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use stack buffer instead of heap for sigar_net_interface_name_get

This commit is contained in:
Doug MacEachern 2011-04-12 15:16:58 -07:00
parent 4655d5e3df
commit 73c3c287f7
1 changed files with 13 additions and 24 deletions
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37
src/os/win32/win32_sigar.c
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@ -2668,15 +2668,14 @@ static int netif_hash(char *s)
#define IF_TYPE_IEEE80211 71
#endif
static char *
sigar_net_interface_name_get(sigar_t *sigar, MIB_IFROW *ifr, PIP_ADAPTER_ADDRESSES address_list)
static int
sigar_net_interface_name_get(sigar_t *sigar, MIB_IFROW *ifr, PIP_ADAPTER_ADDRESSES address_list, char *name)
{
char *match = NULL;
PIP_ADAPTER_ADDRESSES iter;
int lpc = 0;
if (address_list == NULL) {
return NULL;
return SIGAR_ENOTIMPL;
}
for (iter = address_list; iter != NULL; iter = iter->Next) {
@ -2687,14 +2686,13 @@ sigar_net_interface_name_get(sigar_t *sigar, MIB_IFROW *ifr, PIP_ADAPTER_ADDRESS
}
if (lpc == iter->PhysicalAddressLength) {
match = malloc(MAX_INTERFACE_NAME_LEN);
wcstombs(match, iter->FriendlyName, MAX_INTERFACE_NAME_LEN);
match[MAX_INTERFACE_NAME_LEN-1] = 0;
break;
wcstombs(name, iter->FriendlyName, MAX_INTERFACE_NAME_LEN);
name[MAX_INTERFACE_NAME_LEN-1] = '\0';
return SIGAR_OK;
}
}
return match;
return SIGAR_ENOENT;
}
SIGAR_DECLARE(int)
@ -2742,22 +2740,18 @@ sigar_net_interface_list_get(sigar_t *sigar,
int key;
MIB_IFROW *ifr = ift->table + i;
sigar_cache_entry_t *entry;
char *friendly = NULL;
status = SIGAR_ENOENT;
if (strEQ(ifr->bDescr, MS_LOOPBACK_ADAPTER)) {
/* special-case */
sprintf(name, NETIF_LA "%d", la++);
}
else if (ifr->dwType == MIB_IF_TYPE_LOOPBACK) {
friendly = sigar_net_interface_name_get(sigar, ifr, address_list);
if (friendly == NULL) {
status = sigar_net_interface_name_get(sigar, ifr, address_list, name);
if (status != SIGAR_OK) {
sprintf(name, "lo%d", lo++);
}
else {
snprintf(name, MAX_INTERFACE_NAME_LEN, "%s", friendly);
}
name[MAX_INTERFACE_NAME_LEN] = 0;
free(friendly);
}
else if ((ifr->dwType == MIB_IF_TYPE_ETHERNET) ||
(ifr->dwType == IF_TYPE_IEEE80211))
@ -2765,17 +2759,12 @@ sigar_net_interface_list_get(sigar_t *sigar,
if ((strstr(ifr->bDescr, "Scheduler") == NULL) &&
(strstr(ifr->bDescr, "Filter") == NULL))
{
friendly = sigar_net_interface_name_get(sigar, ifr, address_list);
status = sigar_net_interface_name_get(sigar, ifr, address_list, name);
}
if (friendly == NULL) {
if (status != SIGAR_OK) {
snprintf(name, ifr->dwDescrLen, "%s", ifr->bDescr);
}
else {
snprintf(name, MAX_INTERFACE_NAME_LEN, "%s", friendly);
}
name[MAX_INTERFACE_NAME_LEN] = 0;
free(friendly);
}
else {
continue; /*XXX*/