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Allow cleanup of netutil's interfaces cache

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This commit is contained in:
dmiller
2021-12-12 23:42:38 +00:00
parent e20093b16d
commit 2cea59aca0
3 changed files with 10 additions and 4 deletions
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10
libnetutil/netutil.cc
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@@ -1391,6 +1391,7 @@ static struct interface_info *getinterfaces_dnet(int *howmany, char *errstr, siz
return dcrn.ifaces;
}
static struct interface_info *mydevs = NULL;
/* Returns an allocated array of struct interface_info representing the
available interfaces. The number of interfaces is returned in *howmany. This
function just does caching of results; the real work is done in
@@ -1398,13 +1399,10 @@ static struct interface_info *getinterfaces_dnet(int *howmany, char *errstr, siz
On error, NULL is returned, howmany is set to -1 and the supplied
error buffer "errstr", if not NULL, will contain an error message. */
struct interface_info *getinterfaces(int *howmany, char *errstr, size_t errstrlen) {
static int initialized = 0;
static struct interface_info *mydevs;
static int numifaces = 0;
if (!initialized) {
if (mydevs == NULL) {
mydevs = getinterfaces_dnet(&numifaces, errstr, errstrlen);
initialized = 1;
}
/* These will propagate any error produced in getinterfaces_xxxx() to
@@ -1414,6 +1412,10 @@ struct interface_info *getinterfaces(int *howmany, char *errstr, size_t errstrle
return mydevs;
}
void freeinterfaces(void) {
free(mydevs);
mydevs = NULL;
}
/* The 'dev' passed in must be at least 32 bytes long. Returns 0 on success. */
int ipaddr2devname(char *dev, const struct sockaddr_storage *addr) {