diff options
Diffstat (limited to 'core/lwip/src/include/ipv4/lwip/inet_chksum.h')
| -rw-r--r-- | core/lwip/src/include/ipv4/lwip/inet_chksum.h | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/core/lwip/src/include/ipv4/lwip/inet_chksum.h b/core/lwip/src/include/ipv4/lwip/inet_chksum.h index 5cae59cb..79a2d90f 100644 --- a/core/lwip/src/include/ipv4/lwip/inet_chksum.h +++ b/core/lwip/src/include/ipv4/lwip/inet_chksum.h @@ -37,6 +37,35 @@ #include "lwip/pbuf.h" #include "lwip/ip_addr.h" +/** Swap the bytes in an u16_t: much like htons() for little-endian */ +#ifndef SWAP_BYTES_IN_WORD +#if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) +/* little endian and PLATFORM_BYTESWAP defined */ +#define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w) +#else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */ +/* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */ +#define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8) +#endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/ +#endif /* SWAP_BYTES_IN_WORD */ + +/** Split an u32_t in two u16_ts and add them up */ +#ifndef FOLD_U32T +#define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL)) +#endif + +#if LWIP_CHECKSUM_ON_COPY +/** Function-like macro: same as MEMCPY but returns the checksum of copied data + as u16_t */ +#ifndef LWIP_CHKSUM_COPY +#define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len) +#ifndef LWIP_CHKSUM_COPY_ALGORITHM +#define LWIP_CHKSUM_COPY_ALGORITHM 1 +#endif /* LWIP_CHKSUM_COPY_ALGORITHM */ +#endif /* LWIP_CHKSUM_COPY */ +#else /* LWIP_CHECKSUM_ON_COPY */ +#define LWIP_CHKSUM_COPY_ALGORITHM 0 +#endif /* LWIP_CHECKSUM_ON_COPY */ + #ifdef __cplusplus extern "C" { #endif @@ -44,13 +73,14 @@ extern "C" { u16_t inet_chksum(void *dataptr, u16_t len); u16_t inet_chksum_pbuf(struct pbuf *p); u16_t inet_chksum_pseudo(struct pbuf *p, - struct ip_addr *src, struct ip_addr *dest, + ip_addr_t *src, ip_addr_t *dest, u8_t proto, u16_t proto_len); -#if LWIP_UDPLITE u16_t inet_chksum_pseudo_partial(struct pbuf *p, - struct ip_addr *src, struct ip_addr *dest, + ip_addr_t *src, ip_addr_t *dest, u8_t proto, u16_t proto_len, u16_t chksum_len); -#endif +#if LWIP_CHKSUM_COPY_ALGORITHM +u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len); +#endif /* LWIP_CHKSUM_COPY_ALGORITHM */ #ifdef __cplusplus } |