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Allow ifunit() routine to understand names like ed0f2. Also

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fix a bug caused by using bcmp() instead of strcmp().

Reviewed by:	Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
This commit is contained in:
Boris Popov 1999-12-13 15:57:11 +00:00
parent d5756b2599
commit 8b7805e44e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=54557
1 changed files with 26 additions and 31 deletions
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57
sys/net/if.c
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@ -597,46 +597,41 @@ if_slowtimo(arg)
* interface structure pointer.
*/
struct ifnet *
ifunit(name)
register char *name;
ifunit(char *name)
{
char namebuf[IFNAMSIZ + 1];
register char *cp, *cp2;
char *end;
register struct ifnet *ifp;
char *cp;
struct ifnet *ifp;
int unit;
unsigned len;
register char c = '\0';
unsigned len, m;
char c;
/*
* Look for a non numeric part
*/
end = name + IFNAMSIZ;
cp2 = namebuf;
cp = name;
while ((cp < end) && (c = *cp)) {
if (c >= '0' && c <= '9')
break;
*cp2++ = c;
cp++;
}
if ((cp == end) || (c == '\0') || (cp == name))
return ((struct ifnet *)0);
*cp2 = '\0';
/*
* check we have a legal number (limit to 7 digits?)
*/
len = strlen(name);
if (len < 2 || len > IFNAMSIZ)
return NULL;
cp = name + len - 1;
c = *cp;
if (c < '0' || c > '9')
return NULL; /* trailing garbage */
unit = 0;
m = 1;
do {
if (cp == name)
return NULL; /* no interface name */
unit += (c - '0') * m;
if (unit > 1000000)
return NULL; /* number is unreasonable */
m *= 10;
c = *--cp;
} while (c >= '0' && c <= '9');
len = cp - name + 1;
for (unit = 0;
((c = *cp) >= '0') && (c <= '9') && (unit < 1000000); cp++ )
unit = (unit * 10) + (c - '0');
if (*cp != '\0')
return 0; /* no trailing garbage allowed */
bcopy(name, namebuf, len);
namebuf[len] = '\0';
/*
* Now search all the interfaces for this name/number
*/
for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
if (bcmp(ifp->if_name, namebuf, len))
if (strcmp(ifp->if_name, namebuf))
continue;
if (unit == ifp->if_unit)
break;