| 1 |
1275 |
phoenix |
/*
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| 2 |
|
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* INET An implementation of the TCP/IP protocol suite for the LINUX
|
| 3 |
|
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* operating system. INET is implemented using the BSD Socket
|
| 4 |
|
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* interface as the means of communication with the user level.
|
| 5 |
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*
|
| 6 |
|
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* The IP to API glue.
|
| 7 |
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*
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| 8 |
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* Version: $Id: ip_sockglue.c,v 1.1.1.1 2004-04-15 01:13:42 phoenix Exp $
|
| 9 |
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*
|
| 10 |
|
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* Authors: see ip.c
|
| 11 |
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*
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| 12 |
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* Fixes:
|
| 13 |
|
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* Many : Split from ip.c , see ip.c for history.
|
| 14 |
|
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* Martin Mares : TOS setting fixed.
|
| 15 |
|
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* Alan Cox : Fixed a couple of oopses in Martin's
|
| 16 |
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* TOS tweaks.
|
| 17 |
|
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* Mike McLagan : Routing by source
|
| 18 |
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*/
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| 19 |
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| 20 |
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#include <linux/config.h>
|
| 21 |
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#include <linux/types.h>
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| 22 |
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#include <linux/mm.h>
|
| 23 |
|
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#include <linux/sched.h>
|
| 24 |
|
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#include <linux/skbuff.h>
|
| 25 |
|
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#include <linux/ip.h>
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| 26 |
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#include <linux/icmp.h>
|
| 27 |
|
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#include <linux/netdevice.h>
|
| 28 |
|
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#include <net/sock.h>
|
| 29 |
|
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#include <net/ip.h>
|
| 30 |
|
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#include <net/icmp.h>
|
| 31 |
|
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#include <net/tcp.h>
|
| 32 |
|
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#include <linux/tcp.h>
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| 33 |
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#include <linux/udp.h>
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| 34 |
|
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#include <linux/igmp.h>
|
| 35 |
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#include <linux/netfilter.h>
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| 36 |
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#include <linux/route.h>
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| 37 |
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#include <linux/mroute.h>
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| 38 |
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#include <net/route.h>
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| 39 |
|
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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| 40 |
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#include <net/transp_v6.h>
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| 41 |
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#endif
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| 42 |
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| 43 |
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#include <linux/errqueue.h>
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| 44 |
|
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#include <asm/uaccess.h>
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| 45 |
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| 46 |
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#define IP_CMSG_PKTINFO 1
|
| 47 |
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#define IP_CMSG_TTL 2
|
| 48 |
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#define IP_CMSG_TOS 4
|
| 49 |
|
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#define IP_CMSG_RECVOPTS 8
|
| 50 |
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#define IP_CMSG_RETOPTS 16
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| 51 |
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| 52 |
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/*
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| 53 |
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* SOL_IP control messages.
|
| 54 |
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*/
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| 55 |
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| 56 |
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static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
|
| 57 |
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{
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| 58 |
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struct in_pktinfo info;
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| 59 |
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struct rtable *rt = (struct rtable *)skb->dst;
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| 60 |
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| 61 |
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info.ipi_addr.s_addr = skb->nh.iph->daddr;
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| 62 |
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if (rt) {
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| 63 |
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info.ipi_ifindex = rt->rt_iif;
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| 64 |
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info.ipi_spec_dst.s_addr = rt->rt_spec_dst;
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| 65 |
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} else {
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| 66 |
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info.ipi_ifindex = 0;
|
| 67 |
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info.ipi_spec_dst.s_addr = 0;
|
| 68 |
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}
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| 69 |
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|
|
| 70 |
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put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
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| 71 |
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}
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| 72 |
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| 73 |
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static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb)
|
| 74 |
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{
|
| 75 |
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int ttl = skb->nh.iph->ttl;
|
| 76 |
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put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl);
|
| 77 |
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}
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| 78 |
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| 79 |
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static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb)
|
| 80 |
|
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{
|
| 81 |
|
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put_cmsg(msg, SOL_IP, IP_TOS, 1, &skb->nh.iph->tos);
|
| 82 |
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}
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| 83 |
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|
| 84 |
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static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
|
| 85 |
|
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{
|
| 86 |
|
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if (IPCB(skb)->opt.optlen == 0)
|
| 87 |
|
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return;
|
| 88 |
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|
|
| 89 |
|
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put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen, skb->nh.iph+1);
|
| 90 |
|
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}
|
| 91 |
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| 92 |
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|
| 93 |
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void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
|
| 94 |
|
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{
|
| 95 |
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unsigned char optbuf[sizeof(struct ip_options) + 40];
|
| 96 |
|
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struct ip_options * opt = (struct ip_options*)optbuf;
|
| 97 |
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|
| 98 |
|
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if (IPCB(skb)->opt.optlen == 0)
|
| 99 |
|
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return;
|
| 100 |
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|
|
| 101 |
|
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if (ip_options_echo(opt, skb)) {
|
| 102 |
|
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msg->msg_flags |= MSG_CTRUNC;
|
| 103 |
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return;
|
| 104 |
|
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}
|
| 105 |
|
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ip_options_undo(opt);
|
| 106 |
|
|
|
| 107 |
|
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put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data);
|
| 108 |
|
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}
|
| 109 |
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|
| 110 |
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|
| 111 |
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void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
|
| 112 |
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{
|
| 113 |
|
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unsigned flags = skb->sk->protinfo.af_inet.cmsg_flags;
|
| 114 |
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|
| 115 |
|
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/* Ordered by supposed usage frequency */
|
| 116 |
|
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if (flags & 1)
|
| 117 |
|
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ip_cmsg_recv_pktinfo(msg, skb);
|
| 118 |
|
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if ((flags>>=1) == 0)
|
| 119 |
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return;
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| 120 |
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|
| 121 |
|
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if (flags & 1)
|
| 122 |
|
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ip_cmsg_recv_ttl(msg, skb);
|
| 123 |
|
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if ((flags>>=1) == 0)
|
| 124 |
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return;
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| 125 |
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|
| 126 |
|
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if (flags & 1)
|
| 127 |
|
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ip_cmsg_recv_tos(msg, skb);
|
| 128 |
|
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if ((flags>>=1) == 0)
|
| 129 |
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return;
|
| 130 |
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|
| 131 |
|
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if (flags & 1)
|
| 132 |
|
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ip_cmsg_recv_opts(msg, skb);
|
| 133 |
|
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if ((flags>>=1) == 0)
|
| 134 |
|
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return;
|
| 135 |
|
|
|
| 136 |
|
|
if (flags & 1)
|
| 137 |
|
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ip_cmsg_recv_retopts(msg, skb);
|
| 138 |
|
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}
|
| 139 |
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|
|
| 140 |
|
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int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc)
|
| 141 |
|
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{
|
| 142 |
|
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int err;
|
| 143 |
|
|
struct cmsghdr *cmsg;
|
| 144 |
|
|
|
| 145 |
|
|
for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
|
| 146 |
|
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if (cmsg->cmsg_len < sizeof(struct cmsghdr) ||
|
| 147 |
|
|
(unsigned long)(((char*)cmsg - (char*)msg->msg_control)
|
| 148 |
|
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+ cmsg->cmsg_len) > msg->msg_controllen) {
|
| 149 |
|
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return -EINVAL;
|
| 150 |
|
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}
|
| 151 |
|
|
if (cmsg->cmsg_level != SOL_IP)
|
| 152 |
|
|
continue;
|
| 153 |
|
|
switch (cmsg->cmsg_type) {
|
| 154 |
|
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case IP_RETOPTS:
|
| 155 |
|
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err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
|
| 156 |
|
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err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40, 0);
|
| 157 |
|
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if (err)
|
| 158 |
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return err;
|
| 159 |
|
|
break;
|
| 160 |
|
|
case IP_PKTINFO:
|
| 161 |
|
|
{
|
| 162 |
|
|
struct in_pktinfo *info;
|
| 163 |
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo)))
|
| 164 |
|
|
return -EINVAL;
|
| 165 |
|
|
info = (struct in_pktinfo *)CMSG_DATA(cmsg);
|
| 166 |
|
|
ipc->oif = info->ipi_ifindex;
|
| 167 |
|
|
ipc->addr = info->ipi_spec_dst.s_addr;
|
| 168 |
|
|
break;
|
| 169 |
|
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}
|
| 170 |
|
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default:
|
| 171 |
|
|
return -EINVAL;
|
| 172 |
|
|
}
|
| 173 |
|
|
}
|
| 174 |
|
|
return 0;
|
| 175 |
|
|
}
|
| 176 |
|
|
|
| 177 |
|
|
|
| 178 |
|
|
/* Special input handler for packets catched by router alert option.
|
| 179 |
|
|
They are selected only by protocol field, and then processed likely
|
| 180 |
|
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local ones; but only if someone wants them! Otherwise, router
|
| 181 |
|
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not running rsvpd will kill RSVP.
|
| 182 |
|
|
|
| 183 |
|
|
It is user level problem, what it will make with them.
|
| 184 |
|
|
I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
|
| 185 |
|
|
but receiver should be enough clever f.e. to forward mtrace requests,
|
| 186 |
|
|
sent to multicast group to reach destination designated router.
|
| 187 |
|
|
*/
|
| 188 |
|
|
struct ip_ra_chain *ip_ra_chain;
|
| 189 |
|
|
rwlock_t ip_ra_lock = RW_LOCK_UNLOCKED;
|
| 190 |
|
|
|
| 191 |
|
|
int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *))
|
| 192 |
|
|
{
|
| 193 |
|
|
struct ip_ra_chain *ra, *new_ra, **rap;
|
| 194 |
|
|
|
| 195 |
|
|
if (sk->type != SOCK_RAW || sk->num == IPPROTO_RAW)
|
| 196 |
|
|
return -EINVAL;
|
| 197 |
|
|
|
| 198 |
|
|
new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
|
| 199 |
|
|
|
| 200 |
|
|
write_lock_bh(&ip_ra_lock);
|
| 201 |
|
|
for (rap = &ip_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
|
| 202 |
|
|
if (ra->sk == sk) {
|
| 203 |
|
|
if (on) {
|
| 204 |
|
|
write_unlock_bh(&ip_ra_lock);
|
| 205 |
|
|
if (new_ra)
|
| 206 |
|
|
kfree(new_ra);
|
| 207 |
|
|
return -EADDRINUSE;
|
| 208 |
|
|
}
|
| 209 |
|
|
*rap = ra->next;
|
| 210 |
|
|
write_unlock_bh(&ip_ra_lock);
|
| 211 |
|
|
|
| 212 |
|
|
if (ra->destructor)
|
| 213 |
|
|
ra->destructor(sk);
|
| 214 |
|
|
sock_put(sk);
|
| 215 |
|
|
kfree(ra);
|
| 216 |
|
|
return 0;
|
| 217 |
|
|
}
|
| 218 |
|
|
}
|
| 219 |
|
|
if (new_ra == NULL) {
|
| 220 |
|
|
write_unlock_bh(&ip_ra_lock);
|
| 221 |
|
|
return -ENOBUFS;
|
| 222 |
|
|
}
|
| 223 |
|
|
new_ra->sk = sk;
|
| 224 |
|
|
new_ra->destructor = destructor;
|
| 225 |
|
|
|
| 226 |
|
|
new_ra->next = ra;
|
| 227 |
|
|
*rap = new_ra;
|
| 228 |
|
|
sock_hold(sk);
|
| 229 |
|
|
write_unlock_bh(&ip_ra_lock);
|
| 230 |
|
|
|
| 231 |
|
|
return 0;
|
| 232 |
|
|
}
|
| 233 |
|
|
|
| 234 |
|
|
void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
|
| 235 |
|
|
u16 port, u32 info, u8 *payload)
|
| 236 |
|
|
{
|
| 237 |
|
|
struct sock_exterr_skb *serr;
|
| 238 |
|
|
|
| 239 |
|
|
if (!sk->protinfo.af_inet.recverr)
|
| 240 |
|
|
return;
|
| 241 |
|
|
|
| 242 |
|
|
skb = skb_clone(skb, GFP_ATOMIC);
|
| 243 |
|
|
if (!skb)
|
| 244 |
|
|
return;
|
| 245 |
|
|
|
| 246 |
|
|
serr = SKB_EXT_ERR(skb);
|
| 247 |
|
|
serr->ee.ee_errno = err;
|
| 248 |
|
|
serr->ee.ee_origin = SO_EE_ORIGIN_ICMP;
|
| 249 |
|
|
serr->ee.ee_type = skb->h.icmph->type;
|
| 250 |
|
|
serr->ee.ee_code = skb->h.icmph->code;
|
| 251 |
|
|
serr->ee.ee_pad = 0;
|
| 252 |
|
|
serr->ee.ee_info = info;
|
| 253 |
|
|
serr->ee.ee_data = 0;
|
| 254 |
|
|
serr->addr_offset = (u8*)&(((struct iphdr*)(skb->h.icmph+1))->daddr) - skb->nh.raw;
|
| 255 |
|
|
serr->port = port;
|
| 256 |
|
|
|
| 257 |
|
|
skb->h.raw = payload;
|
| 258 |
|
|
if (!skb_pull(skb, payload - skb->data) ||
|
| 259 |
|
|
sock_queue_err_skb(sk, skb))
|
| 260 |
|
|
kfree_skb(skb);
|
| 261 |
|
|
}
|
| 262 |
|
|
|
| 263 |
|
|
void ip_local_error(struct sock *sk, int err, u32 daddr, u16 port, u32 info)
|
| 264 |
|
|
{
|
| 265 |
|
|
struct sock_exterr_skb *serr;
|
| 266 |
|
|
struct iphdr *iph;
|
| 267 |
|
|
struct sk_buff *skb;
|
| 268 |
|
|
|
| 269 |
|
|
if (!sk->protinfo.af_inet.recverr)
|
| 270 |
|
|
return;
|
| 271 |
|
|
|
| 272 |
|
|
skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC);
|
| 273 |
|
|
if (!skb)
|
| 274 |
|
|
return;
|
| 275 |
|
|
|
| 276 |
|
|
iph = (struct iphdr*)skb_put(skb, sizeof(struct iphdr));
|
| 277 |
|
|
skb->nh.iph = iph;
|
| 278 |
|
|
iph->daddr = daddr;
|
| 279 |
|
|
|
| 280 |
|
|
serr = SKB_EXT_ERR(skb);
|
| 281 |
|
|
serr->ee.ee_errno = err;
|
| 282 |
|
|
serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
|
| 283 |
|
|
serr->ee.ee_type = 0;
|
| 284 |
|
|
serr->ee.ee_code = 0;
|
| 285 |
|
|
serr->ee.ee_pad = 0;
|
| 286 |
|
|
serr->ee.ee_info = info;
|
| 287 |
|
|
serr->ee.ee_data = 0;
|
| 288 |
|
|
serr->addr_offset = (u8*)&iph->daddr - skb->nh.raw;
|
| 289 |
|
|
serr->port = port;
|
| 290 |
|
|
|
| 291 |
|
|
skb->h.raw = skb->tail;
|
| 292 |
|
|
__skb_pull(skb, skb->tail - skb->data);
|
| 293 |
|
|
|
| 294 |
|
|
if (sock_queue_err_skb(sk, skb))
|
| 295 |
|
|
kfree_skb(skb);
|
| 296 |
|
|
}
|
| 297 |
|
|
|
| 298 |
|
|
/*
|
| 299 |
|
|
* Handle MSG_ERRQUEUE
|
| 300 |
|
|
*/
|
| 301 |
|
|
int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
|
| 302 |
|
|
{
|
| 303 |
|
|
struct sock_exterr_skb *serr;
|
| 304 |
|
|
struct sk_buff *skb, *skb2;
|
| 305 |
|
|
struct sockaddr_in *sin;
|
| 306 |
|
|
struct {
|
| 307 |
|
|
struct sock_extended_err ee;
|
| 308 |
|
|
struct sockaddr_in offender;
|
| 309 |
|
|
} errhdr;
|
| 310 |
|
|
int err;
|
| 311 |
|
|
int copied;
|
| 312 |
|
|
|
| 313 |
|
|
err = -EAGAIN;
|
| 314 |
|
|
skb = skb_dequeue(&sk->error_queue);
|
| 315 |
|
|
if (skb == NULL)
|
| 316 |
|
|
goto out;
|
| 317 |
|
|
|
| 318 |
|
|
copied = skb->len;
|
| 319 |
|
|
if (copied > len) {
|
| 320 |
|
|
msg->msg_flags |= MSG_TRUNC;
|
| 321 |
|
|
copied = len;
|
| 322 |
|
|
}
|
| 323 |
|
|
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
| 324 |
|
|
if (err)
|
| 325 |
|
|
goto out_free_skb;
|
| 326 |
|
|
|
| 327 |
|
|
sock_recv_timestamp(msg, sk, skb);
|
| 328 |
|
|
|
| 329 |
|
|
serr = SKB_EXT_ERR(skb);
|
| 330 |
|
|
|
| 331 |
|
|
sin = (struct sockaddr_in *)msg->msg_name;
|
| 332 |
|
|
if (sin) {
|
| 333 |
|
|
sin->sin_family = AF_INET;
|
| 334 |
|
|
sin->sin_addr.s_addr = *(u32*)(skb->nh.raw + serr->addr_offset);
|
| 335 |
|
|
sin->sin_port = serr->port;
|
| 336 |
|
|
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
|
| 337 |
|
|
}
|
| 338 |
|
|
|
| 339 |
|
|
memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
|
| 340 |
|
|
sin = &errhdr.offender;
|
| 341 |
|
|
sin->sin_family = AF_UNSPEC;
|
| 342 |
|
|
if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) {
|
| 343 |
|
|
sin->sin_family = AF_INET;
|
| 344 |
|
|
sin->sin_addr.s_addr = skb->nh.iph->saddr;
|
| 345 |
|
|
sin->sin_port = 0;
|
| 346 |
|
|
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
|
| 347 |
|
|
if (sk->protinfo.af_inet.cmsg_flags)
|
| 348 |
|
|
ip_cmsg_recv(msg, skb);
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr);
|
| 352 |
|
|
|
| 353 |
|
|
/* Now we could try to dump offended packet options */
|
| 354 |
|
|
|
| 355 |
|
|
msg->msg_flags |= MSG_ERRQUEUE;
|
| 356 |
|
|
err = copied;
|
| 357 |
|
|
|
| 358 |
|
|
/* Reset and regenerate socket error */
|
| 359 |
|
|
spin_lock_irq(&sk->error_queue.lock);
|
| 360 |
|
|
sk->err = 0;
|
| 361 |
|
|
if ((skb2 = skb_peek(&sk->error_queue)) != NULL) {
|
| 362 |
|
|
sk->err = SKB_EXT_ERR(skb2)->ee.ee_errno;
|
| 363 |
|
|
spin_unlock_irq(&sk->error_queue.lock);
|
| 364 |
|
|
sk->error_report(sk);
|
| 365 |
|
|
} else {
|
| 366 |
|
|
spin_unlock_irq(&sk->error_queue.lock);
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
out_free_skb:
|
| 370 |
|
|
kfree_skb(skb);
|
| 371 |
|
|
out:
|
| 372 |
|
|
return err;
|
| 373 |
|
|
}
|
| 374 |
|
|
|
| 375 |
|
|
|
| 376 |
|
|
/*
|
| 377 |
|
|
* Socket option code for IP. This is the end of the line after any TCP,UDP etc options on
|
| 378 |
|
|
* an IP socket.
|
| 379 |
|
|
*/
|
| 380 |
|
|
|
| 381 |
|
|
int ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen)
|
| 382 |
|
|
{
|
| 383 |
|
|
int val=0,err;
|
| 384 |
|
|
|
| 385 |
|
|
if (level != SOL_IP)
|
| 386 |
|
|
return -ENOPROTOOPT;
|
| 387 |
|
|
|
| 388 |
|
|
if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) |
|
| 389 |
|
|
(1<<IP_RECVOPTS) | (1<<IP_RECVTOS) |
|
| 390 |
|
|
(1<<IP_RETOPTS) | (1<<IP_TOS) |
|
| 391 |
|
|
(1<<IP_TTL) | (1<<IP_HDRINCL) |
|
| 392 |
|
|
(1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
|
| 393 |
|
|
(1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND))) ||
|
| 394 |
|
|
optname == IP_MULTICAST_TTL ||
|
| 395 |
|
|
optname == IP_MULTICAST_LOOP) {
|
| 396 |
|
|
if (optlen >= sizeof(int)) {
|
| 397 |
|
|
if (get_user(val, (int *) optval))
|
| 398 |
|
|
return -EFAULT;
|
| 399 |
|
|
} else if (optlen >= sizeof(char)) {
|
| 400 |
|
|
unsigned char ucval;
|
| 401 |
|
|
|
| 402 |
|
|
if (get_user(ucval, (unsigned char *) optval))
|
| 403 |
|
|
return -EFAULT;
|
| 404 |
|
|
val = (int) ucval;
|
| 405 |
|
|
}
|
| 406 |
|
|
}
|
| 407 |
|
|
|
| 408 |
|
|
/* If optlen==0, it is equivalent to val == 0 */
|
| 409 |
|
|
|
| 410 |
|
|
#ifdef CONFIG_IP_MROUTE
|
| 411 |
|
|
if (optname >= MRT_BASE && optname <= (MRT_BASE + 10))
|
| 412 |
|
|
return ip_mroute_setsockopt(sk,optname,optval,optlen);
|
| 413 |
|
|
#endif
|
| 414 |
|
|
|
| 415 |
|
|
err = 0;
|
| 416 |
|
|
lock_sock(sk);
|
| 417 |
|
|
|
| 418 |
|
|
switch (optname) {
|
| 419 |
|
|
case IP_OPTIONS:
|
| 420 |
|
|
{
|
| 421 |
|
|
struct ip_options * opt = NULL;
|
| 422 |
|
|
if (optlen > 40 || optlen < 0)
|
| 423 |
|
|
goto e_inval;
|
| 424 |
|
|
err = ip_options_get(&opt, optval, optlen, 1);
|
| 425 |
|
|
if (err)
|
| 426 |
|
|
break;
|
| 427 |
|
|
if (sk->type == SOCK_STREAM) {
|
| 428 |
|
|
struct tcp_opt *tp = &sk->tp_pinfo.af_tcp;
|
| 429 |
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
| 430 |
|
|
if (sk->family == PF_INET ||
|
| 431 |
|
|
(!((1<<sk->state)&(TCPF_LISTEN|TCPF_CLOSE))
|
| 432 |
|
|
&& sk->daddr != LOOPBACK4_IPV6)) {
|
| 433 |
|
|
#endif
|
| 434 |
|
|
if (opt)
|
| 435 |
|
|
tp->ext_header_len = opt->optlen;
|
| 436 |
|
|
tcp_sync_mss(sk, tp->pmtu_cookie);
|
| 437 |
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
| 438 |
|
|
}
|
| 439 |
|
|
#endif
|
| 440 |
|
|
}
|
| 441 |
|
|
opt = xchg(&sk->protinfo.af_inet.opt, opt);
|
| 442 |
|
|
if (opt)
|
| 443 |
|
|
kfree(opt);
|
| 444 |
|
|
break;
|
| 445 |
|
|
}
|
| 446 |
|
|
case IP_PKTINFO:
|
| 447 |
|
|
if (val)
|
| 448 |
|
|
sk->protinfo.af_inet.cmsg_flags |= IP_CMSG_PKTINFO;
|
| 449 |
|
|
else
|
| 450 |
|
|
sk->protinfo.af_inet.cmsg_flags &= ~IP_CMSG_PKTINFO;
|
| 451 |
|
|
break;
|
| 452 |
|
|
case IP_RECVTTL:
|
| 453 |
|
|
if (val)
|
| 454 |
|
|
sk->protinfo.af_inet.cmsg_flags |= IP_CMSG_TTL;
|
| 455 |
|
|
else
|
| 456 |
|
|
sk->protinfo.af_inet.cmsg_flags &= ~IP_CMSG_TTL;
|
| 457 |
|
|
break;
|
| 458 |
|
|
case IP_RECVTOS:
|
| 459 |
|
|
if (val)
|
| 460 |
|
|
sk->protinfo.af_inet.cmsg_flags |= IP_CMSG_TOS;
|
| 461 |
|
|
else
|
| 462 |
|
|
sk->protinfo.af_inet.cmsg_flags &= ~IP_CMSG_TOS;
|
| 463 |
|
|
break;
|
| 464 |
|
|
case IP_RECVOPTS:
|
| 465 |
|
|
if (val)
|
| 466 |
|
|
sk->protinfo.af_inet.cmsg_flags |= IP_CMSG_RECVOPTS;
|
| 467 |
|
|
else
|
| 468 |
|
|
sk->protinfo.af_inet.cmsg_flags &= ~IP_CMSG_RECVOPTS;
|
| 469 |
|
|
break;
|
| 470 |
|
|
case IP_RETOPTS:
|
| 471 |
|
|
if (val)
|
| 472 |
|
|
sk->protinfo.af_inet.cmsg_flags |= IP_CMSG_RETOPTS;
|
| 473 |
|
|
else
|
| 474 |
|
|
sk->protinfo.af_inet.cmsg_flags &= ~IP_CMSG_RETOPTS;
|
| 475 |
|
|
break;
|
| 476 |
|
|
case IP_TOS: /* This sets both TOS and Precedence */
|
| 477 |
|
|
if (sk->type == SOCK_STREAM) {
|
| 478 |
|
|
val &= ~3;
|
| 479 |
|
|
val |= sk->protinfo.af_inet.tos & 3;
|
| 480 |
|
|
}
|
| 481 |
|
|
if (IPTOS_PREC(val) >= IPTOS_PREC_CRITIC_ECP &&
|
| 482 |
|
|
!capable(CAP_NET_ADMIN)) {
|
| 483 |
|
|
err = -EPERM;
|
| 484 |
|
|
break;
|
| 485 |
|
|
}
|
| 486 |
|
|
if (sk->protinfo.af_inet.tos != val) {
|
| 487 |
|
|
sk->protinfo.af_inet.tos=val;
|
| 488 |
|
|
sk->priority = rt_tos2priority(val);
|
| 489 |
|
|
sk_dst_reset(sk);
|
| 490 |
|
|
}
|
| 491 |
|
|
break;
|
| 492 |
|
|
case IP_TTL:
|
| 493 |
|
|
if (optlen<1)
|
| 494 |
|
|
goto e_inval;
|
| 495 |
|
|
if(val==-1)
|
| 496 |
|
|
val = sysctl_ip_default_ttl;
|
| 497 |
|
|
if(val<1||val>255)
|
| 498 |
|
|
goto e_inval;
|
| 499 |
|
|
sk->protinfo.af_inet.ttl=val;
|
| 500 |
|
|
break;
|
| 501 |
|
|
case IP_HDRINCL:
|
| 502 |
|
|
if(sk->type!=SOCK_RAW) {
|
| 503 |
|
|
err = -ENOPROTOOPT;
|
| 504 |
|
|
break;
|
| 505 |
|
|
}
|
| 506 |
|
|
sk->protinfo.af_inet.hdrincl=val?1:0;
|
| 507 |
|
|
break;
|
| 508 |
|
|
case IP_MTU_DISCOVER:
|
| 509 |
|
|
if (val<0 || val>2)
|
| 510 |
|
|
goto e_inval;
|
| 511 |
|
|
sk->protinfo.af_inet.pmtudisc = val;
|
| 512 |
|
|
break;
|
| 513 |
|
|
case IP_RECVERR:
|
| 514 |
|
|
sk->protinfo.af_inet.recverr = !!val;
|
| 515 |
|
|
if (!val)
|
| 516 |
|
|
skb_queue_purge(&sk->error_queue);
|
| 517 |
|
|
break;
|
| 518 |
|
|
case IP_MULTICAST_TTL:
|
| 519 |
|
|
if (sk->type == SOCK_STREAM)
|
| 520 |
|
|
goto e_inval;
|
| 521 |
|
|
if (optlen<1)
|
| 522 |
|
|
goto e_inval;
|
| 523 |
|
|
if (val==-1)
|
| 524 |
|
|
val = 1;
|
| 525 |
|
|
if (val < 0 || val > 255)
|
| 526 |
|
|
goto e_inval;
|
| 527 |
|
|
sk->protinfo.af_inet.mc_ttl=val;
|
| 528 |
|
|
break;
|
| 529 |
|
|
case IP_MULTICAST_LOOP:
|
| 530 |
|
|
if (optlen<1)
|
| 531 |
|
|
goto e_inval;
|
| 532 |
|
|
sk->protinfo.af_inet.mc_loop = val ? 1 : 0;
|
| 533 |
|
|
break;
|
| 534 |
|
|
case IP_MULTICAST_IF:
|
| 535 |
|
|
{
|
| 536 |
|
|
struct ip_mreqn mreq;
|
| 537 |
|
|
struct net_device *dev = NULL;
|
| 538 |
|
|
|
| 539 |
|
|
if (sk->type == SOCK_STREAM)
|
| 540 |
|
|
goto e_inval;
|
| 541 |
|
|
/*
|
| 542 |
|
|
* Check the arguments are allowable
|
| 543 |
|
|
*/
|
| 544 |
|
|
|
| 545 |
|
|
err = -EFAULT;
|
| 546 |
|
|
if (optlen >= sizeof(struct ip_mreqn)) {
|
| 547 |
|
|
if (copy_from_user(&mreq,optval,sizeof(mreq)))
|
| 548 |
|
|
break;
|
| 549 |
|
|
} else {
|
| 550 |
|
|
memset(&mreq, 0, sizeof(mreq));
|
| 551 |
|
|
if (optlen >= sizeof(struct in_addr) &&
|
| 552 |
|
|
copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr)))
|
| 553 |
|
|
break;
|
| 554 |
|
|
}
|
| 555 |
|
|
|
| 556 |
|
|
if (!mreq.imr_ifindex) {
|
| 557 |
|
|
if (mreq.imr_address.s_addr == INADDR_ANY) {
|
| 558 |
|
|
sk->protinfo.af_inet.mc_index = 0;
|
| 559 |
|
|
sk->protinfo.af_inet.mc_addr = 0;
|
| 560 |
|
|
err = 0;
|
| 561 |
|
|
break;
|
| 562 |
|
|
}
|
| 563 |
|
|
dev = ip_dev_find(mreq.imr_address.s_addr);
|
| 564 |
|
|
if (dev) {
|
| 565 |
|
|
mreq.imr_ifindex = dev->ifindex;
|
| 566 |
|
|
dev_put(dev);
|
| 567 |
|
|
}
|
| 568 |
|
|
} else
|
| 569 |
|
|
dev = __dev_get_by_index(mreq.imr_ifindex);
|
| 570 |
|
|
|
| 571 |
|
|
|
| 572 |
|
|
err = -EADDRNOTAVAIL;
|
| 573 |
|
|
if (!dev)
|
| 574 |
|
|
break;
|
| 575 |
|
|
|
| 576 |
|
|
err = -EINVAL;
|
| 577 |
|
|
if (sk->bound_dev_if && mreq.imr_ifindex != sk->bound_dev_if)
|
| 578 |
|
|
break;
|
| 579 |
|
|
|
| 580 |
|
|
sk->protinfo.af_inet.mc_index = mreq.imr_ifindex;
|
| 581 |
|
|
sk->protinfo.af_inet.mc_addr = mreq.imr_address.s_addr;
|
| 582 |
|
|
err = 0;
|
| 583 |
|
|
break;
|
| 584 |
|
|
}
|
| 585 |
|
|
|
| 586 |
|
|
case IP_ADD_MEMBERSHIP:
|
| 587 |
|
|
case IP_DROP_MEMBERSHIP:
|
| 588 |
|
|
{
|
| 589 |
|
|
struct ip_mreqn mreq;
|
| 590 |
|
|
|
| 591 |
|
|
if (optlen < sizeof(struct ip_mreq))
|
| 592 |
|
|
goto e_inval;
|
| 593 |
|
|
err = -EFAULT;
|
| 594 |
|
|
if (optlen >= sizeof(struct ip_mreqn)) {
|
| 595 |
|
|
if(copy_from_user(&mreq,optval,sizeof(mreq)))
|
| 596 |
|
|
break;
|
| 597 |
|
|
} else {
|
| 598 |
|
|
memset(&mreq, 0, sizeof(mreq));
|
| 599 |
|
|
if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq)))
|
| 600 |
|
|
break;
|
| 601 |
|
|
}
|
| 602 |
|
|
|
| 603 |
|
|
if (optname == IP_ADD_MEMBERSHIP)
|
| 604 |
|
|
err = ip_mc_join_group(sk, &mreq);
|
| 605 |
|
|
else
|
| 606 |
|
|
err = ip_mc_leave_group(sk, &mreq);
|
| 607 |
|
|
break;
|
| 608 |
|
|
}
|
| 609 |
|
|
case IP_MSFILTER:
|
| 610 |
|
|
{
|
| 611 |
|
|
extern int sysctl_optmem_max;
|
| 612 |
|
|
extern int sysctl_igmp_max_msf;
|
| 613 |
|
|
struct ip_msfilter *msf;
|
| 614 |
|
|
|
| 615 |
|
|
if (optlen < IP_MSFILTER_SIZE(0))
|
| 616 |
|
|
goto e_inval;
|
| 617 |
|
|
if (optlen > sysctl_optmem_max) {
|
| 618 |
|
|
err = -ENOBUFS;
|
| 619 |
|
|
break;
|
| 620 |
|
|
}
|
| 621 |
|
|
msf = (struct ip_msfilter *)kmalloc(optlen, GFP_KERNEL);
|
| 622 |
|
|
if (msf == 0) {
|
| 623 |
|
|
err = -ENOBUFS;
|
| 624 |
|
|
break;
|
| 625 |
|
|
}
|
| 626 |
|
|
err = -EFAULT;
|
| 627 |
|
|
if (copy_from_user(msf, optval, optlen)) {
|
| 628 |
|
|
kfree(msf);
|
| 629 |
|
|
break;
|
| 630 |
|
|
}
|
| 631 |
|
|
/* numsrc >= (1G-4) overflow in 32 bits */
|
| 632 |
|
|
if (msf->imsf_numsrc >= 0x3ffffffcU ||
|
| 633 |
|
|
msf->imsf_numsrc > sysctl_igmp_max_msf) {
|
| 634 |
|
|
kfree(msf);
|
| 635 |
|
|
err = -ENOBUFS;
|
| 636 |
|
|
break;
|
| 637 |
|
|
}
|
| 638 |
|
|
if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) {
|
| 639 |
|
|
kfree(msf);
|
| 640 |
|
|
err = -EINVAL;
|
| 641 |
|
|
break;
|
| 642 |
|
|
}
|
| 643 |
|
|
err = ip_mc_msfilter(sk, msf, 0);
|
| 644 |
|
|
kfree(msf);
|
| 645 |
|
|
break;
|
| 646 |
|
|
}
|
| 647 |
|
|
case IP_BLOCK_SOURCE:
|
| 648 |
|
|
case IP_UNBLOCK_SOURCE:
|
| 649 |
|
|
case IP_ADD_SOURCE_MEMBERSHIP:
|
| 650 |
|
|
case IP_DROP_SOURCE_MEMBERSHIP:
|
| 651 |
|
|
{
|
| 652 |
|
|
struct ip_mreq_source mreqs;
|
| 653 |
|
|
int omode, add;
|
| 654 |
|
|
|
| 655 |
|
|
if (optlen != sizeof(struct ip_mreq_source))
|
| 656 |
|
|
goto e_inval;
|
| 657 |
|
|
if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
|
| 658 |
|
|
err = -EFAULT;
|
| 659 |
|
|
break;
|
| 660 |
|
|
}
|
| 661 |
|
|
if (optname == IP_BLOCK_SOURCE) {
|
| 662 |
|
|
omode = MCAST_EXCLUDE;
|
| 663 |
|
|
add = 1;
|
| 664 |
|
|
} else if (optname == IP_UNBLOCK_SOURCE) {
|
| 665 |
|
|
omode = MCAST_EXCLUDE;
|
| 666 |
|
|
add = 0;
|
| 667 |
|
|
} else if (optname == IP_ADD_SOURCE_MEMBERSHIP) {
|
| 668 |
|
|
struct ip_mreqn mreq;
|
| 669 |
|
|
|
| 670 |
|
|
mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
|
| 671 |
|
|
mreq.imr_address.s_addr = mreqs.imr_interface;
|
| 672 |
|
|
mreq.imr_ifindex = 0;
|
| 673 |
|
|
err = ip_mc_join_group(sk, &mreq);
|
| 674 |
|
|
if (err)
|
| 675 |
|
|
break;
|
| 676 |
|
|
omode = MCAST_INCLUDE;
|
| 677 |
|
|
add = 1;
|
| 678 |
|
|
} else /*IP_DROP_SOURCE_MEMBERSHIP */ {
|
| 679 |
|
|
omode = MCAST_INCLUDE;
|
| 680 |
|
|
add = 0;
|
| 681 |
|
|
}
|
| 682 |
|
|
err = ip_mc_source(add, omode, sk, &mreqs, 0);
|
| 683 |
|
|
break;
|
| 684 |
|
|
}
|
| 685 |
|
|
case MCAST_JOIN_GROUP:
|
| 686 |
|
|
case MCAST_LEAVE_GROUP:
|
| 687 |
|
|
{
|
| 688 |
|
|
struct group_req greq;
|
| 689 |
|
|
struct sockaddr_in *psin;
|
| 690 |
|
|
struct ip_mreqn mreq;
|
| 691 |
|
|
|
| 692 |
|
|
if (optlen < sizeof(struct group_req))
|
| 693 |
|
|
goto e_inval;
|
| 694 |
|
|
err = -EFAULT;
|
| 695 |
|
|
if(copy_from_user(&greq, optval, sizeof(greq)))
|
| 696 |
|
|
break;
|
| 697 |
|
|
psin = (struct sockaddr_in *)&greq.gr_group;
|
| 698 |
|
|
if (psin->sin_family != AF_INET)
|
| 699 |
|
|
goto e_inval;
|
| 700 |
|
|
memset(&mreq, 0, sizeof(mreq));
|
| 701 |
|
|
mreq.imr_multiaddr = psin->sin_addr;
|
| 702 |
|
|
mreq.imr_ifindex = greq.gr_interface;
|
| 703 |
|
|
|
| 704 |
|
|
if (optname == MCAST_JOIN_GROUP)
|
| 705 |
|
|
err = ip_mc_join_group(sk, &mreq);
|
| 706 |
|
|
else
|
| 707 |
|
|
err = ip_mc_leave_group(sk, &mreq);
|
| 708 |
|
|
break;
|
| 709 |
|
|
}
|
| 710 |
|
|
case MCAST_JOIN_SOURCE_GROUP:
|
| 711 |
|
|
case MCAST_LEAVE_SOURCE_GROUP:
|
| 712 |
|
|
case MCAST_BLOCK_SOURCE:
|
| 713 |
|
|
case MCAST_UNBLOCK_SOURCE:
|
| 714 |
|
|
{
|
| 715 |
|
|
struct group_source_req greqs;
|
| 716 |
|
|
struct ip_mreq_source mreqs;
|
| 717 |
|
|
struct sockaddr_in *psin;
|
| 718 |
|
|
int omode, add;
|
| 719 |
|
|
|
| 720 |
|
|
if (optlen != sizeof(struct group_source_req))
|
| 721 |
|
|
goto e_inval;
|
| 722 |
|
|
if (copy_from_user(&greqs, optval, sizeof(greqs))) {
|
| 723 |
|
|
err = -EFAULT;
|
| 724 |
|
|
break;
|
| 725 |
|
|
}
|
| 726 |
|
|
if (greqs.gsr_group.ss_family != AF_INET ||
|
| 727 |
|
|
greqs.gsr_source.ss_family != AF_INET) {
|
| 728 |
|
|
err = -EADDRNOTAVAIL;
|
| 729 |
|
|
break;
|
| 730 |
|
|
}
|
| 731 |
|
|
psin = (struct sockaddr_in *)&greqs.gsr_group;
|
| 732 |
|
|
mreqs.imr_multiaddr = psin->sin_addr.s_addr;
|
| 733 |
|
|
psin = (struct sockaddr_in *)&greqs.gsr_source;
|
| 734 |
|
|
mreqs.imr_sourceaddr = psin->sin_addr.s_addr;
|
| 735 |
|
|
mreqs.imr_interface = 0; /* use index for mc_source */
|
| 736 |
|
|
|
| 737 |
|
|
if (optname == MCAST_BLOCK_SOURCE) {
|
| 738 |
|
|
omode = MCAST_EXCLUDE;
|
| 739 |
|
|
add = 1;
|
| 740 |
|
|
} else if (optname == MCAST_UNBLOCK_SOURCE) {
|
| 741 |
|
|
omode = MCAST_EXCLUDE;
|
| 742 |
|
|
add = 0;
|
| 743 |
|
|
} else if (optname == MCAST_JOIN_SOURCE_GROUP) {
|
| 744 |
|
|
struct ip_mreqn mreq;
|
| 745 |
|
|
|
| 746 |
|
|
psin = (struct sockaddr_in *)&greqs.gsr_group;
|
| 747 |
|
|
mreq.imr_multiaddr = psin->sin_addr;
|
| 748 |
|
|
mreq.imr_address.s_addr = 0;
|
| 749 |
|
|
mreq.imr_ifindex = greqs.gsr_interface;
|
| 750 |
|
|
err = ip_mc_join_group(sk, &mreq);
|
| 751 |
|
|
if (err)
|
| 752 |
|
|
break;
|
| 753 |
|
|
omode = MCAST_INCLUDE;
|
| 754 |
|
|
add = 1;
|
| 755 |
|
|
} else /* MCAST_LEAVE_SOURCE_GROUP */ {
|
| 756 |
|
|
omode = MCAST_INCLUDE;
|
| 757 |
|
|
add = 0;
|
| 758 |
|
|
}
|
| 759 |
|
|
err = ip_mc_source(add, omode, sk, &mreqs,
|
| 760 |
|
|
greqs.gsr_interface);
|
| 761 |
|
|
break;
|
| 762 |
|
|
}
|
| 763 |
|
|
case MCAST_MSFILTER:
|
| 764 |
|
|
{
|
| 765 |
|
|
extern int sysctl_optmem_max;
|
| 766 |
|
|
extern int sysctl_igmp_max_msf;
|
| 767 |
|
|
struct sockaddr_in *psin;
|
| 768 |
|
|
struct ip_msfilter *msf = 0;
|
| 769 |
|
|
struct group_filter *gsf = 0;
|
| 770 |
|
|
int msize, i, ifindex;
|
| 771 |
|
|
|
| 772 |
|
|
if (optlen < GROUP_FILTER_SIZE(0))
|
| 773 |
|
|
goto e_inval;
|
| 774 |
|
|
if (optlen > sysctl_optmem_max) {
|
| 775 |
|
|
err = -ENOBUFS;
|
| 776 |
|
|
break;
|
| 777 |
|
|
}
|
| 778 |
|
|
gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
|
| 779 |
|
|
if (gsf == 0) {
|
| 780 |
|
|
err = -ENOBUFS;
|
| 781 |
|
|
break;
|
| 782 |
|
|
}
|
| 783 |
|
|
err = -EFAULT;
|
| 784 |
|
|
if (copy_from_user(gsf, optval, optlen)) {
|
| 785 |
|
|
goto mc_msf_out;
|
| 786 |
|
|
}
|
| 787 |
|
|
/* numsrc >= (4G-140)/128 overflow in 32 bits */
|
| 788 |
|
|
if (gsf->gf_numsrc >= 0x1ffffff ||
|
| 789 |
|
|
gsf->gf_numsrc > sysctl_igmp_max_msf) {
|
| 790 |
|
|
err = -ENOBUFS;
|
| 791 |
|
|
goto mc_msf_out;
|
| 792 |
|
|
}
|
| 793 |
|
|
if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
|
| 794 |
|
|
err = EINVAL;
|
| 795 |
|
|
goto mc_msf_out;
|
| 796 |
|
|
}
|
| 797 |
|
|
msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
|
| 798 |
|
|
msf = (struct ip_msfilter *)kmalloc(msize,GFP_KERNEL);
|
| 799 |
|
|
if (msf == 0) {
|
| 800 |
|
|
err = -ENOBUFS;
|
| 801 |
|
|
goto mc_msf_out;
|
| 802 |
|
|
}
|
| 803 |
|
|
ifindex = gsf->gf_interface;
|
| 804 |
|
|
psin = (struct sockaddr_in *)&gsf->gf_group;
|
| 805 |
|
|
if (psin->sin_family != AF_INET) {
|
| 806 |
|
|
err = -EADDRNOTAVAIL;
|
| 807 |
|
|
goto mc_msf_out;
|
| 808 |
|
|
}
|
| 809 |
|
|
msf->imsf_multiaddr = psin->sin_addr.s_addr;
|
| 810 |
|
|
msf->imsf_interface = 0;
|
| 811 |
|
|
msf->imsf_fmode = gsf->gf_fmode;
|
| 812 |
|
|
msf->imsf_numsrc = gsf->gf_numsrc;
|
| 813 |
|
|
err = -EADDRNOTAVAIL;
|
| 814 |
|
|
for (i=0; i<gsf->gf_numsrc; ++i) {
|
| 815 |
|
|
psin = (struct sockaddr_in *)&gsf->gf_slist[i];
|
| 816 |
|
|
|
| 817 |
|
|
if (psin->sin_family != AF_INET)
|
| 818 |
|
|
goto mc_msf_out;
|
| 819 |
|
|
msf->imsf_slist[i] = psin->sin_addr.s_addr;
|
| 820 |
|
|
}
|
| 821 |
|
|
kfree(gsf);
|
| 822 |
|
|
gsf = 0;
|
| 823 |
|
|
|
| 824 |
|
|
err = ip_mc_msfilter(sk, msf, ifindex);
|
| 825 |
|
|
mc_msf_out:
|
| 826 |
|
|
if (msf)
|
| 827 |
|
|
kfree(msf);
|
| 828 |
|
|
if (gsf)
|
| 829 |
|
|
kfree(gsf);
|
| 830 |
|
|
break;
|
| 831 |
|
|
}
|
| 832 |
|
|
case IP_ROUTER_ALERT:
|
| 833 |
|
|
err = ip_ra_control(sk, val ? 1 : 0, NULL);
|
| 834 |
|
|
break;
|
| 835 |
|
|
|
| 836 |
|
|
case IP_FREEBIND:
|
| 837 |
|
|
if (optlen<1)
|
| 838 |
|
|
goto e_inval;
|
| 839 |
|
|
sk->protinfo.af_inet.freebind = !!val;
|
| 840 |
|
|
break;
|
| 841 |
|
|
|
| 842 |
|
|
default:
|
| 843 |
|
|
#ifdef CONFIG_NETFILTER
|
| 844 |
|
|
err = nf_setsockopt(sk, PF_INET, optname, optval,
|
| 845 |
|
|
optlen);
|
| 846 |
|
|
#else
|
| 847 |
|
|
err = -ENOPROTOOPT;
|
| 848 |
|
|
#endif
|
| 849 |
|
|
break;
|
| 850 |
|
|
}
|
| 851 |
|
|
release_sock(sk);
|
| 852 |
|
|
return err;
|
| 853 |
|
|
|
| 854 |
|
|
e_inval:
|
| 855 |
|
|
release_sock(sk);
|
| 856 |
|
|
return -EINVAL;
|
| 857 |
|
|
}
|
| 858 |
|
|
|
| 859 |
|
|
/*
|
| 860 |
|
|
* Get the options. Note for future reference. The GET of IP options gets the
|
| 861 |
|
|
* _received_ ones. The set sets the _sent_ ones.
|
| 862 |
|
|
*/
|
| 863 |
|
|
|
| 864 |
|
|
int ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen)
|
| 865 |
|
|
{
|
| 866 |
|
|
int val;
|
| 867 |
|
|
int len;
|
| 868 |
|
|
|
| 869 |
|
|
if(level!=SOL_IP)
|
| 870 |
|
|
return -EOPNOTSUPP;
|
| 871 |
|
|
|
| 872 |
|
|
#ifdef CONFIG_IP_MROUTE
|
| 873 |
|
|
if(optname>=MRT_BASE && optname <=MRT_BASE+10)
|
| 874 |
|
|
{
|
| 875 |
|
|
return ip_mroute_getsockopt(sk,optname,optval,optlen);
|
| 876 |
|
|
}
|
| 877 |
|
|
#endif
|
| 878 |
|
|
|
| 879 |
|
|
if(get_user(len,optlen))
|
| 880 |
|
|
return -EFAULT;
|
| 881 |
|
|
if(len < 0)
|
| 882 |
|
|
return -EINVAL;
|
| 883 |
|
|
|
| 884 |
|
|
lock_sock(sk);
|
| 885 |
|
|
|
| 886 |
|
|
switch(optname) {
|
| 887 |
|
|
case IP_OPTIONS:
|
| 888 |
|
|
{
|
| 889 |
|
|
unsigned char optbuf[sizeof(struct ip_options)+40];
|
| 890 |
|
|
struct ip_options * opt = (struct ip_options*)optbuf;
|
| 891 |
|
|
opt->optlen = 0;
|
| 892 |
|
|
if (sk->protinfo.af_inet.opt)
|
| 893 |
|
|
memcpy(optbuf, sk->protinfo.af_inet.opt,
|
| 894 |
|
|
sizeof(struct ip_options)+
|
| 895 |
|
|
sk->protinfo.af_inet.opt->optlen);
|
| 896 |
|
|
release_sock(sk);
|
| 897 |
|
|
|
| 898 |
|
|
if (opt->optlen == 0)
|
| 899 |
|
|
return put_user(0, optlen);
|
| 900 |
|
|
|
| 901 |
|
|
ip_options_undo(opt);
|
| 902 |
|
|
|
| 903 |
|
|
len = min_t(unsigned int, len, opt->optlen);
|
| 904 |
|
|
if(put_user(len, optlen))
|
| 905 |
|
|
return -EFAULT;
|
| 906 |
|
|
if(copy_to_user(optval, opt->__data, len))
|
| 907 |
|
|
return -EFAULT;
|
| 908 |
|
|
return 0;
|
| 909 |
|
|
}
|
| 910 |
|
|
case IP_PKTINFO:
|
| 911 |
|
|
val = (sk->protinfo.af_inet.cmsg_flags & IP_CMSG_PKTINFO) != 0;
|
| 912 |
|
|
break;
|
| 913 |
|
|
case IP_RECVTTL:
|
| 914 |
|
|
val = (sk->protinfo.af_inet.cmsg_flags & IP_CMSG_TTL) != 0;
|
| 915 |
|
|
break;
|
| 916 |
|
|
case IP_RECVTOS:
|
| 917 |
|
|
val = (sk->protinfo.af_inet.cmsg_flags & IP_CMSG_TOS) != 0;
|
| 918 |
|
|
break;
|
| 919 |
|
|
case IP_RECVOPTS:
|
| 920 |
|
|
val = (sk->protinfo.af_inet.cmsg_flags & IP_CMSG_RECVOPTS) != 0;
|
| 921 |
|
|
break;
|
| 922 |
|
|
case IP_RETOPTS:
|
| 923 |
|
|
val = (sk->protinfo.af_inet.cmsg_flags & IP_CMSG_RETOPTS) != 0;
|
| 924 |
|
|
break;
|
| 925 |
|
|
case IP_TOS:
|
| 926 |
|
|
val=sk->protinfo.af_inet.tos;
|
| 927 |
|
|
break;
|
| 928 |
|
|
case IP_TTL:
|
| 929 |
|
|
val=sk->protinfo.af_inet.ttl;
|
| 930 |
|
|
break;
|
| 931 |
|
|
case IP_HDRINCL:
|
| 932 |
|
|
val=sk->protinfo.af_inet.hdrincl;
|
| 933 |
|
|
break;
|
| 934 |
|
|
case IP_MTU_DISCOVER:
|
| 935 |
|
|
val=sk->protinfo.af_inet.pmtudisc;
|
| 936 |
|
|
break;
|
| 937 |
|
|
case IP_MTU:
|
| 938 |
|
|
{
|
| 939 |
|
|
struct dst_entry *dst;
|
| 940 |
|
|
val = 0;
|
| 941 |
|
|
dst = sk_dst_get(sk);
|
| 942 |
|
|
if (dst) {
|
| 943 |
|
|
val = dst->pmtu;
|
| 944 |
|
|
dst_release(dst);
|
| 945 |
|
|
}
|
| 946 |
|
|
if (!val) {
|
| 947 |
|
|
release_sock(sk);
|
| 948 |
|
|
return -ENOTCONN;
|
| 949 |
|
|
}
|
| 950 |
|
|
break;
|
| 951 |
|
|
}
|
| 952 |
|
|
case IP_RECVERR:
|
| 953 |
|
|
val=sk->protinfo.af_inet.recverr;
|
| 954 |
|
|
break;
|
| 955 |
|
|
case IP_MULTICAST_TTL:
|
| 956 |
|
|
val=sk->protinfo.af_inet.mc_ttl;
|
| 957 |
|
|
break;
|
| 958 |
|
|
case IP_MULTICAST_LOOP:
|
| 959 |
|
|
val=sk->protinfo.af_inet.mc_loop;
|
| 960 |
|
|
break;
|
| 961 |
|
|
case IP_MULTICAST_IF:
|
| 962 |
|
|
{
|
| 963 |
|
|
struct in_addr addr;
|
| 964 |
|
|
len = min_t(unsigned int, len, sizeof(struct in_addr));
|
| 965 |
|
|
addr.s_addr = sk->protinfo.af_inet.mc_addr;
|
| 966 |
|
|
release_sock(sk);
|
| 967 |
|
|
|
| 968 |
|
|
if(put_user(len, optlen))
|
| 969 |
|
|
return -EFAULT;
|
| 970 |
|
|
if(copy_to_user((void *)optval, &addr, len))
|
| 971 |
|
|
return -EFAULT;
|
| 972 |
|
|
return 0;
|
| 973 |
|
|
}
|
| 974 |
|
|
case IP_MSFILTER:
|
| 975 |
|
|
{
|
| 976 |
|
|
struct ip_msfilter msf;
|
| 977 |
|
|
int err;
|
| 978 |
|
|
|
| 979 |
|
|
if (len < IP_MSFILTER_SIZE(0)) {
|
| 980 |
|
|
release_sock(sk);
|
| 981 |
|
|
return -EINVAL;
|
| 982 |
|
|
}
|
| 983 |
|
|
if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) {
|
| 984 |
|
|
release_sock(sk);
|
| 985 |
|
|
return -EFAULT;
|
| 986 |
|
|
}
|
| 987 |
|
|
err = ip_mc_msfget(sk, &msf,
|
| 988 |
|
|
(struct ip_msfilter *)optval, optlen);
|
| 989 |
|
|
release_sock(sk);
|
| 990 |
|
|
return err;
|
| 991 |
|
|
}
|
| 992 |
|
|
case MCAST_MSFILTER:
|
| 993 |
|
|
{
|
| 994 |
|
|
struct group_filter gsf;
|
| 995 |
|
|
int err;
|
| 996 |
|
|
|
| 997 |
|
|
if (len < GROUP_FILTER_SIZE(0)) {
|
| 998 |
|
|
release_sock(sk);
|
| 999 |
|
|
return -EINVAL;
|
| 1000 |
|
|
}
|
| 1001 |
|
|
if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) {
|
| 1002 |
|
|
release_sock(sk);
|
| 1003 |
|
|
return -EFAULT;
|
| 1004 |
|
|
}
|
| 1005 |
|
|
err = ip_mc_gsfget(sk, &gsf,
|
| 1006 |
|
|
(struct group_filter *)optval, optlen);
|
| 1007 |
|
|
release_sock(sk);
|
| 1008 |
|
|
return err;
|
| 1009 |
|
|
}
|
| 1010 |
|
|
case IP_PKTOPTIONS:
|
| 1011 |
|
|
{
|
| 1012 |
|
|
struct msghdr msg;
|
| 1013 |
|
|
|
| 1014 |
|
|
release_sock(sk);
|
| 1015 |
|
|
|
| 1016 |
|
|
if (sk->type != SOCK_STREAM)
|
| 1017 |
|
|
return -ENOPROTOOPT;
|
| 1018 |
|
|
|
| 1019 |
|
|
msg.msg_control = optval;
|
| 1020 |
|
|
msg.msg_controllen = len;
|
| 1021 |
|
|
msg.msg_flags = 0;
|
| 1022 |
|
|
|
| 1023 |
|
|
if (sk->protinfo.af_inet.cmsg_flags&IP_CMSG_PKTINFO) {
|
| 1024 |
|
|
struct in_pktinfo info;
|
| 1025 |
|
|
|
| 1026 |
|
|
info.ipi_addr.s_addr = sk->rcv_saddr;
|
| 1027 |
|
|
info.ipi_spec_dst.s_addr = sk->rcv_saddr;
|
| 1028 |
|
|
info.ipi_ifindex = sk->protinfo.af_inet.mc_index;
|
| 1029 |
|
|
put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
|
| 1030 |
|
|
}
|
| 1031 |
|
|
if (sk->protinfo.af_inet.cmsg_flags&IP_CMSG_TTL) {
|
| 1032 |
|
|
int hlim = sk->protinfo.af_inet.mc_ttl;
|
| 1033 |
|
|
put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
|
| 1034 |
|
|
}
|
| 1035 |
|
|
len -= msg.msg_controllen;
|
| 1036 |
|
|
return put_user(len, optlen);
|
| 1037 |
|
|
}
|
| 1038 |
|
|
case IP_FREEBIND:
|
| 1039 |
|
|
val = sk->protinfo.af_inet.freebind;
|
| 1040 |
|
|
break;
|
| 1041 |
|
|
default:
|
| 1042 |
|
|
#ifdef CONFIG_NETFILTER
|
| 1043 |
|
|
val = nf_getsockopt(sk, PF_INET, optname, optval,
|
| 1044 |
|
|
&len);
|
| 1045 |
|
|
release_sock(sk);
|
| 1046 |
|
|
if (val >= 0)
|
| 1047 |
|
|
val = put_user(len, optlen);
|
| 1048 |
|
|
return val;
|
| 1049 |
|
|
#else
|
| 1050 |
|
|
release_sock(sk);
|
| 1051 |
|
|
return -ENOPROTOOPT;
|
| 1052 |
|
|
#endif
|
| 1053 |
|
|
}
|
| 1054 |
|
|
release_sock(sk);
|
| 1055 |
|
|
|
| 1056 |
|
|
if (len < sizeof(int) && len > 0 && val>=0 && val<255) {
|
| 1057 |
|
|
unsigned char ucval = (unsigned char)val;
|
| 1058 |
|
|
len = 1;
|
| 1059 |
|
|
if(put_user(len, optlen))
|
| 1060 |
|
|
return -EFAULT;
|
| 1061 |
|
|
if(copy_to_user(optval,&ucval,1))
|
| 1062 |
|
|
return -EFAULT;
|
| 1063 |
|
|
} else {
|
| 1064 |
|
|
len = min_t(unsigned int, sizeof(int), len);
|
| 1065 |
|
|
if(put_user(len, optlen))
|
| 1066 |
|
|
return -EFAULT;
|
| 1067 |
|
|
if(copy_to_user(optval,&val,len))
|
| 1068 |
|
|
return -EFAULT;
|
| 1069 |
|
|
}
|
| 1070 |
|
|
return 0;
|
| 1071 |
|
|
}
|
