diff options
author | Thomas Graf <tgraf@suug.ch> | 2005-06-24 08:00:17 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2005-06-24 08:00:17 +0400 |
commit | 3fc7e8a6d842f72d16d2623b1022814a635ab961 (patch) | |
tree | 93f60c9af99b790c1d79bef1d3414fea3d7b9c5c /net/core/skbuff.c | |
parent | 677e90eda3bd8cfde0b748daaa46476162a03950 (diff) | |
download | linux-3fc7e8a6d842f72d16d2623b1022814a635ab961.tar.xz |
[NET]: skb_find_text() - Find a text pattern in skb data
Finds a pattern in the skb data according to the specified
textsearch configuration. Use textsearch_next() to retrieve
subsequent occurrences of the pattern. Returns the offset
to the first occurrence or UINT_MAX if no match was found.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/skbuff.c')
-rw-r--r-- | net/core/skbuff.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index d285f2f7e812..bb73b2190ec7 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1614,6 +1614,45 @@ void skb_abort_seq_read(struct skb_seq_state *st) kunmap_skb_frag(st->frag_data); } +#define TS_SKB_CB(state) ((struct skb_seq_state *) &((state)->cb)) + +static unsigned int skb_ts_get_next_block(unsigned int offset, const u8 **text, + struct ts_config *conf, + struct ts_state *state) +{ + return skb_seq_read(offset, text, TS_SKB_CB(state)); +} + +static void skb_ts_finish(struct ts_config *conf, struct ts_state *state) +{ + skb_abort_seq_read(TS_SKB_CB(state)); +} + +/** + * skb_find_text - Find a text pattern in skb data + * @skb: the buffer to look in + * @from: search offset + * @to: search limit + * @config: textsearch configuration + * @state: uninitialized textsearch state variable + * + * Finds a pattern in the skb data according to the specified + * textsearch configuration. Use textsearch_next() to retrieve + * subsequent occurrences of the pattern. Returns the offset + * to the first occurrence or UINT_MAX if no match was found. + */ +unsigned int skb_find_text(struct sk_buff *skb, unsigned int from, + unsigned int to, struct ts_config *config, + struct ts_state *state) +{ + config->get_next_block = skb_ts_get_next_block; + config->finish = skb_ts_finish; + + skb_prepare_seq_read(skb, from, to, TS_SKB_CB(state)); + + return textsearch_find(config, state); +} + void __init skb_init(void) { skbuff_head_cache = kmem_cache_create("skbuff_head_cache", @@ -1655,3 +1694,4 @@ EXPORT_SYMBOL(skb_split); EXPORT_SYMBOL(skb_prepare_seq_read); EXPORT_SYMBOL(skb_seq_read); EXPORT_SYMBOL(skb_abort_seq_read); +EXPORT_SYMBOL(skb_find_text); |