![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking merge from David Miller: "1) Move ixgbe driver over to purely page based buffering on receive. From Alexander Duyck. 2) Add receive packet steering support to e1000e, from Bruce Allan. 3) Convert TCP MD5 support over to RCU, from Eric Dumazet. 4) Reduce cpu usage in handling out-of-order TCP packets on modern systems, also from Eric Dumazet. 5) Support the IP{,V6}_UNICAST_IF socket options, making the wine folks happy, from Erich Hoover. 6) Support VLAN trunking from guests in hyperv driver, from Haiyang Zhang. 7) Support byte-queue-limtis in r8169, from Igor Maravic. 8) Outline code intended for IP_RECVTOS in IP_PKTOPTIONS existed but was never properly implemented, Jiri Benc fixed that. 9) 64-bit statistics support in r8169 and 8139too, from Junchang Wang. 10) Support kernel side dump filtering by ctmark in netfilter ctnetlink, from Pablo Neira Ayuso. 11) Support byte-queue-limits in gianfar driver, from Paul Gortmaker. 12) Add new peek socket options to assist with socket migration, from Pavel Emelyanov. 13) Add sch_plug packet scheduler whose queue is controlled by userland daemons using explicit freeze and release commands. From Shriram Rajagopalan. 14) Fix FCOE checksum offload handling on transmit, from Yi Zou." * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1846 commits) Fix pppol2tp getsockname() Remove printk from rds_sendmsg ipv6: fix incorrent ipv6 ipsec packet fragment cpsw: Hook up default ndo_change_mtu. net: qmi_wwan: fix build error due to cdc-wdm dependecy netdev: driver: ethernet: Add TI CPSW driver netdev: driver: ethernet: add cpsw address lookup engine support phy: add am79c874 PHY support mlx4_core: fix race on comm channel bonding: send igmp report for its master fs_enet: Add MPC5125 FEC support and PHY interface selection net: bpf_jit: fix BPF_S_LDX_B_MSH compilation net: update the usage of CHECKSUM_UNNECESSARY fcoe: use CHECKSUM_UNNECESSARY instead of CHECKSUM_PARTIAL on tx net: do not do gso for CHECKSUM_UNNECESSARY in netif_needs_gso ixgbe: Fix issues with SR-IOV loopback when flow control is disabled net/hyperv: Fix the code handling tx busy ixgbe: fix namespace issues when FCoE/DCB is not enabled rtlwifi: Remove unused ETH_ADDR_LEN defines igbvf: Use ETH_ALEN ... Fix up fairly trivial conflicts in drivers/isdn/gigaset/interface.c and drivers/net/usb/{Kconfig,qmi_wwan.c} as per David.
1388 lines
31 KiB
C
1388 lines
31 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* The IP to API glue.
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*
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* Authors: see ip.c
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*
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* Fixes:
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* Many : Split from ip.c , see ip.c for history.
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* Martin Mares : TOS setting fixed.
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* Alan Cox : Fixed a couple of oopses in Martin's
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* TOS tweaks.
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* Mike McLagan : Routing by source
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <linux/icmp.h>
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#include <linux/inetdevice.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/ip.h>
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#include <net/icmp.h>
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#include <net/tcp_states.h>
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#include <linux/udp.h>
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#include <linux/igmp.h>
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#include <linux/netfilter.h>
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#include <linux/route.h>
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#include <linux/mroute.h>
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#include <net/inet_ecn.h>
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#include <net/route.h>
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#include <net/xfrm.h>
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#include <net/compat.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <net/transp_v6.h>
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#endif
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#include <linux/errqueue.h>
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#include <asm/uaccess.h>
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#define IP_CMSG_PKTINFO 1
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#define IP_CMSG_TTL 2
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#define IP_CMSG_TOS 4
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#define IP_CMSG_RECVOPTS 8
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#define IP_CMSG_RETOPTS 16
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#define IP_CMSG_PASSSEC 32
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#define IP_CMSG_ORIGDSTADDR 64
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/*
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* SOL_IP control messages.
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*/
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#define PKTINFO_SKB_CB(__skb) ((struct in_pktinfo *)((__skb)->cb))
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static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
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{
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struct in_pktinfo info = *PKTINFO_SKB_CB(skb);
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info.ipi_addr.s_addr = ip_hdr(skb)->daddr;
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put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
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}
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static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb)
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{
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int ttl = ip_hdr(skb)->ttl;
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put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl);
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}
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static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb)
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{
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put_cmsg(msg, SOL_IP, IP_TOS, 1, &ip_hdr(skb)->tos);
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}
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static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
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{
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if (IPCB(skb)->opt.optlen == 0)
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return;
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put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen,
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ip_hdr(skb) + 1);
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}
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static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
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{
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unsigned char optbuf[sizeof(struct ip_options) + 40];
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struct ip_options * opt = (struct ip_options *)optbuf;
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if (IPCB(skb)->opt.optlen == 0)
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return;
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if (ip_options_echo(opt, skb)) {
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msg->msg_flags |= MSG_CTRUNC;
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return;
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}
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ip_options_undo(opt);
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put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data);
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}
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static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
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{
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char *secdata;
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u32 seclen, secid;
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int err;
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err = security_socket_getpeersec_dgram(NULL, skb, &secid);
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if (err)
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return;
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err = security_secid_to_secctx(secid, &secdata, &seclen);
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if (err)
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return;
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put_cmsg(msg, SOL_IP, SCM_SECURITY, seclen, secdata);
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security_release_secctx(secdata, seclen);
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}
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static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb)
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{
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struct sockaddr_in sin;
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const struct iphdr *iph = ip_hdr(skb);
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__be16 *ports = (__be16 *)skb_transport_header(skb);
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if (skb_transport_offset(skb) + 4 > skb->len)
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return;
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/* All current transport protocols have the port numbers in the
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* first four bytes of the transport header and this function is
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* written with this assumption in mind.
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*/
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = iph->daddr;
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sin.sin_port = ports[1];
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memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
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put_cmsg(msg, SOL_IP, IP_ORIGDSTADDR, sizeof(sin), &sin);
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}
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void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
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{
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struct inet_sock *inet = inet_sk(skb->sk);
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unsigned flags = inet->cmsg_flags;
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/* Ordered by supposed usage frequency */
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if (flags & 1)
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ip_cmsg_recv_pktinfo(msg, skb);
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if ((flags >>= 1) == 0)
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return;
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if (flags & 1)
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ip_cmsg_recv_ttl(msg, skb);
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if ((flags >>= 1) == 0)
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return;
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if (flags & 1)
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ip_cmsg_recv_tos(msg, skb);
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if ((flags >>= 1) == 0)
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return;
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if (flags & 1)
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ip_cmsg_recv_opts(msg, skb);
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if ((flags >>= 1) == 0)
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return;
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if (flags & 1)
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ip_cmsg_recv_retopts(msg, skb);
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if ((flags >>= 1) == 0)
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return;
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if (flags & 1)
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ip_cmsg_recv_security(msg, skb);
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if ((flags >>= 1) == 0)
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return;
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if (flags & 1)
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ip_cmsg_recv_dstaddr(msg, skb);
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}
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EXPORT_SYMBOL(ip_cmsg_recv);
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int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc)
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{
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int err;
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struct cmsghdr *cmsg;
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for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
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if (!CMSG_OK(msg, cmsg))
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return -EINVAL;
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if (cmsg->cmsg_level != SOL_IP)
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continue;
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switch (cmsg->cmsg_type) {
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case IP_RETOPTS:
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err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
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err = ip_options_get(net, &ipc->opt, CMSG_DATA(cmsg),
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err < 40 ? err : 40);
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if (err)
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return err;
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break;
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case IP_PKTINFO:
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{
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struct in_pktinfo *info;
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if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo)))
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return -EINVAL;
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info = (struct in_pktinfo *)CMSG_DATA(cmsg);
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ipc->oif = info->ipi_ifindex;
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ipc->addr = info->ipi_spec_dst.s_addr;
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break;
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}
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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/* Special input handler for packets caught by router alert option.
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They are selected only by protocol field, and then processed likely
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local ones; but only if someone wants them! Otherwise, router
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not running rsvpd will kill RSVP.
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It is user level problem, what it will make with them.
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I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
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but receiver should be enough clever f.e. to forward mtrace requests,
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sent to multicast group to reach destination designated router.
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*/
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struct ip_ra_chain __rcu *ip_ra_chain;
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static DEFINE_SPINLOCK(ip_ra_lock);
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static void ip_ra_destroy_rcu(struct rcu_head *head)
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{
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struct ip_ra_chain *ra = container_of(head, struct ip_ra_chain, rcu);
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sock_put(ra->saved_sk);
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kfree(ra);
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}
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int ip_ra_control(struct sock *sk, unsigned char on,
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void (*destructor)(struct sock *))
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{
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struct ip_ra_chain *ra, *new_ra;
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struct ip_ra_chain __rcu **rap;
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if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num == IPPROTO_RAW)
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return -EINVAL;
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new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
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spin_lock_bh(&ip_ra_lock);
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for (rap = &ip_ra_chain;
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(ra = rcu_dereference_protected(*rap,
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lockdep_is_held(&ip_ra_lock))) != NULL;
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rap = &ra->next) {
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if (ra->sk == sk) {
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if (on) {
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spin_unlock_bh(&ip_ra_lock);
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kfree(new_ra);
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return -EADDRINUSE;
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}
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/* dont let ip_call_ra_chain() use sk again */
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ra->sk = NULL;
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rcu_assign_pointer(*rap, ra->next);
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spin_unlock_bh(&ip_ra_lock);
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if (ra->destructor)
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ra->destructor(sk);
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/*
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* Delay sock_put(sk) and kfree(ra) after one rcu grace
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* period. This guarantee ip_call_ra_chain() dont need
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* to mess with socket refcounts.
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*/
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ra->saved_sk = sk;
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call_rcu(&ra->rcu, ip_ra_destroy_rcu);
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return 0;
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}
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}
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if (new_ra == NULL) {
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spin_unlock_bh(&ip_ra_lock);
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return -ENOBUFS;
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}
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new_ra->sk = sk;
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new_ra->destructor = destructor;
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new_ra->next = ra;
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rcu_assign_pointer(*rap, new_ra);
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sock_hold(sk);
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spin_unlock_bh(&ip_ra_lock);
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return 0;
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}
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void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
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__be16 port, u32 info, u8 *payload)
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{
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struct sock_exterr_skb *serr;
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skb = skb_clone(skb, GFP_ATOMIC);
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if (!skb)
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return;
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serr = SKB_EXT_ERR(skb);
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serr->ee.ee_errno = err;
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serr->ee.ee_origin = SO_EE_ORIGIN_ICMP;
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serr->ee.ee_type = icmp_hdr(skb)->type;
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serr->ee.ee_code = icmp_hdr(skb)->code;
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serr->ee.ee_pad = 0;
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serr->ee.ee_info = info;
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serr->ee.ee_data = 0;
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serr->addr_offset = (u8 *)&(((struct iphdr *)(icmp_hdr(skb) + 1))->daddr) -
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skb_network_header(skb);
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serr->port = port;
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if (skb_pull(skb, payload - skb->data) != NULL) {
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skb_reset_transport_header(skb);
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if (sock_queue_err_skb(sk, skb) == 0)
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return;
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}
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kfree_skb(skb);
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}
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void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 port, u32 info)
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{
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struct inet_sock *inet = inet_sk(sk);
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struct sock_exterr_skb *serr;
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struct iphdr *iph;
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struct sk_buff *skb;
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if (!inet->recverr)
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return;
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skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC);
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if (!skb)
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return;
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skb_put(skb, sizeof(struct iphdr));
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skb_reset_network_header(skb);
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iph = ip_hdr(skb);
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iph->daddr = daddr;
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serr = SKB_EXT_ERR(skb);
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serr->ee.ee_errno = err;
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serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
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serr->ee.ee_type = 0;
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serr->ee.ee_code = 0;
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serr->ee.ee_pad = 0;
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serr->ee.ee_info = info;
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serr->ee.ee_data = 0;
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serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb);
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serr->port = port;
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__skb_pull(skb, skb_tail_pointer(skb) - skb->data);
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skb_reset_transport_header(skb);
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if (sock_queue_err_skb(sk, skb))
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kfree_skb(skb);
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}
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/*
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* Handle MSG_ERRQUEUE
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*/
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int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
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{
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struct sock_exterr_skb *serr;
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struct sk_buff *skb, *skb2;
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struct sockaddr_in *sin;
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struct {
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struct sock_extended_err ee;
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struct sockaddr_in offender;
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} errhdr;
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int err;
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int copied;
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err = -EAGAIN;
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skb = skb_dequeue(&sk->sk_error_queue);
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if (skb == NULL)
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goto out;
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copied = skb->len;
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if (copied > len) {
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msg->msg_flags |= MSG_TRUNC;
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copied = len;
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}
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err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
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if (err)
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goto out_free_skb;
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sock_recv_timestamp(msg, sk, skb);
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serr = SKB_EXT_ERR(skb);
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sin = (struct sockaddr_in *)msg->msg_name;
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if (sin) {
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) +
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serr->addr_offset);
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sin->sin_port = serr->port;
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memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
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}
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memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
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sin = &errhdr.offender;
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sin->sin_family = AF_UNSPEC;
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if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) {
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struct inet_sock *inet = inet_sk(sk);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
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sin->sin_port = 0;
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memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
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if (inet->cmsg_flags)
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ip_cmsg_recv(msg, skb);
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}
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put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr);
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|
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/* Now we could try to dump offended packet options */
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|
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msg->msg_flags |= MSG_ERRQUEUE;
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err = copied;
|
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|
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/* Reset and regenerate socket error */
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spin_lock_bh(&sk->sk_error_queue.lock);
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sk->sk_err = 0;
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skb2 = skb_peek(&sk->sk_error_queue);
|
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if (skb2 != NULL) {
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sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
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spin_unlock_bh(&sk->sk_error_queue.lock);
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sk->sk_error_report(sk);
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} else
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spin_unlock_bh(&sk->sk_error_queue.lock);
|
|
|
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out_free_skb:
|
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kfree_skb(skb);
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out:
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return err;
|
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}
|
|
|
|
|
|
/*
|
|
* Socket option code for IP. This is the end of the line after any
|
|
* TCP,UDP etc options on an IP socket.
|
|
*/
|
|
|
|
static int do_ip_setsockopt(struct sock *sk, int level,
|
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int optname, char __user *optval, unsigned int optlen)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
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|
int val = 0, err;
|
|
|
|
if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) |
|
|
(1<<IP_RECVOPTS) | (1<<IP_RECVTOS) |
|
|
(1<<IP_RETOPTS) | (1<<IP_TOS) |
|
|
(1<<IP_TTL) | (1<<IP_HDRINCL) |
|
|
(1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
|
|
(1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) |
|
|
(1<<IP_PASSSEC) | (1<<IP_TRANSPARENT) |
|
|
(1<<IP_MINTTL) | (1<<IP_NODEFRAG))) ||
|
|
optname == IP_UNICAST_IF ||
|
|
optname == IP_MULTICAST_TTL ||
|
|
optname == IP_MULTICAST_ALL ||
|
|
optname == IP_MULTICAST_LOOP ||
|
|
optname == IP_RECVORIGDSTADDR) {
|
|
if (optlen >= sizeof(int)) {
|
|
if (get_user(val, (int __user *) optval))
|
|
return -EFAULT;
|
|
} else if (optlen >= sizeof(char)) {
|
|
unsigned char ucval;
|
|
|
|
if (get_user(ucval, (unsigned char __user *) optval))
|
|
return -EFAULT;
|
|
val = (int) ucval;
|
|
}
|
|
}
|
|
|
|
/* If optlen==0, it is equivalent to val == 0 */
|
|
|
|
if (ip_mroute_opt(optname))
|
|
return ip_mroute_setsockopt(sk, optname, optval, optlen);
|
|
|
|
err = 0;
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case IP_OPTIONS:
|
|
{
|
|
struct ip_options_rcu *old, *opt = NULL;
|
|
|
|
if (optlen > 40)
|
|
goto e_inval;
|
|
err = ip_options_get_from_user(sock_net(sk), &opt,
|
|
optval, optlen);
|
|
if (err)
|
|
break;
|
|
old = rcu_dereference_protected(inet->inet_opt,
|
|
sock_owned_by_user(sk));
|
|
if (inet->is_icsk) {
|
|
struct inet_connection_sock *icsk = inet_csk(sk);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
if (sk->sk_family == PF_INET ||
|
|
(!((1 << sk->sk_state) &
|
|
(TCPF_LISTEN | TCPF_CLOSE)) &&
|
|
inet->inet_daddr != LOOPBACK4_IPV6)) {
|
|
#endif
|
|
if (old)
|
|
icsk->icsk_ext_hdr_len -= old->opt.optlen;
|
|
if (opt)
|
|
icsk->icsk_ext_hdr_len += opt->opt.optlen;
|
|
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
}
|
|
#endif
|
|
}
|
|
rcu_assign_pointer(inet->inet_opt, opt);
|
|
if (old)
|
|
kfree_rcu(old, rcu);
|
|
break;
|
|
}
|
|
case IP_PKTINFO:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_PKTINFO;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_PKTINFO;
|
|
break;
|
|
case IP_RECVTTL:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_TTL;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_TTL;
|
|
break;
|
|
case IP_RECVTOS:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_TOS;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_TOS;
|
|
break;
|
|
case IP_RECVOPTS:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_RECVOPTS;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_RECVOPTS;
|
|
break;
|
|
case IP_RETOPTS:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_RETOPTS;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_RETOPTS;
|
|
break;
|
|
case IP_PASSSEC:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_PASSSEC;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_PASSSEC;
|
|
break;
|
|
case IP_RECVORIGDSTADDR:
|
|
if (val)
|
|
inet->cmsg_flags |= IP_CMSG_ORIGDSTADDR;
|
|
else
|
|
inet->cmsg_flags &= ~IP_CMSG_ORIGDSTADDR;
|
|
break;
|
|
case IP_TOS: /* This sets both TOS and Precedence */
|
|
if (sk->sk_type == SOCK_STREAM) {
|
|
val &= ~INET_ECN_MASK;
|
|
val |= inet->tos & INET_ECN_MASK;
|
|
}
|
|
if (inet->tos != val) {
|
|
inet->tos = val;
|
|
sk->sk_priority = rt_tos2priority(val);
|
|
sk_dst_reset(sk);
|
|
}
|
|
break;
|
|
case IP_TTL:
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
if (val != -1 && (val < 0 || val > 255))
|
|
goto e_inval;
|
|
inet->uc_ttl = val;
|
|
break;
|
|
case IP_HDRINCL:
|
|
if (sk->sk_type != SOCK_RAW) {
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
inet->hdrincl = val ? 1 : 0;
|
|
break;
|
|
case IP_NODEFRAG:
|
|
if (sk->sk_type != SOCK_RAW) {
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
inet->nodefrag = val ? 1 : 0;
|
|
break;
|
|
case IP_MTU_DISCOVER:
|
|
if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
|
|
goto e_inval;
|
|
inet->pmtudisc = val;
|
|
break;
|
|
case IP_RECVERR:
|
|
inet->recverr = !!val;
|
|
if (!val)
|
|
skb_queue_purge(&sk->sk_error_queue);
|
|
break;
|
|
case IP_MULTICAST_TTL:
|
|
if (sk->sk_type == SOCK_STREAM)
|
|
goto e_inval;
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
if (val == -1)
|
|
val = 1;
|
|
if (val < 0 || val > 255)
|
|
goto e_inval;
|
|
inet->mc_ttl = val;
|
|
break;
|
|
case IP_MULTICAST_LOOP:
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
inet->mc_loop = !!val;
|
|
break;
|
|
case IP_UNICAST_IF:
|
|
{
|
|
struct net_device *dev = NULL;
|
|
int ifindex;
|
|
|
|
if (optlen != sizeof(int))
|
|
goto e_inval;
|
|
|
|
ifindex = (__force int)ntohl((__force __be32)val);
|
|
if (ifindex == 0) {
|
|
inet->uc_index = 0;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
dev = dev_get_by_index(sock_net(sk), ifindex);
|
|
err = -EADDRNOTAVAIL;
|
|
if (!dev)
|
|
break;
|
|
dev_put(dev);
|
|
|
|
err = -EINVAL;
|
|
if (sk->sk_bound_dev_if)
|
|
break;
|
|
|
|
inet->uc_index = ifindex;
|
|
err = 0;
|
|
break;
|
|
}
|
|
case IP_MULTICAST_IF:
|
|
{
|
|
struct ip_mreqn mreq;
|
|
struct net_device *dev = NULL;
|
|
|
|
if (sk->sk_type == SOCK_STREAM)
|
|
goto e_inval;
|
|
/*
|
|
* Check the arguments are allowable
|
|
*/
|
|
|
|
if (optlen < sizeof(struct in_addr))
|
|
goto e_inval;
|
|
|
|
err = -EFAULT;
|
|
if (optlen >= sizeof(struct ip_mreqn)) {
|
|
if (copy_from_user(&mreq, optval, sizeof(mreq)))
|
|
break;
|
|
} else {
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
if (optlen >= sizeof(struct in_addr) &&
|
|
copy_from_user(&mreq.imr_address, optval,
|
|
sizeof(struct in_addr)))
|
|
break;
|
|
}
|
|
|
|
if (!mreq.imr_ifindex) {
|
|
if (mreq.imr_address.s_addr == htonl(INADDR_ANY)) {
|
|
inet->mc_index = 0;
|
|
inet->mc_addr = 0;
|
|
err = 0;
|
|
break;
|
|
}
|
|
dev = ip_dev_find(sock_net(sk), mreq.imr_address.s_addr);
|
|
if (dev)
|
|
mreq.imr_ifindex = dev->ifindex;
|
|
} else
|
|
dev = dev_get_by_index(sock_net(sk), mreq.imr_ifindex);
|
|
|
|
|
|
err = -EADDRNOTAVAIL;
|
|
if (!dev)
|
|
break;
|
|
dev_put(dev);
|
|
|
|
err = -EINVAL;
|
|
if (sk->sk_bound_dev_if &&
|
|
mreq.imr_ifindex != sk->sk_bound_dev_if)
|
|
break;
|
|
|
|
inet->mc_index = mreq.imr_ifindex;
|
|
inet->mc_addr = mreq.imr_address.s_addr;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
case IP_ADD_MEMBERSHIP:
|
|
case IP_DROP_MEMBERSHIP:
|
|
{
|
|
struct ip_mreqn mreq;
|
|
|
|
err = -EPROTO;
|
|
if (inet_sk(sk)->is_icsk)
|
|
break;
|
|
|
|
if (optlen < sizeof(struct ip_mreq))
|
|
goto e_inval;
|
|
err = -EFAULT;
|
|
if (optlen >= sizeof(struct ip_mreqn)) {
|
|
if (copy_from_user(&mreq, optval, sizeof(mreq)))
|
|
break;
|
|
} else {
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
if (copy_from_user(&mreq, optval, sizeof(struct ip_mreq)))
|
|
break;
|
|
}
|
|
|
|
if (optname == IP_ADD_MEMBERSHIP)
|
|
err = ip_mc_join_group(sk, &mreq);
|
|
else
|
|
err = ip_mc_leave_group(sk, &mreq);
|
|
break;
|
|
}
|
|
case IP_MSFILTER:
|
|
{
|
|
struct ip_msfilter *msf;
|
|
|
|
if (optlen < IP_MSFILTER_SIZE(0))
|
|
goto e_inval;
|
|
if (optlen > sysctl_optmem_max) {
|
|
err = -ENOBUFS;
|
|
break;
|
|
}
|
|
msf = kmalloc(optlen, GFP_KERNEL);
|
|
if (!msf) {
|
|
err = -ENOBUFS;
|
|
break;
|
|
}
|
|
err = -EFAULT;
|
|
if (copy_from_user(msf, optval, optlen)) {
|
|
kfree(msf);
|
|
break;
|
|
}
|
|
/* numsrc >= (1G-4) overflow in 32 bits */
|
|
if (msf->imsf_numsrc >= 0x3ffffffcU ||
|
|
msf->imsf_numsrc > sysctl_igmp_max_msf) {
|
|
kfree(msf);
|
|
err = -ENOBUFS;
|
|
break;
|
|
}
|
|
if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) {
|
|
kfree(msf);
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
err = ip_mc_msfilter(sk, msf, 0);
|
|
kfree(msf);
|
|
break;
|
|
}
|
|
case IP_BLOCK_SOURCE:
|
|
case IP_UNBLOCK_SOURCE:
|
|
case IP_ADD_SOURCE_MEMBERSHIP:
|
|
case IP_DROP_SOURCE_MEMBERSHIP:
|
|
{
|
|
struct ip_mreq_source mreqs;
|
|
int omode, add;
|
|
|
|
if (optlen != sizeof(struct ip_mreq_source))
|
|
goto e_inval;
|
|
if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
if (optname == IP_BLOCK_SOURCE) {
|
|
omode = MCAST_EXCLUDE;
|
|
add = 1;
|
|
} else if (optname == IP_UNBLOCK_SOURCE) {
|
|
omode = MCAST_EXCLUDE;
|
|
add = 0;
|
|
} else if (optname == IP_ADD_SOURCE_MEMBERSHIP) {
|
|
struct ip_mreqn mreq;
|
|
|
|
mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
|
|
mreq.imr_address.s_addr = mreqs.imr_interface;
|
|
mreq.imr_ifindex = 0;
|
|
err = ip_mc_join_group(sk, &mreq);
|
|
if (err && err != -EADDRINUSE)
|
|
break;
|
|
omode = MCAST_INCLUDE;
|
|
add = 1;
|
|
} else /* IP_DROP_SOURCE_MEMBERSHIP */ {
|
|
omode = MCAST_INCLUDE;
|
|
add = 0;
|
|
}
|
|
err = ip_mc_source(add, omode, sk, &mreqs, 0);
|
|
break;
|
|
}
|
|
case MCAST_JOIN_GROUP:
|
|
case MCAST_LEAVE_GROUP:
|
|
{
|
|
struct group_req greq;
|
|
struct sockaddr_in *psin;
|
|
struct ip_mreqn mreq;
|
|
|
|
if (optlen < sizeof(struct group_req))
|
|
goto e_inval;
|
|
err = -EFAULT;
|
|
if (copy_from_user(&greq, optval, sizeof(greq)))
|
|
break;
|
|
psin = (struct sockaddr_in *)&greq.gr_group;
|
|
if (psin->sin_family != AF_INET)
|
|
goto e_inval;
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
mreq.imr_multiaddr = psin->sin_addr;
|
|
mreq.imr_ifindex = greq.gr_interface;
|
|
|
|
if (optname == MCAST_JOIN_GROUP)
|
|
err = ip_mc_join_group(sk, &mreq);
|
|
else
|
|
err = ip_mc_leave_group(sk, &mreq);
|
|
break;
|
|
}
|
|
case MCAST_JOIN_SOURCE_GROUP:
|
|
case MCAST_LEAVE_SOURCE_GROUP:
|
|
case MCAST_BLOCK_SOURCE:
|
|
case MCAST_UNBLOCK_SOURCE:
|
|
{
|
|
struct group_source_req greqs;
|
|
struct ip_mreq_source mreqs;
|
|
struct sockaddr_in *psin;
|
|
int omode, add;
|
|
|
|
if (optlen != sizeof(struct group_source_req))
|
|
goto e_inval;
|
|
if (copy_from_user(&greqs, optval, sizeof(greqs))) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
if (greqs.gsr_group.ss_family != AF_INET ||
|
|
greqs.gsr_source.ss_family != AF_INET) {
|
|
err = -EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
psin = (struct sockaddr_in *)&greqs.gsr_group;
|
|
mreqs.imr_multiaddr = psin->sin_addr.s_addr;
|
|
psin = (struct sockaddr_in *)&greqs.gsr_source;
|
|
mreqs.imr_sourceaddr = psin->sin_addr.s_addr;
|
|
mreqs.imr_interface = 0; /* use index for mc_source */
|
|
|
|
if (optname == MCAST_BLOCK_SOURCE) {
|
|
omode = MCAST_EXCLUDE;
|
|
add = 1;
|
|
} else if (optname == MCAST_UNBLOCK_SOURCE) {
|
|
omode = MCAST_EXCLUDE;
|
|
add = 0;
|
|
} else if (optname == MCAST_JOIN_SOURCE_GROUP) {
|
|
struct ip_mreqn mreq;
|
|
|
|
psin = (struct sockaddr_in *)&greqs.gsr_group;
|
|
mreq.imr_multiaddr = psin->sin_addr;
|
|
mreq.imr_address.s_addr = 0;
|
|
mreq.imr_ifindex = greqs.gsr_interface;
|
|
err = ip_mc_join_group(sk, &mreq);
|
|
if (err && err != -EADDRINUSE)
|
|
break;
|
|
greqs.gsr_interface = mreq.imr_ifindex;
|
|
omode = MCAST_INCLUDE;
|
|
add = 1;
|
|
} else /* MCAST_LEAVE_SOURCE_GROUP */ {
|
|
omode = MCAST_INCLUDE;
|
|
add = 0;
|
|
}
|
|
err = ip_mc_source(add, omode, sk, &mreqs,
|
|
greqs.gsr_interface);
|
|
break;
|
|
}
|
|
case MCAST_MSFILTER:
|
|
{
|
|
struct sockaddr_in *psin;
|
|
struct ip_msfilter *msf = NULL;
|
|
struct group_filter *gsf = NULL;
|
|
int msize, i, ifindex;
|
|
|
|
if (optlen < GROUP_FILTER_SIZE(0))
|
|
goto e_inval;
|
|
if (optlen > sysctl_optmem_max) {
|
|
err = -ENOBUFS;
|
|
break;
|
|
}
|
|
gsf = kmalloc(optlen, GFP_KERNEL);
|
|
if (!gsf) {
|
|
err = -ENOBUFS;
|
|
break;
|
|
}
|
|
err = -EFAULT;
|
|
if (copy_from_user(gsf, optval, optlen))
|
|
goto mc_msf_out;
|
|
|
|
/* numsrc >= (4G-140)/128 overflow in 32 bits */
|
|
if (gsf->gf_numsrc >= 0x1ffffff ||
|
|
gsf->gf_numsrc > sysctl_igmp_max_msf) {
|
|
err = -ENOBUFS;
|
|
goto mc_msf_out;
|
|
}
|
|
if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
|
|
err = -EINVAL;
|
|
goto mc_msf_out;
|
|
}
|
|
msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
|
|
msf = kmalloc(msize, GFP_KERNEL);
|
|
if (!msf) {
|
|
err = -ENOBUFS;
|
|
goto mc_msf_out;
|
|
}
|
|
ifindex = gsf->gf_interface;
|
|
psin = (struct sockaddr_in *)&gsf->gf_group;
|
|
if (psin->sin_family != AF_INET) {
|
|
err = -EADDRNOTAVAIL;
|
|
goto mc_msf_out;
|
|
}
|
|
msf->imsf_multiaddr = psin->sin_addr.s_addr;
|
|
msf->imsf_interface = 0;
|
|
msf->imsf_fmode = gsf->gf_fmode;
|
|
msf->imsf_numsrc = gsf->gf_numsrc;
|
|
err = -EADDRNOTAVAIL;
|
|
for (i = 0; i < gsf->gf_numsrc; ++i) {
|
|
psin = (struct sockaddr_in *)&gsf->gf_slist[i];
|
|
|
|
if (psin->sin_family != AF_INET)
|
|
goto mc_msf_out;
|
|
msf->imsf_slist[i] = psin->sin_addr.s_addr;
|
|
}
|
|
kfree(gsf);
|
|
gsf = NULL;
|
|
|
|
err = ip_mc_msfilter(sk, msf, ifindex);
|
|
mc_msf_out:
|
|
kfree(msf);
|
|
kfree(gsf);
|
|
break;
|
|
}
|
|
case IP_MULTICAST_ALL:
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
if (val != 0 && val != 1)
|
|
goto e_inval;
|
|
inet->mc_all = val;
|
|
break;
|
|
case IP_ROUTER_ALERT:
|
|
err = ip_ra_control(sk, val ? 1 : 0, NULL);
|
|
break;
|
|
|
|
case IP_FREEBIND:
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
inet->freebind = !!val;
|
|
break;
|
|
|
|
case IP_IPSEC_POLICY:
|
|
case IP_XFRM_POLICY:
|
|
err = -EPERM;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
break;
|
|
err = xfrm_user_policy(sk, optname, optval, optlen);
|
|
break;
|
|
|
|
case IP_TRANSPARENT:
|
|
if (!!val && !capable(CAP_NET_RAW) && !capable(CAP_NET_ADMIN)) {
|
|
err = -EPERM;
|
|
break;
|
|
}
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
inet->transparent = !!val;
|
|
break;
|
|
|
|
case IP_MINTTL:
|
|
if (optlen < 1)
|
|
goto e_inval;
|
|
if (val < 0 || val > 255)
|
|
goto e_inval;
|
|
inet->min_ttl = val;
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
release_sock(sk);
|
|
return err;
|
|
|
|
e_inval:
|
|
release_sock(sk);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* ipv4_pktinfo_prepare - transfert some info from rtable to skb
|
|
* @sk: socket
|
|
* @skb: buffer
|
|
*
|
|
* To support IP_CMSG_PKTINFO option, we store rt_iif and rt_spec_dst
|
|
* in skb->cb[] before dst drop.
|
|
* This way, receiver doesnt make cache line misses to read rtable.
|
|
*/
|
|
void ipv4_pktinfo_prepare(struct sk_buff *skb)
|
|
{
|
|
struct in_pktinfo *pktinfo = PKTINFO_SKB_CB(skb);
|
|
const struct rtable *rt = skb_rtable(skb);
|
|
|
|
if (rt) {
|
|
pktinfo->ipi_ifindex = rt->rt_iif;
|
|
pktinfo->ipi_spec_dst.s_addr = rt->rt_spec_dst;
|
|
} else {
|
|
pktinfo->ipi_ifindex = 0;
|
|
pktinfo->ipi_spec_dst.s_addr = 0;
|
|
}
|
|
skb_dst_drop(skb);
|
|
}
|
|
|
|
int ip_setsockopt(struct sock *sk, int level,
|
|
int optname, char __user *optval, unsigned int optlen)
|
|
{
|
|
int err;
|
|
|
|
if (level != SOL_IP)
|
|
return -ENOPROTOOPT;
|
|
|
|
err = do_ip_setsockopt(sk, level, optname, optval, optlen);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IP_HDRINCL &&
|
|
optname != IP_IPSEC_POLICY &&
|
|
optname != IP_XFRM_POLICY &&
|
|
!ip_mroute_opt(optname)) {
|
|
lock_sock(sk);
|
|
err = nf_setsockopt(sk, PF_INET, optname, optval, optlen);
|
|
release_sock(sk);
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ip_setsockopt);
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
int compat_ip_setsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
int err;
|
|
|
|
if (level != SOL_IP)
|
|
return -ENOPROTOOPT;
|
|
|
|
if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
|
|
return compat_mc_setsockopt(sk, level, optname, optval, optlen,
|
|
ip_setsockopt);
|
|
|
|
err = do_ip_setsockopt(sk, level, optname, optval, optlen);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IP_HDRINCL &&
|
|
optname != IP_IPSEC_POLICY &&
|
|
optname != IP_XFRM_POLICY &&
|
|
!ip_mroute_opt(optname)) {
|
|
lock_sock(sk);
|
|
err = compat_nf_setsockopt(sk, PF_INET, optname,
|
|
optval, optlen);
|
|
release_sock(sk);
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(compat_ip_setsockopt);
|
|
#endif
|
|
|
|
/*
|
|
* Get the options. Note for future reference. The GET of IP options gets
|
|
* the _received_ ones. The set sets the _sent_ ones.
|
|
*/
|
|
|
|
static int do_ip_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen, unsigned flags)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
int val;
|
|
int len;
|
|
|
|
if (level != SOL_IP)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (ip_mroute_opt(optname))
|
|
return ip_mroute_getsockopt(sk, optname, optval, optlen);
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
if (len < 0)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case IP_OPTIONS:
|
|
{
|
|
unsigned char optbuf[sizeof(struct ip_options)+40];
|
|
struct ip_options *opt = (struct ip_options *)optbuf;
|
|
struct ip_options_rcu *inet_opt;
|
|
|
|
inet_opt = rcu_dereference_protected(inet->inet_opt,
|
|
sock_owned_by_user(sk));
|
|
opt->optlen = 0;
|
|
if (inet_opt)
|
|
memcpy(optbuf, &inet_opt->opt,
|
|
sizeof(struct ip_options) +
|
|
inet_opt->opt.optlen);
|
|
release_sock(sk);
|
|
|
|
if (opt->optlen == 0)
|
|
return put_user(0, optlen);
|
|
|
|
ip_options_undo(opt);
|
|
|
|
len = min_t(unsigned int, len, opt->optlen);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, opt->__data, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case IP_PKTINFO:
|
|
val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0;
|
|
break;
|
|
case IP_RECVTTL:
|
|
val = (inet->cmsg_flags & IP_CMSG_TTL) != 0;
|
|
break;
|
|
case IP_RECVTOS:
|
|
val = (inet->cmsg_flags & IP_CMSG_TOS) != 0;
|
|
break;
|
|
case IP_RECVOPTS:
|
|
val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0;
|
|
break;
|
|
case IP_RETOPTS:
|
|
val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0;
|
|
break;
|
|
case IP_PASSSEC:
|
|
val = (inet->cmsg_flags & IP_CMSG_PASSSEC) != 0;
|
|
break;
|
|
case IP_RECVORIGDSTADDR:
|
|
val = (inet->cmsg_flags & IP_CMSG_ORIGDSTADDR) != 0;
|
|
break;
|
|
case IP_TOS:
|
|
val = inet->tos;
|
|
break;
|
|
case IP_TTL:
|
|
val = (inet->uc_ttl == -1 ?
|
|
sysctl_ip_default_ttl :
|
|
inet->uc_ttl);
|
|
break;
|
|
case IP_HDRINCL:
|
|
val = inet->hdrincl;
|
|
break;
|
|
case IP_NODEFRAG:
|
|
val = inet->nodefrag;
|
|
break;
|
|
case IP_MTU_DISCOVER:
|
|
val = inet->pmtudisc;
|
|
break;
|
|
case IP_MTU:
|
|
{
|
|
struct dst_entry *dst;
|
|
val = 0;
|
|
dst = sk_dst_get(sk);
|
|
if (dst) {
|
|
val = dst_mtu(dst);
|
|
dst_release(dst);
|
|
}
|
|
if (!val) {
|
|
release_sock(sk);
|
|
return -ENOTCONN;
|
|
}
|
|
break;
|
|
}
|
|
case IP_RECVERR:
|
|
val = inet->recverr;
|
|
break;
|
|
case IP_MULTICAST_TTL:
|
|
val = inet->mc_ttl;
|
|
break;
|
|
case IP_MULTICAST_LOOP:
|
|
val = inet->mc_loop;
|
|
break;
|
|
case IP_UNICAST_IF:
|
|
val = (__force int)htonl((__u32) inet->uc_index);
|
|
break;
|
|
case IP_MULTICAST_IF:
|
|
{
|
|
struct in_addr addr;
|
|
len = min_t(unsigned int, len, sizeof(struct in_addr));
|
|
addr.s_addr = inet->mc_addr;
|
|
release_sock(sk);
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &addr, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case IP_MSFILTER:
|
|
{
|
|
struct ip_msfilter msf;
|
|
int err;
|
|
|
|
if (len < IP_MSFILTER_SIZE(0)) {
|
|
release_sock(sk);
|
|
return -EINVAL;
|
|
}
|
|
if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) {
|
|
release_sock(sk);
|
|
return -EFAULT;
|
|
}
|
|
err = ip_mc_msfget(sk, &msf,
|
|
(struct ip_msfilter __user *)optval, optlen);
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
case MCAST_MSFILTER:
|
|
{
|
|
struct group_filter gsf;
|
|
int err;
|
|
|
|
if (len < GROUP_FILTER_SIZE(0)) {
|
|
release_sock(sk);
|
|
return -EINVAL;
|
|
}
|
|
if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) {
|
|
release_sock(sk);
|
|
return -EFAULT;
|
|
}
|
|
err = ip_mc_gsfget(sk, &gsf,
|
|
(struct group_filter __user *)optval,
|
|
optlen);
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
case IP_MULTICAST_ALL:
|
|
val = inet->mc_all;
|
|
break;
|
|
case IP_PKTOPTIONS:
|
|
{
|
|
struct msghdr msg;
|
|
|
|
release_sock(sk);
|
|
|
|
if (sk->sk_type != SOCK_STREAM)
|
|
return -ENOPROTOOPT;
|
|
|
|
msg.msg_control = optval;
|
|
msg.msg_controllen = len;
|
|
msg.msg_flags = flags;
|
|
|
|
if (inet->cmsg_flags & IP_CMSG_PKTINFO) {
|
|
struct in_pktinfo info;
|
|
|
|
info.ipi_addr.s_addr = inet->inet_rcv_saddr;
|
|
info.ipi_spec_dst.s_addr = inet->inet_rcv_saddr;
|
|
info.ipi_ifindex = inet->mc_index;
|
|
put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
|
|
}
|
|
if (inet->cmsg_flags & IP_CMSG_TTL) {
|
|
int hlim = inet->mc_ttl;
|
|
put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
|
|
}
|
|
if (inet->cmsg_flags & IP_CMSG_TOS) {
|
|
int tos = inet->rcv_tos;
|
|
put_cmsg(&msg, SOL_IP, IP_TOS, sizeof(tos), &tos);
|
|
}
|
|
len -= msg.msg_controllen;
|
|
return put_user(len, optlen);
|
|
}
|
|
case IP_FREEBIND:
|
|
val = inet->freebind;
|
|
break;
|
|
case IP_TRANSPARENT:
|
|
val = inet->transparent;
|
|
break;
|
|
case IP_MINTTL:
|
|
val = inet->min_ttl;
|
|
break;
|
|
default:
|
|
release_sock(sk);
|
|
return -ENOPROTOOPT;
|
|
}
|
|
release_sock(sk);
|
|
|
|
if (len < sizeof(int) && len > 0 && val >= 0 && val <= 255) {
|
|
unsigned char ucval = (unsigned char)val;
|
|
len = 1;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &ucval, 1))
|
|
return -EFAULT;
|
|
} else {
|
|
len = min_t(unsigned int, sizeof(int), len);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ip_getsockopt(struct sock *sk, int level,
|
|
int optname, char __user *optval, int __user *optlen)
|
|
{
|
|
int err;
|
|
|
|
err = do_ip_getsockopt(sk, level, optname, optval, optlen, 0);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&
|
|
!ip_mroute_opt(optname)) {
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
err = nf_getsockopt(sk, PF_INET, optname, optval,
|
|
&len);
|
|
release_sock(sk);
|
|
if (err >= 0)
|
|
err = put_user(len, optlen);
|
|
return err;
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ip_getsockopt);
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
int compat_ip_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int err;
|
|
|
|
if (optname == MCAST_MSFILTER)
|
|
return compat_mc_getsockopt(sk, level, optname, optval, optlen,
|
|
ip_getsockopt);
|
|
|
|
err = do_ip_getsockopt(sk, level, optname, optval, optlen,
|
|
MSG_CMSG_COMPAT);
|
|
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&
|
|
!ip_mroute_opt(optname)) {
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
err = compat_nf_getsockopt(sk, PF_INET, optname, optval, &len);
|
|
release_sock(sk);
|
|
if (err >= 0)
|
|
err = put_user(len, optlen);
|
|
return err;
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(compat_ip_getsockopt);
|
|
#endif
|