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Factor out the v4-only vs. the v6-only inp_flags processing in

Browse source 
ip6_savecontrol in preparation for udp_append() to no longer
need an WLOCK as we will no longer be modifying socket options.

Requested by:		rwatson
Reviewed by:		gnn
MFC after:		10 days
This commit is contained in:
Bjoern A. Zeeb 2008-05-24 15:20:48 +00:00
parent 60af8a6a7a
commit 9a38ba8101
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=179289
3 changed files with 37 additions and 24 deletions
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11
sys/netinet/udp_usrreq.c
View file

@ -214,14 +214,9 @@ udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
if (inp->inp_flags & INP_CONTROLOPTS ||
inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
#ifdef INET6
if (inp->inp_vflag & INP_IPV6) {
int savedflags;
savedflags = inp->inp_flags;
inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
ip6_savecontrol(inp, n, &opts);
inp->inp_flags = savedflags;
} else
if (inp->inp_vflag & INP_IPV6)
ip6_savecontrol_v4(inp, n, &opts);
else
#endif
ip_savecontrol(inp, &opts, ip, n);
}

49
sys/netinet6/ip6_input.c
View file

@ -1031,22 +1031,26 @@ ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
/*
* Create the "control" list for this pcb.
* The function will not modify mbuf chain at all.
* These functions will not modify mbuf chain at all.
*
* with KAME mbuf chain restriction:
* With KAME mbuf chain restriction:
* The routine will be called from upper layer handlers like tcp6_input().
* Thus the routine assumes that the caller (tcp6_input) have already
* called IP6_EXTHDR_CHECK() and all the extension headers are located in the
* very first mbuf on the mbuf chain.
*
* ip6_savecontrol_v4 will handle those options that are possible to be
* set on a v4-mapped socket.
* ip6_savecontrol will directly call ip6_savecontrol_v4 to handle those
* options and handle the v6-only ones itself.
*/
void
ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
int
ip6_savecontrol_v4(struct inpcb *inp, struct mbuf *m, struct mbuf **mp)
{
#define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
#ifdef SO_TIMESTAMP
if ((in6p->in6p_socket->so_options & SO_TIMESTAMP) != 0) {
if ((inp->inp_socket->so_options & SO_TIMESTAMP) != 0) {
struct timeval tv;
microtime(&tv);
@ -1058,10 +1062,11 @@ ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
#endif
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
return;
return (1);
#define IS2292(inp, x, y) (((inp)->inp_flags & IN6P_RFC2292) ? (x) : (y))
/* RFC 2292 sec. 5 */
if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
if ((inp->inp_flags & IN6P_PKTINFO) != 0) {
struct in6_pktinfo pi6;
bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
@ -1071,20 +1076,32 @@ ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
*mp = sbcreatecontrol((caddr_t) &pi6,
sizeof(struct in6_pktinfo),
IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
IS2292(inp, IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
if (*mp)
mp = &(*mp)->m_next;
}
if ((in6p->in6p_flags & IN6P_HOPLIMIT) != 0) {
if ((inp->inp_flags & IN6P_HOPLIMIT) != 0) {
int hlim = ip6->ip6_hlim & 0xff;
*mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),
IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
IS2292(inp, IPV6_2292HOPLIMIT, IPV6_HOPLIMIT),
IPPROTO_IPV6);
if (*mp)
mp = &(*mp)->m_next;
}
return (0);
}
void
ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
{
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
if (ip6_savecontrol_v4(in6p, m, mp) != 0)
return;
if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
u_int32_t flowinfo;
int tclass;
@ -1148,7 +1165,7 @@ ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
* Note: this constraint is removed in RFC3542
*/
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
IS2292(in6p, IPV6_2292HOPOPTS, IPV6_HOPOPTS),
IPPROTO_IPV6);
if (*mp)
mp = &(*mp)->m_next;
@ -1223,7 +1240,8 @@ ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
break;
*mp = sbcreatecontrol((caddr_t)ip6e, elen,
IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
IS2292(in6p,
IPV6_2292DSTOPTS, IPV6_DSTOPTS),
IPPROTO_IPV6);
if (*mp)
mp = &(*mp)->m_next;
@ -1233,7 +1251,7 @@ ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
break;
*mp = sbcreatecontrol((caddr_t)ip6e, elen,
IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
IS2292(in6p, IPV6_2292RTHDR, IPV6_RTHDR),
IPPROTO_IPV6);
if (*mp)
mp = &(*mp)->m_next;
@ -1268,9 +1286,8 @@ ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
loopend:
;
}
#undef IS2292
}
#undef IS2292
void
ip6_notify_pmtu(struct inpcb *in6p, struct sockaddr_in6 *dst, u_int32_t *mtu)

1
sys/netinet6/ip6_var.h
View file

@ -350,6 +350,7 @@ extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
u_int32_t *));
int ip6_savecontrol_v4(struct inpcb *, struct mbuf *, struct mbuf **);
void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
u_int32_t *));