diff options
Diffstat (limited to 'qemu/slirp/cksum.c')
| -rw-r--r-- | qemu/slirp/cksum.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/qemu/slirp/cksum.c b/qemu/slirp/cksum.c index 63286600e..2ad0e6540 100644 --- a/qemu/slirp/cksum.c +++ b/qemu/slirp/cksum.c @@ -30,6 +30,7 @@ * in_cksum.c,v 1.2 1994/08/02 07:48:16 davidg Exp */ +#include "qemu/osdep.h" #include <slirp.h> /* @@ -137,3 +138,28 @@ cont: REDUCE; return (~sum & 0xffff); } + +int ip6_cksum(struct mbuf *m) +{ + /* TODO: Optimize this by being able to pass the ip6_pseudohdr to cksum + * separately from the mbuf */ + struct ip6 save_ip, *ip = mtod(m, struct ip6 *); + struct ip6_pseudohdr *ih = mtod(m, struct ip6_pseudohdr *); + int sum; + + save_ip = *ip; + + ih->ih_src = save_ip.ip_src; + ih->ih_dst = save_ip.ip_dst; + ih->ih_pl = htonl((uint32_t)ntohs(save_ip.ip_pl)); + ih->ih_zero_hi = 0; + ih->ih_zero_lo = 0; + ih->ih_nh = save_ip.ip_nh; + + sum = cksum(m, ((int)sizeof(struct ip6_pseudohdr)) + + ntohl(ih->ih_pl)); + + *ip = save_ip; + + return sum; +} |