diff --git a/pcap.c b/pcap.c
index 0c6dc89..7dca599 100644
--- a/pcap.c
+++ b/pcap.c
@@ -105,10 +105,12 @@ void pcap(const char *pkt, size_t len)
 }
 
 /**
- * pcapm() - Capture multiple frames from message header to pcap file
- * @mh:		Pointer to sendmsg() message header buffer
+ * pcap_multiple() - Capture multiple frames
+ * @iov:	Array of iovecs, one entry per frame
+ * @n:		Number of frames to capture
+ * @offset:	Offset of the frame within each iovec buffer
  */
-void pcapm(const struct msghdr *mh)
+void pcap_multiple(const struct iovec *iov, unsigned int n, size_t offset)
 {
 	struct timeval tv;
 	unsigned int i;
@@ -118,13 +120,11 @@ void pcapm(const struct msghdr *mh)
 
 	gettimeofday(&tv, NULL);
 
-	for (i = 0; i < mh->msg_iovlen; i++) {
-		const struct iovec *iov = &mh->msg_iov[i];
-
-		if (pcap_frame((char *)iov->iov_base + 4,
-			       iov->iov_len - 4, &tv) != 0) {
+	for (i = 0; i < n; i++) {
+		if (pcap_frame((char *)iov[i].iov_base + offset,
+			       iov[i].iov_len - offset, &tv) != 0) {
 			debug("Cannot log packet, length %lu",
-			      iov->iov_len - 4);
+			      iov->iov_len - offset);
 			return;
 		}
 	}
diff --git a/pcap.h b/pcap.h
index 9e1736c..eafc89b 100644
--- a/pcap.h
+++ b/pcap.h
@@ -7,7 +7,7 @@
 #define PCAP_H
 
 void pcap(const char *pkt, size_t len);
-void pcapm(const struct msghdr *mh);
+void pcap_multiple(const struct iovec *iov, unsigned int n, size_t offset);
 void pcapmm(const struct mmsghdr *mmh, unsigned int vlen);
 void pcap_init(struct ctx *c);
 
diff --git a/tcp.c b/tcp.c
index 4744ac5..95db256 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1472,7 +1472,8 @@ static void tcp_l2_buf_flush(struct ctx *c, struct msghdr *mh,
 		}
 	}
 	*buf_used = *buf_bytes = 0;
-	pcapm(mh);
+
+	pcap_multiple(mh->msg_iov, mh->msg_iovlen, sizeof(uint32_t));
 }
 
 /**