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add sigar_net_address_hash function

This commit is contained in:
Doug MacEachern 2006-07-10 20:42:16 +00:00
parent 508a7d19b4
commit 42e0842c54
2 changed files with 40 additions and 0 deletions
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2
include/sigar.h
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@ -409,6 +409,8 @@ SIGAR_DECLARE(int) sigar_net_address_to_string(sigar_t *sigar,
sigar_net_address_t *address, sigar_net_address_t *address,
char *addr_str); char *addr_str);
SIGAR_DECLARE(sigar_uint32_t) sigar_net_address_hash(sigar_net_address_t *address);
#ifndef INET6_ADDRSTRLEN #ifndef INET6_ADDRSTRLEN
# define INET6_ADDRSTRLEN 46 # define INET6_ADDRSTRLEN 46
#endif #endif

38
src/sigar.c
View File

@ -1672,6 +1672,44 @@ SIGAR_DECLARE(int) sigar_net_address_to_string(sigar_t *sigar,
return SIGAR_OK; return SIGAR_OK;
} }
SIGAR_DECLARE(sigar_uint32_t) sigar_net_address_hash(sigar_net_address_t *address)
{
sigar_uint32_t hash = 0;
unsigned char *data;
int i=0, size, elts;
switch (address->family) {
case SIGAR_AF_UNSPEC:
case SIGAR_AF_INET:
return address->addr.in;
case SIGAR_AF_INET6:
data = (unsigned char *)&address->addr.in6;
size = sizeof(address->addr.in6);
elts = 4;
break;
case SIGAR_AF_LINK:
data = (unsigned char *)&address->addr.mac;
size = sizeof(address->addr.mac);
elts = 2;
break;
default:
return -1;
}
while (i<size) {
int j=0;
int component=0;
while (j<elts && i<size) {
component = (component << 8) + data[i];
j++;
i++;
}
hash += component;
}
return hash;
}
static int fqdn_ip_get(sigar_t *sigar, char *name) static int fqdn_ip_get(sigar_t *sigar, char *name)
{ {
int i, status; int i, status;