diff --git a/slirp/ip_input.c b/slirp/ip_input.c
index 348e1dca5a..ada6f0d059 100644
--- a/slirp/ip_input.c
+++ b/slirp/ip_input.c
@@ -41,6 +41,7 @@
 #include "qemu/osdep.h"
 #include "slirp.h"
 #include "ip_icmp.h"
+#include "qemu/log.h"
 
 static struct ip *ip_reass(Slirp *slirp, struct ip *ip, struct ipq *fp);
 static void ip_freef(Slirp *slirp, struct ipq *fp);
@@ -93,6 +94,8 @@ ip_input(struct mbuf *m)
 
 	ip = mtod(m, struct ip *);
 
+        qemu_log("ip input %x -> %x %x\n", ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), ip->ip_p);
+
 	if (ip->ip_v != IPVERSION) {
 		goto bad;
 	}
diff --git a/slirp/udp.c b/slirp/udp.c
index 227d779022..521c3a5a57 100644
--- a/slirp/udp.c
+++ b/slirp/udp.c
@@ -41,6 +41,7 @@
 #include "qemu/osdep.h"
 #include "slirp.h"
 #include "ip_icmp.h"
+#include "qemu/log.h"
 
 static uint8_t udp_tos(struct socket *so);
 
@@ -95,6 +96,7 @@ udp_input(register struct mbuf *m, int iphlen)
 	ip = mtod(m, struct ip *);
 	uh = (struct udphdr *)((caddr_t)ip + iphlen);
 
+        qemu_log("udp input %u -> %u\n", (unsigned) ntohs(uh->uh_sport), (unsigned) ntohs(uh->uh_dport));
 	/*
 	 * Make mbuf data length reflect UDP length.
 	 * If not enough data to reflect UDP length, drop.