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Diffstat (limited to 'framework/src/suricata/src/decode-udp.h')
| -rw-r--r-- | framework/src/suricata/src/decode-udp.h | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/framework/src/suricata/src/decode-udp.h b/framework/src/suricata/src/decode-udp.h deleted file mode 100644 index 5636c32b..00000000 --- a/framework/src/suricata/src/decode-udp.h +++ /dev/null @@ -1,193 +0,0 @@ -/* Copyright (C) 2007-2013 Open Information Security Foundation - * - * You can copy, redistribute or modify this Program under the terms of - * the GNU General Public License version 2 as published by the Free - * Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -/** - * \file - * - * \author Victor Julien <victor@inliniac.net> - */ - -#ifndef __DECODE_UDP_H__ -#define __DECODE_UDP_H__ - -#define UDP_HEADER_LEN 8 - -/* XXX RAW* needs to be really 'raw', so no ntohs there */ -#define UDP_GET_RAW_LEN(udph) ntohs((udph)->uh_len) -#define UDP_GET_RAW_SRC_PORT(udph) ntohs((udph)->uh_sport) -#define UDP_GET_RAW_DST_PORT(udph) ntohs((udph)->uh_dport) - -#define UDP_GET_LEN(p) UDP_GET_RAW_LEN(p->udph) -#define UDP_GET_SRC_PORT(p) UDP_GET_RAW_SRC_PORT(p->udph) -#define UDP_GET_DST_PORT(p) UDP_GET_RAW_DST_PORT(p->udph) - -/* UDP header structure */ -typedef struct UDPHdr_ -{ - uint16_t uh_sport; /* source port */ - uint16_t uh_dport; /* destination port */ - uint16_t uh_len; /* length */ - uint16_t uh_sum; /* checksum */ -} __attribute__((__packed__)) UDPHdr; - -typedef struct UDPVars_ -{ -} UDPVars; - -#define CLEAR_UDP_PACKET(p) do { \ - (p)->udph = NULL; \ - (p)->level4_comp_csum = -1; \ -} while (0) - -void DecodeUDPV4RegisterTests(void); - -/** ------ Inline function ------ */ -static inline uint16_t UDPV4CalculateChecksum(uint16_t *, uint16_t *, uint16_t); -static inline uint16_t UDPV6CalculateChecksum(uint16_t *, uint16_t *, uint16_t); - -/** - * \brief Calculates the checksum for the UDP packet - * - * \param shdr Pointer to source address field from the IP packet. Used as a - * part of the psuedoheader for computing the checksum - * \param pkt Pointer to the start of the UDP packet - * \param hlen Total length of the UDP packet(header + payload) - * - * \retval csum Checksum for the UDP packet - */ -static inline uint16_t UDPV4CalculateChecksum(uint16_t *shdr, uint16_t *pkt, - uint16_t tlen) -{ - uint16_t pad = 0; - uint32_t csum = shdr[0]; - - csum += shdr[1] + shdr[2] + shdr[3] + htons(17) + htons(tlen); - - csum += pkt[0] + pkt[1] + pkt[2]; - - tlen -= 8; - pkt += 4; - - while (tlen >= 32) { - csum += pkt[0] + pkt[1] + pkt[2] + pkt[3] + pkt[4] + pkt[5] + pkt[6] + - pkt[7] + pkt[8] + pkt[9] + pkt[10] + pkt[11] + pkt[12] + pkt[13] + - pkt[14] + pkt[15]; - tlen -= 32; - pkt += 16; - } - - while(tlen >= 8) { - csum += pkt[0] + pkt[1] + pkt[2] + pkt[3]; - tlen -= 8; - pkt += 4; - } - - while(tlen >= 4) { - csum += pkt[0] + pkt[1]; - tlen -= 4; - pkt += 2; - } - - while (tlen > 1) { - csum += pkt[0]; - pkt += 1; - tlen -= 2; - } - - if (tlen == 1) { - *(uint8_t *)(&pad) = (*(uint8_t *)pkt); - csum += pad; - } - - csum = (csum >> 16) + (csum & 0x0000FFFF); - csum += (csum >> 16); - - uint16_t csum_u16 = (uint16_t)~csum; - if (csum_u16 == 0) - return 0xFFFF; - else - return csum_u16; -} - -/** - * \brief Calculates the checksum for the UDP packet - * - * \param shdr Pointer to source address field from the IPV6 packet. Used as a - * part of the psuedoheader for computing the checksum - * \param pkt Pointer to the start of the UDP packet - * \param tlen Total length of the UDP packet(header + payload) - * - * \retval csum Checksum for the UDP packet - */ -static inline uint16_t UDPV6CalculateChecksum(uint16_t *shdr, uint16_t *pkt, - uint16_t tlen) -{ - uint16_t pad = 0; - uint32_t csum = shdr[0]; - - csum += shdr[1] + shdr[2] + shdr[3] + shdr[4] + shdr[5] + shdr[6] + - shdr[7] + shdr[8] + shdr[9] + shdr[10] + shdr[11] + shdr[12] + - shdr[13] + shdr[14] + shdr[15] + htons(17) + htons(tlen); - - csum += pkt[0] + pkt[1] + pkt[2]; - - tlen -= 8; - pkt += 4; - - while (tlen >= 32) { - csum += pkt[0] + pkt[1] + pkt[2] + pkt[3] + pkt[4] + pkt[5] + pkt[6] + - pkt[7] + pkt[8] + pkt[9] + pkt[10] + pkt[11] + pkt[12] + pkt[13] + - pkt[14] + pkt[15]; - tlen -= 32; - pkt += 16; - } - - while(tlen >= 8) { - csum += pkt[0] + pkt[1] + pkt[2] + pkt[3]; - tlen -= 8; - pkt += 4; - } - - while(tlen >= 4) { - csum += pkt[0] + pkt[1]; - tlen -= 4; - pkt += 2; - } - - while (tlen > 1) { - csum += pkt[0]; - pkt += 1; - tlen -= 2; - } - - if (tlen == 1) { - *(uint8_t *)(&pad) = (*(uint8_t *)pkt); - csum += pad; - } - - csum = (csum >> 16) + (csum & 0x0000FFFF); - csum += (csum >> 16); - - uint16_t csum_u16 = (uint16_t)~csum; - if (csum_u16 == 0) - return 0xFFFF; - else - return csum_u16; -} - - -#endif /* __DECODE_UDP_H__ */ |