--- netselect.c	2010-10-26 23:08:55.000000000 +0000
+++ netselect.c	2024-11-24 00:06:55.339564162 +0000
@@ -39,8 +39,10 @@
  * hey, great!  Let me know. -- apenwarr
  */
 
-#ifdef __EMX__
-# include <io.h>
+#if defined(__EMX__) || 1	/* XXX BSD */
+# ifdef __EMX__
+#  include <io.h>
+# endif
 # include <fcntl.h>
 # include <sys/types.h>
 # include <sys/select.h>
@@ -167,6 +169,7 @@
     extern int optind;
     int hostcount, startcount, endcount = 0, sent_one, lag, min_lag = 100;
     int ch, seq, ttl, max_ttl = 30, num_score = 1;
+    int on = 1;
     int use_icmp = 0;
     unsigned int min_tries = 10;
     struct timeval now;
@@ -280,7 +283,10 @@
     if (verbose >= 1)
 	fprintf(stderr, "Running netselect to choose %d out of %d address%s.\n",
 		num_score, numhosts, numhosts==1 ? "" : "es");
-    
+    if (setsockopt(sndsock, IPPROTO_IP, IP_HDRINCL, &on, sizeof(on)) < 0) {
+    	perror("IP_HDRINCL");
+    	exit(1);
+    }
     /* keep going until most of the hosts have been finished */
     must_continue = numhosts;
     while (must_continue && must_continue >= numhosts/2)
@@ -774,7 +780,7 @@
     ip->ip_off = 0;
     ip->ip_hl = sizeof(*ip) >> 2;
     ip->ip_p = IPPROTO_UDP;
-    ip->ip_len = 0; /* kernel fills this in */
+    ip->ip_len = sizeof(OPacket);
     ip->ip_ttl = ttl;
     ip->ip_v = IPVERSION;
     ip->ip_id = htons(ident + seq);