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Remove some unneccessary variable sets in IPv6 code, as detected by

Browse Source 
clang's static analyzer.

Reviewed by:	bz
MFC after:	2 weeks
Sponsored by:	Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D10940
This commit is contained in:
Jonathan T. Looney 2018-03-24 12:43:34 +00:00
parent 9959c8b9e6
commit c187c03466
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=331484
4 changed files with 3 additions and 4 deletions
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2
sys/netinet6/dest6.c
View File

@ -93,7 +93,7 @@ dest6_input(struct mbuf **mp, int *offp, int proto)
opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
/* search header for all options. */
for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
for (; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
if (*opt != IP6OPT_PAD1 &&
(dstoptlen < IP6OPT_MINLEN || *(opt + 1) + 2 > dstoptlen)) {
IP6STAT_INC(ip6s_toosmall);

1
sys/netinet6/icmp6.c
View File

@ -594,7 +594,6 @@ icmp6_input(struct mbuf **mp, int *offp, int proto)
n->m_pkthdr.len = n0len + (noff - off);
n->m_next = n0;
} else {
nip6 = mtod(n, struct ip6_hdr *);
IP6_EXTHDR_GET(nicmp6, struct icmp6_hdr *, n, off,
sizeof(*nicmp6));
noff = off;

2
sys/netinet6/ip6_output.c
View File

@ -1048,7 +1048,7 @@ sendorfree:
m = m0->m_nextpkt;
m0->m_nextpkt = 0;
m_freem(m0);
for (m0 = m; m; m = m0) {
for (; m; m = m0) {
m0 = m->m_nextpkt;
m->m_nextpkt = 0;
if (error == 0) {

2
sys/netinet6/udp6_usrreq.c
View File

@ -220,7 +220,6 @@ udp6_input(struct mbuf **mp, int *offp, int proto)
uint8_t nxt;
ifp = m->m_pkthdr.rcvif;
ip6 = mtod(m, struct ip6_hdr *);
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
@ -230,6 +229,7 @@ udp6_input(struct mbuf **mp, int *offp, int proto)
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
if (!uh)
return (IPPROTO_DONE);
ip6 = mtod(m, struct ip6_hdr *);
#endif
UDPSTAT_INC(udps_ipackets);