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Don't bother null-checking the thread pointer before the prison checks

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in udp6_connect (td is already dereferenced elsewhere without such a
check).  This makes the conversion from a sockaddr to a sockaddr_in6
always happen, so convert once at the beginning of the function rather
than twice in the middle.

Approved by:	bz (mentor)
This commit is contained in:
Jamie Gritton 2009-02-05 15:04:23 +00:00
parent feabc903d9
commit 67c19233f1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=188151
1 changed files with 22 additions and 27 deletions
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49
sys/netinet6/udp6_usrreq.c
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@ -883,48 +883,43 @@ udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
{
INIT_VNET_INET(so->so_vnet);
struct inpcb *inp;
struct sockaddr_in6 *sin6;
int error;
inp = sotoinpcb(so);
sin6 = (struct sockaddr_in6 *)nam;
KASSERT(inp != NULL, ("udp6_connect: inp == NULL"));
INP_INFO_WLOCK(&V_udbinfo);
INP_WLOCK(inp);
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
struct sockaddr_in6 *sin6_p;
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
struct sockaddr_in sin;
sin6_p = (struct sockaddr_in6 *)nam;
if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
struct sockaddr_in sin;
if (inp->inp_faddr.s_addr != INADDR_ANY) {
error = EISCONN;
goto out;
}
in6_sin6_2_sin(&sin, sin6_p);
if (td && (error = prison_remote_ip4(td->td_ucred,
&sin.sin_addr)) != 0)
goto out;
error = in_pcbconnect(inp, (struct sockaddr *)&sin,
td->td_ucred);
if (error == 0) {
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
soisconnected(so);
}
if (inp->inp_faddr.s_addr != INADDR_ANY) {
error = EISCONN;
goto out;
}
in6_sin6_2_sin(&sin, sin6);
error = prison_remote_ip4(td->td_ucred, &sin.sin_addr);
if (error != 0)
goto out;
error = in_pcbconnect(inp, (struct sockaddr *)&sin,
td->td_ucred);
if (error == 0) {
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
soisconnected(so);
}
goto out;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
error = EISCONN;
goto out;
}
if (td) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
if ((error = prison_remote_ip6(td->td_ucred,
&sin6->sin6_addr)) != 0)
goto out;
}
error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr);
if (error != 0)
goto out;
error = in6_pcbconnect(inp, nam, td->td_ucred);
if (error == 0) {
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {