Man page 9 : skb_find_text

skb_find_text - Find a text pattern in skb data

unsigned int skb_find_text(struct sk_buff *  skb , unsigned int  from , unsigned int  to , struct ts_config *  config , struct ts_state *  state );

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.