diff options
Diffstat (limited to 'sys/netinet/sctp_crc32.c')
| -rw-r--r-- | sys/netinet/sctp_crc32.c | 215 |
1 files changed, 160 insertions, 55 deletions
diff --git a/sys/netinet/sctp_crc32.c b/sys/netinet/sctp_crc32.c index 7f0e742..b85ccdd 100644 --- a/sys/netinet/sctp_crc32.c +++ b/sys/netinet/sctp_crc32.c @@ -34,12 +34,16 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/uio.h> +#include <netinet/sctp.h> #include <netinet/sctp_os.h> #include <netinet/sctp_crc32.h> +#include <netinet/sctp_pcb.h> -#ifndef SCTP_USE_ADLER32 - - +#if !defined(SCTP_WITH_NO_CSUM) /** * * Routine Description: @@ -80,12 +84,14 @@ __FBSDID("$FreeBSD$"); * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o32[256] = @@ -134,12 +140,14 @@ uint32_t sctp_crc_tableil8_o32[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o40[256] = @@ -188,12 +196,14 @@ uint32_t sctp_crc_tableil8_o40[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o48[256] = @@ -242,12 +252,14 @@ uint32_t sctp_crc_tableil8_o48[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o56[256] = @@ -296,12 +308,14 @@ uint32_t sctp_crc_tableil8_o56[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o64[256] = @@ -350,12 +364,14 @@ uint32_t sctp_crc_tableil8_o64[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o72[256] = @@ -404,12 +420,14 @@ uint32_t sctp_crc_tableil8_o72[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o80[256] = @@ -458,12 +476,14 @@ uint32_t sctp_crc_tableil8_o80[256] = * The following CRC lookup table was generated automagically using the * following model parameters: * - * Generator Polynomial = ................. 0x1EDC6F41 Generator Polynomial - * Length = .......... 32 bits Reflected Bits = ....................... TRUE - * Table Generation Offset = .............. 32 bits Number of Slices = - * ..................... 8 slices Slice Lengths = ........................ 8 - * 8 8 8 8 8 8 8 Directory Name = ....................... .\ File Name = - * ............................ 8x256_tables.c + * Generator Polynomial = ................. 0x1EDC6F41 + * Generator Polynomial Length = .......... 32 bits + * Reflected Bits = ....................... TRUE + * Table Generation Offset = .............. 32 bits + * Number of Slices = ..................... 8 slices + * Slice Lengths = ........................ 8 8 8 8 8 8 8 8 + * Directory Name = ....................... .\ + * File Name = ............................ 8x256_tables.c */ uint32_t sctp_crc_tableil8_o88[256] = @@ -506,6 +526,7 @@ uint32_t sctp_crc_tableil8_o88[256] = * end of the CRC lookup table crc_tableil8_o88 */ + static uint32_t sctp_crc32c_sb8_64_bit(uint32_t crc, unsigned char *p_buf, @@ -578,7 +599,7 @@ sctp_crc32c_sb8_64_bit(uint32_t crc, * * none */ -uint32_t +static uint32_t update_crc32(uint32_t crc32c, unsigned char *buffer, unsigned int length) @@ -662,7 +683,7 @@ uint32_t sctp_crc_c[256] = { #define SCTP_CRC32C(c,d) (c=(c>>8)^sctp_crc_c[(c^(d))&0xFF]) -uint32_t +static uint32_t old_update_crc32(uint32_t crc32c, unsigned char *buffer, unsigned int length) @@ -676,8 +697,8 @@ old_update_crc32(uint32_t crc32c, } -uint32_t -sctp_csum_finalize(uint32_t crc32c) +static uint32_t +sctp_finalize_crc32(uint32_t crc32c) { uint32_t result; @@ -709,4 +730,88 @@ sctp_csum_finalize(uint32_t crc32c) return (crc32c); } +#endif /* !defined(SCTP_WITH_NO_CSUM) */ + +#if defined(SCTP_WITH_NO_CSUM) +uint32_t +sctp_calculate_cksum(struct mbuf *m, uint32_t offset) +{ + return (0); +} + +#else +uint32_t +sctp_calculate_cksum(struct mbuf *m, uint32_t offset) +{ + /* + * given a mbuf chain with a packetheader offset by 'offset' + * pointing at a sctphdr (with csum set to 0) go through the chain + * of SCTP_BUF_NEXT()'s and calculate the SCTP checksum. This also + * has a side bonus as it will calculate the total length of the + * mbuf chain. Note: if offset is greater than the total mbuf + * length, checksum=1, pktlen=0 is returned (ie. no real error code) + */ + uint32_t base = 0xffffffff; + struct mbuf *at; + + at = m; + /* find the correct mbuf and offset into mbuf */ + while ((at != NULL) && (offset > (uint32_t) SCTP_BUF_LEN(at))) { + offset -= SCTP_BUF_LEN(at); /* update remaining offset + * left */ + at = SCTP_BUF_NEXT(at); + } + while (at != NULL) { + if ((SCTP_BUF_LEN(at) - offset) > 0) { + if ((SCTP_BUF_LEN(at) - offset) < 4) { + /* Use old method if less than 4 bytes */ + base = old_update_crc32(base, + (unsigned char *)(SCTP_BUF_AT(at, offset)), + (unsigned int)(SCTP_BUF_LEN(at) - offset)); + } else { + base = update_crc32(base, + (unsigned char *)(SCTP_BUF_AT(at, offset)), + (unsigned int)(SCTP_BUF_LEN(at) - offset)); + } + /* we only offset once into the first mbuf */ + } + if (offset) { + if (offset < (uint32_t) SCTP_BUF_LEN(at)) + offset = 0; + else + offset -= SCTP_BUF_LEN(at); + } + at = SCTP_BUF_NEXT(at); + } + base = sctp_finalize_crc32(base); + return (base); +} + #endif + +void +sctp_delayed_cksum(struct mbuf *m) +{ + struct ip *ip; + uint32_t checksum; + uint32_t offset; + + ip = mtod(m, struct ip *); + offset = ip->ip_hl << 2; + checksum = sctp_calculate_cksum(m, offset); + SCTP_STAT_DECR(sctps_sendhwcrc); + SCTP_STAT_INCR(sctps_sendswcrc); + offset += offsetof(struct sctphdr, checksum); + + if (offset + sizeof(uint32_t) > (uint32_t) (m->m_len)) { + printf("delayed m_pullup, m->len: %d off: %d p: %d\n", + (uint32_t) m->m_len, offset, ip->ip_p); + /* + * XXX this shouldn't happen, but if it does, the correct + * behavior may be to insert the checksum in the appropriate + * next mbuf in the chain. + */ + return; + } + *(uint32_t *) (m->m_data + offset) = checksum; +} |
