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Simplify ip_stripoptions() reducing number of intermediate

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variables.
This commit is contained in:
Gleb Smirnoff 2012-10-23 10:29:31 +00:00
parent 8ad458a471
commit 4937a6561f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=241925
1 changed files with 4 additions and 6 deletions
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10
sys/netinet/ip_options.c
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@ -458,20 +458,18 @@ ip_srcroute(struct mbuf *m0)
void
ip_stripoptions(struct mbuf *m)
{
int i;
struct ip *ip = mtod(m, struct ip *);
caddr_t opts;
int olen;
olen = (ip->ip_hl << 2) - sizeof (struct ip);
opts = (caddr_t)(ip + 1);
i = m->m_len - (sizeof (struct ip) + olen);
bcopy(opts + olen, opts, (unsigned)i);
olen = (ip->ip_hl << 2) - sizeof(struct ip);
m->m_len -= olen;
if (m->m_flags & M_PKTHDR)
m->m_pkthdr.len -= olen;
ip->ip_len = htons(ntohs(ip->ip_len) - olen);
ip->ip_hl = sizeof(struct ip) >> 2;
bcopy((char *)ip + sizeof(struct ip) + olen, (ip + 1),
(size_t )(m->m_len - sizeof(struct ip)));
}
/*