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Remove dead tcp_checksum function from net_util

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This commit is contained in:
Jon Siwek 2012-03-28 14:14:20 -05:00
parent 0ceca706f6
commit 8a1d71dc08
2 changed files with 0 additions and 28 deletions
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27
src/net_util.cc
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@ -38,33 +38,6 @@ int ones_complement_checksum(const IPAddr& a, uint32 sum)
return ones_complement_checksum(bytes, len*4, sum);
}
int tcp_checksum(const struct ip* ip, const struct tcphdr* tp, int len)
{
// ### Note, this is only correct for IPv4. This routine is only
// used by the connection compressor (which we turn off for IPv6
// traffic).
int tcp_len = tp->th_off * 4 + len;
uint32 sum;
if ( len % 2 == 1 )
// Add in pad byte.
sum = htons(((const u_char*) tp)[tcp_len - 1] << 8);
else
sum = 0;
sum = ones_complement_checksum((void*) &ip->ip_src.s_addr, 4, sum);
sum = ones_complement_checksum((void*) &ip->ip_dst.s_addr, 4, sum);
uint32 addl_pseudo =
(htons(IPPROTO_TCP) << 16) | htons((unsigned short) tcp_len);
sum = ones_complement_checksum((void*) &addl_pseudo, 4, sum);
sum = ones_complement_checksum((void*) tp, tcp_len, sum);
return sum;
}
int udp_checksum(const struct ip* ip, const struct udphdr* up, int len)
{
uint32 sum;

1
src/net_util.h
View file

@ -62,7 +62,6 @@ inline int seq_delta(uint32 a, uint32 b)
extern int ones_complement_checksum(const void* p, int b, uint32 sum);
extern int ones_complement_checksum(const IPAddr& a, uint32 sum);
extern int tcp_checksum(const struct ip* ip, const struct tcphdr* tp, int len);
extern int udp_checksum(const struct ip* ip, const struct udphdr* up, int len);
extern int udp6_checksum(const struct ip6_hdr* ip, const struct udphdr* up,
int len);