From: Dmitry Eremin-Solenikov <dmitry.ereminsoleni...@linaro.org> Verify SCTP packet checksums. Use CRC32-c as requied by RFC3309 instead of original Adler-32.
Signed-off-by: Dmitry Eremin-Solenikov <dmitry.ereminsoleni...@linaro.org> --- /** Email created from pull request 674 (lumag:sctp-checksum) ** https://github.com/Linaro/odp/pull/674 ** Patch: https://github.com/Linaro/odp/pull/674.patch ** Base sha: dc28824415ea510e3ef62e47f7640bf4a8420fde ** Merge commit sha: b482f9618a6edb2a2f2491ee5a7af757eab93b24 **/ .../odp/api/plat/packet_inline_types.h | 7 +-- platform/linux-generic/odp_packet.c | 54 +++++++++++++++++++ 2 files changed, 58 insertions(+), 3 deletions(-) diff --git a/platform/linux-generic/include/odp/api/plat/packet_inline_types.h b/platform/linux-generic/include/odp/api/plat/packet_inline_types.h index 9a285fe4a..255102988 100644 --- a/platform/linux-generic/include/odp/api/plat/packet_inline_types.h +++ b/platform/linux-generic/include/odp/api/plat/packet_inline_types.h @@ -111,7 +111,7 @@ typedef union { uint32_t all_flags; struct { - uint32_t reserved1: 11; + uint32_t reserved1: 10; /* * Init flags @@ -135,6 +135,7 @@ typedef union { uint32_t l3_chksum_err: 1; /* L3 checksum error */ uint32_t tcp_err: 1; /* TCP error */ uint32_t udp_err: 1; /* UDP error */ + uint32_t sctp_err: 1; /* SCTP error */ uint32_t l4_chksum_err: 1; /* L4 checksum error */ uint32_t ipsec_err: 1; /* IPsec error */ uint32_t crypto_err: 1; /* Crypto packet operation error */ @@ -142,9 +143,9 @@ typedef union { /* Flag groups */ struct { - uint32_t reserved2: 11; + uint32_t reserved2: 10; uint32_t other: 13; /* All other flags */ - uint32_t error: 8; /* All error flags */ + uint32_t error: 9; /* All error flags */ } all; } _odp_packet_flags_t; diff --git a/platform/linux-generic/odp_packet.c b/platform/linux-generic/odp_packet.c index 11f8bd43d..885aec8d8 100644 --- a/platform/linux-generic/odp_packet.c +++ b/platform/linux-generic/odp_packet.c @@ -22,6 +22,7 @@ #include <protocols/eth.h> #include <protocols/ip.h> +#include <protocols/sctp.h> #include <protocols/tcp.h> #include <protocols/udp.h> @@ -2298,6 +2299,34 @@ static inline void parse_udp(packet_parser_t *prs, const uint8_t **parseptr, *parseptr += sizeof(_odp_udphdr_t); } +/** + * Parser helper function for SCTP + */ +static inline void parse_sctp(packet_parser_t *prs, const uint8_t **parseptr, + uint16_t sctp_len, + odp_proto_chksums_t chksums, + uint32_t *l4_part_sum) +{ + if (odp_unlikely(sctp_len < sizeof(_odp_sctphdr_t))) { + prs->flags.sctp_err = 1; + return; + } + + if (chksums.chksum.sctp && + !prs->input_flags.ipfrag) { + const _odp_sctphdr_t *sctp = + (const _odp_sctphdr_t *)*parseptr; + uint32_t crc = ~0; + uint32_t zero = 0; + + crc = odp_hash_crc32c(sctp, sizeof(*sctp) - 4, crc); + crc = odp_hash_crc32c(&zero, 4, crc); + *l4_part_sum = crc; + } + + *parseptr += sizeof(_odp_sctphdr_t); +} + static inline int packet_parse_common_l3_l4(packet_parser_t *prs, const uint8_t *parseptr, uint32_t offset, @@ -2388,6 +2417,8 @@ int packet_parse_common_l3_l4(packet_parser_t *prs, const uint8_t *parseptr, case _ODP_IPPROTO_SCTP: prs->input_flags.sctp = 1; + parse_sctp(prs, &parseptr, frame_len - prs->l4_offset, chksums, + l4_part_sum); break; case _ODP_IPPROTO_NO_NEXT: @@ -2626,6 +2657,29 @@ static int packet_l4_chksum(odp_packet_hdr_t *pkt_hdr, } } + if (chksums.chksum.sctp && + pkt_hdr->p.input_flags.sctp && + !pkt_hdr->p.input_flags.ipfrag) { + uint32_t sum = ~packet_sum_crc32c(pkt_hdr, + pkt_hdr->p.l4_offset + + _ODP_SCTPHDR_LEN, + pkt_hdr->frame_len - + pkt_hdr->p.l4_offset - + _ODP_SCTPHDR_LEN, + l4_part_sum); + _odp_sctphdr_t *sctp = packet_map(pkt_hdr, + pkt_hdr->p.l4_offset, + NULL, NULL); + + pkt_hdr->p.input_flags.l4_chksum_done = 1; + if (sum != sctp->chksum) { + pkt_hdr->p.flags.l4_chksum_err = 1; + pkt_hdr->p.flags.sctp_err = 1; + ODP_DBG("SCTP chksum fail (%x/%x)!\n", sum, + sctp->chksum); + } + } + return pkt_hdr->p.flags.all_flags != 0; }
