From 732b02c54457bfaccaac77c9431fb8aee13233f0 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 12 Jul 2016 13:24:59 +0300
Subject: [PATCH] Change some headers and structs for BSD compatibility

---
 main.c | 61 +++++++++++++++++++++++++++++-----------------------------
 1 file changed, 31 insertions(+), 30 deletions(-)

diff --git a/main.c b/main.c
index 1b12385..38624d0 100644
--- a/main.c
+++ b/main.c
@@ -6,22 +6,23 @@ Distributed under the GPL
 
 #include <stdint.h>
 #include <stdio.h>
-#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 #include <errno.h>
 #include <syslog.h>
 #include <sys/poll.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <net/ethernet.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
 #include <netinet/ip_icmp.h>
+#include <netinet/ip6.h>
 #include <netdb.h>
-#include <sys/wait.h>
-#include <stdlib.h>
 #include <arpa/inet.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <string.h>
 #include <pcap/pcap.h>
-#include <netinet/ether.h>
-#include <netinet/ip6.h>
 
 typedef unsigned long long Time;
 
@@ -275,30 +276,30 @@ void monitor_check(Monitor *monitor, Time timestamp)
 void capture_handler(uint8_t *user, const struct pcap_pkthdr *header, const uint8_t *data)
 {
 	Monitor *monitor = (Monitor *)user;
-	const struct ethhdr *eth = (const struct ethhdr *)(data);
+	const struct ether_header *eth = (const struct ether_header *)(data);
 
 	int src_scope = 0;
 	int dst_scope = 0;
-	int proto = ntohs(eth->h_proto);
-	if(proto==ETH_P_IP)
+	int proto = ntohs(eth->ether_type);
+	if(proto==ETHERTYPE_IP)
 	{
-		const struct iphdr *ip = (const struct iphdr *)(eth+1);
-		if(ntohl(ip->daddr)>>28==14)
+		const struct ip *ip = (const struct ip *)(eth+1);
+		if(ntohl(ip->ip_dst.s_addr)>>28==14)
 			dst_scope = 3;
 
 		for(unsigned i=0; i<monitor->n_addresses; ++i)
 			if(monitor->addresses[i].address.ss_family==AF_INET)
 			{
-				int s = get_inet_scope(ip->saddr, &monitor->addresses[i]);
+				int s = get_inet_scope(ip->ip_src.s_addr, &monitor->addresses[i]);
 				if(s>src_scope)
 					src_scope = s;
 
-				s = get_inet_scope(ip->daddr, &monitor->addresses[i]);
+				s = get_inet_scope(ip->ip_dst.s_addr, &monitor->addresses[i]);
 				if(s>dst_scope)
 					dst_scope = s;
 			}
 	}
-	else if(proto==ETH_P_IPV6)
+	else if(proto==ETHERTYPE_IPV6)
 	{
 		const struct ip6_hdr *ip6 = (const struct ip6_hdr *)(eth+1);
 		for(unsigned i=0; i<monitor->n_addresses; ++i)
@@ -415,11 +416,11 @@ void pinger_check(Pinger *pinger, Time time)
 			fprintf(stderr, "recvfrom error: %s\n", strerror(errno));
 		else
 		{
-			struct iphdr *ip = (struct iphdr *)data;
-			if(ip->protocol==IPPROTO_ICMP)
+			struct ip *ip = (struct ip *)data;
+			if(ip->ip_p==IPPROTO_ICMP)
 			{
-				struct icmphdr *icmp = (struct icmphdr *)(ip+1);
-				if(icmp->type==ICMP_ECHOREPLY && icmp->un.echo.id==pinger->id)
+				struct icmp *icmp = (struct icmp *)(ip+1);
+				if(icmp->icmp_type==ICMP_ECHOREPLY && icmp->icmp_id==pinger->id)
 				{
 					/* It's an ICMP echo reply and ours, process it */
 					if(verbose)
@@ -429,10 +430,10 @@ void pinger_check(Pinger *pinger, Time time)
 						printf("Ping reply from %s\n", buf);
 					}
 
-					if(icmp->un.echo.sequence==pinger->pending)
+					if(icmp->icmp_seq==pinger->pending)
 						pinger->pending = 0;
 					else if(verbose)
-						printf("Sequence %d, expected %d\n", icmp->un.echo.sequence, pinger->pending);
+						printf("Sequence %d, expected %d\n", icmp->icmp_seq, pinger->pending);
 				}
 			}
 		}
@@ -469,13 +470,13 @@ void send_ping(Pinger *pinger)
 	for(unsigned i=0; i<sizeof(data); ++i)
 		data[i] = i;
 
-	struct icmphdr *hdr = (struct icmphdr *)data;
-	hdr->type = ICMP_ECHO;
-	hdr->code = 0;
-	hdr->checksum = 0;
-	hdr->un.echo.id = pinger->id;
-	hdr->un.echo.sequence = pinger->seq;
-	hdr->checksum = checksum(data, sizeof(data));
+	struct icmp *hdr = (struct icmp *)data;
+	hdr->icmp_type = ICMP_ECHO;
+	hdr->icmp_code = 0;
+	hdr->icmp_cksum = 0;
+	hdr->icmp_id = pinger->id;
+	hdr->icmp_seq = pinger->seq;
+	hdr->icmp_cksum = checksum(data, sizeof(data));
 
 	if(sendto(pinger->socket, data, sizeof(data), 0, (struct sockaddr *)&pinger->target_addr, sizeof(struct sockaddr_in))==-1)
 		fprintf(stderr, "sendto error: %s\n", strerror(errno));
-- 
2.43.0