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Release 4.11 net/netfilter/nf_conntrack_proto_generic.c

Directory: net/netfilter
/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * 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/jiffies.h>
#include <linux/timer.h>
#include <linux/netfilter.h>
#include <net/netfilter/nf_conntrack_l4proto.h>


static unsigned int nf_ct_generic_timeout __read_mostly = 600*HZ;


static bool nf_generic_should_process(u8 proto) { switch (proto) { #ifdef CONFIG_NF_CT_PROTO_SCTP_MODULE case IPPROTO_SCTP: return false; #endif #ifdef CONFIG_NF_CT_PROTO_DCCP_MODULE case IPPROTO_DCCP: return false; #endif #ifdef CONFIG_NF_CT_PROTO_GRE_MODULE case IPPROTO_GRE: return false; #endif #ifdef CONFIG_NF_CT_PROTO_UDPLITE_MODULE case IPPROTO_UDPLITE: return false; #endif default: return true; } }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal63100.00%1100.00%
Total63100.00%1100.00%


static inline struct nf_generic_net *generic_pernet(struct net *net) { return &net->ct.nf_ct_proto.generic; }

Contributors

PersonTokensPropCommitsCommitProp
Gao Feng24100.00%1100.00%
Total24100.00%1100.00%


static bool generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, struct net *net, struct nf_conntrack_tuple *tuple) { tuple->src.u.all = 0; tuple->dst.u.all = 0; return true; }

Contributors

PersonTokensPropCommitsCommitProp
Yasuyuki Kozakai4285.71%133.33%
Eric W. Biedermann510.20%133.33%
Jan Engelhardt24.08%133.33%
Total49100.00%3100.00%


static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *orig) { tuple->src.u.all = 0; tuple->dst.u.all = 0; return true; }

Contributors

PersonTokensPropCommitsCommitProp
Yasuyuki Kozakai3895.00%150.00%
Jan Engelhardt25.00%150.00%
Total40100.00%2100.00%

/* Print out the per-protocol part of the tuple. */
static void generic_print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple) { }

Contributors

PersonTokensPropCommitsCommitProp
Yasuyuki Kozakai1487.50%150.00%
Joe Perches212.50%150.00%
Total16100.00%2100.00%


static unsigned int *generic_get_timeouts(struct net *net) { return &(generic_pernet(net)->timeout); }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso1666.67%150.00%
Gao Feng833.33%150.00%
Total24100.00%2100.00%

/* Returns verdict for packet, or -1 for invalid. */
static int generic_packet(struct nf_conn *ct, const struct sk_buff *skb, unsigned int dataoff, enum ip_conntrack_info ctinfo, u_int8_t pf, unsigned int hooknum, unsigned int *timeout) { nf_ct_refresh_acct(ct, ctinfo, skb, *timeout); return NF_ACCEPT; }

Contributors

PersonTokensPropCommitsCommitProp
Yasuyuki Kozakai4178.85%125.00%
Pablo Neira Ayuso815.38%125.00%
Patrick McHardy23.85%125.00%
Jan Engelhardt11.92%125.00%
Total52100.00%4100.00%

/* Called when a new connection for this protocol found. */
static bool generic_new(struct nf_conn *ct, const struct sk_buff *skb, unsigned int dataoff, unsigned int *timeouts) { bool ret; ret = nf_generic_should_process(nf_ct_protonum(ct)); if (!ret) pr_warn_once("conntrack: generic helper won't handle protocol %d. Please consider loading the specific helper module.\n", nf_ct_protonum(ct)); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Marcelo Ricardo Leitner2340.35%116.67%
Yasuyuki Kozakai1933.33%116.67%
Florian Westphal712.28%116.67%
Pablo Neira Ayuso610.53%116.67%
Patrick McHardy11.75%116.67%
Jan Engelhardt11.75%116.67%
Total57100.00%6100.00%

#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) #include <linux/netfilter/nfnetlink.h> #include <linux/netfilter/nfnetlink_cttimeout.h>
static int generic_timeout_nlattr_to_obj(struct nlattr *tb[], struct net *net, void *data) { unsigned int *timeout = data; struct nf_generic_net *gn = generic_pernet(net); if (tb[CTA_TIMEOUT_GENERIC_TIMEOUT]) *timeout = ntohl(nla_get_be32(tb[CTA_TIMEOUT_GENERIC_TIMEOUT])) * HZ; else { /* Set default generic timeout. */ *timeout = gn->timeout; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso5776.00%150.00%
Gao Feng1824.00%150.00%
Total75100.00%2100.00%


static int generic_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) { const unsigned int *timeout = data; if (nla_put_be32(skb, CTA_TIMEOUT_GENERIC_TIMEOUT, htonl(*timeout / HZ))) goto nla_put_failure; return 0; nla_put_failure: return -ENOSPC; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso4686.79%150.00%
David S. Miller713.21%150.00%
Total53100.00%2100.00%

static const struct nla_policy generic_timeout_nla_policy[CTA_TIMEOUT_GENERIC_MAX+1] = { [CTA_TIMEOUT_GENERIC_TIMEOUT] = { .type = NLA_U32 }, }; #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ #ifdef CONFIG_SYSCTL static struct ctl_table generic_sysctl_table[] = { { .procname = "nf_conntrack_generic_timeout", .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { } }; #endif /* CONFIG_SYSCTL */
static int generic_kmemdup_sysctl_table(struct nf_proto_net *pn, struct nf_generic_net *gn) { #ifdef CONFIG_SYSCTL pn->ctl_table = kmemdup(generic_sysctl_table, sizeof(generic_sysctl_table), GFP_KERNEL); if (!pn->ctl_table) return -ENOMEM; pn->ctl_table[0].data = &gn->timeout; #endif return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Gao Feng65100.00%3100.00%
Total65100.00%3100.00%


static int generic_init_net(struct net *net, u_int16_t proto) { struct nf_generic_net *gn = generic_pernet(net); struct nf_proto_net *pn = &gn->pn; gn->timeout = nf_ct_generic_timeout; return generic_kmemdup_sysctl_table(pn, gn); }

Contributors

PersonTokensPropCommitsCommitProp
Gao Feng48100.00%1100.00%
Total48100.00%1100.00%


static struct nf_proto_net *generic_get_net_proto(struct net *net) { return &net->ct.nf_ct_proto.generic.pn; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso25100.00%1100.00%
Total25100.00%1100.00%

struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly = { .l3proto = PF_UNSPEC, .l4proto = 255, .name = "unknown", .pkt_to_tuple = generic_pkt_to_tuple, .invert_tuple = generic_invert_tuple, .print_tuple = generic_print_tuple, .packet = generic_packet, .get_timeouts = generic_get_timeouts, .new = generic_new, #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) .ctnl_timeout = { .nlattr_to_obj = generic_timeout_nlattr_to_obj, .obj_to_nlattr = generic_timeout_obj_to_nlattr, .nlattr_max = CTA_TIMEOUT_GENERIC_MAX, .obj_size = sizeof(unsigned int), .nla_policy = generic_timeout_nla_policy, }, #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ .init_net = generic_init_net, .get_net_proto = generic_get_net_proto, };

Overall Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso25231.27%312.00%
Yasuyuki Kozakai21626.80%14.00%
Gao Feng16820.84%416.00%
Florian Westphal708.68%14.00%
Patrick McHardy496.08%520.00%
Marcelo Ricardo Leitner232.85%14.00%
David S. Miller70.87%14.00%
Eric W. Biedermann60.74%28.00%
Jan Engelhardt60.74%28.00%
Martin Josefsson40.50%14.00%
Joe Perches20.25%14.00%
Christoph Paasch10.12%14.00%
Brian Haley10.12%14.00%
Tim Schmielau10.12%14.00%
Total806100.00%25100.00%
Directory: net/netfilter
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