diff options
Diffstat (limited to 'net/netfilter/nf_nat_proto_sctp.c')
-rw-r--r-- | net/netfilter/nf_nat_proto_sctp.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/net/netfilter/nf_nat_proto_sctp.c b/net/netfilter/nf_nat_proto_sctp.c deleted file mode 100644 index 1c5d9b65fbba..000000000000 --- a/net/netfilter/nf_nat_proto_sctp.c +++ /dev/null @@ -1,77 +0,0 @@ -/* - * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> - * - * 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_range2 *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); -} - -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; -} - -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 -}; |