static void make_packet()

in util/netconsblaster.c [175:201]

• 23 lines of code
• 2 McCabe index (conditional complexity)

static void make_packet(struct netcons_packet *pkt, const struct in6_addr *src,
		const struct in6_addr *dst, const struct netcons_metadata *md)
{
	const int len = NETCONSLEN;
	unsigned int nr;

	memset(pkt, 0, sizeof(pkt->l3) + sizeof(pkt->l4));

	memcpy(&pkt->l3.ip6_src, src, sizeof(*src));
	memcpy(&pkt->l3.ip6_dst, dst, sizeof(*dst));
	pkt->l3.ip6_vfc |= (6 << 4);
	pkt->l3.ip6_nxt = IPPROTO_UDP;
	pkt->l3.ip6_plen = htons(sizeof(pkt->l4) + len);
	pkt->l3.ip6_hlim = 64;

	nr = snprintf(pkt->payload, len - 1, "%d,%lu,%lu,%s;", md->lvl, md->seq,
			md->ts, contflag(md->cont));
	if (nr < len)
		snprintf(pkt->payload + nr, len - nr, "%s", filler);
	pkt->payload[len - 1] = '\n';

	pkt->l4.source = htons(6666);
	pkt->l4.dest = htons(1514);
	pkt->l4.len = htons(sizeof(pkt->l4) + len);
	pkt->l4.check = htons(udp_csum(&pkt->l3.ip6_src, &pkt->l4,
			sizeof(pkt->l4) + len));
}