- Update prototype - Update doxygen documentation - Update declaration Signed-off-by: Duncan Roe <duncan_roe@xxxxxxxxxxxxxxx> --- include/libnetfilter_queue/pktbuff.h | 2 +- src/extra/pktbuff.c | 8 +++++--- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/include/libnetfilter_queue/pktbuff.h b/include/libnetfilter_queue/pktbuff.h index b15ee1e..5bcc3e5 100644 --- a/include/libnetfilter_queue/pktbuff.h +++ b/include/libnetfilter_queue/pktbuff.h @@ -19,7 +19,7 @@ uint8_t *pktb_mac_header(struct pkt_buff *pktb); uint8_t *pktb_network_header(struct pkt_buff *pktb); uint8_t *pktb_transport_header(struct pkt_buff *pktb); -int pktb_mangle(struct pkt_buff *pkt, unsigned int dataoff, unsigned int match_offset, unsigned int match_len, const char *rep_buffer, unsigned int rep_len); +int pktb_mangle(struct pkt_buff *pkt, int dataoff, unsigned int match_offset, unsigned int match_len, const char *rep_buffer, unsigned int rep_len); bool pktb_mangled(const struct pkt_buff *pktb); diff --git a/src/extra/pktbuff.c b/src/extra/pktbuff.c index c4f3da3..6250fbf 100644 --- a/src/extra/pktbuff.c +++ b/src/extra/pktbuff.c @@ -299,8 +299,10 @@ static int enlarge_pkt(struct pkt_buff *pkt, unsigned int extra) /** * pktb_mangle - adjust contents of a packet * \param pktb Pointer to userspace packet buffer - * \param dataoff Offset to layer 4 header. Specify zero to access layer 3 (IP) - * header (layer 2 for family \b AF_BRIDGE) + * \param dataoff Supplementary offset, usually offset from layer 3 (IP) header + * to the layer 4 (TCP or UDP) header. Specify zero to access the layer 3 + * header. If \b pktb was created in family \b AF_BRIDGE, specify + * \b -ETH_HLEN (a negative offset) to access the layer 2 (MAC) header. * \param match_offset Further offset to content that you want to mangle * \param match_len Length of the existing content you want to mangle * \param rep_buffer Pointer to data you want to use to replace current content @@ -316,7 +318,7 @@ static int enlarge_pkt(struct pkt_buff *pkt, unsigned int extra) */ EXPORT_SYMBOL int pktb_mangle(struct pkt_buff *pktb, - unsigned int dataoff, + int dataoff, unsigned int match_offset, unsigned int match_len, const char *rep_buffer, -- 2.14.5
