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Patrick McHardy 4738c1db15 [SKFILTER]: Add SKF_ADF_NLATTR instruction ... SKF_ADF_NLATTR searches for a netlink attribute, which avoids manually parsing and walking attributes. It takes the offset at which to start searching in the 'A' register and the attribute type in the 'X' register and returns the offset in the 'A' register. When the attribute is not found it returns zero. A top-level attribute can be located using a filter like this (example for nfnetlink, using struct nfgenmsg): ... { /* A = offset of first attribute */ .code = BPF_LD | BPF_IMM, .k = sizeof(struct nlmsghdr) + sizeof(struct nfgenmsg) }, { /* X = CTA_PROTOINFO */ .code = BPF_LDX | BPF_IMM, .k = CTA_PROTOINFO, }, { /* A = netlink attribute offset */ .code = BPF_LD | BPF_B | BPF_ABS, .k = SKF_AD_OFF + SKF_AD_NLATTR }, { /* Exit if not found */ .code = BPF_JMP | BPF_JEQ | BPF_K, .k = 0, .jt = <error> }, ... A nested attribute below the CTA_PROTOINFO attribute would then be parsed like this: ... { /* A += sizeof(struct nlattr) */ .code = BPF_ALU | BPF_ADD | BPF_K, .k = sizeof(struct nlattr), }, { /* X = CTA_PROTOINFO_TCP */ .code = BPF_LDX | BPF_IMM, .k = CTA_PROTOINFO_TCP, }, { /* A = netlink attribute offset */ .code = BPF_LD | BPF_B | BPF_ABS, .k = SKF_AD_OFF + SKF_AD_NLATTR }, ... The data of an attribute can be loaded into 'A' like this: ... { /* X = A (attribute offset) */ .code = BPF_MISC | BPF_TAX, }, { /* A = skb->data[X + k] */ .code = BPF_LD | BPF_B | BPF_IND, .k = sizeof(struct nlattr), }, ... Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>		17 years ago
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Makefile	[NET]: Fix running without sysfs	18 years ago
datagram.c	[NET] CORE: Introducing new memory accounting interface.	17 years ago
dev.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	17 years ago
dev_mcast.c	[NET]: Use existing device list walker for /proc/dev_mcast.	17 years ago
dst.c	[NET]: uninline dst_release	17 years ago
ethtool.c	[ETHTOOL] Provide default behaviors for a few ethtool sub-ioctls	18 years ago
fib_rules.c	[NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.	17 years ago
filter.c	[SKFILTER]: Add SKF_ADF_NLATTR instruction	17 years ago
flow.c	[IPSEC] flow: reorder "struct flow_cache_entry" and remove SLAB_HWCACHE_ALIGN	17 years ago
gen_estimator.c	[NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API	17 years ago
gen_stats.c	[NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API	17 years ago
iovec.c	[PATCH] remove many unneeded #includes of sched.h	18 years ago
kmap_skb.h	[PATCH] severing skbuff.h -> highmem.h	18 years ago
link_watch.c	[NET] link_watch: Always schedule urgent events	18 years ago
neighbour.c	[NET] NEIGHBOUR: Extract hash/lookup functions for pneigh entries.	17 years ago
net-sysfs.c	[ETH]: Combine format_addr() with print_mac().	17 years ago
net-sysfs.h	[NET]: Remove in-code externs for some functions from net/core/dev.c	18 years ago
net_namespace.c	typo fixes in net/core/net_namespace.c	17 years ago
netevent.c	[NET]: net/core/netevent.c should #include <net/netevent.h>	18 years ago
netpoll.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	17 years ago
pktgen.c	[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.	17 years ago
request_sock.c	[NET] net/core/request_sock.c: Remove unused exports.	17 years ago
rtnetlink.c	[NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.	17 years ago
scm.c	[NET]: Fix function put_cmsg() which may cause usr application memory overflow	17 years ago
skbuff.c	[NET]: Fix dev_alloc_skb() typo.	17 years ago
sock.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	17 years ago
stream.c	[NET] CORE: Introducing new memory accounting interface.	17 years ago
sysctl_net_core.c	[NETNS]: Introduce a netns_core structure.	17 years ago
user_dma.c	[NET]: Revert sk_buff walker cleanups.	18 years ago
utils.c	[NET] core/utils.c: digit2bin is dead static inline	17 years ago