Index: include/dnet.h
===================================================================
--- include/dnet.h	(.../libdnet-stripped)	(revision 12426)
+++ include/dnet.h	(.../-exp/daniel/nmap-sctp/libdnet-stripped)	(revision 12426)
@@ -19,6 +19,7 @@
 #include <dnet/icmp.h>
 #include <dnet/tcp.h>
 #include <dnet/udp.h>
+#include <dnet/sctp.h>
 
 #include <dnet/intf.h>
 #include <dnet/route.h>
Index: include/dnet/sctp.h
===================================================================
--- include/dnet/sctp.h	(.../libdnet-stripped)	(revision 0)
+++ include/dnet/sctp.h	(.../-exp/daniel/nmap-sctp/libdnet-stripped)	(revision 12426)
@@ -0,0 +1,95 @@
+/*
+ * sctp.h
+ *
+ * Stream Control Transmission Protocol (RFC 4960).
+ *
+ * Copyright (c) 2008-2009 Daniel Roethlisberger <daniel@roe.ch>
+ * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
+ *
+ * $Id$
+ */
+
+#ifndef DNET_SCTP_H
+#define DNET_SCTP_H
+
+#define SCTP_HDR_LEN	12
+
+struct sctp_hdr {
+	uint16_t	sh_sport;	/* source port */
+	uint16_t	sh_dport;	/* destination port */
+	uint32_t	sh_vtag;	/* sctp verification tag */
+	uint32_t	sh_sum;		/* sctp checksum */
+};
+
+#define SCTP_PORT_MAX	65535
+
+#define sctp_pack_hdr(hdr, sport, dport, vtag) do {		\
+	struct sctp_hdr *sctp_pack_p = (struct sctp_hdr *)(hdr);	\
+	sctp_pack_p->sh_sport = htons(sport);			\
+	sctp_pack_p->sh_dport = htons(dport);			\
+	sctp_pack_p->sh_vtag = htonl(vtag);			\
+} while (0)
+
+struct sctp_chunkhdr {
+	uint8_t		sch_type;	/* chunk type */
+	uint8_t		sch_flags;	/* chunk flags */
+	uint16_t	sch_length;	/* chunk length */
+};
+
+/* chunk types */
+#define SCTP_DATA		0x00
+#define SCTP_INIT		0x01
+#define SCTP_INIT_ACK		0x02
+#define SCTP_SACK		0x03
+#define SCTP_HEARTBEAT		0x04
+#define SCTP_HEARTBEAT_ACK	0x05
+#define SCTP_ABORT		0x06
+#define SCTP_SHUTDOWN		0x07
+#define SCTP_SHUTDOWN_ACK	0x08
+#define SCTP_ERROR		0x09
+#define SCTP_COOKIE_ECHO	0x0a
+#define SCTP_COOKIE_ACK		0x0b
+#define SCTP_ECNE		0x0c
+#define SCTP_CWR		0x0d
+#define SCTP_SHUTDOWN_COMPLETE	0x0e
+#define SCTP_AUTH		0x0f	/* RFC 4895 */
+#define SCTP_ASCONF_ACK		0x80	/* RFC 5061 */
+#define SCTP_PKTDROP		0x81	/* draft-stewart-sctp-pktdrprep-08 */
+#define SCTP_PAD		0x84	/* RFC 4820 */
+#define SCTP_FORWARD_TSN	0xc0	/* RFC 3758 */
+#define SCTP_ASCONF		0xc1	/* RFC 5061 */
+
+/* chunk types bitmask flags */
+#define SCTP_TYPEFLAG_REPORT	1
+#define SCTP_TYPEFLAG_SKIP	2
+
+#define sctp_pack_chunkhdr(hdr, type, flags, length) do {	\
+	struct sctp_chunkhdr *sctp_pack_chp = (struct sctp_chunkhdr *)(hdr);\
+	sctp_pack_chp->sch_type = type;				\
+	sctp_pack_chp->sch_flags = flags;			\
+	sctp_pack_chp->sch_length = htons(length);		\
+} while (0)
+
+struct sctp_chunkhdr_init {
+	struct sctp_chunkhdr chunkhdr;
+
+	int32_t		schi_itag;	/* Initiate Tag */
+	int32_t		schi_arwnd;	/* Advertised Receiver Window Credit */
+	int16_t		schi_nos;	/* Number of Outbound Streams */
+	int16_t		schi_nis;	/* Number of Inbound Streams */
+	int32_t		schi_itsn;	/* Initial TSN */
+};
+
+#define sctp_pack_chunkhdr_init(hdr, type, flags, length, itag, \
+				arwnd, nos, nis, itsn) do {	\
+	struct sctp_chunkhdr_init *sctp_pack_chip = (struct sctp_chunkhdr_init *)(hdr);\
+	sctp_pack_chunkhdr(sctp_pack_chip, type, flags, length);\
+	sctp_pack_chip->schi_itag = htonl(itag);		\
+	sctp_pack_chip->schi_arwnd = htonl(arwnd);		\
+	sctp_pack_chip->schi_nos = htons(nos);			\
+	sctp_pack_chip->schi_nis = htons(nis);			\
+	sctp_pack_chip->schi_itsn = htonl(itsn);		\
+} while (0)
+
+#endif /* DNET_SCTP_H */
+
Index: include/dnet/Makefile.am
===================================================================
--- include/dnet/Makefile.am	(.../libdnet-stripped)	(revision 12426)
+++ include/dnet/Makefile.am	(.../-exp/daniel/nmap-sctp/libdnet-stripped)	(revision 12426)
@@ -5,4 +5,4 @@
 dnetincludedir = $(includedir)/dnet
 
 dnetinclude_HEADERS = addr.h arp.h blob.h eth.h fw.h icmp.h intf.h ip.h \
-	ip6.h os.h rand.h route.h tcp.h tun.h udp.h
+	ip6.h os.h rand.h route.h tcp.h tun.h udp.h sctp.h
Index: src/ip-util.c
===================================================================
--- src/ip-util.c	(.../libdnet-stripped)	(revision 12426)
+++ src/ip-util.c	(.../-exp/daniel/nmap-sctp/libdnet-stripped)	(revision 12426)
@@ -123,6 +123,13 @@
 			if (!udp->uh_sum)
 				udp->uh_sum = 0xffff;	/* RFC 768 */
 		}
+	} else if (ip->ip_p == IP_PROTO_SCTP) {
+		struct sctp_hdr *sctp = (struct sctp_hdr *)((u_char *)ip + hl);
+
+		if (len >= SCTP_HDR_LEN) {
+			sctp->sh_sum = 0;
+			sctp->sh_sum = htonl(crc32c(sctp, len));
+		}
 	} else if (ip->ip_p == IP_PROTO_ICMP || ip->ip_p == IP_PROTO_IGMP) {
 		struct icmp_hdr *icmp = (struct icmp_hdr *)((u_char *)ip + hl);
 		
Index: libdnet-stripped.vcproj
===================================================================
--- libdnet-stripped.vcproj	(.../libdnet-stripped)	(revision 12426)
+++ libdnet-stripped.vcproj	(.../-exp/daniel/nmap-sctp/libdnet-stripped)	(revision 12426)
@@ -272,6 +272,10 @@
 				RelativePath=".\include\dnet\udp.h"
 				>
 			</File>
+			<File
+				RelativePath=".\include\dnet\sctp.h"
+				>
+			</File>
 		</Filter>
 		<Filter
 			Name="Resource Files"