diff options
| author | Bin Meng <bin.meng@windriver.com> | 2020-12-11 17:35:12 +0800 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2021-01-25 17:04:56 +0800 |
| commit | f574633529926697ced51b6865e5c50bbb78bf1b (patch) | |
| tree | 98d77919083dfcbec0247c6980c479d08bc07d3b /net/checksum.c | |
| parent | d97f11590a0f60cd911ace8bb68180b5a09a068d (diff) | |
net: checksum: Introduce fine control over checksum type
At present net_checksum_calculate() blindly calculates all types of
checksums (IP, TCP, UDP). Some NICs may have a per type setting in
their BDs to control what checksum should be offloaded. To support
such hardware behavior, introduce a 'csum_flag' parameter to the
net_checksum_calculate() API to allow fine control over what type
checksum is calculated.
Existing users of this API are updated accordingly.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'net/checksum.c')
| -rw-r--r-- | net/checksum.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/net/checksum.c b/net/checksum.c index dabd290c64..70f4eaeb3a 100644 --- a/net/checksum.c +++ b/net/checksum.c @@ -57,7 +57,7 @@ uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto, return net_checksum_finish(sum); } -void net_checksum_calculate(uint8_t *data, int length) +void net_checksum_calculate(uint8_t *data, int length, int csum_flag) { int mac_hdr_len, ip_len; struct ip_header *ip; @@ -108,9 +108,11 @@ void net_checksum_calculate(uint8_t *data, int length) } /* Calculate IP checksum */ - stw_he_p(&ip->ip_sum, 0); - csum = net_raw_checksum((uint8_t *)ip, IP_HDR_GET_LEN(ip)); - stw_be_p(&ip->ip_sum, csum); + if (csum_flag & CSUM_IP) { + stw_he_p(&ip->ip_sum, 0); + csum = net_raw_checksum((uint8_t *)ip, IP_HDR_GET_LEN(ip)); + stw_be_p(&ip->ip_sum, csum); + } if (IP4_IS_FRAGMENT(ip)) { return; /* a fragmented IP packet */ @@ -128,6 +130,10 @@ void net_checksum_calculate(uint8_t *data, int length) switch (ip->ip_p) { case IP_PROTO_TCP: { + if (!(csum_flag & CSUM_TCP)) { + return; + } + tcp_header *tcp = (tcp_header *)(ip + 1); if (ip_len < sizeof(tcp_header)) { @@ -148,6 +154,10 @@ void net_checksum_calculate(uint8_t *data, int length) } case IP_PROTO_UDP: { + if (!(csum_flag & CSUM_UDP)) { + return; + } + udp_header *udp = (udp_header *)(ip + 1); if (ip_len < sizeof(udp_header)) { |