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Release 4.8 net/netfilter/ipset/ip_set_hash_netportnet.c

/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
 *
 * 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.
 */

/* Kernel module implementing an IP set type: the hash:ip,port,net type */

#include <linux/jhash.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/random.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/netlink.h>
#include <net/tcp.h>

#include <linux/netfilter.h>
#include <linux/netfilter/ipset/pfxlen.h>
#include <linux/netfilter/ipset/ip_set.h>
#include <linux/netfilter/ipset/ip_set_getport.h>
#include <linux/netfilter/ipset/ip_set_hash.h>


#define IPSET_TYPE_REV_MIN	0
/*                              0    Comments support added */
/*                              1    Forceadd support added */

#define IPSET_TYPE_REV_MAX	2 
/* skbinfo support added */

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
IP_SET_MODULE_DESC("hash:net,port,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_hash:net,port,net");

/* Type specific function prefix */

#define HTYPE		hash_netportnet

#define IP_SET_HASH_WITH_PROTO

#define IP_SET_HASH_WITH_NETS

#define IPSET_NET_COUNT 2

/* IPv4 variant */

/* Member elements */

struct hash_netportnet4_elem {
	union {
		
__be32 ip[2];
		
__be64 ipcmp;
	};
	
__be16 port;
	union {
		
u8 cidr[2];
		
u16 ccmp;
	};
	
u16 padding;
	
u8 nomatch;
	
u8 proto;
};

/* Common functions */


static inline bool hash_netportnet4_data_equal(const struct hash_netportnet4_elem *ip1, const struct hash_netportnet4_elem *ip2, u32 *multi) { return ip1->ipcmp == ip2->ipcmp && ip1->ccmp == ip2->ccmp && ip1->port == ip2->port && ip1->proto == ip2->proto; }

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static inline int hash_netportnet4_do_data_match(const struct hash_netportnet4_elem *elem) { return elem->nomatch ? -ENOTEMPTY : 1; }

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static inline void hash_netportnet4_data_set_flags(struct hash_netportnet4_elem *elem, u32 flags) { elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH); }

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static inline void hash_netportnet4_data_reset_flags(struct hash_netportnet4_elem *elem, u8 *flags) { swap(*flags, elem->nomatch); }

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static inline void hash_netportnet4_data_reset_elem(struct hash_netportnet4_elem *elem, struct hash_netportnet4_elem *orig) { elem->ip[1] = orig->ip[1]; }

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static inline void hash_netportnet4_data_netmask(struct hash_netportnet4_elem *elem, u8 cidr, bool inner) { if (inner) { elem->ip[1] &= ip_set_netmask(cidr); elem->cidr[1] = cidr; } else { elem->ip[0] &= ip_set_netmask(cidr); elem->cidr[0] = cidr; } }

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static bool hash_netportnet4_data_list(struct sk_buff *skb, const struct hash_netportnet4_elem *data) { u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) || nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) || nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) || nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) || nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) || (flags && nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) goto nla_put_failure; return false; nla_put_failure: return true; }

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static inline void hash_netportnet4_data_next(struct hash_netportnet4_elem *next, const struct hash_netportnet4_elem *d) { next->ipcmp = d->ipcmp; next->port = d->port; }

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#define MTYPE hash_netportnet4 #define HOST_MASK 32 #include "ip_set_hash_gen.h"
static void hash_netportnet4_init(struct hash_netportnet4_elem *e) { e->cidr[0] = HOST_MASK; e->cidr[1] = HOST_MASK; }

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static int hash_netportnet4_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, enum ipset_adt adt, struct ip_set_adt_opt *opt) { const struct hash_netportnet *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_netportnet4_elem e = { }; struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK); e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK); if (adt == IPSET_TEST) e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK; if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.port, &e.proto)) return -EINVAL; ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]); ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1]); e.ip[0] &= ip_set_netmask(e.cidr[0]); e.ip[1] &= ip_set_netmask(e.cidr[1]); return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags); }

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static int hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) { const struct hash_netportnet *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_netportnet4_elem e = { }; struct ip_set_ext ext = IP_SET_INIT_UEXT(set); u32 ip = 0, ip_to = 0, ip_last, p = 0, port, port_to; u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2; bool with_ports = false; int ret; if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); hash_netportnet4_init(&e); if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] || !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) || !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) || !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) return -IPSET_ERR_PROTOCOL; ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); if (ret) return ret; ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from); if (ret) return ret; ret = ip_set_get_extensions(set, tb, &ext); if (ret) return ret; if (tb[IPSET_ATTR_CIDR]) { e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]); if (!e.cidr[0] || e.cidr[0] > HOST_MASK) return -IPSET_ERR_INVALID_CIDR; } if (tb[IPSET_ATTR_CIDR2]) { e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]); if (!e.cidr[1] || e.cidr[1] > HOST_MASK) return -IPSET_ERR_INVALID_CIDR; } e.port = nla_get_be16(tb[IPSET_ATTR_PORT]); if (tb[IPSET_ATTR_PROTO]) { e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]); with_ports = ip_set_proto_with_ports(e.proto); if (e.proto == 0) return -IPSET_ERR_INVALID_PROTO; } else { return -IPSET_ERR_MISSING_PROTO; } if (!(with_ports || e.proto == IPPROTO_ICMP)) e.port = 0; if (tb[IPSET_ATTR_CADT_FLAGS]) { u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); if (cadt_flags & IPSET_FLAG_NOMATCH) flags |= (IPSET_FLAG_NOMATCH << 16); } with_ports = with_ports && tb[IPSET_ATTR_PORT_TO]; if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] || with_ports || tb[IPSET_ATTR_IP2_TO])) { e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0])); e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1])); ret = adtfn(set, &e, &ext, &ext, flags); return ip_set_enomatch(ret, flags, adt, set) ? -ret : ip_set_eexist(ret, flags) ? 0 : ret; } ip_to = ip; if (tb[IPSET_ATTR_IP_TO]) { ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); if (ret) return ret; if (ip > ip_to) swap(ip, ip_to); if (unlikely(ip + UINT_MAX == ip_to)) return -IPSET_ERR_HASH_RANGE; } else { ip_set_mask_from_to(ip, ip_to, e.cidr[0]); } port_to = port = ntohs(e.port); if (tb[IPSET_ATTR_PORT_TO]) { port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); if (port > port_to) swap(port, port_to); } ip2_to = ip2_from; if (tb[IPSET_ATTR_IP2_TO]) { ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to); if (ret) return ret; if (ip2_from > ip2_to) swap(ip2_from, ip2_to); if (unlikely(ip2_from + UINT_MAX == ip2_to)) return -IPSET_ERR_HASH_RANGE; } else { ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]); } if (retried) ip = ntohl(h->next.ip[0]); while (!after(ip, ip_to)) { e.ip[0] = htonl(ip); ip_last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]); p = retried && ip == ntohl(h->next.ip[0]) ? ntohs(h->next.port) : port; for (; p <= port_to; p++) { e.port = htons(p); ip2 = (retried && ip == ntohl(h->next.ip[0]) && p == ntohs(h->next.port)) ? ntohl(h->next.ip[1]) : ip2_from; while (!after(ip2, ip2_to)) { e.ip[1] = htonl(ip2); ip2_last = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]); ret = adtfn(set, &e, &ext, &ext, flags); if (ret && !ip_set_eexist(ret, flags)) return ret; ret = 0; ip2 = ip2_last + 1; } } ip = ip_last + 1; } return ret; }

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Total1010100.00%7100.00%

/* IPv6 variant */ struct hash_netportnet6_elem { union nf_inet_addr ip[2]; __be16 port; union { u8 cidr[2]; u16 ccmp; }; u16 padding; u8 nomatch; u8 proto; }; /* Common functions */
static inline bool hash_netportnet6_data_equal(const struct hash_netportnet6_elem *ip1, const struct hash_netportnet6_elem *ip2, u32 *multi) { return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) && ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) && ip1->ccmp == ip2->ccmp && ip1->port == ip2->port && ip1->proto == ip2->proto; }

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static inline int hash_netportnet6_do_data_match(const struct hash_netportnet6_elem *elem) { return elem->nomatch ? -ENOTEMPTY : 1; }

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static inline void hash_netportnet6_data_set_flags(struct hash_netportnet6_elem *elem, u32 flags) { elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH); }

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static inline void hash_netportnet6_data_reset_flags(struct hash_netportnet6_elem *elem, u8 *flags) { swap(*flags, elem->nomatch); }

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static inline void hash_netportnet6_data_reset_elem(struct hash_netportnet6_elem *elem, struct hash_netportnet6_elem *orig) { elem->ip[1] = orig->ip[1]; }

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static inline void hash_netportnet6_data_netmask(struct hash_netportnet6_elem *elem, u8 cidr, bool inner) { if (inner) { ip6_netmask(&elem->ip[1], cidr); elem->cidr[1] = cidr; } else { ip6_netmask(&elem->ip[0], cidr); elem->cidr[0] = cidr; } }

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static bool hash_netportnet6_data_list(struct sk_buff *skb, const struct hash_netportnet6_elem *data) { u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) || nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) || nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) || nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) || nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) || (flags && nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) goto nla_put_failure; return false; nla_put_failure: return true; }

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static inline void hash_netportnet6_data_next(struct hash_netportnet4_elem *next, const struct hash_netportnet6_elem *d) { next->port = d->port; }

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#undef MTYPE #undef HOST_MASK #define MTYPE hash_netportnet6 #define HOST_MASK 128 #define IP_SET_EMIT_CREATE #include "ip_set_hash_gen.h"
static void hash_netportnet6_init(struct hash_netportnet6_elem *e) { e->cidr[0] = HOST_MASK; e->cidr[1] = HOST_MASK; }

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static int hash_netportnet6_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, enum ipset_adt adt, struct ip_set_adt_opt *opt) { const struct hash_netportnet *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_netportnet6_elem e = { }; struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); e.cidr[0] = INIT_CIDR(h->nets[0].cidr[0], HOST_MASK); e.cidr[1] = INIT_CIDR(h->nets[0].cidr[1], HOST_MASK); if (adt == IPSET_TEST) e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK; if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.port, &e.proto)) return -EINVAL; ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6); ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1].in6); ip6_netmask(&e.ip[0], e.cidr[0]); ip6_netmask(&e.ip[1], e.cidr[1]); return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags); }

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static int hash_netportnet6_uadt(struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) { const struct hash_netportnet *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_netportnet6_elem e = { }; struct ip_set_ext ext = IP_SET_INIT_UEXT(set); u32 port, port_to; bool with_ports = false; int ret; if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); hash_netportnet6_init(&e); if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] || !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) || !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) || !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) return -IPSET_ERR_PROTOCOL; if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO])) return -IPSET_ERR_HASH_RANGE_UNSUPPORTED; ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]); if (ret) return ret; ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]); if (ret) return ret; ret = ip_set_get_extensions(set, tb, &ext); if (ret) return ret; if (tb[IPSET_ATTR_CIDR]) { e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]); if (!e.cidr[0] || e.cidr[0] > HOST_MASK) return -IPSET_ERR_INVALID_CIDR; } if (tb[IPSET_ATTR_CIDR2]) { e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]); if (!e.cidr[1] || e.cidr[1] > HOST_MASK) return -IPSET_ERR_INVALID_CIDR; } ip6_netmask(&e.ip[0], e.cidr[0]); ip6_netmask(&e.ip[1], e.cidr[1]); e.port = nla_get_be16(tb[IPSET_ATTR_PORT]); if (tb[IPSET_ATTR_PROTO]) { e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]); with_ports = ip_set_proto_with_ports(e.proto); if (e.proto == 0) return -IPSET_ERR_INVALID_PROTO; } else { return -IPSET_ERR_MISSING_PROTO; } if (!(with_ports || e.proto == IPPROTO_ICMPV6)) e.port = 0; if (tb[IPSET_ATTR_CADT_FLAGS]) { u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); if (cadt_flags & IPSET_FLAG_NOMATCH) flags |= (IPSET_FLAG_NOMATCH << 16); } if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) { ret = adtfn(set, &e, &ext, &ext, flags); return ip_set_enomatch(ret, flags, adt, set) ? -ret : ip_set_eexist(ret, flags) ? 0 : ret; } port = ntohs(e.port); port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); if (port > port_to) swap(port, port_to); if (retried) port = ntohs(h->next.port); for (; port <= port_to; port++) { e.port = htons(port); ret = adtfn(set, &e, &ext, &ext, flags); if (ret && !ip_set_eexist(ret, flags)) return ret; ret = 0; } return ret; }

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static struct ip_set_type hash_netportnet_type __read_mostly = { .name = "hash:net,port,net", .protocol = IPSET_PROTOCOL, .features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 | IPSET_TYPE_NOMATCH, .dimension = IPSET_DIM_THREE, .family = NFPROTO_UNSPEC, .revision_min = IPSET_TYPE_REV_MIN, .revision_max = IPSET_TYPE_REV_MAX, .create = hash_netportnet_create, .create_policy = { [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 }, [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 }, [IPSET_ATTR_PROBES] = { .type = NLA_U8 }, [IPSET_ATTR_RESIZE] = { .type = NLA_U8 }, [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, }, .adt_policy = { [IPSET_ATTR_IP] = { .type = NLA_NESTED }, [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, [IPSET_ATTR_IP2] = { .type = NLA_NESTED }, [IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED }, [IPSET_ATTR_PORT] = { .type = NLA_U16 }, [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 }, [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, [IPSET_ATTR_CIDR2] = { .type = NLA_U8 }, [IPSET_ATTR_PROTO] = { .type = NLA_U8 }, [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, [IPSET_ATTR_BYTES] = { .type = NLA_U64 }, [IPSET_ATTR_PACKETS] = { .type = NLA_U64 }, [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING, .len = IPSET_MAX_COMMENT_SIZE }, [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 }, [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 }, [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 }, }, .me = THIS_MODULE, };
static int __init hash_netportnet_init(void) { return ip_set_type_register(&hash_netportnet_type); }

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static void __exit hash_netportnet_fini(void) { rcu_barrier(); ip_set_type_unregister(&hash_netportnet_type); }

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jozsef kadlecsikjozsef kadlecsik316.67%150.00%
Total18100.00%2100.00%

module_init(hash_netportnet_init); module_exit(hash_netportnet_fini);

Overall Contributors

PersonTokensPropCommitsCommitProp
oliver smitholiver smith336590.77%16.67%
sergey popovichsergey popovich1744.69%640.00%
elad razelad raz721.94%16.67%
jozsef kadlecsikjozsef kadlecsik591.59%533.33%
anton danilovanton danilov360.97%16.67%
josh huntjosh hunt10.03%16.67%
Total3707100.00%15100.00%
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