Signed-off-by: Asias He <asias.hejun@xxxxxxxxx>
---
tools/kvm/include/kvm/uip.h | 1 +
tools/kvm/uip/csum.c | 29 +++++++++++++++++++++++++++++
2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/include/kvm/uip.h b/tools/kvm/include/kvm/uip.h
index 979e2b0..e2ad66a 100644
--- a/tools/kvm/include/kvm/uip.h
+++ b/tools/kvm/include/kvm/uip.h
@@ -161,6 +161,7 @@ int uip_tx_do_ipv4(struct uip_tx_arg *arg);
int uip_tx_do_arp(struct uip_tx_arg *arg);
u16 uip_csum_icmp(struct uip_icmp *icmp);
+u16 uip_csum_udp(struct uip_udp *udp);
u16 uip_csum_ip(struct uip_ip *ip);
struct uip_buf *uip_buf_set_used(struct uip_info *info, struct uip_buf *buf);
diff --git a/tools/kvm/uip/csum.c b/tools/kvm/uip/csum.c
index c86bfdf..a152a0f 100644
--- a/tools/kvm/uip/csum.c
+++ b/tools/kvm/uip/csum.c
@@ -31,3 +31,32 @@ u16 uip_csum_icmp(struct uip_icmp *icmp)
ip = &icmp->ip;
return icmp->csum = uip_csum(0, &icmp->type, htons(ip->len) - uip_ip_hdrlen(ip) - 8); /* icmp header len = 8 */
}
+
+u16 uip_csum_udp(struct uip_udp *udp)
+{
+ struct uip_pseudo_hdr hdr;
+ struct uip_ip *ip;
+ int udp_len;
+ u8 *pad;
+
+ ip = &udp->ip;
+
+ hdr.sip = ip->sip;
+ hdr.dip = ip->dip;
+ hdr.zero = 0;
+ hdr.proto = ip->proto;
+ hdr.len = udp->len;
+
+ udp_len = uip_udp_len(udp);
+
+ if (udp_len % 2) {
+ pad = (u8 *)&udp->sport + udp_len;
+ *pad = 0;
+ memcpy((u8 *)&udp->sport + udp_len + 1, &hdr, sizeof(hdr));
+ return uip_csum(0, (u8 *)&udp->sport, udp_len + 1 + sizeof(hdr));
+ } else {
+ memcpy((u8 *)&udp->sport + udp_len, &hdr, sizeof(hdr));
+ return uip_csum(0, (u8 *)&udp->sport, udp_len + sizeof(hdr));
+ }
+
+}
--
1.7.5.4
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