diff options
| -rw-r--r-- | include/net/checksum.h | 14 | ||||
| -rw-r--r-- | net/checksum.c | 13 |
2 files changed, 20 insertions, 7 deletions
diff --git a/include/net/checksum.h b/include/net/checksum.h index 1f052986e6..3e7b93d094 100644 --- a/include/net/checksum.h +++ b/include/net/checksum.h @@ -20,10 +20,22 @@ #include <stdint.h> -uint32_t net_checksum_add(int len, uint8_t *buf); +uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq); uint16_t net_checksum_finish(uint32_t sum); uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto, uint8_t *addrs, uint8_t *buf); void net_checksum_calculate(uint8_t *data, int length); +static inline uint32_t +net_checksum_add(int len, uint8_t *buf) +{ + return net_checksum_add_cont(len, buf, 0); +} + +static inline uint16_t +net_raw_checksum(uint8_t *data, int length) +{ + return net_checksum_finish(net_checksum_add(length, data)); +} + #endif /* QEMU_NET_CHECKSUM_H */ diff --git a/net/checksum.c b/net/checksum.c index 9919b2e5fd..4fa5563e7c 100644 --- a/net/checksum.c +++ b/net/checksum.c @@ -20,16 +20,17 @@ #define PROTO_TCP 6 #define PROTO_UDP 17 -uint32_t net_checksum_add(int len, uint8_t *buf) +uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq) { uint32_t sum = 0; int i; - for (i = 0; i < len; i++) { - if (i & 1) - sum += (uint32_t)buf[i]; - else - sum += (uint32_t)buf[i] << 8; + for (i = seq; i < seq + len; i++) { + if (i & 1) { + sum += (uint32_t)buf[i - seq]; + } else { + sum += (uint32_t)buf[i - seq] << 8; + } } return sum; } |