cregit-Linux how code gets into the kernel

Release 4.11 net/ipv6/udp.c

Directory: net/ipv6
/*
 *      UDP over IPv6
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *
 *      Based on linux/ipv4/udp.c
 *
 *      Fixes:
 *      Hideaki YOSHIFUJI       :       sin6_scope_id support
 *      YOSHIFUJI Hideaki @USAGI and:   Support IPV6_V6ONLY socket option, which
 *      Alexey Kuznetsov                allow both IPv4 and IPv6 sockets to bind
 *                                      a single port at the same time.
 *      Kazunori MIYAZAWA @USAGI:       change process style to use ip6_append_data
 *      YOSHIFUJI Hideaki @USAGI:       convert /proc/net/udp6 to seq_file.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/uaccess.h>

#include <net/addrconf.h>
#include <net/ndisc.h>
#include <net/protocol.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/raw.h>
#include <net/tcp_states.h>
#include <net/ip6_checksum.h>
#include <net/xfrm.h>
#include <net/inet6_hashtables.h>
#include <net/busy_poll.h>
#include <net/sock_reuseport.h>

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <trace/events/skb.h>
#include "udp_impl.h"


static bool udp6_lib_exact_dif_match(struct net *net, struct sk_buff *skb) { #if defined(CONFIG_NET_L3_MASTER_DEV) if (!net->ipv4.sysctl_udp_l3mdev_accept && skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) return true; #endif return false; }

Contributors

PersonTokensPropCommitsCommitProp
Robert Shearman51100.00%1100.00%
Total51100.00%1100.00%


static u32 udp6_ehashfn(const struct net *net, const struct in6_addr *laddr, const u16 lport, const struct in6_addr *faddr, const __be16 fport) { static u32 udp6_ehash_secret __read_mostly; static u32 udp_ipv6_hash_secret __read_mostly; u32 lhash, fhash; net_get_random_once(&udp6_ehash_secret, sizeof(udp6_ehash_secret)); net_get_random_once(&udp_ipv6_hash_secret, sizeof(udp_ipv6_hash_secret)); lhash = (__force u32)laddr->s6_addr32[3]; fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret); return __inet6_ehashfn(lhash, lport, fhash, fport, udp_ipv6_hash_secret + net_hash_mix(net)); }

Contributors

PersonTokensPropCommitsCommitProp
Hannes Frederic Sowa10797.27%250.00%
Eric Dumazet21.82%125.00%
Vladislav Yasevich10.91%125.00%
Total110100.00%4100.00%


static u32 udp6_portaddr_hash(const struct net *net, const struct in6_addr *addr6, unsigned int port) { unsigned int hash, mix = net_hash_mix(net); if (ipv6_addr_any(addr6)) hash = jhash_1word(0, mix); else if (ipv6_addr_v4mapped(addr6)) hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); else hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); return hash ^ port; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet9898.99%375.00%
Brian Haley11.01%125.00%
Total99100.00%4100.00%


int udp_v6_get_port(struct sock *sk, unsigned short snum) { unsigned int hash2_nulladdr = udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); unsigned int hash2_partial = udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); /* precompute partial secondary hash */ udp_sk(sk)->udp_portaddr_hash = hash2_partial; return udp_lib_get_port(sk, snum, hash2_nulladdr); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet4767.14%327.27%
Linus Torvalds (pre-git)1724.29%436.36%
Arnaldo Carvalho de Melo45.71%218.18%
Pavel Emelyanov11.43%19.09%
Gerrit Renker11.43%19.09%
Total70100.00%11100.00%


static void udp_v6_rehash(struct sock *sk) { u16 new_hash = udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, inet_sk(sk)->inet_num); udp_lib_rehash(sk, new_hash); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet41100.00%2100.00%
Total41100.00%2100.00%


static int compute_score(struct sock *sk, struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, unsigned short hnum, int dif, bool exact_dif) { int score; struct inet_sock *inet; if (!net_eq(sock_net(sk), net) || udp_sk(sk)->udp_port_hash != hnum || sk->sk_family != PF_INET6) return -1; score = 0; inet = inet_sk(sk); if (inet->inet_dport) { if (inet->inet_dport != sport) return -1; score++; } if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) return -1; score++; } if (!ipv6_addr_any(&sk->sk_v6_daddr)) { if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) return -1; score++; } if (sk->sk_bound_dev_if || exact_dif) { if (sk->sk_bound_dev_if != dif) return -1; score++; } if (sk->sk_incoming_cpu == raw_smp_processor_id()) score++; return score; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)10949.32%419.05%
Eric Dumazet5826.24%628.57%
Joe Perches198.60%14.76%
Hideaki Yoshifuji / 吉藤英明114.98%314.29%
Pavel Emelyanov83.62%14.76%
Robert Shearman52.26%14.76%
Arnaldo Carvalho de Melo31.36%14.76%
Xuemin Su31.36%14.76%
Balazs Scheidler20.90%14.76%
David S. Miller20.90%14.76%
Gerrit Renker10.45%14.76%
Total221100.00%21100.00%

/* called with rcu_read_lock() */
static struct sock *udp6_lib_lookup2(struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, unsigned int hnum, int dif, bool exact_dif, struct udp_hslot *hslot2, struct sk_buff *skb) { struct sock *sk, *result; int score, badness, matches = 0, reuseport = 0; u32 hash = 0; result = NULL; badness = -1; udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) { score = compute_score(sk, net, saddr, sport, daddr, hnum, dif, exact_dif); if (score > badness) { reuseport = sk->sk_reuseport; if (reuseport) { hash = udp6_ehashfn(net, daddr, hnum, saddr, sport); result = reuseport_select_sock(sk, hash, skb, sizeof(struct udphdr)); if (result) return result; matches = 1; } result = sk; badness = score; } else if (score == badness && reuseport) { matches++; if (reciprocal_scale(hash, matches) == 0) result = sk; hash = next_pseudo_random32(hash); } } return result; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet11250.45%327.27%
Tom Herbert7332.88%19.09%
Craig Gallek2611.71%327.27%
Robert Shearman52.25%19.09%
Daniel Borkmann41.80%19.09%
Xuemin Su10.45%19.09%
Hannes Frederic Sowa10.45%19.09%
Total222100.00%11100.00%

/* rcu_read_lock() must be held */
struct sock *__udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, __be16 dport, int dif, struct udp_table *udptable, struct sk_buff *skb) { struct sock *sk, *result; unsigned short hnum = ntohs(dport); unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; bool exact_dif = udp6_lib_exact_dif_match(net, skb); int score, badness, matches = 0, reuseport = 0; u32 hash = 0; if (hslot->count > 10) { hash2 = udp6_portaddr_hash(net, daddr, hnum); slot2 = hash2 & udptable->mask; hslot2 = &udptable->hash2[slot2]; if (hslot->count < hslot2->count) goto begin; result = udp6_lib_lookup2(net, saddr, sport, daddr, hnum, dif, exact_dif, hslot2, skb); if (!result) { unsigned int old_slot2 = slot2; hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); slot2 = hash2 & udptable->mask; /* avoid searching the same slot again. */ if (unlikely(slot2 == old_slot2)) return result; hslot2 = &udptable->hash2[slot2]; if (hslot->count < hslot2->count) goto begin; result = udp6_lib_lookup2(net, saddr, sport, daddr, hnum, dif, exact_dif, hslot2, skb); } return result; } begin: result = NULL; badness = -1; sk_for_each_rcu(sk, &hslot->head) { score = compute_score(sk, net, saddr, sport, daddr, hnum, dif, exact_dif); if (score > badness) { reuseport = sk->sk_reuseport; if (reuseport) { hash = udp6_ehashfn(net, daddr, hnum, saddr, sport); result = reuseport_select_sock(sk, hash, skb, sizeof(struct udphdr)); if (result) return result; matches = 1; } result = sk; badness = score; } else if (score == badness && reuseport) { matches++; if (reciprocal_scale(hash, matches) == 0) result = sk; hash = next_pseudo_random32(hash); } } return result; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet27962.98%635.29%
Tom Herbert7216.25%15.88%
Craig Gallek296.55%317.65%
Xuemin Su214.74%15.88%
Linus Torvalds (pre-git)184.06%15.88%
Robert Shearman163.61%15.88%
Daniel Borkmann40.90%15.88%
Balazs Scheidler20.45%15.88%
Jorge Boncompte10.23%15.88%
Hannes Frederic Sowa10.23%15.88%
Total443100.00%17100.00%

EXPORT_SYMBOL_GPL(__udp6_lib_lookup);
static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, __be16 sport, __be16 dport, struct udp_table *udptable) { const struct ipv6hdr *iph = ipv6_hdr(skb); struct sock *sk; sk = skb_steal_sock(skb); if (unlikely(sk)) return sk; return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, &iph->daddr, dport, inet6_iif(skb), udptable, skb); }

Contributors

PersonTokensPropCommitsCommitProp
KOVACS Krisztian7582.42%228.57%
Ian Morris66.59%114.29%
Alexander Duyck55.49%114.29%
Eric Dumazet33.30%228.57%
Craig Gallek22.20%114.29%
Total91100.00%7100.00%


struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, __be16 sport, __be16 dport) { const struct ipv6hdr *iph = ipv6_hdr(skb); return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, &iph->daddr, dport, inet6_iif(skb), &udp_table, skb); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Herbert6296.88%150.00%
Alexander Duyck23.12%150.00%
Total64100.00%2100.00%

EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb); /* Must be called under rcu_read_lock(). * Does increment socket refcount. */ #if IS_ENABLED(CONFIG_NETFILTER_XT_MATCH_SOCKET) || \ IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TPROXY) || \ IS_ENABLED(CONFIG_NF_SOCKET_IPV6)
struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, __be16 dport, int dif) { struct sock *sk; sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table, NULL); if (sk && !atomic_inc_not_zero(&sk->sk_refcnt)) sk = NULL; return sk; }

Contributors

PersonTokensPropCommitsCommitProp
Balazs Scheidler4758.75%133.33%
Eric Dumazet3138.75%133.33%
Craig Gallek22.50%133.33%
Total80100.00%3100.00%

EXPORT_SYMBOL_GPL(udp6_lib_lookup); #endif /* * This should be easy, if there is something there we * return it, otherwise we block. */
int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock, int flags, int *addr_len) { struct ipv6_pinfo *np = inet6_sk(sk); struct inet_sock *inet = inet_sk(sk); struct sk_buff *skb; unsigned int ulen, copied; int peeked, peeking, off; int err; int is_udplite = IS_UDPLITE(sk); bool checksum_valid = false; int is_udp4; if (flags & MSG_ERRQUEUE) return ipv6_recv_error(sk, msg, len, addr_len); if (np->rxpmtu && np->rxopt.bits.rxpmtu) return ipv6_recv_rxpmtu(sk, msg, len, addr_len); try_again: peeking = off = sk_peek_offset(sk, flags); skb = __skb_recv_udp(sk, flags, noblock, &peeked, &off, &err); if (!skb) return err; ulen = skb->len; copied = len; if (copied > ulen - off) copied = ulen - off; else if (copied < ulen) msg->msg_flags |= MSG_TRUNC; is_udp4 = (skb->protocol == htons(ETH_P_IP)); /* * If checksum is needed at all, try to do it while copying the * data. If the data is truncated, or if we only want a partial * coverage checksum (UDP-Lite), do it before the copy. */ if (copied < ulen || peeking || (is_udplite && UDP_SKB_CB(skb)->partial_cov)) { checksum_valid = !udp_lib_checksum_complete(skb); if (!checksum_valid) goto csum_copy_err; } if (checksum_valid || skb_csum_unnecessary(skb)) err = skb_copy_datagram_msg(skb, off, msg, copied); else { err = skb_copy_and_csum_datagram_msg(skb, off, msg); if (err == -EINVAL) goto csum_copy_err; } if (unlikely(err)) { if (!peeked) { atomic_inc(&sk->sk_drops); if (is_udp4) UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); else UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); } kfree_skb(skb); return err; } if (!peeked) { if (is_udp4) UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, is_udplite); else UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, is_udplite); } sock_recv_ts_and_drops(msg, sk, skb); /* Copy the address. */ if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); sin6->sin6_family = AF_INET6; sin6->sin6_port = udp_hdr(skb)->source; sin6->sin6_flowinfo = 0; if (is_udp4) { ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, &sin6->sin6_addr); sin6->sin6_scope_id = 0; } else { sin6->sin6_addr = ipv6_hdr(skb)->saddr; sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, inet6_iif(skb)); } *addr_len = sizeof(*sin6); } if (np->rxopt.all) ip6_datagram_recv_common_ctl(sk, msg, skb); if (is_udp4) { if (inet->cmsg_flags) ip_cmsg_recv_offset(msg, sk, skb, sizeof(struct udphdr), off); } else { if (np->rxopt.all) ip6_datagram_recv_specific_ctl(sk, msg, skb); } err = copied; if (flags & MSG_TRUNC) err = ulen; skb_consume_udp(sk, skb, peeking ? -err : err); return err; csum_copy_err: if (!__sk_queue_drop_skb(sk, skb, flags, udp_skb_destructor)) { if (is_udp4) { UDP_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); } else { UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); } } kfree_skb(skb); /* starting over for a new packet, but check if we need to yield */ cond_resched(); msg->msg_flags &= ~MSG_TRUNC; goto try_again; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21630.29%1016.95%
Eric Dumazet11716.41%915.25%
Wei Yongjun547.57%23.39%
Herbert Xu496.87%58.47%
Hideaki Yoshifuji / 吉藤英明496.87%23.39%
Hannes Frederic Sowa466.45%46.78%
samanthakumar365.05%11.69%
Brian Haley304.21%23.39%
David S. Miller294.07%46.78%
Pavel Emelyanov152.10%23.39%
Gerrit Renker111.54%11.69%
Paolo Abeni91.26%35.08%
Arnaldo Carvalho de Melo91.26%35.08%
Samuel Thibault91.26%11.69%
Xufeng Zhang70.98%11.69%
Wang Chen60.84%11.69%
Steffen Hurrle60.84%11.69%
Linus Torvalds50.70%11.69%
Stephen Hemminger30.42%11.69%
Hideo Aoki30.42%11.69%
Duan Jiong10.14%11.69%
Neil Horman10.14%11.69%
Alexey Dobriyan10.14%11.69%
Al Viro10.14%11.69%
Total713100.00%59100.00%


void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, u8 type, u8 code, int offset, __be32 info, struct udp_table *udptable) { struct ipv6_pinfo *np; const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; const struct in6_addr *saddr = &hdr->saddr; const struct in6_addr *daddr = &hdr->daddr; struct udphdr *uh = (struct udphdr *)(skb->data+offset); struct sock *sk; int harderr; int err; struct net *net = dev_net(skb->dev); sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, inet6_iif(skb), udptable, skb); if (!sk) { __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS); return; } harderr = icmpv6_err_convert(type, code, &err); np = inet6_sk(sk); if (type == ICMPV6_PKT_TOOBIG) { if (!ip6_sk_accept_pmtu(sk)) goto out; ip6_sk_update_pmtu(skb, sk, info); if (np->pmtudisc != IPV6_PMTUDISC_DONT) harderr = 1; } if (type == NDISC_REDIRECT) { ip6_sk_redirect(skb, sk); goto out; } if (!np->recverr) { if (!harderr || sk->sk_state != TCP_ESTABLISHED) goto out; } else { ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); } sk->sk_err = err; sk->sk_error_report(sk); out: return; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12640.26%725.00%
Wei Wang4213.42%13.57%
David S. Miller3410.86%310.71%
Linus Torvalds3310.54%13.57%
Duan Jiong319.90%27.14%
Hannes Frederic Sowa134.15%13.57%
Eric Dumazet82.56%414.29%
Hideaki Yoshifuji / 吉藤英明72.24%27.14%
Gerrit Renker61.92%13.57%
Pavel Emelyanov41.28%13.57%
Arnaldo Carvalho de Melo30.96%13.57%
Brian Haley20.64%13.57%
Craig Gallek20.64%13.57%
Ian Morris10.32%13.57%
Al Viro10.32%13.57%
Total313100.00%28100.00%


int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) { int rc; if (!ipv6_addr_any(&sk->sk_v6_daddr)) { sock_rps_save_rxhash(sk, skb); sk_mark_napi_id(sk, skb); sk_incoming_cpu_update(sk); } else { sk_mark_napi_id_once(sk, skb); } rc = __udp_enqueue_schedule_skb(sk, skb); if (rc < 0) { int is_udplite = IS_UDPLITE(sk); /* Note that an ENOMEM error is charged twice */ if (rc == -ENOMEM) UDP6_INC_STATS(sock_net(sk), UDP_MIB_RCVBUFERRORS, is_udplite); UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); kfree_skb(skb); return -1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin LaHaise10178.29%114.29%
Eric Dumazet1813.95%457.14%
Shawn Bohrer96.98%114.29%
Paolo Abeni10.78%114.29%
Total129100.00%7100.00%


static __inline__ void udpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, u8 type, u8 code, int offset, __be32 info) { __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); }

Contributors

PersonTokensPropCommitsCommitProp
Gerrit Renker4085.11%116.67%
Eric Dumazet24.26%116.67%
Brian Haley24.26%116.67%
Linus Torvalds (pre-git)12.13%116.67%
Al Viro12.13%116.67%
Hideaki Yoshifuji / 吉藤英明12.13%116.67%
Total47100.00%6100.00%

static struct static_key udpv6_encap_needed __read_mostly;
void udpv6_encap_enable(void) { if (!static_key_enabled(&udpv6_encap_needed)) static_key_slow_inc(&udpv6_encap_needed); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin LaHaise22100.00%1100.00%
Total22100.00%1100.00%

EXPORT_SYMBOL(udpv6_encap_enable);
int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) { struct udp_sock *up = udp_sk(sk); int is_udplite = IS_UDPLITE(sk); if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) goto drop; if (static_key_false(&udpv6_encap_needed) && up->encap_type) { int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); /* * This is an encapsulation socket so pass the skb to * the socket's udp_encap_rcv() hook. Otherwise, just * fall through and pass this up the UDP socket. * up->encap_rcv() returns the following value: * =0 if skb was successfully passed to the encap * handler or was discarded by it. * >0 if skb should be passed on to UDP. * <0 if skb should be resubmitted as proto -N */ /* if we're overly short, let UDP handle it */ encap_rcv = ACCESS_ONCE(up->encap_rcv); if (encap_rcv) { int ret; /* Verify checksum before giving to encap */ if (udp_lib_checksum_complete(skb)) goto csum_error; ret = encap_rcv(sk, skb); if (ret <= 0) { __UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, is_udplite); return -ret; } } /* FALLTHROUGH -- it's a UDP Packet */ } /* * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). */ if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { if (up->pcrlen == 0) { /* full coverage was set */ net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n", UDP_SKB_CB(skb)->cscov, skb->len); goto drop; } if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n", UDP_SKB_CB(skb)->cscov, up->pcrlen); goto drop; } } if (rcu_access_pointer(sk->sk_filter) && udp_lib_checksum_complete(skb)) goto csum_error; if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) goto drop; udp_csum_pull_header(skb); skb_dst_drop(skb); return __udpv6_queue_rcv_skb(sk, skb); csum_error: __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); drop: __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); atomic_inc(&sk->sk_drops); kfree_skb(skb); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin LaHaise9629.63%312.00%
Gerrit Renker9128.09%14.00%
Linus Torvalds (pre-git)4212.96%416.00%
Eric Dumazet268.02%624.00%
Kazunori Miyazawa123.70%14.00%
Tom Herbert113.40%14.00%
samanthakumar113.40%14.00%
Michal Kubeček103.09%14.00%
Wang Chen92.78%14.00%
Pavel Emelyanov51.54%14.00%
Joe Perches41.23%14.00%
Herbert Xu30.93%14.00%
Daniel Borkmann20.62%14.00%
David S. Miller10.31%14.00%
Paolo Abeni10.31%14.00%
Total324100.00%25100.00%


static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk, __be16 loc_port, const struct in6_addr *loc_addr, __be16 rmt_port, const struct in6_addr *rmt_addr, int dif, unsigned short hnum) { struct inet_sock *inet = inet_sk(sk); if (!net_eq(sock_net(sk), net)) return false; if (udp_sk(sk)->udp_port_hash != hnum || sk->sk_family != PF_INET6 || (inet->inet_dport && inet->inet_dport != rmt_port) || (!ipv6_addr_any(&sk->sk_v6_daddr) && !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) || (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) || (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) && !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))) return false; if (!inet6_mc_check(sk, loc_addr, rmt_addr)) return false; return true; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6537.57%419.05%
David Held2715.61%14.76%
Henning Rogge2212.72%14.76%
Eric Dumazet2011.56%523.81%
David S. Miller126.94%29.52%
Sven Wegener95.20%14.76%
Hideaki Yoshifuji / 吉藤英明63.47%29.52%
Daniel Lezcano42.31%14.76%
Arnaldo Carvalho de Melo42.31%29.52%
David L Stevens21.16%14.76%
Al Viro21.16%14.76%
Total173100.00%21100.00%


static void udp6_csum_zero_error(struct sk_buff *skb) { /* RFC 2460 section 8.1 says that we SHOULD log * this error. Well, it is reasonable. */ net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n", &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source), &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest)); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Herbert5298.11%150.00%
Joe Perches11.89%150.00%
Total53100.00%2100.00%

/* * Note: called only from the BH handler context, * so we don't need to lock the hashes. */
static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, const struct in6_addr *saddr, const struct in6_addr *daddr, struct udp_table *udptable, int proto) { struct sock *sk, *first = NULL; const struct udphdr *uh = udp_hdr(skb); unsigned short hnum = ntohs(uh->dest); struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum); unsigned int offset = offsetof(typeof(*sk), sk_node); unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10); int dif = inet6_iif(skb); struct hlist_node *node; struct sk_buff *nskb; if (use_hash2) { hash2_any = udp6_portaddr_hash(net, &in6addr_any, hnum) & udptable->mask; hash2 = udp6_portaddr_hash(net, daddr, hnum) & udptable->mask; start_lookup: hslot = &udptable->hash2[hash2]; offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node); } sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) { if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr, uh->source, saddr, dif, hnum)) continue; /* If zero checksum and no_check is not on for * the socket then skip it. */ if (!uh->check && !udp_sk(sk)->no_check6_rx) continue; if (!first) { first = sk; continue; } nskb = skb_clone(skb, GFP_ATOMIC); if (unlikely(!nskb)) { atomic_inc(&sk->sk_drops); __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); __UDP6_INC_STATS(net, UDP_MIB_INERRORS, IS_UDPLITE(sk)); continue; } if (udpv6_queue_rcv_skb(sk, nskb) > 0) consume_skb(nskb); } /* Also lookup *:port if we are using hash2 and haven't done so yet. */ if (use_hash2 && hash2 != hash2_any) { hash2 = hash2_any; goto start_lookup; } if (first) { if (udpv6_queue_rcv_skb(first, skb) > 0) consume_skb(skb); } else { kfree_skb(skb); __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI, proto == IPPROTO_UDPLITE); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David Held13834.76%28.70%
Eric Dumazet13834.76%730.43%
Linus Torvalds (pre-git)4711.84%313.04%
Gerrit Renker164.03%14.35%
Rick Jones153.78%14.35%
Hideo Aoki133.27%14.35%
Tom Herbert102.52%28.70%
Pavel Emelyanov92.27%313.04%
Pablo Neira Ayuso61.51%14.35%
Arnaldo Carvalho de Melo30.76%14.35%
Hideaki Yoshifuji / 吉藤英明20.50%14.35%
Total397100.00%23100.00%


int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, int proto) { const struct in6_addr *saddr, *daddr; struct net *net = dev_net(skb->dev); struct udphdr *uh; struct sock *sk; u32 ulen = 0; if (!pskb_may_pull(skb, sizeof(struct udphdr))) goto discard; saddr = &ipv6_hdr(skb)->saddr; daddr = &ipv6_hdr(skb)->daddr; uh = udp_hdr(skb); ulen = ntohs(uh->len); if (ulen > skb->len) goto short_packet; if (proto == IPPROTO_UDP) { /* UDP validates ulen. */ /* Check for jumbo payload */ if (ulen == 0) ulen = skb->len; if (ulen < sizeof(*uh)) goto short_packet; if (ulen < skb->len) { if (pskb_trim_rcsum(skb, ulen)) goto short_packet; saddr = &ipv6_hdr(skb)->saddr; daddr = &ipv6_hdr(skb)->daddr; uh = udp_hdr(skb); } } if (udp6_csum_init(skb, uh, proto)) goto csum_error; /* * Multicast receive code */ if (ipv6_addr_is_multicast(daddr)) return __udp6_lib_mcast_deliver(net, skb, saddr, daddr, udptable, proto); /* Unicast */ /* * check socket cache ... must talk to Alan about his plans * for sock caches... i'll skip this for now. */ sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); if (sk) { int ret; if (!uh->check && !udp_sk(sk)->no_check6_rx) { udp6_csum_zero_error(skb); goto csum_error; } if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk)) skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, ip6_compute_pseudo); ret = udpv6_queue_rcv_skb(sk, skb); /* a return value > 0 means to resubmit the input */ if (ret > 0) return ret; return 0; } if (!uh->check) { udp6_csum_zero_error(skb); goto csum_error; } if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) goto discard; if (udp_lib_checksum_complete(skb)) goto csum_error; __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); kfree_skb(skb); return 0; short_packet: net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", proto == IPPROTO_UDPLITE ? "-Lite" : "", saddr, ntohs(uh->source), ulen, skb->len, daddr, ntohs(uh->dest)); goto discard; csum_error: __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); discard: __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); kfree_skb(skb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14729.82%411.76%
Linus Torvalds7415.01%12.94%
Tom Herbert7214.60%411.76%
Gerrit Renker438.72%12.94%
Eric Dumazet336.69%411.76%
Benjamin LaHaise214.26%12.94%
Björn Mork204.06%12.94%
Arnaldo Carvalho de Melo183.65%25.88%
Tom Lendacky153.04%12.94%
Alexey Dobriyan122.43%12.94%
Herbert Xu102.03%25.88%
David S. Miller61.22%12.94%
Pavel Emelyanov61.22%25.88%
Hideaki Yoshifuji / 吉藤英明51.01%38.82%
Eliezer Tamir40.81%12.94%
KOVACS Krisztian20.41%12.94%
Rick Jones20.41%12.94%
Joe Perches10.20%12.94%
Stephen Hemminger10.20%12.94%
Bill Sommerfeld10.20%12.94%
Total493100.00%34100.00%


static __inline__ int udpv6_rcv(struct sk_buff *skb) { return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); }

Contributors

PersonTokensPropCommitsCommitProp
Gerrit Renker1878.26%125.00%
Herbert Xu313.04%250.00%
Eric Dumazet28.70%125.00%
Total23100.00%4100.00%

/* * Throw away all pending data and cancel the corking. Socket is locked. */
static void udp_v6_flush_pending_frames(struct sock *sk) { struct udp_sock *up = udp_sk(sk); if (up->pending == AF_INET) udp_flush_pending_frames(sk); else if (up->pending) { up->len = 0; up->pending = 0; ip6_flush_pending_frames(sk); } }

Contributors

PersonTokensPropCommitsCommitProp
Kazunori Miyazawa3355.00%120.00%
Denis V. Lunev1423.33%120.00%
David S. Miller610.00%120.00%
Linus Torvalds (pre-git)610.00%120.00%
Arnaldo Carvalho de Melo11.67%120.00%
Total60100.00%5100.00%

/** * udp6_hwcsum_outgoing - handle outgoing HW checksumming * @sk: socket we are sending on * @skb: sk_buff containing the filled-in UDP header * (checksum field must be zeroed out) */
static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, const struct in6_addr *saddr, const struct in6_addr *daddr, int len) { unsigned int offset; struct udphdr *uh = udp_hdr(skb); struct sk_buff *frags = skb_shinfo(skb)->frag_list; __wsum csum = 0; if (!frags) { /* Only one fragment on the socket. */ skb->csum_start = skb_transport_header(skb) - skb->head; skb->csum_offset = offsetof(struct udphdr, check); uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); } else { /* * HW-checksum won't work as there are two or more * fragments on the socket so that all csums of sk_buffs * should be together */ offset = skb_transport_offset(skb); skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); skb->ip_summed = CHECKSUM_NONE; do { csum = csum_add(csum, frags->csum); } while ((frags = frags->next)); uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, csum); if (uh->check == 0) uh->check = CSUM_MANGLED_0; } }

Contributors

PersonTokensPropCommitsCommitProp
Sridhar Samudrala17886.83%150.00%
Vlad Yasevich2713.17%150.00%
Total205100.00%2100.00%

/* * Sending */
static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6) { struct sock *sk = skb->sk; struct udphdr *uh; int err = 0; int is_udplite = IS_UDPLITE(sk); __wsum csum = 0; int offset = skb_transport_offset(skb); int len = skb->len - offset; /* * Create a UDP header */ uh = udp_hdr(skb); uh->source = fl6->fl6_sport; uh->dest = fl6->fl6_dport; uh->len = htons(len); uh->check = 0; if (is_udplite) csum = udplite_csum(skb); else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */ skb->ip_summed = CHECKSUM_NONE; goto send; } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len); goto send; } else csum = udp_csum(skb); /* add protocol-dependent pseudo-header */ uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, len, fl6->flowi6_proto, csum); if (uh->check == 0) uh->check = CSUM_MANGLED_0; send: err = ip6_send_skb(skb); if (err) { if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { UDP6_INC_STATS(sock_net(sk), UDP_MIB_SNDBUFERRORS, is_udplite); err = 0; } } else { UDP6_INC_STATS(sock_net(sk), UDP_MIB_OUTDATAGRAMS, is_udplite); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Kazunori Miyazawa5619.65%14.55%
Eric Dumazet3813.33%29.09%
Gerrit Renker3712.98%29.09%
Vlad Yasevich3612.63%14.55%
Sridhar Samudrala3211.23%14.55%
Linus Torvalds (pre-git)258.77%29.09%
Tom Herbert186.32%29.09%
David S. Miller165.61%313.64%
Wang Chen103.51%14.55%
Hideaki Yoshifuji / 吉藤英明51.75%14.55%
Pavel Emelyanov51.75%14.55%
Arnaldo Carvalho de Melo31.05%14.55%
Al Viro20.70%29.09%
Hannes Frederic Sowa10.35%14.55%
Ian Morris10.35%14.55%
Total285100.00%22100.00%


static int udp_v6_push_pending_frames(struct sock *sk) { struct sk_buff *skb; struct udp_sock *up = udp_sk(sk); struct flowi6 fl6; int err = 0; if (up->pending == AF_INET) return udp_push_pending_frames(sk); /* ip6_finish_skb will release the cork, so make a copy of * fl6 here. */ fl6 = inet_sk(sk)->cork.fl.u.ip6; skb = ip6_finish_skb(sk); if (!skb) goto out; err = udp_v6_send_skb(skb, &fl6); out: up->len = 0; up->pending = 0; return err; }

Contributors

PersonTokensPropCommitsCommitProp
Vlad Yasevich8983.18%120.00%
Eric Dumazet1413.08%120.00%
Kazunori Miyazawa21.87%120.00%
Linus Torvalds (pre-git)21.87%240.00%
Total107100.00%5100.00%


int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { struct ipv6_txoptions opt_space; struct udp_sock *up = udp_sk(sk); struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk); DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); struct in6_addr *daddr, *final_p, final; struct ipv6_txoptions *opt = NULL; struct ipv6_txoptions *opt_to_free = NULL; struct ip6_flowlabel *flowlabel = NULL; struct flowi6 fl6; struct dst_entry *dst; struct ipcm6_cookie ipc6; int addr_len = msg->msg_namelen; int ulen = len; int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; int err; int connected = 0; int is_udplite = IS_UDPLITE(sk); int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); struct sockcm_cookie sockc; ipc6.hlimit = -1; ipc6.tclass = -1; ipc6.dontfrag = -1; sockc.tsflags = sk->sk_tsflags; /* destination address check */ if (sin6) { if (addr_len < offsetof(struct sockaddr, sa_data)) return -EINVAL; switch (sin6->sin6_family) { case AF_INET6: if (addr_len < SIN6_LEN_RFC2133) return -EINVAL; daddr = &sin6->sin6_addr; if (ipv6_addr_any(daddr) && ipv6_addr_v4mapped(&np->saddr)) ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), daddr); break; case AF_INET: goto do_udp_sendmsg; case AF_UNSPEC: msg->msg_name = sin6 = NULL; msg->msg_namelen = addr_len = 0; daddr = NULL; break; default: return -EINVAL; } } else if (!up->pending) { if (sk->sk_state != TCP_ESTABLISHED) return -EDESTADDRREQ; daddr = &sk->sk_v6_daddr; } else daddr = NULL; if (daddr) { if (ipv6_addr_v4mapped(daddr)) { struct sockaddr_in sin; sin.sin_family = AF_INET; sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; sin.sin_addr.s_addr = daddr->s6_addr32[3]; msg->msg_name = &sin; msg->msg_namelen = sizeof(sin); do_udp_sendmsg: if (__ipv6_only_sock(sk)) return -ENETUNREACH; return udp_sendmsg(sk, msg, len); } } if (up->pending == AF_INET) return udp_sendmsg(sk, msg, len); /* Rough check on arithmetic overflow, better check is made in ip6_append_data(). */ if (len > INT_MAX - sizeof(struct udphdr)) return -EMSGSIZE; getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; if (up->pending) { /* * There are pending frames. * The socket lock must be held while it's corked. */ lock_sock(sk); if (likely(up->pending)) { if (unlikely(up->pending != AF_INET6)) { release_sock(sk); return -EAFNOSUPPORT; } dst = NULL; goto do_append_data; } release_sock(sk); } ulen += sizeof(struct udphdr); memset(&fl6, 0, sizeof(fl6)); if (sin6) { if (sin6->sin6_port == 0) return -EINVAL; fl6.fl6_dport = sin6->sin6_port; daddr = &sin6->sin6_addr; if (np->sndflow) { fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (!flowlabel) return -EINVAL; } } /* * Otherwise it will be difficult to maintain * sk->sk_dst_cache. */ if (sk->sk_state == TCP_ESTABLISHED && ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) daddr = &sk->sk_v6_daddr; if (addr_len >= sizeof(struct sockaddr_in6) && sin6->sin6_scope_id && __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) fl6.flowi6_oif = sin6->sin6_scope_id; } else { if (sk->sk_state != TCP_ESTABLISHED) return -EDESTADDRREQ; fl6.fl6_dport = inet->inet_dport; daddr = &sk->sk_v6_daddr; fl6.flowlabel = np->flow_label; connected = 1; } if (!fl6.flowi6_oif) fl6.flowi6_oif = sk->sk_bound_dev_if; if (!fl6.flowi6_oif) fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; fl6.flowi6_mark = sk->sk_mark; fl6.flowi6_uid = sk->sk_uid; if (msg->msg_controllen) { opt = &opt_space; memset(opt, 0, sizeof(struct ipv6_txoptions)); opt->tot_len = sizeof(*opt); ipc6.opt = opt; err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc); if (err < 0) { fl6_sock_release(flowlabel); return err; } if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); if (!flowlabel) return -EINVAL; } if (!(opt->opt_nflen|opt->opt_flen)) opt = NULL; connected = 0; } if (!opt) { opt = txopt_get(np); opt_to_free = opt; } if (flowlabel) opt = fl6_merge_options(&opt_space, flowlabel, opt); opt = ipv6_fixup_options(&opt_space, opt); ipc6.opt = opt; fl6.flowi6_proto = sk->sk_protocol; if (!ipv6_addr_any(daddr)) fl6.daddr = *daddr; else fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) fl6.saddr = np->saddr; fl6.fl6_sport = inet->inet_sport; final_p = fl6_update_dst(&fl6, opt, &final); if (final_p) connected = 0; if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { fl6.flowi6_oif = np->mcast_oif; connected = 0; } else if (!fl6.flowi6_oif) fl6.flowi6_oif = np->ucast_oif; security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); if (ipc6.tclass < 0) ipc6.tclass = np->tclass; fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); if (IS_ERR(dst)) { err = PTR_ERR(dst); dst = NULL; goto out; } if (ipc6.hlimit < 0) ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); if (msg->msg_flags&MSG_CONFIRM) goto do_confirm; back_from_confirm: /* Lockless fast path for the non-corking case */ if (!corkreq) { struct sk_buff *skb; skb = ip6_make_skb(sk, getfrag, msg, ulen, sizeof(struct udphdr), &ipc6, &fl6, (struct rt6_info *)dst, msg->msg_flags, &sockc); err = PTR_ERR(skb); if (!IS_ERR_OR_NULL(skb)) err = udp_v6_send_skb(skb, &fl6); goto release_dst; } lock_sock(sk); if (unlikely(up->pending)) { /* The socket is already corked while preparing it. */ /* ... which is an evident application bug. --ANK */ release_sock(sk); net_dbg_ratelimited("udp cork app bug 2\n"); err = -EINVAL; goto out; } up->pending = AF_INET6; do_append_data: if (ipc6.dontfrag < 0) ipc6.dontfrag = np->dontfrag; up->len += ulen; err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr), &ipc6, &fl6, (struct rt6_info *)dst, corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, &sockc); if (err) udp_v6_flush_pending_frames(sk); else if (!corkreq) err = udp_v6_push_pending_frames(sk); else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) up->pending = 0; if (err > 0) err = np->recverr ? net_xmit_errno(err) : 0; release_sock(sk); release_dst: if (dst) { if (connected) { ip6_dst_store(sk, dst, ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? &sk->sk_v6_daddr : NULL, #ifdef CONFIG_IPV6_SUBTREES ipv6_addr_equal(&fl6.saddr, &np->saddr) ? &np->saddr : #endif NULL); } else { dst_release(dst); } dst = NULL; } out: dst_release(dst); fl6_sock_release(flowlabel); txopt_put(opt_to_free); if (!err) return len; /* * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting * ENOBUFS might not be good (it's not tunable per se), but otherwise * we don't have a good statistic (IpOutDiscards but it can be too many * things). We could add another new stat but at least for now that * seems like overkill. */ if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { UDP6_INC_STATS(sock_net(sk), UDP_MIB_SNDBUFERRORS, is_udplite); } return err; do_confirm: if (msg->msg_flags & MSG_PROBE) dst_confirm_neigh(dst, &fl6.daddr); if (!(msg->msg_flags&MSG_PROBE) || len) goto back_from_confirm; err = 0; goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Kazunori Miyazawa40824.42%22.56%
Hideaki Yoshifuji / 吉藤英明30318.13%911.54%
Linus Torvalds (pre-git)25215.08%1012.82%
David S. Miller1659.87%1114.10%
Vlad Yasevich1106.58%11.28%
Wei Wang502.99%11.28%
Herbert Xu452.69%22.56%
Eric Dumazet362.15%45.13%
Hannes Frederic Sowa352.09%22.56%
Gerrit Renker331.97%11.28%
Brian Haley281.68%45.13%
Jonathan T. Leighton251.50%11.28%
Mitsuru Kanda241.44%11.28%
Erich E. Hoover160.96%11.28%
Julian Anastasov140.84%11.28%
Lorenzo Colitti140.84%22.56%
Yang Hongyang130.78%11.28%
Jiri Pirko120.72%11.28%
Soheil Hassas Yeganeh110.66%22.56%
Arnaud Ebalard100.60%11.28%
Noriaki Takamiya100.60%11.28%
Alexey Dobriyan80.48%22.56%
Alexander Potapenko80.48%11.28%
Steffen Hurrle70.42%11.28%
Arnaldo Carvalho de Melo60.36%33.85%
Venkat Yekkirala60.36%11.28%
Pavel Emelyanov50.30%11.28%
Wang Chen40.24%11.28%
Ian Morris30.18%11.28%
Andi Kleen20.12%11.28%
Maciej Żenczykowski20.12%11.28%
Suresh Krishnan10.06%11.28%
Joe Perches10.06%11.28%
Stephen Hemminger10.06%11.28%
Thomas Graf10.06%11.28%
Tom Parkin10.06%11.28%
Ville Nuorvala10.06%11.28%
Total1671100.00%78100.00%


void udpv6_destroy_sock(struct sock *sk) { struct udp_sock *up = udp_sk(sk); lock_sock(sk); udp_v6_flush_pending_frames(sk); release_sock(sk); if (static_key_false(&udpv6_encap_needed) && up->encap_type) { void (*encap_destroy)(struct sock *sk); encap_destroy = ACCESS_ONCE(up->encap_destroy); if (encap_destroy) encap_destroy(sk); } inet6_destroy_sock(sk); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Parkin5464.29%133.33%
Kazunori Miyazawa2934.52%133.33%
Brian Haley11.19%133.33%
Total84100.00%3100.00%

/* * Socket option code for UDP */
int udpv6_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { if (level == SOL_UDP || level == SOL_UDPLITE) return udp_lib_setsockopt(sk, level, optname, optval, optlen, udp_v6_push_pending_frames); return ipv6_setsockopt(sk, level, optname, optval, optlen); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Mishin2944.62%114.29%
Kazunori Miyazawa2436.92%114.29%
David S. Miller710.77%228.57%
Gerrit Renker46.15%228.57%
Al Viro11.54%114.29%
Total65100.00%7100.00%

#ifdef CONFIG_COMPAT
int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { if (level == SOL_UDP || level == SOL_UDPLITE) return udp_lib_setsockopt(sk, level, optname, optval, optlen, udp_v6_push_pending_frames); return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Mishin3655.38%112.50%
Kazunori Miyazawa1421.54%112.50%
David S. Miller710.77%225.00%
Gerrit Renker46.15%225.00%
Linus Torvalds (pre-git)46.15%225.00%
Total65100.00%8100.00%

#endif
int udpv6_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { if (level == SOL_UDP || level == SOL_UDPLITE) return udp_lib_getsockopt(sk, level, optname, optval, optlen); return ipv6_getsockopt(sk, level, optname, optval, optlen); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Mishin5687.50%125.00%
David S. Miller69.38%125.00%
Gerrit Renker23.12%250.00%
Total64100.00%4100.00%

#ifdef CONFIG_COMPAT
int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { if (level == SOL_UDP || level == SOL_UDPLITE) return udp_lib_getsockopt(sk, level, optname, optval, optlen); return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Mishin5687.50%125.00%
David S. Miller69.38%125.00%
Gerrit Renker23.12%250.00%
Total64100.00%4100.00%

#endif static const struct inet6_protocol udpv6_protocol = { .handler = udpv6_rcv, .err_handler = udpv6_err, .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, }; /* ------------------------------------------------------------------------ */ #ifdef CONFIG_PROC_FS
int udp6_seq_show(struct seq_file *seq, void *v) { if (v == SEQ_START_TOKEN) { seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); } else { int bucket = ((struct udp_iter_state *)seq->private)->bucket; struct inet_sock *inet = inet_sk(v); __u16 srcp = ntohs(inet->inet_sport); __u16 destp = ntohs(inet->inet_dport); ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti4952.13%116.67%
Linus Torvalds (pre-git)2728.72%233.33%
David S. Miller1111.70%233.33%
Hideaki Yoshifuji / 吉藤英明77.45%116.67%
Total94100.00%6100.00%

static const struct file_operations udp6_afinfo_seq_fops = { .owner = THIS_MODULE, .open = udp_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net }; static struct udp_seq_afinfo udp6_seq_afinfo = { .name = "udp6", .family = AF_INET6, .udp_table = &udp_table, .seq_fops = &udp6_afinfo_seq_fops, .seq_ops = { .show = udp6_seq_show, }, };
int __net_init udp6_proc_init(struct net *net) { return udp_proc_register(net, &udp6_seq_afinfo); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明1050.00%120.00%
Daniel Lezcano630.00%120.00%
Linus Torvalds (pre-git)315.00%240.00%
Alexey Dobriyan15.00%120.00%
Total20100.00%5100.00%


void udp6_proc_exit(struct net *net) { udp_proc_unregister(net, &udp6_seq_afinfo); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明738.89%125.00%
Daniel Lezcano633.33%125.00%
Linus Torvalds (pre-git)527.78%250.00%
Total18100.00%4100.00%

#endif /* CONFIG_PROC_FS */ /* ------------------------------------------------------------------------ */ struct proto udpv6_prot = { .name = "UDPv6", .owner = THIS_MODULE, .close = udp_lib_close, .connect = ip6_datagram_connect, .disconnect = udp_disconnect, .ioctl = udp_ioctl, .init = udp_init_sock, .destroy = udpv6_destroy_sock, .setsockopt = udpv6_setsockopt, .getsockopt = udpv6_getsockopt, .sendmsg = udpv6_sendmsg, .recvmsg = udpv6_recvmsg, .release_cb = ip6_datagram_release_cb, .hash = udp_lib_hash, .unhash = udp_lib_unhash, .rehash = udp_v6_rehash, .get_port = udp_v6_get_port, .memory_allocated = &udp_memory_allocated, .sysctl_mem = sysctl_udp_mem, .sysctl_wmem = &sysctl_udp_wmem_min, .sysctl_rmem = &sysctl_udp_rmem_min, .obj_size = sizeof(struct udp6_sock), .h.udp_table = &udp_table, #ifdef CONFIG_COMPAT .compat_setsockopt = compat_udpv6_setsockopt, .compat_getsockopt = compat_udpv6_getsockopt, #endif .diag_destroy = udp_abort, }; static struct inet_protosw udpv6_protosw = { .type = SOCK_DGRAM, .protocol = IPPROTO_UDP, .prot = &udpv6_prot, .ops = &inet6_dgram_ops, .flags = INET_PROTOSW_PERMANENT, };
int __init udpv6_init(void) { int ret; ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); if (ret) goto out; ret = inet6_register_protosw(&udpv6_protosw); if (ret) goto out_udpv6_protocol; out: return ret; out_udpv6_protocol: inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano4370.49%120.00%
Linus Torvalds (pre-git)1219.67%240.00%
David S. Miller58.20%120.00%
Vlad Yasevich11.64%120.00%
Total61100.00%5100.00%


void udpv6_exit(void) { inet6_unregister_protosw(&udpv6_protosw); inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano1571.43%133.33%
Linus Torvalds523.81%133.33%
Linus Torvalds (pre-git)14.76%133.33%
Total21100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)122316.28%2910.00%
Eric Dumazet115315.35%3813.10%
Kazunori Miyazawa5877.81%31.03%
Hideaki Yoshifuji / 吉藤英明4526.02%237.93%
Tom Herbert3785.03%72.41%
Gerrit Renker3184.23%31.03%
David S. Miller3164.21%217.24%
Vlad Yasevich2633.50%31.03%
Benjamin LaHaise2513.34%31.03%
Sridhar Samudrala2102.80%10.34%
Hannes Frederic Sowa2042.72%93.10%
Dmitry Mishin1872.49%10.34%
David Held1652.20%20.69%
Linus Torvalds1421.89%31.03%
Herbert Xu1161.54%103.45%
Wei Wang921.22%20.69%
Arnaldo Carvalho de Melo891.18%144.83%
Robert Shearman771.03%10.34%
KOVACS Krisztian771.03%20.69%
Daniel Lezcano740.99%31.03%
Pavel Emelyanov680.91%93.10%
Craig Gallek670.89%41.38%
Brian Haley640.85%93.10%
Lorenzo Colitti630.84%31.03%
Balazs Scheidler560.75%20.69%
Tom Parkin550.73%20.69%
Wei Yongjun540.72%20.69%
samanthakumar470.63%20.69%
Rusty Russell400.53%10.34%
Hideo Aoki390.52%10.34%
Arjan van de Ven350.47%10.34%
Duan Jiong320.43%31.03%
Wang Chen290.39%20.69%
Xuemin Su260.35%10.34%
Joe Perches260.35%20.69%
Denis V. Lunev260.35%31.03%
Jonathan T. Leighton250.33%10.34%
Mitsuru Kanda240.32%10.34%
Alexey Dobriyan230.31%51.72%
Henning Rogge220.29%10.34%
Björn Mork200.27%10.34%
Tom Lendacky180.24%20.69%
Rick Jones170.23%10.34%
Paolo Abeni160.21%31.03%
Erich E. Hoover160.21%10.34%
Julian Anastasov140.19%10.34%
Steffen Hurrle130.17%10.34%
Ian Morris130.17%31.03%
Yang Hongyang130.17%10.34%
Jiri Pirko120.16%10.34%
Soheil Hassas Yeganeh110.15%20.69%
Michal Kubeček100.13%10.34%
Daniel Borkmann100.13%20.69%
Arnaud Ebalard100.13%10.34%
Noriaki Takamiya100.13%10.34%
Samuel Thibault90.12%10.34%
Shawn Bohrer90.12%10.34%
Sven Wegener90.12%10.34%
Alexander Potapenko80.11%10.34%
Al Viro80.11%72.41%
Alexander Duyck70.09%10.34%
Xufeng Zhang70.09%10.34%
Eliezer Tamir70.09%20.69%
Arnd Bergmann60.08%10.34%
Pablo Neira Ayuso60.08%10.34%
Venkat Yekkirala60.08%10.34%
Stephen Hemminger50.07%20.69%
Martin KaFai Lau50.07%10.34%
David Ahern30.04%10.34%
Tejun Heo30.04%10.34%
Octavian Purdila20.03%10.34%
David L Stevens20.03%10.34%
Maciej Żenczykowski20.03%10.34%
Andi Kleen20.03%10.34%
Ville Nuorvala10.01%10.34%
Vladislav Yasevich10.01%10.34%
Jorge Boncompte10.01%10.34%
Adrian Bunk10.01%10.34%
Bill Sommerfeld10.01%10.34%
Thomas Graf10.01%10.34%
Neil Horman10.01%10.34%
Suresh Krishnan10.01%10.34%
Total7512100.00%290100.00%
Directory: net/ipv6
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