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Release 4.14 net/ipv6/ping.c

Directory: net/ipv6
/*
 * INET         An implementation of the TCP/IP protocol suite for the LINUX
 *              operating system.  INET is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              "Ping" sockets
 *
 *              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.
 *
 * Based on ipv4/ping.c code.
 *
 * Authors:     Lorenzo Colitti (IPv6 support)
 *              Vasiliy Kulikov / Openwall (IPv4 implementation, for Linux 2.6),
 *              Pavel Kankovsky (IPv4 implementation, for Linux 2.4.32)
 *
 */

#include <net/addrconf.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <net/protocol.h>
#include <net/udp.h>
#include <net/transp_v6.h>
#include <net/ping.h>

/* Compatibility glue so we can support IPv6 when it's compiled as a module */

static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) { return -EAFNOSUPPORT; }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti2281.48%133.33%
Hannes Frederic Sowa414.81%133.33%
Fengguang Wu13.70%133.33%
Total27100.00%3100.00%


static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) { }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti1785.00%133.33%
Hannes Frederic Sowa210.00%133.33%
Fengguang Wu15.00%133.33%
Total20100.00%3100.00%


static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err) { return -EAFNOSUPPORT; }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti1995.00%150.00%
Fengguang Wu15.00%150.00%
Total20100.00%2100.00%


static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, u32 info, u8 *payload) {}

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti2796.43%150.00%
Fengguang Wu13.57%150.00%
Total28100.00%2100.00%


static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr, const struct net_device *dev, int strict) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti2793.10%133.33%
David S. Miller13.45%133.33%
Fengguang Wu13.45%133.33%
Total29100.00%3100.00%


static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk); struct icmp6hdr user_icmph; int addr_type; struct in6_addr *daddr; int oif = 0; struct flowi6 fl6; int err; struct dst_entry *dst; struct rt6_info *rt; struct pingfakehdr pfh; struct sockcm_cookie junk = {0}; struct ipcm6_cookie ipc6; pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num); err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph, sizeof(user_icmph)); if (err) return err; if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name); if (msg->msg_namelen < sizeof(*u)) return -EINVAL; if (u->sin6_family != AF_INET6) { return -EAFNOSUPPORT; } daddr = &(u->sin6_addr); if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr))) oif = u->sin6_scope_id; } else { if (sk->sk_state != TCP_ESTABLISHED) return -EDESTADDRREQ; daddr = &sk->sk_v6_daddr; } if (!oif) oif = sk->sk_bound_dev_if; if (!oif) oif = np->sticky_pktinfo.ipi6_ifindex; if (!oif && ipv6_addr_is_multicast(daddr)) oif = np->mcast_oif; else if (!oif) oif = np->ucast_oif; addr_type = ipv6_addr_type(daddr); if ((__ipv6_addr_needs_scope_id(addr_type) && !oif) || (addr_type & IPV6_ADDR_MAPPED) || (oif && sk->sk_bound_dev_if && oif != sk->sk_bound_dev_if)) return -EINVAL; /* TODO: use ip6_datagram_send_ctl to get options from cmsg */ memset(&fl6, 0, sizeof(fl6)); fl6.flowi6_proto = IPPROTO_ICMPV6; fl6.saddr = np->saddr; fl6.daddr = *daddr; fl6.flowi6_oif = oif; fl6.flowi6_mark = sk->sk_mark; fl6.flowi6_uid = sk->sk_uid; fl6.fl6_icmp_type = user_icmph.icmp6_type; fl6.fl6_icmp_code = user_icmph.icmp6_code; security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); ipc6.tclass = np->tclass; fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr); if (IS_ERR(dst)) return PTR_ERR(dst); rt = (struct rt6_info *) dst; if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) fl6.flowi6_oif = np->mcast_oif; else if (!fl6.flowi6_oif) fl6.flowi6_oif = np->ucast_oif; pfh.icmph.type = user_icmph.icmp6_type; pfh.icmph.code = user_icmph.icmp6_code; pfh.icmph.checksum = 0; pfh.icmph.un.echo.id = inet->inet_sport; pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence; pfh.msg = msg; pfh.wcheck = 0; pfh.family = AF_INET6; ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); ipc6.dontfrag = np->dontfrag; ipc6.opt = NULL; lock_sock(sk); err = ip6_append_data(sk, ping_getfrag, &pfh, len, 0, &ipc6, &fl6, rt, MSG_DONTWAIT, &junk); if (err) { ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev, ICMP6_MIB_OUTERRORS); ip6_flush_pending_frames(sk); } else { err = icmpv6_push_pending_frames(sk, &fl6, (struct icmp6hdr *) &pfh.icmph, len); } release_sock(sk); dst_release(dst); if (err) return err; return len; }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti63389.79%847.06%
Hannes Frederic Sowa243.40%211.76%
Wei Wang223.12%15.88%
Soheil Hassas Yeganeh101.42%15.88%
Steffen Hurrle70.99%15.88%
Dave Jones50.71%15.88%
Eric Dumazet20.28%15.88%
Al Viro10.14%15.88%
Haishuang Yan10.14%15.88%
Total705100.00%17100.00%

struct proto pingv6_prot = { .name = "PINGv6", .owner = THIS_MODULE, .init = ping_init_sock, .close = ping_close, .connect = ip6_datagram_connect_v6_only, .disconnect = __udp_disconnect, .setsockopt = ipv6_setsockopt, .getsockopt = ipv6_getsockopt, .sendmsg = ping_v6_sendmsg, .recvmsg = ping_recvmsg, .bind = ping_bind, .backlog_rcv = ping_queue_rcv_skb, .hash = ping_hash, .unhash = ping_unhash, .get_port = ping_get_port, .obj_size = sizeof(struct raw6_sock), }; EXPORT_SYMBOL_GPL(pingv6_prot); static struct inet_protosw pingv6_protosw = { .type = SOCK_DGRAM, .protocol = IPPROTO_ICMPV6, .prot = &pingv6_prot, .ops = &inet6_sockraw_ops, .flags = INET_PROTOSW_REUSE, }; #ifdef CONFIG_PROC_FS
static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos) { return ping_seq_start(seq, pos, AF_INET6); }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti26100.00%1100.00%
Total26100.00%1100.00%


static int ping_v6_seq_show(struct seq_file *seq, void *v) { if (v == SEQ_START_TOKEN) { seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); } else { int bucket = ((struct ping_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 Colitti9498.95%150.00%
Fengguang Wu11.05%150.00%
Total95100.00%2100.00%

static struct ping_seq_afinfo ping_v6_seq_afinfo = { .name = "icmp6", .family = AF_INET6, .seq_fops = &ping_seq_fops, .seq_ops = { .start = ping_v6_seq_start, .show = ping_v6_seq_show, .next = ping_seq_next, .stop = ping_seq_stop, }, };
static int __net_init ping_v6_proc_init_net(struct net *net) { return ping_proc_register(net, &ping_v6_seq_afinfo); }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti21100.00%1100.00%
Total21100.00%1100.00%


static void __net_init ping_v6_proc_exit_net(struct net *net) { return ping_proc_unregister(net, &ping_v6_seq_afinfo); }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti21100.00%1100.00%
Total21100.00%1100.00%

static struct pernet_operations ping_v6_net_ops = { .init = ping_v6_proc_init_net, .exit = ping_v6_proc_exit_net, }; #endif
int __init pingv6_init(void) { #ifdef CONFIG_PROC_FS int ret = register_pernet_subsys(&ping_v6_net_ops); if (ret) return ret; #endif pingv6_ops.ipv6_recv_error = ipv6_recv_error; pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl; pingv6_ops.ip6_datagram_recv_specific_ctl = ip6_datagram_recv_specific_ctl; pingv6_ops.icmpv6_err_convert = icmpv6_err_convert; pingv6_ops.ipv6_icmp_error = ipv6_icmp_error; pingv6_ops.ipv6_chk_addr = ipv6_chk_addr; return inet6_register_protosw(&pingv6_protosw); }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti6488.89%150.00%
Hannes Frederic Sowa811.11%150.00%
Total72100.00%2100.00%

/* This never gets called because it's not possible to unload the ipv6 module, * but just in case. */
void pingv6_exit(void) { pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error; pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl; pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl; pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert; pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error; pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr; #ifdef CONFIG_PROC_FS unregister_pernet_subsys(&ping_v6_net_ops); #endif inet6_unregister_protosw(&pingv6_protosw); }

Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti5388.33%150.00%
Hannes Frederic Sowa711.67%150.00%
Total60100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Lorenzo Colitti111883.00%937.50%
Haishuang Yan1289.50%14.17%
Hannes Frederic Sowa453.34%416.67%
Wei Wang221.63%14.17%
Soheil Hassas Yeganeh100.74%14.17%
Steffen Hurrle70.52%14.17%
Fengguang Wu60.45%14.17%
Dave Jones50.37%14.17%
Eric Dumazet40.30%312.50%
David S. Miller10.07%14.17%
Al Viro10.07%14.17%
Total1347100.00%24100.00%
Directory: net/ipv6
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