络编程卷1：套接口API的全书源码

#include	"ping.h"

void
send_v6()
{
#ifdef	IPV6
	int					len;
	struct icmp6_hdr	*icmp6;

	icmp6 = (struct icmp6_hdr *) sendbuf;
	icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
	icmp6->icmp6_code = 0;
	icmp6->icmp6_id = pid;
	icmp6->icmp6_seq = nsent++;
	memset((icmp6 + 1), 0xa5, datalen);	/* fill with pattern */
	Gettimeofday((struct timeval *) (icmp6 + 1), NULL);

	len = 8 + datalen;		/* 8-byte ICMPv6 header */

	Sendto(sockfd, sendbuf, len, 0, pr->sasend, pr->salen);
		/* 4kernel calculates and stores checksum for us */
#endif	/* IPV6 */
}