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Add a new function, ifa_ifwithaddr_check(), which rather than returning

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a pointer to an ifaddr matching the passed socket address, returns a
boolean indicating whether one was present.  In the (near) future,
ifa_ifwithaddr() will return a referenced ifaddr rather than a raw
ifaddr pointer, and the new wrapper will allow callers that care only
about the boolean condition to avoid having to free that reference.

MFC after:	3 weeks
This commit is contained in:
Robert Watson 2009-06-22 10:59:34 +00:00
parent f863f9cbd9
commit 8896f83a58
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=194622
7 changed files with 25 additions and 9 deletions
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7
sys/dev/cxgb/ulp/iw_cxgb/iw_cxgb_cm.c
View File

@ -1337,12 +1337,13 @@ static int
is_loopback_dst(struct iw_cm_id *cm_id)
{
uint16_t port = cm_id->remote_addr.sin_port;
struct ifaddr *ifa;
int ifa_present;
cm_id->remote_addr.sin_port = 0;
ifa = ifa_ifwithaddr((struct sockaddr *)&cm_id->remote_addr);
ifa_present = ifa_ifwithaddr_check(
(struct sockaddr *)&cm_id->remote_addr);
cm_id->remote_addr.sin_port = port;
return (ifa != NULL);
return (ifa_present);
}
int

18
sys/net/if.c
View File

@ -1466,8 +1466,8 @@ ifa_free(struct ifaddr *ifa)
* Locate an interface based on a complete address.
*/
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithaddr(struct sockaddr *addr)
static struct ifaddr *
ifa_ifwithaddr_internal(struct sockaddr *addr)
{
INIT_VNET_NET(curvnet);
struct ifnet *ifp;
@ -1500,6 +1500,20 @@ ifa_ifwithaddr(struct sockaddr *addr)
return (ifa);
}
struct ifaddr *
ifa_ifwithaddr(struct sockaddr *addr)
{
return (ifa_ifwithaddr_internal(addr));
}
int
ifa_ifwithaddr_check(struct sockaddr *addr)
{
return (ifa_ifwithaddr_internal(addr) != NULL);
}
/*
* Locate an interface based on the broadcast address.
*/

1
sys/net/if_var.h
View File

@ -820,6 +820,7 @@ void ifq_init(struct ifaltq *, struct ifnet *ifp);
void ifq_delete(struct ifaltq *);
struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
int ifa_ifwithaddr_check(struct sockaddr *);
struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
struct ifaddr *ifa_ifwithnet(struct sockaddr *);

2
sys/net/route.c
View File

@ -547,7 +547,7 @@ rtredirect_fib(struct sockaddr *dst,
if (!(flags & RTF_DONE) && rt &&
(!sa_equal(src, rt->rt_gateway) || rt->rt_ifa != ifa))
error = EINVAL;
else if (ifa_ifwithaddr(gateway))
else if (ifa_ifwithaddr_check(gateway))
error = EHOSTUNREACH;
if (error)
goto done;

2
sys/netinet/in_pcb.c
View File

@ -357,7 +357,7 @@ in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
* to any endpoint address, local or not.
*/
if ((inp->inp_flags & INP_BINDANY) == 0 &&
ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
ifa_ifwithaddr_check((struct sockaddr *)sin) == 0)
return (EADDRNOTAVAIL);
}
laddr = sin->sin_addr;

2
sys/netinet/raw_ip.c
View File

@ -875,7 +875,7 @@ rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
(addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) ||
(addr->sin_addr.s_addr &&
(inp->inp_flags & INP_BINDANY) == 0 &&
ifa_ifwithaddr((struct sockaddr *)addr) == NULL))
ifa_ifwithaddr_check((struct sockaddr *)addr) == 0))
return (EADDRNOTAVAIL);
INP_INFO_WLOCK(&V_ripcbinfo);

2
sys/netipx/ipx_pcb.c
View File

@ -121,7 +121,7 @@ ipx_pcbbind(struct ipxpcb *ipxp, struct sockaddr *nam, struct thread *td)
int tport = sipx->sipx_port;
sipx->sipx_port = 0; /* yech... */
if (ifa_ifwithaddr((struct sockaddr *)sipx) == NULL)
if (ifa_ifwithaddr_check((struct sockaddr *)sipx) == 0)
return (EADDRNOTAVAIL);
sipx->sipx_port = tport;
}