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net: added net_default_gateway_get()

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This commit is contained in:
Richard Aas 2015-06-22 08:18:55 +00:00
parent 3e997ac54d
commit 4985c30a97
2 changed files with 50 additions and 0 deletions
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1
include/re_net.h
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@ -51,6 +51,7 @@ struct sa;
/* Net generic */
int net_hostaddr(int af, struct sa *ip);
int net_default_source_addr_get(int af, struct sa *ip);
int net_default_gateway_get(int af, struct sa *gw);
/* Net sockets */

49
src/net/net.c
View file

@ -104,3 +104,52 @@ int net_if_apply(net_ifaddr_h *ifh, void *arg)
return net_if_list(ifh, arg);
#endif
}
static bool net_rt_handler(const char *ifname, const struct sa *dst,
int dstlen, const struct sa *gw, void *arg)
{
void **argv = arg;
struct sa *ip = argv[1];
(void)dst;
(void)dstlen;
if (0 == str_cmp(ifname, argv[0])) {
*ip = *gw;
return true;
}
return false;
}
/**
* Get the IP-address of the default gateway
*
* @param af Address Family
* @param gw Returned Gateway address
*
* @return 0 if success, otherwise errorcode
*/
int net_default_gateway_get(int af, struct sa *gw)
{
char ifname[64];
void *argv[2];
int err;
if (!af || !gw)
return EINVAL;
err = net_rt_default_get(af, ifname, sizeof(ifname));
if (err)
return err;
argv[0] = ifname;
argv[1] = gw;
err = net_rt_list(net_rt_handler, argv);
if (err)
return err;
return 0;
}