| 1 |
1275 |
phoenix |
/*
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| 2 |
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* PF_INET6 socket protocol family
|
| 3 |
|
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* Linux INET6 implementation
|
| 4 |
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*
|
| 5 |
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* Authors:
|
| 6 |
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* Pedro Roque <roque@di.fc.ul.pt>
|
| 7 |
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*
|
| 8 |
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* Adapted from linux/net/ipv4/af_inet.c
|
| 9 |
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*
|
| 10 |
|
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* $Id: af_inet6.c,v 1.1.1.1 2004-04-15 01:14:39 phoenix Exp $
|
| 11 |
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*
|
| 12 |
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* Fixes:
|
| 13 |
|
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* piggy, Karl Knutson : Socket protocol table
|
| 14 |
|
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* Hideaki YOSHIFUJI : sin6_scope_id support
|
| 15 |
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* Arnaldo Melo : check proc_net_create return, cleanups
|
| 16 |
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*
|
| 17 |
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* This program is free software; you can redistribute it and/or
|
| 18 |
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* modify it under the terms of the GNU General Public License
|
| 19 |
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* as published by the Free Software Foundation; either version
|
| 20 |
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* 2 of the License, or (at your option) any later version.
|
| 21 |
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*/
|
| 22 |
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| 23 |
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| 24 |
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#include <linux/module.h>
|
| 25 |
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#include <linux/config.h>
|
| 26 |
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#include <linux/errno.h>
|
| 27 |
|
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#include <linux/types.h>
|
| 28 |
|
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#include <linux/socket.h>
|
| 29 |
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#include <linux/in.h>
|
| 30 |
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#include <linux/kernel.h>
|
| 31 |
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#include <linux/major.h>
|
| 32 |
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#include <linux/sched.h>
|
| 33 |
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#include <linux/timer.h>
|
| 34 |
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#include <linux/string.h>
|
| 35 |
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#include <linux/sockios.h>
|
| 36 |
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#include <linux/net.h>
|
| 37 |
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#include <linux/fcntl.h>
|
| 38 |
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#include <linux/mm.h>
|
| 39 |
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#include <linux/interrupt.h>
|
| 40 |
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#include <linux/proc_fs.h>
|
| 41 |
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#include <linux/stat.h>
|
| 42 |
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#include <linux/init.h>
|
| 43 |
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#include <linux/version.h>
|
| 44 |
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| 45 |
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#include <linux/inet.h>
|
| 46 |
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#include <linux/netdevice.h>
|
| 47 |
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#include <linux/icmpv6.h>
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| 48 |
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#include <linux/brlock.h>
|
| 49 |
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#include <linux/smp_lock.h>
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| 50 |
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| 51 |
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#include <net/ip.h>
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| 52 |
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#include <net/ipv6.h>
|
| 53 |
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#include <net/udp.h>
|
| 54 |
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#include <net/tcp.h>
|
| 55 |
|
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#include <net/ipip.h>
|
| 56 |
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#include <net/protocol.h>
|
| 57 |
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#include <net/inet_common.h>
|
| 58 |
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#include <net/transp_v6.h>
|
| 59 |
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#include <net/ip6_route.h>
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| 60 |
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#include <net/addrconf.h>
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| 61 |
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| 62 |
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#include <asm/uaccess.h>
|
| 63 |
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#include <asm/system.h>
|
| 64 |
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|
| 65 |
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#ifdef MODULE
|
| 66 |
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static int unloadable = 0; /* XX: Turn to one when all is ok within the
|
| 67 |
|
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module for allowing unload */
|
| 68 |
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#endif
|
| 69 |
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|
| 70 |
|
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#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
|
| 71 |
|
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MODULE_AUTHOR("Cast of dozens");
|
| 72 |
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MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
|
| 73 |
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MODULE_PARM(unloadable, "i");
|
| 74 |
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#endif
|
| 75 |
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|
| 76 |
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/* IPv6 procfs goodies... */
|
| 77 |
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|
| 78 |
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#ifdef CONFIG_PROC_FS
|
| 79 |
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extern int anycast6_get_info(char *, char **, off_t, int);
|
| 80 |
|
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extern int raw6_get_info(char *, char **, off_t, int);
|
| 81 |
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extern int tcp6_get_info(char *, char **, off_t, int);
|
| 82 |
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extern int udp6_get_info(char *, char **, off_t, int);
|
| 83 |
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extern int afinet6_get_info(char *, char **, off_t, int);
|
| 84 |
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extern int afinet6_get_snmp(char *, char **, off_t, int);
|
| 85 |
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#endif
|
| 86 |
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|
| 87 |
|
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#ifdef CONFIG_SYSCTL
|
| 88 |
|
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extern void ipv6_sysctl_register(void);
|
| 89 |
|
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extern void ipv6_sysctl_unregister(void);
|
| 90 |
|
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#endif
|
| 91 |
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|
| 92 |
|
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int sysctl_ipv6_bindv6only;
|
| 93 |
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|
| 94 |
|
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#ifdef INET_REFCNT_DEBUG
|
| 95 |
|
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atomic_t inet6_sock_nr;
|
| 96 |
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#endif
|
| 97 |
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|
| 98 |
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/* The inetsw table contains everything that inet_create needs to
|
| 99 |
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* build a new socket.
|
| 100 |
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*/
|
| 101 |
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struct list_head inetsw6[SOCK_MAX];
|
| 102 |
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|
| 103 |
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static void inet6_sock_destruct(struct sock *sk)
|
| 104 |
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{
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| 105 |
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inet_sock_destruct(sk);
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| 106 |
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| 107 |
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#ifdef INET_REFCNT_DEBUG
|
| 108 |
|
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atomic_dec(&inet6_sock_nr);
|
| 109 |
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#endif
|
| 110 |
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MOD_DEC_USE_COUNT;
|
| 111 |
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}
|
| 112 |
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|
| 113 |
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static int inet6_create(struct socket *sock, int protocol)
|
| 114 |
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{
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| 115 |
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struct sock *sk;
|
| 116 |
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struct list_head *p;
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| 117 |
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struct inet_protosw *answer;
|
| 118 |
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|
| 119 |
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sk = sk_alloc(PF_INET6, GFP_KERNEL, 1);
|
| 120 |
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if (sk == NULL)
|
| 121 |
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goto do_oom;
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| 122 |
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|
| 123 |
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/* Look for the requested type/protocol pair. */
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| 124 |
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answer = NULL;
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| 125 |
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br_read_lock_bh(BR_NETPROTO_LOCK);
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| 126 |
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list_for_each(p, &inetsw6[sock->type]) {
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| 127 |
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answer = list_entry(p, struct inet_protosw, list);
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| 128 |
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|
| 129 |
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/* Check the non-wild match. */
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| 130 |
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if (protocol == answer->protocol) {
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| 131 |
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if (protocol != IPPROTO_IP)
|
| 132 |
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break;
|
| 133 |
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} else {
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| 134 |
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/* Check for the two wild cases. */
|
| 135 |
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if (IPPROTO_IP == protocol) {
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| 136 |
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protocol = answer->protocol;
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| 137 |
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break;
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| 138 |
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}
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| 139 |
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if (IPPROTO_IP == answer->protocol)
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| 140 |
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break;
|
| 141 |
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}
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| 142 |
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answer = NULL;
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| 143 |
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}
|
| 144 |
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br_read_unlock_bh(BR_NETPROTO_LOCK);
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| 145 |
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| 146 |
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if (!answer)
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| 147 |
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goto free_and_badtype;
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| 148 |
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if (answer->capability > 0 && !capable(answer->capability))
|
| 149 |
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goto free_and_badperm;
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| 150 |
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if (!protocol)
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| 151 |
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goto free_and_noproto;
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| 152 |
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| 153 |
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sock->ops = answer->ops;
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| 154 |
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sock_init_data(sock, sk);
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| 155 |
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| 156 |
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sk->prot = answer->prot;
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| 157 |
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sk->no_check = answer->no_check;
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| 158 |
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if (INET_PROTOSW_REUSE & answer->flags)
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| 159 |
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sk->reuse = 1;
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| 160 |
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| 161 |
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if (SOCK_RAW == sock->type) {
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| 162 |
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sk->num = protocol;
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| 163 |
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if (IPPROTO_RAW == protocol)
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| 164 |
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sk->protinfo.af_inet.hdrincl = 1;
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| 165 |
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}
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| 166 |
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| 167 |
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sk->destruct = inet6_sock_destruct;
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| 168 |
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sk->zapped = 0;
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| 169 |
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sk->family = PF_INET6;
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| 170 |
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sk->protocol = protocol;
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| 171 |
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| 172 |
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sk->backlog_rcv = answer->prot->backlog_rcv;
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| 173 |
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| 174 |
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sk->net_pinfo.af_inet6.hop_limit = -1;
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| 175 |
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sk->net_pinfo.af_inet6.mcast_hops = -1;
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| 176 |
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sk->net_pinfo.af_inet6.mc_loop = 1;
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| 177 |
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sk->net_pinfo.af_inet6.pmtudisc = IPV6_PMTUDISC_WANT;
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| 178 |
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| 179 |
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sk->net_pinfo.af_inet6.ipv6only = sysctl_ipv6_bindv6only;
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| 180 |
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| 181 |
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/* Init the ipv4 part of the socket since we can have sockets
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| 182 |
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* using v6 API for ipv4.
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| 183 |
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*/
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| 184 |
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sk->protinfo.af_inet.ttl = 64;
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| 185 |
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| 186 |
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sk->protinfo.af_inet.mc_loop = 1;
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| 187 |
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sk->protinfo.af_inet.mc_ttl = 1;
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| 188 |
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sk->protinfo.af_inet.mc_index = 0;
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| 189 |
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sk->protinfo.af_inet.mc_list = NULL;
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| 190 |
|
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|
| 191 |
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if (ipv4_config.no_pmtu_disc)
|
| 192 |
|
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sk->protinfo.af_inet.pmtudisc = IP_PMTUDISC_DONT;
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| 193 |
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else
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| 194 |
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sk->protinfo.af_inet.pmtudisc = IP_PMTUDISC_WANT;
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| 195 |
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|
| 196 |
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| 197 |
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#ifdef INET_REFCNT_DEBUG
|
| 198 |
|
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atomic_inc(&inet6_sock_nr);
|
| 199 |
|
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atomic_inc(&inet_sock_nr);
|
| 200 |
|
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#endif
|
| 201 |
|
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MOD_INC_USE_COUNT;
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| 202 |
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|
| 203 |
|
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if (sk->num) {
|
| 204 |
|
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/* It assumes that any protocol which allows
|
| 205 |
|
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* the user to assign a number at socket
|
| 206 |
|
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* creation time automatically shares.
|
| 207 |
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*/
|
| 208 |
|
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sk->sport = ntohs(sk->num);
|
| 209 |
|
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sk->prot->hash(sk);
|
| 210 |
|
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}
|
| 211 |
|
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if (sk->prot->init) {
|
| 212 |
|
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int err = sk->prot->init(sk);
|
| 213 |
|
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if (err != 0) {
|
| 214 |
|
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MOD_DEC_USE_COUNT;
|
| 215 |
|
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inet_sock_release(sk);
|
| 216 |
|
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return err;
|
| 217 |
|
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}
|
| 218 |
|
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}
|
| 219 |
|
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return 0;
|
| 220 |
|
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|
| 221 |
|
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free_and_badtype:
|
| 222 |
|
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sk_free(sk);
|
| 223 |
|
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return -ESOCKTNOSUPPORT;
|
| 224 |
|
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free_and_badperm:
|
| 225 |
|
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sk_free(sk);
|
| 226 |
|
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return -EPERM;
|
| 227 |
|
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free_and_noproto:
|
| 228 |
|
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sk_free(sk);
|
| 229 |
|
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return -EPROTONOSUPPORT;
|
| 230 |
|
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do_oom:
|
| 231 |
|
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return -ENOBUFS;
|
| 232 |
|
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}
|
| 233 |
|
|
|
| 234 |
|
|
|
| 235 |
|
|
/* bind for INET6 API */
|
| 236 |
|
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int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
|
| 237 |
|
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{
|
| 238 |
|
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struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
|
| 239 |
|
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struct sock *sk = sock->sk;
|
| 240 |
|
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__u32 v4addr = 0;
|
| 241 |
|
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unsigned short snum;
|
| 242 |
|
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int addr_type = 0;
|
| 243 |
|
|
|
| 244 |
|
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/* If the socket has its own bind function then use it. */
|
| 245 |
|
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if(sk->prot->bind)
|
| 246 |
|
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return sk->prot->bind(sk, uaddr, addr_len);
|
| 247 |
|
|
|
| 248 |
|
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if (addr_len < SIN6_LEN_RFC2133)
|
| 249 |
|
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return -EINVAL;
|
| 250 |
|
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addr_type = ipv6_addr_type(&addr->sin6_addr);
|
| 251 |
|
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if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
|
| 252 |
|
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return -EINVAL;
|
| 253 |
|
|
|
| 254 |
|
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/* Check if the address belongs to the host. */
|
| 255 |
|
|
if (addr_type == IPV6_ADDR_MAPPED) {
|
| 256 |
|
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v4addr = addr->sin6_addr.s6_addr32[3];
|
| 257 |
|
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if (inet_addr_type(v4addr) != RTN_LOCAL)
|
| 258 |
|
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return -EADDRNOTAVAIL;
|
| 259 |
|
|
} else {
|
| 260 |
|
|
if (addr_type != IPV6_ADDR_ANY) {
|
| 261 |
|
|
/* ipv4 addr of the socket is invalid. Only the
|
| 262 |
|
|
* unspecified and mapped address have a v4 equivalent.
|
| 263 |
|
|
*/
|
| 264 |
|
|
v4addr = LOOPBACK4_IPV6;
|
| 265 |
|
|
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
|
| 266 |
|
|
if (!ipv6_chk_addr(&addr->sin6_addr, NULL))
|
| 267 |
|
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return -EADDRNOTAVAIL;
|
| 268 |
|
|
}
|
| 269 |
|
|
}
|
| 270 |
|
|
}
|
| 271 |
|
|
|
| 272 |
|
|
snum = ntohs(addr->sin6_port);
|
| 273 |
|
|
if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
|
| 274 |
|
|
return -EACCES;
|
| 275 |
|
|
|
| 276 |
|
|
lock_sock(sk);
|
| 277 |
|
|
|
| 278 |
|
|
/* Check these errors (active socket, double bind). */
|
| 279 |
|
|
if ((sk->state != TCP_CLOSE) ||
|
| 280 |
|
|
(sk->num != 0)) {
|
| 281 |
|
|
release_sock(sk);
|
| 282 |
|
|
return -EINVAL;
|
| 283 |
|
|
}
|
| 284 |
|
|
|
| 285 |
|
|
if (addr_type & IPV6_ADDR_LINKLOCAL) {
|
| 286 |
|
|
if (addr_len >= sizeof(struct sockaddr_in6) &&
|
| 287 |
|
|
addr->sin6_scope_id) {
|
| 288 |
|
|
/* Override any existing binding, if another one
|
| 289 |
|
|
* is supplied by user.
|
| 290 |
|
|
*/
|
| 291 |
|
|
sk->bound_dev_if = addr->sin6_scope_id;
|
| 292 |
|
|
}
|
| 293 |
|
|
|
| 294 |
|
|
/* Binding to link-local address requires an interface */
|
| 295 |
|
|
if (sk->bound_dev_if == 0) {
|
| 296 |
|
|
release_sock(sk);
|
| 297 |
|
|
return -EINVAL;
|
| 298 |
|
|
}
|
| 299 |
|
|
}
|
| 300 |
|
|
|
| 301 |
|
|
sk->rcv_saddr = v4addr;
|
| 302 |
|
|
sk->saddr = v4addr;
|
| 303 |
|
|
|
| 304 |
|
|
ipv6_addr_copy(&sk->net_pinfo.af_inet6.rcv_saddr, &addr->sin6_addr);
|
| 305 |
|
|
|
| 306 |
|
|
if (!(addr_type & IPV6_ADDR_MULTICAST))
|
| 307 |
|
|
ipv6_addr_copy(&sk->net_pinfo.af_inet6.saddr, &addr->sin6_addr);
|
| 308 |
|
|
|
| 309 |
|
|
/* Make sure we are allowed to bind here. */
|
| 310 |
|
|
if (sk->prot->get_port(sk, snum) != 0) {
|
| 311 |
|
|
sk->rcv_saddr = 0;
|
| 312 |
|
|
sk->saddr = 0;
|
| 313 |
|
|
memset(&sk->net_pinfo.af_inet6.rcv_saddr, 0, sizeof(struct in6_addr));
|
| 314 |
|
|
memset(&sk->net_pinfo.af_inet6.saddr, 0, sizeof(struct in6_addr));
|
| 315 |
|
|
|
| 316 |
|
|
release_sock(sk);
|
| 317 |
|
|
return -EADDRINUSE;
|
| 318 |
|
|
}
|
| 319 |
|
|
|
| 320 |
|
|
if (addr_type != IPV6_ADDR_ANY)
|
| 321 |
|
|
sk->userlocks |= SOCK_BINDADDR_LOCK;
|
| 322 |
|
|
if (snum)
|
| 323 |
|
|
sk->userlocks |= SOCK_BINDPORT_LOCK;
|
| 324 |
|
|
sk->sport = ntohs(sk->num);
|
| 325 |
|
|
sk->dport = 0;
|
| 326 |
|
|
sk->daddr = 0;
|
| 327 |
|
|
release_sock(sk);
|
| 328 |
|
|
|
| 329 |
|
|
return 0;
|
| 330 |
|
|
}
|
| 331 |
|
|
|
| 332 |
|
|
int inet6_release(struct socket *sock)
|
| 333 |
|
|
{
|
| 334 |
|
|
struct sock *sk = sock->sk;
|
| 335 |
|
|
|
| 336 |
|
|
if (sk == NULL)
|
| 337 |
|
|
return -EINVAL;
|
| 338 |
|
|
|
| 339 |
|
|
/* Free mc lists */
|
| 340 |
|
|
ipv6_sock_mc_close(sk);
|
| 341 |
|
|
|
| 342 |
|
|
/* Free ac lists */
|
| 343 |
|
|
ipv6_sock_ac_close(sk);
|
| 344 |
|
|
|
| 345 |
|
|
return inet_release(sock);
|
| 346 |
|
|
}
|
| 347 |
|
|
|
| 348 |
|
|
int inet6_destroy_sock(struct sock *sk)
|
| 349 |
|
|
{
|
| 350 |
|
|
struct sk_buff *skb;
|
| 351 |
|
|
struct ipv6_txoptions *opt;
|
| 352 |
|
|
|
| 353 |
|
|
/*
|
| 354 |
|
|
* Release destination entry
|
| 355 |
|
|
*/
|
| 356 |
|
|
|
| 357 |
|
|
sk_dst_reset(sk);
|
| 358 |
|
|
|
| 359 |
|
|
/* Release rx options */
|
| 360 |
|
|
|
| 361 |
|
|
if ((skb = xchg(&sk->net_pinfo.af_inet6.pktoptions, NULL)) != NULL)
|
| 362 |
|
|
kfree_skb(skb);
|
| 363 |
|
|
|
| 364 |
|
|
/* Free flowlabels */
|
| 365 |
|
|
fl6_free_socklist(sk);
|
| 366 |
|
|
|
| 367 |
|
|
/* Free tx options */
|
| 368 |
|
|
|
| 369 |
|
|
if ((opt = xchg(&sk->net_pinfo.af_inet6.opt, NULL)) != NULL)
|
| 370 |
|
|
sock_kfree_s(sk, opt, opt->tot_len);
|
| 371 |
|
|
|
| 372 |
|
|
return 0;
|
| 373 |
|
|
}
|
| 374 |
|
|
|
| 375 |
|
|
/*
|
| 376 |
|
|
* This does both peername and sockname.
|
| 377 |
|
|
*/
|
| 378 |
|
|
|
| 379 |
|
|
int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
|
| 380 |
|
|
int *uaddr_len, int peer)
|
| 381 |
|
|
{
|
| 382 |
|
|
struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
|
| 383 |
|
|
struct sock *sk = sock->sk;
|
| 384 |
|
|
|
| 385 |
|
|
sin->sin6_family = AF_INET6;
|
| 386 |
|
|
sin->sin6_flowinfo = 0;
|
| 387 |
|
|
sin->sin6_scope_id = 0;
|
| 388 |
|
|
if (peer) {
|
| 389 |
|
|
if (!sk->dport)
|
| 390 |
|
|
return -ENOTCONN;
|
| 391 |
|
|
if (((1<<sk->state)&(TCPF_CLOSE|TCPF_SYN_SENT)) && peer == 1)
|
| 392 |
|
|
return -ENOTCONN;
|
| 393 |
|
|
sin->sin6_port = sk->dport;
|
| 394 |
|
|
memcpy(&sin->sin6_addr, &sk->net_pinfo.af_inet6.daddr,
|
| 395 |
|
|
sizeof(struct in6_addr));
|
| 396 |
|
|
if (sk->net_pinfo.af_inet6.sndflow)
|
| 397 |
|
|
sin->sin6_flowinfo = sk->net_pinfo.af_inet6.flow_label;
|
| 398 |
|
|
} else {
|
| 399 |
|
|
if (ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr) == IPV6_ADDR_ANY)
|
| 400 |
|
|
memcpy(&sin->sin6_addr,
|
| 401 |
|
|
&sk->net_pinfo.af_inet6.saddr,
|
| 402 |
|
|
sizeof(struct in6_addr));
|
| 403 |
|
|
else
|
| 404 |
|
|
memcpy(&sin->sin6_addr,
|
| 405 |
|
|
&sk->net_pinfo.af_inet6.rcv_saddr,
|
| 406 |
|
|
sizeof(struct in6_addr));
|
| 407 |
|
|
|
| 408 |
|
|
sin->sin6_port = sk->sport;
|
| 409 |
|
|
}
|
| 410 |
|
|
if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
|
| 411 |
|
|
sin->sin6_scope_id = sk->bound_dev_if;
|
| 412 |
|
|
*uaddr_len = sizeof(*sin);
|
| 413 |
|
|
return(0);
|
| 414 |
|
|
}
|
| 415 |
|
|
|
| 416 |
|
|
int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
| 417 |
|
|
{
|
| 418 |
|
|
struct sock *sk = sock->sk;
|
| 419 |
|
|
int err = -EINVAL;
|
| 420 |
|
|
int pid;
|
| 421 |
|
|
|
| 422 |
|
|
switch(cmd)
|
| 423 |
|
|
{
|
| 424 |
|
|
case FIOSETOWN:
|
| 425 |
|
|
case SIOCSPGRP:
|
| 426 |
|
|
if (get_user(pid, (int *) arg))
|
| 427 |
|
|
return -EFAULT;
|
| 428 |
|
|
/* see sock_no_fcntl */
|
| 429 |
|
|
if (current->pid != pid && current->pgrp != -pid &&
|
| 430 |
|
|
!capable(CAP_NET_ADMIN))
|
| 431 |
|
|
return -EPERM;
|
| 432 |
|
|
sk->proc = pid;
|
| 433 |
|
|
return(0);
|
| 434 |
|
|
case FIOGETOWN:
|
| 435 |
|
|
case SIOCGPGRP:
|
| 436 |
|
|
return put_user(sk->proc,(int *)arg);
|
| 437 |
|
|
case SIOCGSTAMP:
|
| 438 |
|
|
if(sk->stamp.tv_sec==0)
|
| 439 |
|
|
return -ENOENT;
|
| 440 |
|
|
err = copy_to_user((void *)arg, &sk->stamp,
|
| 441 |
|
|
sizeof(struct timeval));
|
| 442 |
|
|
if (err)
|
| 443 |
|
|
return -EFAULT;
|
| 444 |
|
|
return 0;
|
| 445 |
|
|
|
| 446 |
|
|
case SIOCADDRT:
|
| 447 |
|
|
case SIOCDELRT:
|
| 448 |
|
|
|
| 449 |
|
|
return(ipv6_route_ioctl(cmd,(void *)arg));
|
| 450 |
|
|
|
| 451 |
|
|
case SIOCSIFADDR:
|
| 452 |
|
|
return addrconf_add_ifaddr((void *) arg);
|
| 453 |
|
|
case SIOCDIFADDR:
|
| 454 |
|
|
return addrconf_del_ifaddr((void *) arg);
|
| 455 |
|
|
case SIOCSIFDSTADDR:
|
| 456 |
|
|
return addrconf_set_dstaddr((void *) arg);
|
| 457 |
|
|
default:
|
| 458 |
|
|
if ((cmd >= SIOCDEVPRIVATE) &&
|
| 459 |
|
|
(cmd <= (SIOCDEVPRIVATE + 15)))
|
| 460 |
|
|
return(dev_ioctl(cmd,(void *) arg));
|
| 461 |
|
|
|
| 462 |
|
|
if(sk->prot->ioctl==0 || (err=sk->prot->ioctl(sk, cmd, arg))==-ENOIOCTLCMD)
|
| 463 |
|
|
return(dev_ioctl(cmd,(void *) arg));
|
| 464 |
|
|
return err;
|
| 465 |
|
|
}
|
| 466 |
|
|
/*NOTREACHED*/
|
| 467 |
|
|
return(0);
|
| 468 |
|
|
}
|
| 469 |
|
|
|
| 470 |
|
|
struct proto_ops inet6_stream_ops = {
|
| 471 |
|
|
family: PF_INET6,
|
| 472 |
|
|
|
| 473 |
|
|
release: inet6_release,
|
| 474 |
|
|
bind: inet6_bind,
|
| 475 |
|
|
connect: inet_stream_connect, /* ok */
|
| 476 |
|
|
socketpair: sock_no_socketpair, /* a do nothing */
|
| 477 |
|
|
accept: inet_accept, /* ok */
|
| 478 |
|
|
getname: inet6_getname,
|
| 479 |
|
|
poll: tcp_poll, /* ok */
|
| 480 |
|
|
ioctl: inet6_ioctl, /* must change */
|
| 481 |
|
|
listen: inet_listen, /* ok */
|
| 482 |
|
|
shutdown: inet_shutdown, /* ok */
|
| 483 |
|
|
setsockopt: inet_setsockopt, /* ok */
|
| 484 |
|
|
getsockopt: inet_getsockopt, /* ok */
|
| 485 |
|
|
sendmsg: inet_sendmsg, /* ok */
|
| 486 |
|
|
recvmsg: inet_recvmsg, /* ok */
|
| 487 |
|
|
mmap: sock_no_mmap,
|
| 488 |
|
|
sendpage: tcp_sendpage
|
| 489 |
|
|
};
|
| 490 |
|
|
|
| 491 |
|
|
struct proto_ops inet6_dgram_ops = {
|
| 492 |
|
|
family: PF_INET6,
|
| 493 |
|
|
|
| 494 |
|
|
release: inet6_release,
|
| 495 |
|
|
bind: inet6_bind,
|
| 496 |
|
|
connect: inet_dgram_connect, /* ok */
|
| 497 |
|
|
socketpair: sock_no_socketpair, /* a do nothing */
|
| 498 |
|
|
accept: sock_no_accept, /* a do nothing */
|
| 499 |
|
|
getname: inet6_getname,
|
| 500 |
|
|
poll: datagram_poll, /* ok */
|
| 501 |
|
|
ioctl: inet6_ioctl, /* must change */
|
| 502 |
|
|
listen: sock_no_listen, /* ok */
|
| 503 |
|
|
shutdown: inet_shutdown, /* ok */
|
| 504 |
|
|
setsockopt: inet_setsockopt, /* ok */
|
| 505 |
|
|
getsockopt: inet_getsockopt, /* ok */
|
| 506 |
|
|
sendmsg: inet_sendmsg, /* ok */
|
| 507 |
|
|
recvmsg: inet_recvmsg, /* ok */
|
| 508 |
|
|
mmap: sock_no_mmap,
|
| 509 |
|
|
sendpage: sock_no_sendpage,
|
| 510 |
|
|
};
|
| 511 |
|
|
|
| 512 |
|
|
struct net_proto_family inet6_family_ops = {
|
| 513 |
|
|
PF_INET6,
|
| 514 |
|
|
inet6_create
|
| 515 |
|
|
};
|
| 516 |
|
|
|
| 517 |
|
|
#ifdef MODULE
|
| 518 |
|
|
int ipv6_unload(void)
|
| 519 |
|
|
{
|
| 520 |
|
|
if (!unloadable) return 1;
|
| 521 |
|
|
/* We keep internally 3 raw sockets */
|
| 522 |
|
|
return atomic_read(&(__this_module.uc.usecount)) - 3;
|
| 523 |
|
|
}
|
| 524 |
|
|
#endif
|
| 525 |
|
|
|
| 526 |
|
|
#if defined(MODULE) && defined(CONFIG_SYSCTL)
|
| 527 |
|
|
extern void ipv6_sysctl_register(void);
|
| 528 |
|
|
extern void ipv6_sysctl_unregister(void);
|
| 529 |
|
|
#endif
|
| 530 |
|
|
|
| 531 |
|
|
static struct inet_protosw rawv6_protosw = {
|
| 532 |
|
|
type: SOCK_RAW,
|
| 533 |
|
|
protocol: IPPROTO_IP, /* wild card */
|
| 534 |
|
|
prot: &rawv6_prot,
|
| 535 |
|
|
ops: &inet6_dgram_ops,
|
| 536 |
|
|
capability: CAP_NET_RAW,
|
| 537 |
|
|
no_check: UDP_CSUM_DEFAULT,
|
| 538 |
|
|
flags: INET_PROTOSW_REUSE,
|
| 539 |
|
|
};
|
| 540 |
|
|
|
| 541 |
|
|
#define INETSW6_ARRAY_LEN (sizeof(inetsw6_array) / sizeof(struct inet_protosw))
|
| 542 |
|
|
|
| 543 |
|
|
void
|
| 544 |
|
|
inet6_register_protosw(struct inet_protosw *p)
|
| 545 |
|
|
{
|
| 546 |
|
|
struct list_head *lh;
|
| 547 |
|
|
struct inet_protosw *answer;
|
| 548 |
|
|
int protocol = p->protocol;
|
| 549 |
|
|
struct list_head *last_perm;
|
| 550 |
|
|
|
| 551 |
|
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
| 552 |
|
|
|
| 553 |
|
|
if (p->type > SOCK_MAX)
|
| 554 |
|
|
goto out_illegal;
|
| 555 |
|
|
|
| 556 |
|
|
/* If we are trying to override a permanent protocol, bail. */
|
| 557 |
|
|
answer = NULL;
|
| 558 |
|
|
last_perm = &inetsw6[p->type];
|
| 559 |
|
|
list_for_each(lh, &inetsw6[p->type]) {
|
| 560 |
|
|
answer = list_entry(lh, struct inet_protosw, list);
|
| 561 |
|
|
|
| 562 |
|
|
/* Check only the non-wild match. */
|
| 563 |
|
|
if (INET_PROTOSW_PERMANENT & answer->flags) {
|
| 564 |
|
|
if (protocol == answer->protocol)
|
| 565 |
|
|
break;
|
| 566 |
|
|
last_perm = lh;
|
| 567 |
|
|
}
|
| 568 |
|
|
|
| 569 |
|
|
answer = NULL;
|
| 570 |
|
|
}
|
| 571 |
|
|
if (answer)
|
| 572 |
|
|
goto out_permanent;
|
| 573 |
|
|
|
| 574 |
|
|
/* Add the new entry after the last permanent entry if any, so that
|
| 575 |
|
|
* the new entry does not override a permanent entry when matched with
|
| 576 |
|
|
* a wild-card protocol. But it is allowed to override any existing
|
| 577 |
|
|
* non-permanent entry. This means that when we remove this entry, the
|
| 578 |
|
|
* system automatically returns to the old behavior.
|
| 579 |
|
|
*/
|
| 580 |
|
|
list_add(&p->list, last_perm);
|
| 581 |
|
|
out:
|
| 582 |
|
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
| 583 |
|
|
return;
|
| 584 |
|
|
|
| 585 |
|
|
out_permanent:
|
| 586 |
|
|
printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
|
| 587 |
|
|
protocol);
|
| 588 |
|
|
goto out;
|
| 589 |
|
|
|
| 590 |
|
|
out_illegal:
|
| 591 |
|
|
printk(KERN_ERR
|
| 592 |
|
|
"Ignoring attempt to register illegal socket type %d.\n",
|
| 593 |
|
|
p->type);
|
| 594 |
|
|
goto out;
|
| 595 |
|
|
}
|
| 596 |
|
|
|
| 597 |
|
|
void
|
| 598 |
|
|
inet6_unregister_protosw(struct inet_protosw *p)
|
| 599 |
|
|
{
|
| 600 |
|
|
inet_unregister_protosw(p);
|
| 601 |
|
|
}
|
| 602 |
|
|
|
| 603 |
|
|
static int __init inet6_init(void)
|
| 604 |
|
|
{
|
| 605 |
|
|
struct sk_buff *dummy_skb;
|
| 606 |
|
|
struct list_head *r;
|
| 607 |
|
|
int err;
|
| 608 |
|
|
|
| 609 |
|
|
#ifdef MODULE
|
| 610 |
|
|
if (!mod_member_present(&__this_module, can_unload))
|
| 611 |
|
|
return -EINVAL;
|
| 612 |
|
|
|
| 613 |
|
|
__this_module.can_unload = &ipv6_unload;
|
| 614 |
|
|
#endif
|
| 615 |
|
|
|
| 616 |
|
|
printk(KERN_INFO "IPv6 v0.8 for NET4.0\n");
|
| 617 |
|
|
|
| 618 |
|
|
if (sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb))
|
| 619 |
|
|
{
|
| 620 |
|
|
printk(KERN_CRIT "inet6_proto_init: size fault\n");
|
| 621 |
|
|
return -EINVAL;
|
| 622 |
|
|
}
|
| 623 |
|
|
|
| 624 |
|
|
/* Register the socket-side information for inet6_create. */
|
| 625 |
|
|
for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
|
| 626 |
|
|
INIT_LIST_HEAD(r);
|
| 627 |
|
|
|
| 628 |
|
|
/* We MUST register RAW sockets before we create the ICMP6,
|
| 629 |
|
|
* IGMP6, or NDISC control sockets.
|
| 630 |
|
|
*/
|
| 631 |
|
|
inet6_register_protosw(&rawv6_protosw);
|
| 632 |
|
|
|
| 633 |
|
|
/*
|
| 634 |
|
|
* ipngwg API draft makes clear that the correct semantics
|
| 635 |
|
|
* for TCP and UDP is to consider one TCP and UDP instance
|
| 636 |
|
|
* in a host available by both INET and INET6 APIs and
|
| 637 |
|
|
* able to communicate via both network protocols.
|
| 638 |
|
|
*/
|
| 639 |
|
|
|
| 640 |
|
|
#if defined(MODULE) && defined(CONFIG_SYSCTL)
|
| 641 |
|
|
ipv6_sysctl_register();
|
| 642 |
|
|
#endif
|
| 643 |
|
|
err = icmpv6_init(&inet6_family_ops);
|
| 644 |
|
|
if (err)
|
| 645 |
|
|
goto icmp_fail;
|
| 646 |
|
|
err = ndisc_init(&inet6_family_ops);
|
| 647 |
|
|
if (err)
|
| 648 |
|
|
goto ndisc_fail;
|
| 649 |
|
|
err = igmp6_init(&inet6_family_ops);
|
| 650 |
|
|
if (err)
|
| 651 |
|
|
goto igmp_fail;
|
| 652 |
|
|
/* Create /proc/foo6 entries. */
|
| 653 |
|
|
#ifdef CONFIG_PROC_FS
|
| 654 |
|
|
err = -ENOMEM;
|
| 655 |
|
|
if (!proc_net_create("raw6", 0, raw6_get_info))
|
| 656 |
|
|
goto proc_raw6_fail;
|
| 657 |
|
|
if (!proc_net_create("tcp6", 0, tcp6_get_info))
|
| 658 |
|
|
goto proc_tcp6_fail;
|
| 659 |
|
|
if (!proc_net_create("udp6", 0, udp6_get_info))
|
| 660 |
|
|
goto proc_udp6_fail;
|
| 661 |
|
|
if (!proc_net_create("sockstat6", 0, afinet6_get_info))
|
| 662 |
|
|
goto proc_sockstat6_fail;
|
| 663 |
|
|
if (!proc_net_create("snmp6", 0, afinet6_get_snmp))
|
| 664 |
|
|
goto proc_snmp6_fail;
|
| 665 |
|
|
if (!proc_net_create("anycast6", 0, anycast6_get_info))
|
| 666 |
|
|
goto proc_anycast6_fail;
|
| 667 |
|
|
#endif
|
| 668 |
|
|
ipv6_netdev_notif_init();
|
| 669 |
|
|
ipv6_packet_init();
|
| 670 |
|
|
ip6_route_init();
|
| 671 |
|
|
ip6_flowlabel_init();
|
| 672 |
|
|
addrconf_init();
|
| 673 |
|
|
sit_init();
|
| 674 |
|
|
ipv6_frag_init();
|
| 675 |
|
|
|
| 676 |
|
|
/* Init v6 transport protocols. */
|
| 677 |
|
|
udpv6_init();
|
| 678 |
|
|
tcpv6_init();
|
| 679 |
|
|
|
| 680 |
|
|
/* Now the userspace is allowed to create INET6 sockets. */
|
| 681 |
|
|
(void) sock_register(&inet6_family_ops);
|
| 682 |
|
|
|
| 683 |
|
|
return 0;
|
| 684 |
|
|
|
| 685 |
|
|
#ifdef CONFIG_PROC_FS
|
| 686 |
|
|
proc_anycast6_fail:
|
| 687 |
|
|
proc_net_remove("anycast6");
|
| 688 |
|
|
proc_snmp6_fail:
|
| 689 |
|
|
proc_net_remove("sockstat6");
|
| 690 |
|
|
proc_sockstat6_fail:
|
| 691 |
|
|
proc_net_remove("udp6");
|
| 692 |
|
|
proc_udp6_fail:
|
| 693 |
|
|
proc_net_remove("tcp6");
|
| 694 |
|
|
proc_tcp6_fail:
|
| 695 |
|
|
proc_net_remove("raw6");
|
| 696 |
|
|
proc_raw6_fail:
|
| 697 |
|
|
igmp6_cleanup();
|
| 698 |
|
|
#endif
|
| 699 |
|
|
igmp_fail:
|
| 700 |
|
|
ndisc_cleanup();
|
| 701 |
|
|
ndisc_fail:
|
| 702 |
|
|
icmpv6_cleanup();
|
| 703 |
|
|
icmp_fail:
|
| 704 |
|
|
#if defined(MODULE) && defined(CONFIG_SYSCTL)
|
| 705 |
|
|
ipv6_sysctl_unregister();
|
| 706 |
|
|
#endif
|
| 707 |
|
|
return err;
|
| 708 |
|
|
}
|
| 709 |
|
|
module_init(inet6_init);
|
| 710 |
|
|
|
| 711 |
|
|
|
| 712 |
|
|
#ifdef MODULE
|
| 713 |
|
|
static void inet6_exit(void)
|
| 714 |
|
|
{
|
| 715 |
|
|
/* First of all disallow new sockets creation. */
|
| 716 |
|
|
sock_unregister(PF_INET6);
|
| 717 |
|
|
#ifdef CONFIG_PROC_FS
|
| 718 |
|
|
proc_net_remove("raw6");
|
| 719 |
|
|
proc_net_remove("tcp6");
|
| 720 |
|
|
proc_net_remove("udp6");
|
| 721 |
|
|
proc_net_remove("sockstat6");
|
| 722 |
|
|
proc_net_remove("snmp6");
|
| 723 |
|
|
proc_net_remove("anycast6");
|
| 724 |
|
|
#endif
|
| 725 |
|
|
/* Cleanup code parts. */
|
| 726 |
|
|
sit_cleanup();
|
| 727 |
|
|
ipv6_netdev_notif_cleanup();
|
| 728 |
|
|
ip6_flowlabel_cleanup();
|
| 729 |
|
|
addrconf_cleanup();
|
| 730 |
|
|
ip6_route_cleanup();
|
| 731 |
|
|
ipv6_packet_cleanup();
|
| 732 |
|
|
igmp6_cleanup();
|
| 733 |
|
|
ndisc_cleanup();
|
| 734 |
|
|
icmpv6_cleanup();
|
| 735 |
|
|
#ifdef CONFIG_SYSCTL
|
| 736 |
|
|
ipv6_sysctl_unregister();
|
| 737 |
|
|
#endif
|
| 738 |
|
|
}
|
| 739 |
|
|
module_exit(inet6_exit);
|
| 740 |
|
|
#endif /* MODULE */
|
| 741 |
|
|
MODULE_LICENSE("GPL");
|
