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rtnlutil: Add utility to extract route attributes

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This commit is contained in:
Tim Kourt 2019-07-16 17:49:44 -07:00 committed by Denis Kenzior
parent 56670755c1
commit 83db65e929
2 changed files with 48 additions and 0 deletions
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44
src/rtnlutil.c
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@ -251,3 +251,47 @@ uint32_t rtnl_ifaddr_delete(struct l_netlink *rtnl, int ifindex,
return rtnl_ifaddr_change(rtnl, RTM_DELADDR, ifindex, prefix_len, ip,
broadcast, cb, user_data, destroy);
}
void rtnl_route_extract_ipv4(const struct rtmsg *rtmsg, uint32_t len,
uint32_t *ifindex, char **dst, char **gateway,
char **src)
{
struct in_addr in_addr;
struct rtattr *attr;
for (attr = RTM_RTA(rtmsg); RTA_OK(attr, len);
attr = RTA_NEXT(attr, len)) {
switch (attr->rta_type) {
case RTA_DST:
if (!dst)
break;
in_addr = *((struct in_addr *) RTA_DATA(attr));
*dst = l_strdup(inet_ntoa(in_addr));
break;
case RTA_GATEWAY:
if (!gateway)
break;
in_addr = *((struct in_addr *) RTA_DATA(attr));
*gateway = l_strdup(inet_ntoa(in_addr));
break;
case RTA_PREFSRC:
if (!src)
break;
in_addr = *((struct in_addr *) RTA_DATA(attr));
*src = l_strdup(inet_ntoa(in_addr));
break;
case RTA_OIF:
if (!ifindex)
break;
*ifindex = *((uint32_t *) RTA_DATA(attr));
break;
}
}
}

4
src/rtnlutil.h
View File

@ -47,3 +47,7 @@ uint32_t rtnl_ifaddr_delete(struct l_netlink *rtnl, int ifindex,
const char *broadcast,
l_netlink_command_func_t cb, void *user_data,
l_netlink_destroy_func_t destroy);
void rtnl_route_extract_ipv4(const struct rtmsg *rtmsg, uint32_t len,
uint32_t *ifindex, char **dst, char **gateway,
char **src);