diff options
Diffstat (limited to 'src/extra/udp.c')
| -rw-r--r-- | src/extra/udp.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/src/extra/udp.c b/src/extra/udp.c index 92165b4..fed23e2 100644 --- a/src/extra/udp.c +++ b/src/extra/udp.c @@ -36,6 +36,7 @@ * This function returns NULL if invalid UDP header is found. On success, * it returns the UDP header. */ +EXPORT_SYMBOL struct udphdr *nfq_udp_get_hdr(struct pkt_buff *pktb) { if (pktb->transport_header == NULL) @@ -47,13 +48,13 @@ struct udphdr *nfq_udp_get_hdr(struct pkt_buff *pktb) return (struct udphdr *)pktb->transport_header; } -EXPORT_SYMBOL(nfq_udp_get_hdr); /** * nfq_udp_get_payload - get the UDP packet payload. * \param udph: Pointer to UDP header * \param pktb: Pointer to network packet buffer */ +EXPORT_SYMBOL void *nfq_udp_get_payload(struct udphdr *udph, struct pkt_buff *pktb) { uint16_t len = ntohs(udph->len); @@ -68,18 +69,17 @@ void *nfq_udp_get_payload(struct udphdr *udph, struct pkt_buff *pktb) return pktb->transport_header + sizeof(struct udphdr); } -EXPORT_SYMBOL(nfq_udp_get_payload); /** * nfq_udp_get_payload_len - get the udp packet payload. * \param udph: Pointer to UDP header * \param pktb: Pointer to network packet buffer */ +EXPORT_SYMBOL unsigned int nfq_udp_get_payload_len(struct udphdr *udph, struct pkt_buff *pktb) { return pktb->tail - pktb->transport_header; } -EXPORT_SYMBOL(nfq_udp_get_payload_len); /** * nfq_udp_set_checksum_ipv4 - computes a IPv4/TCP packet's segment @@ -91,14 +91,13 @@ EXPORT_SYMBOL(nfq_udp_get_payload_len); * \see nfq_pkt_compute_ip_checksum * \see nfq_pkt_compute_udp_checksum */ -void -nfq_udp_compute_checksum_ipv4(struct udphdr *udph, struct iphdr *iph) +EXPORT_SYMBOL +void nfq_udp_compute_checksum_ipv4(struct udphdr *udph, struct iphdr *iph) { /* checksum field in header needs to be zero for calculation. */ udph->check = 0; udph->check = nfq_checksum_tcpudp_ipv4(iph, IPPROTO_UDP); } -EXPORT_SYMBOL(nfq_udp_compute_checksum_ipv4); /** * nfq_udp_set_checksum_ipv6 - computes a IPv6/TCP packet's segment @@ -110,14 +109,13 @@ EXPORT_SYMBOL(nfq_udp_compute_checksum_ipv4); * \see nfq_pkt_compute_ip_checksum * \see nfq_pkt_compute_udp_checksum */ -void -nfq_udp_compute_checksum_ipv6(struct udphdr *udph, struct ip6_hdr *ip6h) +EXPORT_SYMBOL +void nfq_udp_compute_checksum_ipv6(struct udphdr *udph, struct ip6_hdr *ip6h) { /* checksum field in header needs to be zero for calculation. */ udph->check = 0; udph->check = nfq_checksum_tcpudp_ipv6(ip6h, udph, IPPROTO_UDP); } -EXPORT_SYMBOL(nfq_udp_compute_checksum_ipv6); /** * nfq_udp_mangle_ipv4 - Mangle UDP/IPv4 packet buffer @@ -131,10 +129,10 @@ EXPORT_SYMBOL(nfq_udp_compute_checksum_ipv6); * \note This function updates the IPv4 and UDP lengths and recalculates their * checksums for you. */ -int -nfq_udp_mangle_ipv4(struct pkt_buff *pkt, - unsigned int match_offset, unsigned int match_len, - const char *rep_buffer, unsigned int rep_len) +EXPORT_SYMBOL +int nfq_udp_mangle_ipv4(struct pkt_buff *pkt, + unsigned int match_offset, unsigned int match_len, + const char *rep_buffer, unsigned int rep_len) { struct iphdr *iph; struct udphdr *udph; @@ -152,7 +150,6 @@ nfq_udp_mangle_ipv4(struct pkt_buff *pkt, return 1; } -EXPORT_SYMBOL(nfq_udp_mangle_ipv4); /** * nfq_pkt_snprintf_udp_hdr - print udp header into one buffer in a humnan @@ -162,12 +159,12 @@ EXPORT_SYMBOL(nfq_udp_mangle_ipv4); * \param udp: pointer to a valid udp header. * */ +EXPORT_SYMBOL int nfq_udp_snprintf(char *buf, size_t size, const struct udphdr *udph) { return snprintf(buf, size, "SPT=%u DPT=%u ", htons(udph->source), htons(udph->dest)); } -EXPORT_SYMBOL(nfq_udp_snprintf); /** * @} |