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rtnlutil: Add parser for ifaddrmsg struct

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Its purpose is to extract interface label, ip, and
broadcast addresses out of ifaddrmsg rntl message.
This commit is contained in:
Tim Kourt 2019-06-25 15:20:53 -07:00 committed by Denis Kenzior
parent 4e3e1fbf60
commit f3f343c04b
2 changed files with 39 additions and 0 deletions
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36
src/rtnlutil.c
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@ -26,6 +26,7 @@
#include <sys/socket.h> #include <sys/socket.h>
#include <linux/rtnetlink.h> #include <linux/rtnetlink.h>
#include <arpa/inet.h>
#include <ell/ell.h> #include <ell/ell.h>
@ -74,3 +75,38 @@ uint32_t rtnl_set_linkmode_and_operstate(struct l_netlink *rtnl, int ifindex,
return id; return id;
} }
void rtnl_ifaddr_extract(const struct ifaddrmsg *ifa, int bytes,
char **label, char **ip, char **broadcast)
{
struct in_addr in_addr;
struct rtattr *attr;
for (attr = IFA_RTA(ifa); RTA_OK(attr, bytes);
attr = RTA_NEXT(attr, bytes)) {
switch (attr->rta_type) {
case IFA_LOCAL:
if (!ip)
break;
in_addr = *((struct in_addr *) RTA_DATA(attr));
*ip = l_strdup(inet_ntoa(in_addr));
break;
case IFA_BROADCAST:
if (!broadcast)
break;
in_addr = *((struct in_addr *) RTA_DATA(attr));
*broadcast = l_strdup(inet_ntoa(in_addr));
break;
case IFA_LABEL:
if (!label)
break;
*label = l_strdup(RTA_DATA(attr));
break;
}
}
}

3
src/rtnlutil.h
View File

@ -25,3 +25,6 @@ uint32_t rtnl_set_linkmode_and_operstate(struct l_netlink *rtnl, int ifindex,
l_netlink_command_func_t cb, l_netlink_command_func_t cb,
void *user_data, void *user_data,
l_netlink_destroy_func_t destroy); l_netlink_destroy_func_t destroy);
void rtnl_ifaddr_extract(const struct ifaddrmsg *ifa, int bytes,
char **label, char **ip, char **broadcast);