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* ipv4: Fix peer validation on cached lookup.David S. Miller2011-12-051-22/+13
| | | | | | | | | | | | | | | If ipv4_valdiate_peer() fails during a cached entry lookup, we'll NULL derer since the loop iterator assumes rth is not NULL. Letting this be handled as a failure is just bogus, so just make it not fail. If we have trouble getting a non-NULL neighbour for the redirected gateway, just restore the original gateway and continue. The very next use of this cached route will try again. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: make sure RTO_ONLINK is saved in routing cacheJulian Anastasov2011-12-031-6/+6
| | | | | | | | | | __mkroute_output fails to work with the original tos and uses value with stripped RTO_ONLINK bit. Make sure we put the original TOS bits into rt_key_tos because it used to match cached route. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: flush route cache after change accept_localPeter Pan(潘卫平)2011-12-011-0/+5
| | | | | | | | | After reset ipv4_devconf->data[IPV4_DEVCONF_ACCEPT_LOCAL] to 0, we should flush route cache, or it will continue receive packets with local source address, which should be dropped. Signed-off-by: Weiping Pan <panweiping3@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Revert "udp: remove redundant variable"David S. Miller2011-12-011-7/+8
| | | | | | | | | | | This reverts commit 81d54ec8479a2c695760da81f05b5a9fb2dbe40a. If we take the "try_again" goto, due to a checksum error, the 'len' has already been truncated. So we won't compute the same values as the original code did. Reported-by: paul bilke <fsmail@conspiracy.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: Perform peer validation on cached route lookup.David S. Miller2011-12-011-7/+19
| | | | | | | Otherwise we won't notice the peer GENID change. Reported-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: fix lockdep splat in rt_cache_seq_showEric Dumazet2011-11-301-2/+6
| | | | | | | | | | After commit f2c31e32b378 (fix NULL dereferences in check_peer_redir()), dst_get_neighbour() should be guarded by rcu_read_lock() / rcu_read_unlock() section. Reported-by: Miles Lane <miles.lane@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'nf' of git://1984.lsi.us.es/netDavid S. Miller2011-11-291-1/+2
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| * netfilter: possible unaligned packet header in ip_route_me_harderPaul Guo2011-11-211-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch tries to fix the following issue in netfilter: In ip_route_me_harder(), we invoke pskb_expand_head() that rellocates new header with additional head room which can break the alignment of the original packet header. In one of my NAT test case, the NIC port for internal hosts is configured with vlan and the port for external hosts is with general configuration. If we ping an external "unknown" hosts from an internal host, an icmp packet will be sent. We find that in icmp_send()->...->ip_route_me_harder()->pskb_expand_head(), hh_len=18 and current headroom (skb_headroom(skb)) of the packet is 16. After calling pskb_expand_head() the packet header becomes to be unaligned and then our system (arch/tile) panics immediately. Signed-off-by: Paul Guo <ggang@tilera.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | inet: add a redirect generation id in inetpeerEric Dumazet2011-11-261-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now inetpeer is the place where we cache redirect information for ipv4 destinations, we must be able to invalidate informations when a route is added/removed on host. As inetpeer is not yet namespace aware, this patch adds a shared redirect_genid, and a per inetpeer redirect_genid. This might be changed later if inetpeer becomes ns aware. Cache information for one inerpeer is valid as long as its redirect_genid has the same value than global redirect_genid. Reported-by: Arkadiusz Miśkiewicz <a.miskiewicz@gmail.com> Tested-by: Arkadiusz Miśkiewicz <a.miskiewicz@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4: Don't use the cached pmtu informations for input routesSteffen Klassert2011-11-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | The pmtu informations on the inetpeer are visible for output and input routes. On packet forwarding, we might propagate a learned pmtu to the sender. As we update the pmtu informations of the inetpeer on demand, the original sender of the forwarded packets might never notice when the pmtu to that inetpeer increases. So use the mtu of the outgoing device on packet forwarding instead of the pmtu to the final destination. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: Move mtu handling down to the protocol depended handlersSteffen Klassert2011-11-261-2/+9
| | | | | | | | | | | | | | | | | | We move all mtu handling from dst_mtu() down to the protocol layer. So each protocol can implement the mtu handling in a different manner. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: Rename the dst_opt default_mtu method to mtuSteffen Klassert2011-11-261-5/+5
| | | | | | | | | | | | | | | | | | We plan to invoke the dst_opt->default_mtu() method unconditioally from dst_mtu(). So rename the method to dst_opt->mtu() to match the name with the new meaning. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | route: Use the device mtu as the default for blackhole routesSteffen Klassert2011-11-261-1/+1
| | | | | | | | | | | | | | | | | | | | As it is, we return null as the default mtu of blackhole routes. This may lead to a propagation of a bogus pmtu if the default_mtu method of a blackhole route is invoked. So return dst->dev->mtu as the default mtu instead. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4: Save nexthop address of LSRR/SSRR option to IPCB.Li Wei2011-11-232-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | We can not update iph->daddr in ip_options_rcv_srr(), It is too early. When some exception ocurred later (eg. in ip_forward() when goto sr_failed) we need the ip header be identical to the original one as ICMP need it. Add a field 'nexthop' in struct ip_options to save nexthop of LSRR or SSRR option. Signed-off-by: Li Wei <lw@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4 : igmp : fix error handle in ip_mc_add_src()Jun Zhao2011-11-231-1/+2
| | | | | | | | | | | | | | | | | | | | When add sources to interface failure, need to roll back the sfcount[MODE] to before state. We need to match it corresponding. Acked-by: David L Stevens <dlstevens@us.ibm.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Jun Zhao <mypopydev@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netfilter: Remove NOTRACK/RAW dependency on NETFILTER_ADVANCED.David S. Miller2011-11-231-1/+0
| | | | | | | | | | | | | | | | Distributions are using this in their default scripts, so don't hide them behind the advanced setting. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net-netlink: fix diag to export IPv4 tos for dual-stack IPv6 socketsMaciej Żenczykowski2011-11-221-5/+9
|/ | | | | Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: fix redirect handlingEric Dumazet2011-11-181-51/+59
| | | | | | | | | | | | | | | | | | | | commit f39925dbde77 (ipv4: Cache learned redirect information in inetpeer.) introduced a regression in ICMP redirect handling. It assumed ipv4_dst_check() would be called because all possible routes were attached to the inetpeer we modify in ip_rt_redirect(), but thats not true. commit 7cc9150ebe (route: fix ICMP redirect validation) tried to fix this but solution was not complete. (It fixed only one route) So we must lookup existing routes (including different TOS values) and call check_peer_redir() on them. Reported-by: Ivan Zahariev <famzah@icdsoft.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ping: dont increment ICMP_MIB_INERRORSEric Dumazet2011-11-181-2/+0
| | | | | | | | | | | | | | | ping module incorrectly increments ICMP_MIB_INERRORS if feeded with a frame not belonging to its own sockets. RFC 2011 states that ICMP_MIB_INERRORS should count "the number of ICMP messages which the entiry received but determined as having ICMP-specific errors (bad ICMP checksums, bad length, etc.)." Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Vasiliy Kulikov <segoon@openwall.com> Acked-by: Flavio Leitner <fbl@redhat.com> Acked-by: Vasiliy Kulikov <segoon@openwall.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: clear xmit timers in tcp_v4_syn_recv_sock()Eric Dumazet2011-11-161-0/+1
| | | | | | | | | | | | | | | | | | | Simon Kirby reported divides by zero errors in __tcp_select_window() This happens when inet_csk_route_child_sock() returns a NULL pointer : We free new socket while we eventually armed keepalive timer in tcp_create_openreq_child() Fix this by a call to tcp_clear_xmit_timers() [ This is a followup to commit 918eb39962dff (net: add missing bh_unlock_sock() calls) ] Reported-by: Simon Kirby <sim@hostway.ca> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Simon Kirby <sim@hostway.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* net-netlink: Add a new attribute to expose TCLASS values via netlinkMaciej Żenczykowski2011-11-141-2/+2
| | | | | | | | | | | | | | | commit 3ceca749668a52bd795585e0f71c6f0b04814f7b added a TOS attribute. Unfortunately TOS and TCLASS are both present in a dual-stack v6 socket, furthermore they can have different values. As such one cannot in a sane way expose both through a single attribute. Signed-off-by: Maciej Żenczyowski <maze@google.com> CC: Murali Raja <muralira@google.com> CC: Stephen Hemminger <shemminger@vyatta.com> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: David S. Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ah: Don't return NET_XMIT_DROP on input.Nick Bowler2011-11-121-2/+0
| | | | | | | | | | | | When the ahash driver returns -EBUSY, AH4/6 input functions return NET_XMIT_DROP, presumably copied from the output code path. But returning transmit codes on input doesn't make a lot of sense. Since NET_XMIT_DROP is a positive int, this gets interpreted as the next header type (i.e., success). As that can only end badly, remove the check. Signed-off-by: Nick Bowler <nbowler@elliptictech.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: fix for ip_options_rcv_srr() daddr update.Li Wei2011-11-091-0/+1
| | | | | | | | | When opt->srr_is_hit is set skb_rtable(skb) has been updated for 'nexthop' and iph->daddr should always equals to skb_rtable->rt_dst holds, We need update iph->daddr either. Signed-off-by: Li Wei <lw@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ah: Read nexthdr value before overwriting it in ahash input callback.Nick Bowler2011-11-091-2/+2
| | | | | | | | | The AH4/6 ahash input callbacks read out the nexthdr field from the AH header *after* they overwrite that header. This is obviously not going to end well. Fix it up. Signed-off-by: Nick Bowler <nbowler@elliptictech.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ah: Correctly pass error codes in ahash output callback.Nick Bowler2011-11-091-2/+0
| | | | | | | | | | | | | | The AH4/6 ahash output callbacks pass nexthdr to xfrm_output_resume instead of the error code. This appears to be a copy+paste error from the input case, where nexthdr is expected. This causes the driver to continuously add AH headers to the datagram until either an allocation fails and the packet is dropped or the ahash driver hits a synchronous fallback and the resulting monstrosity is transmitted. Correct this issue by simply passing the error code unadulterated. Signed-off-by: Nick Bowler <nbowler@elliptictech.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: Fix inetpeer expire time informationSteffen Klassert2011-11-081-3/+7
| | | | | | | | | | | | As we update the learned pmtu informations on demand, we might report a nagative expiration time value to userspace if the pmtu informations are already expired and we have not send a packet to that inetpeer after expiration. With this patch we send a expire time of null to userspace after expiration until the next packet is send to that inetpeer. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: Fix comments for Nagle algorithmFeng King2011-11-081-1/+1
| | | | | | | | TCP_NODELAY is weaker than TCP_CORK, when TCP_CORK was set, small segments will always pass Nagle test regardless of TCP_NODELAY option. Signed-off-by: Feng King <kinwin2008@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds2011-11-0619-0/+19
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
| * net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modulesPaul Gortmaker2011-10-3116-0/+16
| | | | | | | | | | | | | | | | | | These files are non modular, but need to export symbols using the macros now living in export.h -- call out the include so that things won't break when we remove the implicit presence of module.h from everywhere. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * net: Fix files explicitly needing to include module.hPaul Gortmaker2011-10-313-0/+3
| | | | | | | | | | | | | | | | | | With calls to modular infrastructure, these files really needs the full module.h header. Call it out so some of the cleanups of implicit and unrequired includes elsewhere can be cleaned up. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | net: add missing bh_unlock_sock() callsEric Dumazet2011-11-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simon Kirby reported lockdep warnings and following messages : [104661.897577] huh, entered softirq 3 NET_RX ffffffff81613740 preempt_count 00000101, exited with 00000102? [104661.923653] huh, entered softirq 3 NET_RX ffffffff81613740 preempt_count 00000101, exited with 00000102? Problem comes from commit 0e734419 (ipv4: Use inet_csk_route_child_sock() in DCCP and TCP.) If inet_csk_route_child_sock() returns NULL, we should release socket lock before freeing it. Another lock imbalance exists if __inet_inherit_port() returns an error since commit 093d282321da ( tproxy: fix hash locking issue when using port redirection in __inet_inherit_port()) a backport is also needed for >= 2.6.37 kernels. Reported-by: Simon Kirby <sim@hostway.ca> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Balazs Scheidler <bazsi@balabit.hu> CC: KOVACS Krisztian <hidden@balabit.hu> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Simon Kirby <sim@hostway.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* | udp: fix a race in encap_rcv handlingEric Dumazet2011-11-021-3/+5
| | | | | | | | | | | | | | | | | | | | udp_queue_rcv_skb() has a possible race in encap_rcv handling, since this pointer can be changed anytime. We should use ACCESS_ONCE() to close the race. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: make the tcp and udp file_operations for the /proc stuff constArjan van de Ven2011-11-013-23/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | the tcp and udp code creates a set of struct file_operations at runtime while it can also be done at compile time, with the added benefit of then having these file operations be const. the trickiest part was to get the "THIS_MODULE" reference right; the naive method of declaring a struct in the place of registration would not work for this reason. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netfilter: Remove unnecessary OOM logging messagesJoe Perches2011-11-013-24/+3
| | | | | | | | | | | | | | | | | | | | Site specific OOM messages are duplications of a generic MM out of memory message and aren't really useful, so just delete them. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | ipv6: tcp: fix TCLASS value in ACK messages sent from TIME_WAITEric Dumazet2011-10-271-0/+1
|/ | | | | | | | | | | | | | | commit 66b13d99d96a (ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT) fixed IPv4 only. This part is for the IPv6 side, adding a tclass param to ip6_xmit() We alias tw_tclass and tw_tos, if socket family is INET6. [ if sockets is ipv4-mapped, only IP_TOS socket option is used to fill TOS field, TCLASS is not taken into account ] Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: avoid useless call of the function check_peer_pmtuGao feng2011-10-241-2/+1
| | | | | | | | | In func ipv4_dst_check,check_peer_pmtu should be called only when peer is updated. So,if the peer is not updated in ip_rt_frag_needed,we can not inc __rt_peer_genid. Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ra.kernel.org:/pub/scm/linux/kernel/git/davem/netDavid S. Miller2011-10-244-14/+39
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| * ipv4: fix ipsec forward performance regressionYan, Zheng2011-10-241-7/+7
| | | | | | | | | | | | | | | | | | | | There is bug in commit 5e2b61f(ipv4: Remove flowi from struct rtable). It makes xfrm4_fill_dst() modify wrong data structure. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Reported-by: Kim Phillips <kim.phillips@freescale.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * route: fix ICMP redirect validationFlavio Leitner2011-10-241-5/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit f39925dbde7788cfb96419c0f092b086aa325c0f (ipv4: Cache learned redirect information in inetpeer.) removed some ICMP packet validations which are required by RFC 1122, section 3.2.2.2: ... A Redirect message SHOULD be silently discarded if the new gateway address it specifies is not on the same connected (sub-) net through which the Redirect arrived [INTRO:2, Appendix A], or if the source of the Redirect is not the current first-hop gateway for the specified destination (see Section 3.3.1). Signed-off-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * ip_gre: dont increase dev->needed_headroom on a live deviceEric Dumazet2011-10-201-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It seems ip_gre is able to change dev->needed_headroom on the fly. Its is not legal unfortunately and triggers a BUG in raw_sendmsg() skb = sock_alloc_send_skb(sk, ... + LL_ALLOCATED_SPACE(rt->dst.dev) < another cpu change dev->needed_headromm (making it bigger) ... skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev)); We end with LL_RESERVED_SPACE() being bigger than LL_ALLOCATED_SPACE() -> we crash later because skb head is exhausted. Bug introduced in commit 243aad83 in 2.6.34 (ip_gre: include route header_len in max_headroom calculation) Reported-by: Elmar Vonlanthen <evonlanthen@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Timo Teräs <timo.teras@iki.fi> CC: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
| * tproxy: copy transparent flag when creating a time waitKOVACS Krisztian2011-10-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | The transparent socket option setting was not copied to the time wait socket when an inet socket was being replaced by a time wait socket. This broke the --transparent option of the socket match and may have caused that FIN packets belonging to sockets in FIN_WAIT2 or TIME_WAIT state were being dropped by the packet filter. Signed-off-by: KOVACS Krisztian <hidden@balabit.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
* | TCP: remove TCP_DEBUGFlavio Leitner2011-10-242-4/+0
| | | | | | | | | | | | | | | | It was enabled by default and the messages guarded by the define are useful. Signed-off-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAITEric Dumazet2011-10-243-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a long standing bug in linux tcp stack, about ACK messages sent on behalf of TIME_WAIT sockets. In the IP header of the ACK message, we choose to reflect TOS field of incoming message, and this might break some setups. Example of things that were broken : - Routing using TOS as a selector - Firewalls - Trafic classification / shaping We now remember in timewait structure the inet tos field and use it in ACK generation, and route lookup. Notes : - We still reflect incoming TOS in RST messages. - We could extend MuraliRaja Muniraju patch to report TOS value in netlink messages for TIME_WAIT sockets. - A patch is needed for IPv6 Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tcp: md5: add more const attributesEric Dumazet2011-10-241-6/+6
| | | | | | | | | | | | | | | | Now tcp_md5_hash_header() has a const tcphdr argument, we can add more const attributes to callers. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tcp: md5: dont write skb head in tcp_md5_hash_header()Eric Dumazet2011-10-241-6/+8
| | | | | | | | | | | | | | | | | | | | | | tcp_md5_hash_header() writes into skb header a temporary zero value, this might confuse other users of this area. Since tcphdr is small (20 bytes), copy it in a temporary variable and make the change in the copy. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: use INET_ECN_MASK instead of hardcoded 3Maciej Żenczykowski2011-10-221-2/+3
| | | | | | | | | | Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tcp: add const qualifiers where possibleEric Dumazet2011-10-216-114/+118
| | | | | | | | | | | | | | | | | | | | | | | | Adding const qualifiers to pointers can ease code review, and spot some bugs. It might allow compiler to optimize code further. For example, is it legal to temporary write a null cksum into tcphdr in tcp_md5_hash_header() ? I am afraid a sniffer could catch the temporary null value... Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: allow CAP_NET_RAW to set socket options IP{,V6}_TRANSPARENTMaciej Żenczykowski2011-10-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Up till now the IP{,V6}_TRANSPARENT socket options (which actually set the same bit in the socket struct) have required CAP_NET_ADMIN privileges to set or clear the option. - we make clearing the bit not require any privileges. - we allow CAP_NET_ADMIN to set the bit (as before this change) - we allow CAP_NET_RAW to set this bit, because raw sockets already pretty much effectively allow you to emulate socket transparency. Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tcp: remove unused tcp_fin() parametersEric Dumazet2011-10-201-3/+3
| | | | | | | | | | | | | | tcp_fin() only needs socket pointer, we can remove skb and th params. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tcp: use TCP_DEFAULT_INIT_RCVWND in tcp_fixup_rcvbuf()Eric Dumazet2011-10-201-8/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 356f039822b (TCP: increase default initial receive window.), we allow sender to send 10 (TCP_DEFAULT_INIT_RCVWND) segments. Change tcp_fixup_rcvbuf() to reflect this change, even if no real change is expected, since sysctl_tcp_rmem[1] = 87380 and this value is bigger than tcp_fixup_rcvbuf() computed rcvmem (~23720) Note: Since commit 356f039822b limited default window to maximum of 10*1460 and 2*MSS, we use same heuristic in this patch. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 13:43:57 +0000