static NetlinkList *getResultList(int p_socket, int p_request)
{
if(netlink_send(p_socket, p_request) < 0)
{
return NULL;
}
NetlinkList *l_list = NULL;
NetlinkList *l_end = NULL;
int l_size;
int l_done = 0;
while(!l_done)
{
struct nlmsghdr *l_hdr = getNetlinkResponse(p_socket, &l_size, &l_done);
if(!l_hdr)
{ // error
freeResultList(l_list);
return NULL;
}
NetlinkList *l_item = newListItem(l_hdr, l_size);
if(!l_list)
{
l_list = l_item;
}
else
{
l_end->m_next = l_item;
}
l_end = l_item;
}
return l_list;
}
int getifaddrs(struct ifaddrs **ifap)
{
int l_socket;
int l_result;
int l_numLinks;
NetlinkList *l_linkResults;
NetlinkList *l_addrResults;
if(!ifap)
{
return -1;
}
*ifap = NULL;
l_socket = netlink_socket();
if(l_socket < 0)
{
return -1;
}
l_linkResults = getResultList(l_socket, RTM_GETLINK);
if(!l_linkResults)
{
close(l_socket);
return -1;
}
l_addrResults = getResultList(l_socket, RTM_GETADDR);
if(!l_addrResults)
{
close(l_socket);
freeResultList(l_linkResults);
return -1;
}
l_result = 0;
l_numLinks = interpretLinks(l_socket, l_linkResults, ifap);
if(l_numLinks == -1 || interpretAddrs(l_socket, l_addrResults, ifap, l_numLinks) == -1)
{
l_result = -1;
}
freeResultList(l_linkResults);
freeResultList(l_addrResults);
close(l_socket);
return l_result;
}
int getifaddrs(struct ifaddrs **ifap)
{
if(!ifap)
{
return -1;
}
*ifap = NULL;
int l_socket = netlink_socket();
if(l_socket < 0)
{
return -1;
}
NetlinkList *l_linkResults = getResultList(l_socket, RTM_GETLINK);
if(!l_linkResults)
{
close(l_socket);
return -1;
}
NetlinkList *l_addrResults = getResultList(l_socket, RTM_GETADDR);
if(!l_addrResults)
{
close(l_socket);
freeResultList(l_linkResults);
return -1;
}
unsigned l_numLinks = countLinks(l_socket, l_linkResults) + countLinks(l_socket, l_addrResults);
struct ifaddrs *l_links[l_numLinks];
memset(l_links, 0, l_numLinks * sizeof(struct ifaddrs *));
if (interpret(l_socket, l_linkResults, l_links, ifap) == -1)
{
return -1;
}
if (interpret(l_socket, l_addrResults, l_links, ifap) == -1)
{
return -1;
}
freeResultList(l_linkResults);
freeResultList(l_addrResults);
close(l_socket);
return 0;
}