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Release 4.14 net/netfilter/nf_nat_proto_sctp.c

Directory: net/netfilter
 * Copyright (c) 2008 Patrick McHardy <>
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.

#include <linux/types.h>
#include <linux/sctp.h>
#include <net/sctp/checksum.h>

#include <net/netfilter/nf_nat_l4proto.h>

static u_int16_t nf_sctp_port_rover;

static void sctp_unique_tuple(const struct nf_nat_l3proto *l3proto, struct nf_conntrack_tuple *tuple, const struct nf_nat_range *range, enum nf_nat_manip_type maniptype, const struct nf_conn *ct) { nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct, &nf_sctp_port_rover); }


Patrick McHardy4795.92%266.67%
Changli Gao24.08%133.33%

static bool sctp_manip_pkt(struct sk_buff *skb, const struct nf_nat_l3proto *l3proto, unsigned int iphdroff, unsigned int hdroff, const struct nf_conntrack_tuple *tuple, enum nf_nat_manip_type maniptype) { struct sctphdr *hdr; int hdrsize = 8; /* This could be an inner header returned in imcp packet; in such * cases we cannot update the checksum field since it is outside * of the 8 bytes of transport layer headers we are guaranteed. */ if (skb->len >= hdroff + sizeof(*hdr)) hdrsize = sizeof(*hdr); if (!skb_make_writable(skb, hdroff + hdrsize)) return false; hdr = (struct sctphdr *)(skb->data + hdroff); if (maniptype == NF_NAT_MANIP_SRC) { /* Get rid of src port */ hdr->source = tuple->src.u.sctp.port; } else { /* Get rid of dst port */ hdr->dest = tuple->dst.u.sctp.port; } if (hdrsize < sizeof(*hdr)) return true; if (skb->ip_summed != CHECKSUM_PARTIAL) { hdr->checksum = sctp_compute_cksum(skb, hdroff); skb->ip_summed = CHECKSUM_NONE; } return true; }


Patrick McHardy11462.64%333.33%
Ying Xue4122.53%111.11%
Davide Caratti168.79%111.11%
Joe Stringer42.20%111.11%
Jan Engelhardt31.65%111.11%
Xin Long21.10%111.11%
Simon Horman21.10%111.11%

const struct nf_nat_l4proto nf_nat_l4proto_sctp = { .l4proto = IPPROTO_SCTP, .manip_pkt = sctp_manip_pkt, .in_range = nf_nat_l4proto_in_range, .unique_tuple = sctp_unique_tuple, #if IS_ENABLED(CONFIG_NF_CT_NETLINK) .nlattr_to_range = nf_nat_l4proto_nlattr_to_range, #endif };

Overall Contributors

Patrick McHardy21875.43%327.27%
Ying Xue4114.19%19.09%
Davide Caratti165.54%19.09%
Joe Stringer41.38%19.09%
Jan Engelhardt31.04%19.09%
Changli Gao20.69%19.09%
Xin Long20.69%19.09%
Simon Horman20.69%19.09%
Duan Jiong10.35%19.09%
Directory: net/netfilter
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