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* netns: add net parameter to IP6_INC_STATSDenis V. Lunev2008-10-08
| | | | | Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: When we droped a packet, we should return NET_RX_DROP instead of 0Yang Hongyang2008-08-29
| | | | | Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: remove unused parameter from ip6_ra_controlDenis V. Lunev2008-07-19
| | | | | Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* udp: sk_drops handlingEric Dumazet2008-06-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commits 33c732c36169d7022ad7d6eb474b0c9be43a2dc1 ([IPV4]: Add raw drops counter) and a92aa318b4b369091fd80433c80e62838db8bc1c ([IPV6]: Add raw drops counter), Wang Chen added raw drops counter for /proc/net/raw & /proc/net/raw6 This patch adds this capability to UDP sockets too (/proc/net/udp & /proc/net/udp6). This means that 'RcvbufErrors' errors found in /proc/net/snmp can be also be examined for each udp socket. # grep Udp: /proc/net/snmp Udp: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors Udp: 23971006 75 899420 16390693 146348 0 # cat /proc/net/udp sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt --- uid timeout inode ref pointer drops 75: 00000000:02CB 00000000:0000 07 00000000:00000000 00:00000000 00000000 --- 0 0 2358 2 ffff81082a538c80 0 111: 00000000:006F 00000000:0000 07 00000000:00000000 00:00000000 00000000 --- 0 0 2286 2 ffff81042dd35c80 146348 In this example, only port 111 (0x006F) was flooded by messages that user program could not read fast enough. 146348 messages were lost. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: change proto destroy method to return voidBrian Haley2008-06-14
| | | | | | | | Change struct proto destroy function pointer to return void. Noticed by Al Viro. Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2008-06-13
|\ | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/smc911x.c
| * ipv6: Fix duplicate initialization of rawv6_prot.destroyDavid S. Miller2008-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In changeset 22dd485022f3d0b162ceb5e67d85de7c3806aa20 ("raw: Raw socket leak.") code was added so that we flush pending frames on raw sockets to avoid leaks. The ipv4 part was fine, but the ipv6 part was not done correctly. Unlike the ipv4 side, the ipv6 code already has a .destroy method for rawv6_prot. So now there were two assignments to this member, and what the compiler does is use the last one, effectively making the ipv6 parts of that changeset a NOP. Fix this by removing the: .destroy = inet6_destroy_sock, line, and adding an inet6_destroy_sock() call to the end of raw6_destroy(). Noticed by Al Viro. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* | net: remove CVS keywordsAdrian Bunk2008-06-12
|/ | | | | | | | This patch removes CVS keywords that weren't updated for a long time from comments. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* raw: Raw socket leak.Denis V. Lunev2008-06-04
| | | | | | | | | | | | | | | | | | | | | | | | The program below just leaks the raw kernel socket int main() { int fd = socket(PF_INET, SOCK_RAW, IPPROTO_UDP); struct sockaddr_in addr; memset(&addr, 0, sizeof(addr)); inet_aton("127.0.0.1", &addr.sin_addr); addr.sin_family = AF_INET; addr.sin_port = htons(2048); sendto(fd, "a", 1, MSG_MORE, &addr, sizeof(addr)); return 0; } Corked packet is allocated via sock_wmalloc which holds the owner socket, so one should uncork it and flush all pending data on close. Do this in the same way as in UDP. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6] NETNS: Handle ancillary data in appropriate namespace.YOSHIFUJI Hideaki2008-06-04
| | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* net: Allow netdevices to specify needed head/tailroomJohannes Berg2008-05-12
| | | | | | | | | | This patch adds needed_headroom/needed_tailroom members to struct net_device and updates many places that allocate sbks to use them. Not all of them can be converted though, and I'm sure I missed some (I mostly grepped for LL_RESERVED_SPACE) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6 RAW: Disallow IPPROTO_IPV6-level IPV6_CHECKSUM socket option on ICMPv6 ↵YOSHIFUJI Hideaki2008-04-25
| | | | | | | | | | | sockets. RFC3542 tells that IPV6_CHECKSUM socket option in the IPPROTO_IPV6 level is not allowed on ICMPv6 sockets. IPPROTO_RAW level IPV6_CHECKSUM socket option (a Linux extension) is still allowed. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: Fix IPV6_RECVERR for connected raw sockets.YOSHIFUJI Hideaki2008-04-12
| | | | | | | Based on patch from Dmitry Butskoy <buc@odusz.so-cdu.ru>. Closes: 10437 Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [IPv6]: Change IPv6 unspecified destination address to ::1 for raw and ↵Brian Haley2008-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | un-connected sockets This patch fixes a difference between IPv4 and IPv6 when sending packets to the unspecified address (either 0.0.0.0 or ::) when using raw or un-connected UDP sockets. There are two cases where IPv6 either fails to send anything, or sends with the destination address set to ::. For example: --> ping -c1 0.0.0.0 PING 0.0.0.0 (127.0.0.1) 56(84) bytes of data. 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.032 ms --> ping6 -c1 :: PING ::(::) 56 data bytes ping: sendmsg: Invalid argument Doing a sendto("0.0.0.0") reveals: 10:55:01.495090 IP localhost.32780 > localhost.7639: UDP, length 100 Doing a sendto("::") reveals: 10:56:13.262478 IP6 fe80::217:8ff:fe7d:4718.32779 > ::.7639: UDP, length 100 If you issue a connect() first in the UDP case, it will be sent to ::1, similar to what happens with TCP. This restores the BSD-ism. Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [IPV6] MROUTE: Support multicast forwarding.YOSHIFUJI Hideaki2008-04-05
| | | | | | | | Based on ancient patch by Mickael Hoerdt <hoerdt@clarinet.u-strasbg.fr>, which is available at <http://www-r2.u-strasbg.fr/~hoerdt/dev/linux_ipv6_mforwarding/patch-linux-ipv6-mforwarding-0.1a>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [IPV6] RAW: Remove ancient comment.YOSHIFUJI Hideaki2008-04-02
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SOCK]: Drop inuse pcounter from struct proto (v2).Pavel Emelyanov2008-03-28
| | | | | | | | An uppercut - do not use the pcounter on struct proto. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET] NETNS: Omit namespace comparision without CONFIG_NET_NS.YOSHIFUJI Hideaki2008-03-25
| | | | | | | | | | | Introduce an inline net_eq() to compare two namespaces. Without CONFIG_NET_NS, since no namespace other than &init_net exists, it is always 1. We do not need to convert 1) inline vs inline and 2) inline vs &init_net comparisons. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.YOSHIFUJI Hideaki2008-03-25
| | | | | | | | | Introduce per-sock inlines: sock_net(), sock_net_set() and per-inet_timewait_sock inlines: twsk_net(), twsk_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.YOSHIFUJI Hideaki2008-03-25
| | | | | | | | Introduce per-net_device inlines: dev_net(), dev_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [IPV6]: Optimize hop-limit determination.YOSHIFUJI Hideaki2008-03-24
| | | | | | | | | | | Last part of hop-limit determination is always: hoplimit = dst_metric(dst, RTAX_HOPLIMIT); if (hoplimit < 0) hoplimit = ipv6_get_hoplimit(dst->dev). Let's consolidate it as ip6_dst_hoplimit(dst). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [RAW]: Add raw_hashinfo member on struct proto.Pavel Emelyanov2008-03-22
| | | | | | | | | | | | Sorry for the patch sequence confusion :| but I found that the similar thing can be done for raw sockets easily too late. Expand the proto.h union with the raw_hashinfo member and use it in raw_prot and rawv6_prot. This allows to drop the protocol specific versions of hash and unhash callbacks. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Add debugging names to __RW_LOCK_UNLOCKED macros.Robert P. J. Day2008-03-18
| | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RAW]: Wrong content of the /proc/net/raw6.Denis V. Lunev2008-01-31
| | | | | | | | | | | | The address of IPv6 raw sockets was shown in the wrong format, from IPv4 ones. The problem has been introduced by the commit 42a73808ed4f30b739eb52bcbb33a02fe62ceef5 ("[RAW]: Consolidate proc interface.") Thanks to Adrian Bunk who originally noticed the problem. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RAW]: Family check in the /proc/net/raw[6] is extra.Denis V. Lunev2008-01-31
| | | | | | | | | Different hashtables are used for IPv6 and IPv4 raw sockets, so no need to check the socket family in the iterator over hashtables. Clean this out. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Introducing socket mark socket option.Laszlo Attila Toth2008-01-31
| | | | | | | | | | | | A userspace program may wish to set the mark for each packets its send without using the netfilter MARK target. Changing the mark can be used for mark based routing without netfilter or for packet filtering. It requires CAP_NET_ADMIN capability. Signed-off-by: Laszlo Attila Toth <panther@balabit.hu> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETNS][RAW]: Create the /proc/net/raw(6) in each namespace.Pavel Emelyanov2008-01-28
| | | | | | | | | | To do so, just register the proper subsystem and create files in ->init callbacks. No other special per-namespace handling for raw sockets is required. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETNS][RAW]: Eliminate explicit init_net references.Pavel Emelyanov2008-01-28
| | | | | | | | Happily, in all the rest places (->bind callbacks only), that require the struct net, we have a socket, so get the net from it. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETNS][RAW]: Make /proc/net/raw(6) show per-namespace socket list.Pavel Emelyanov2008-01-28
| | | | | | | | Pull the struct net pointer up to the showing functions to filter the sockets depending on their namespaces. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETNS][RAW]: Make ipv[46] raw sockets lookup namespaces aware.Pavel Emelyanov2008-01-28
| | | | | | | | | | | This requires just to pass the appropriate struct net pointer into __raw_v[46]_lookup and skip sockets that do not belong to a needed namespace. The proper net is get from skb->dev in all the cases. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETNS][IPV6]: inet6_addr - check ipv6 address per namespaceDaniel Lezcano2008-01-28
| | | | | | | | | | | | When a new address is added, we must check if the new address does not already exists. This patch makes this check to be aware of a network namespace, so the check will look if the address already exists for the specified network namespace. While the addresses are browsed, the addresses which do not belong to the namespace are discarded. Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Benjamin Thery <benjamin.thery@bull.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: fix section mismatch warningsDaniel Lezcano2008-01-28
| | | | | | | | | | Removed useless and buggy __exit section in the different ipv6 subsystems. Otherwise they will be called inside an init section during rollbacking in case of an error in the protocol initialization. Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Make callers of xfrm_lookup to use XFRM_LOOKUP_WAITHerbert Xu2008-01-28
| | | | | | | | | This patch converts all callers of xfrm_lookup that used an explicit value of 1 to indiciate blocking to use the new flag XFRM_LOOKUP_WAIT. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: make the protocol initialization to return an error codeDaniel Lezcano2008-01-28
| | | | | | | | | | | | | This patchset makes the different protocols to return an error code, so the af_inet6 module can check the initialization was correct or not. The raw6 was taken into account to be consistent with the rest of the protocols, but the registration is at the same place. Because the raw6 has its own init function, the proto and the ops structure can be moved inside the raw6.c file. Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RAW]: Consolidate proc interface.Pavel Emelyanov2008-01-28
| | | | | | | | | | | | | | | | | | | Both ipv6/raw.c and ipv4/raw.c use the seq files to walk through the raw sockets hash and show them. The "walking" code is rather huge, but is identical in both cases. The difference is the hash table to walk over and the protocol family to check (this was not in the first virsion of the patch, which was noticed by YOSHIFUJI) Make the ->open store the needed hash table and the family on the allocated raw_iter_state and make the start/next/stop callbacks work with it. This removes most of the code. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RAW]: Consolidate proto->unhash callbackPavel Emelyanov2008-01-28
| | | | | | | Same as the ->hash one, this is easily consolidated. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RAW]: Consolidate proto->hash callbackPavel Emelyanov2008-01-28
| | | | | | | | Having the raw_hashinfo it's easy to consolidate the raw[46]_hash functions. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RAW]: Introduce raw_hashinfo structurePavel Emelyanov2008-01-28
| | | | | | | | | | | | The ipv4/raw.c and ipv6/raw.c contain many common code (most of which is proc interface) which can be consolidated. Most of the places to consolidate deal with the raw sockets hashtable, so introduce a struct raw_hashinfo which describes the raw sockets hash. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPv6] RAW: Compact the API for the kernelPavel Emelyanov2008-01-28
| | | | | | | | | | | | Same as in the previous patch for ipv4, compact the API and hide hash table and rwlock inside the raw.c file. Plus fix some "bad" places from checkpatch.pl point of view (assignments inside if()). Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETFILTER]: Introduce NF_INET_ hook valuesPatrick McHardy2008-01-28
| | | | | | | | | | | The IPv4 and IPv6 hook values are identical, yet some code tries to figure out the "correct" value by looking at the address family. Introduce NF_INET_* values for both IPv4 and IPv6. The old values are kept in a #ifndef __KERNEL__ section for userspace compatibility. Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: Add raw6 drops counter.Wang Chen2008-01-28
| | | | | | | Add raw drops counter for IPv6 in /proc/net/raw6 . Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: Use the {DEFINE|REF}_PROTO_INUSE infrastructureEric Dumazet2007-11-07
| | | | | | | | | | | Trivial patch to make "tcpv6,udpv6,udplitev6,rawv6" protocols uses the fast "inuse sockets" infrastructure Each protocol use then a static percpu var, instead of a dynamic one. This saves some ram and some cpu cycles Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make core networking code use seq_open_privatePavel Emelyanov2007-10-10
| | | | | | | | | | | This concerns the ipv4 and ipv6 code mostly, but also the netlink and unix sockets. The netlink code is an example of how to use the __seq_open_private() call - it saves the net namespace on this private. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make the device list and device lookups per namespace.Eric W. Biederman2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make /proc/net per network namespaceEric W. Biederman2007-10-10
| | | | | | | | | | | | | | | | | | This patch makes /proc/net per network namespace. It modifies the global variables proc_net and proc_net_stat to be per network namespace. The proc_net file helpers are modified to take a network namespace argument, and all of their callers are fixed to pass &init_net for that argument. This ensures that all of the /proc/net files are only visible and usable in the initial network namespace until the code behind them has been updated to be handle multiple network namespaces. Making /proc/net per namespace is necessary as at least some files in /proc/net depend upon the set of network devices which is per network namespace, and even more files in /proc/net have contents that are relevant to a single network namespace. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: Fix unbalanced socket reference with MSG_CONFIRM.YOSHIFUJI Hideaki2007-09-14
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make all initialized struct seq_operations const.Philippe De Muyter2007-07-11
| | | | | | | Make all initialized struct seq_operations in net/ const Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6] MIP6: Loadable module support for MIPv6.Masahide NAKAMURA2007-07-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes MIPv6 loadable module named "mip6". Here is a modprobe.conf(5) example to load it automatically when user application uses XFRM state for MIPv6: alias xfrm-type-10-43 mip6 alias xfrm-type-10-60 mip6 Some MIPv6 feature is not included by this modular, however, it should not be affected to other features like either IPsec or IPv6 with and without the patch. We may discuss XFRM, MH (RAW socket) and ancillary data/sockopt separately for future work. Loadable features: * MH receiving check (to send ICMP error back) * RO header parsing and building (i.e. RH2 and HAO in DSTOPTS) * XFRM policy/state database handling for RO These are NOT covered as loadable: * Home Address flags and its rule on source address selection * XFRM sub policy (depends on its own kernel option) * XFRM functions to receive RO as IPv6 extension header * MH sending/receiving through raw socket if user application opens it (since raw socket allows to do so) * RH2 sending as ancillary data * RH2 operation with setsockopt(2) Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6] MIP6: Kill unnecessary ifdefs.Masahide NAKAMURA2007-07-11
| | | | | | | | | | | Kill unnecessary CONFIG_IPV6_MIP6. o It is redundant for RAW socket to keep MH out with the config then it can handle any protocol. o Clean-up at AH. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Allow packet drops during larval state resolution.David S. Miller2007-05-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current IPSEC rule resolution behavior we have does not work for a lot of people, even though technically it's an improvement from the -EAGAIN buisness we had before. Right now we'll block until the key manager resolves the route. That works for simple cases, but many folks would rather packets get silently dropped until the key manager resolves the IPSEC rules. We can't tell these folks to "set the socket non-blocking" because they don't have control over the non-block setting of things like the sockets used to resolve DNS deep inside of the resolver libraries in libc. With that in mind I coded up the patch below with some help from Herbert Xu which provides packet-drop behavior during larval state resolution, controllable via sysctl and off by default. This lays the framework to either: 1) Make this default at some point or... 2) Move this logic into xfrm{4,6}_policy.c and implement the ARP-like resolution queue we've all been dreaming of. The idea would be to queue packets to the policy, then once the larval state is resolved by the key manager we re-resolve the route and push the packets out. The packets would timeout if the rule didn't get resolved in a certain amount of time. Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 19:33:20 -0500