Differential D30335 Diff 89519 tests/sys/netinet/libalias/util.c

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				#include <atf-c.h>
				#include <stdio.h>
				#include <stdlib.h>

				#include <netinet/in.h>

				#include "util.h"

				void
				hexdump(void *p, size_t len) {
				size_t i;
				unsigned char *c = p;

				for (i = 0; i < len; i++) {
				printf(" %02x", c[i]);
				switch (i & 0xf) {
				case 0xf: printf("\n"); break;
				case 0x8: printf(" "); break;
				default: break;
				}
				}
				if ((i & 0xf) != 0x0)
				printf("\n");
				}

				struct ip *
				ip_packet(struct in_addr src, struct in_addr dst, u_char protocol, size_t len) {
				struct ip * p;

				ATF_REQUIRE(len >= 64 && len <= IP_MAXPACKET);

				p = calloc(1, len);
				ATF_REQUIRE(p != NULL);

				p->ip_v = IPVERSION;
				p->ip_hl = sizeof(*p)/4;
				p->ip_len = htons(len);
				p->ip_ttl = IPDEFTTL;
				p->ip_src = src;
				p->ip_dst = dst;
				p->ip_p = protocol;
				ATF_REQUIRE(p->ip_hl == 5);

				return (p);
				}

				struct udphdr *
				set_udp(struct ip *p, u_short sport, u_short dport) {
				struct udphdr u = (void )((uint32_t )(void )p + p->ip_hl);
				int payload = ntohs(p->ip_len) - 4*p->ip_hl;

				ATF_REQUIRE(payload >= (int)sizeof(*u));
				p->ip_p = IPPROTO_UDP;
				u->uh_sport = htons(sport);
				u->uh_dport = htons(dport);
				u->uh_ulen = htons(payload);
				return (u);
				}