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Simplify to bitmaskcmp() to use the obvious approach instead of

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comparing bit by bit.

Make the logic in in6_fillscopeid() match that in our ifconfig(8):
only set the scope ID if there is one in the address and none in
sin6_scope_id.

Correct a comment in network_init() that didn't make sense; it was
probably never updated after it was pasted from similar code in
addrmerge().
This commit is contained in:
Ian Dowse 2001-07-14 17:04:26 +00:00
parent 9510612d41
commit e8418b515c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=79720
1 changed files with 19 additions and 22 deletions
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41
usr.sbin/rpcbind/util.c
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@ -77,40 +77,38 @@ static void in6_fillscopeid __P((struct sockaddr_in6 *));
/*
* For all bits set in "mask", compare the corresponding bits in
* "dst" and "src", and see if they match.
* "dst" and "src", and see if they match. Returns 0 if the addresses
* match.
*/
static int
bitmaskcmp(void *dst, void *src, void *mask, int bytelen)
{
int i, j;
int i;
u_int8_t *p1 = dst, *p2 = src, *netmask = mask;
u_int8_t bitmask;
for (i = 0; i < bytelen; i++) {
for (j = 0; j < 8; j++) {
bitmask = 1 << j;
if (!(netmask[i] & bitmask))
continue;
if ((p1[i] & bitmask) != (p2[i] & bitmask))
return 1;
}
}
return 0;
for (i = 0; i < bytelen; i++)
if ((p1[i] & netmask[i]) != (p2[i] & netmask[i]))
return (1);
return (0);
}
/*
* Taken from ifconfig.c
* Similar to code in ifconfig.c. Fill in the scope ID for link-local
* addresses returned by getifaddrs().
*/
#ifdef INET6
static void
in6_fillscopeid(struct sockaddr_in6 *sin6)
{
u_int16_t ifindex;
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id =
ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
}
ifindex = ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
if (sin6->sin6_scope_id == 0 && ifindex != 0) {
sin6->sin6_scope_id = ifindex;
*(u_int16_t *)&sin6->sin6_addr.s6_addr[2] = 0;
}
}
}
#endif
@ -344,9 +342,8 @@ network_init()
s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
/*
* Loop through all interfaces. For each interface, see if the
* network portion of its address is equal to that of the client.
* If so, we have found the interface that we want to use.
* Loop through all interfaces. For each IPv6 multicast-capable
* interface, join the RPC multicast group on that interface.
*/
for (ifap = ifp; ifap != NULL; ifap = ifap->ifa_next) {
if (ifap->ifa_addr->sa_family != AF_INET6 ||