TError TNlLink::AddAddress(const TNlAddr &addr) {
struct rtnl_addr *a = rtnl_addr_alloc();
if (!a)
return TError(EError::Unknown, "Cannot allocate address");
rtnl_addr_set_link(a, Link);
rtnl_addr_set_family(a, nl_addr_get_family(addr.Addr));
rtnl_addr_set_flags(a, IFA_F_NODAD);
int ret = rtnl_addr_set_local(a, addr.Addr);
if (ret < 0) {
rtnl_addr_put(a);
return Error(ret, "Cannot set local address");
}
ret = rtnl_addr_add(GetSock(), a, 0);
if (ret < 0) {
rtnl_addr_put(a);
return Error(ret, "Cannot add address");
}
rtnl_addr_put(a);
return TError::Success();
}
int sysnet_interface_set_addr(VPNInterface *i)
{
int err;
struct nl_cache *link_cache;
struct nl_sock *sock;
struct rtnl_addr *addr;
struct rtnl_link *link;
struct nl_addr *local_addr;
sock = nl_socket_alloc();
nl_connect(sock, NETLINK_ROUTE);
rtnl_link_alloc_cache(sock, AF_UNSPEC, &link_cache);
addr = rtnl_addr_alloc();
link = rtnl_link_get_by_name(link_cache, i->name);
local_addr = nl_addr_build(i->address.ip.family, &i->address.ip.ip4, sizeof(i->address.ip.ip4));
rtnl_addr_set_local(addr, local_addr);
rtnl_addr_set_family(addr, i->address.ip.family);
rtnl_addr_set_prefixlen(addr, i->address.prefix);
rtnl_addr_set_link(addr, link);
if ((err = rtnl_addr_add(sock, addr, 0)) < 0) {
tox_trace(i->context->tox, "Unable to add address %s on %s: %s", ip_ntoa(&i->address.ip), rtnl_link_get_name(link), nl_geterror(err));
}
else {
tox_trace(i->context->tox, "Added address %s on \"%s\"", ip_ntoa(&i->address.ip), i->name);
}
rtnl_link_put(link);
rtnl_addr_put(addr);
nl_cache_free(link_cache);
nl_addr_put(local_addr);
nl_socket_free(sock);
return err;
}
int configure_loopback_interface() {
struct nl_sock *sock = NULL;
struct rtnl_addr *addr = NULL;
struct nl_addr* lo_addr = NULL;
struct nl_cache *cache = NULL;
struct rtnl_link *link = NULL, *link2 = NULL;
int err, nlflags = NLM_F_CREATE, ret = 0;
if(!want_cap(CAP_NET_ADMIN)) {
errWarn("Cannot set the CAP_NET_ADMIN effective capability");
return -1;
}
sock = nl_socket_alloc();
if(sock == NULL) {
errWarn("nl_socket_alloc");
return -1;
}
if((err = nl_connect(sock, NETLINK_ROUTE)) < 0) {
fprintf(stderr, "Unable to connect to netlink: %s\n", nl_geterror(err));
ret = -1;
goto out2;
}
if(rtnl_link_alloc_cache(sock, AF_UNSPEC, &cache) < 0) {
ret = -1;
goto out;
}
link = rtnl_link_get_by_name(cache, "lo");
if (link == NULL) {
ret = -1;
goto out;
}
addr = rtnl_addr_alloc();
if(addr == NULL) {
ret = -1;
goto out;
}
rtnl_addr_set_link(addr, link);
rtnl_addr_set_family(addr, AF_INET);
if((err = nl_addr_parse("127.0.0.1/8", AF_INET, &lo_addr)) < 0) {
fprintf(stderr, "Unable to parse address: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
if((err = rtnl_addr_set_local(addr, lo_addr)) < 0) {
fprintf(stderr, "Unable to set address: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
nl_addr_put(lo_addr);
lo_addr = NULL;
if ((err = rtnl_addr_add(sock, addr, nlflags)) < 0) {
fprintf(stderr, "Unable to add address: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
rtnl_addr_set_family(addr, AF_INET6);
if((err = nl_addr_parse("::1/128", AF_INET6, &lo_addr)) < 0) {
fprintf(stderr, "Unable to parse address: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
if((err = rtnl_addr_set_local(addr, lo_addr)) < 0) {
fprintf(stderr, "Unable to set address: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
nl_addr_put(lo_addr);
lo_addr = NULL;
if ((err = rtnl_addr_add(sock, addr, nlflags)) < 0) {
fprintf(stderr, "Unable to add address: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
link2 = rtnl_link_alloc();
if(link2 == NULL) {
ret = -1;
goto out;
}
rtnl_link_set_flags(link2, IFF_UP);
if((err = rtnl_link_change(sock, link, link2, 0)) < 0) {
fprintf(stderr, "Unable to change link: %s\n", nl_geterror(err));
ret = -1;
goto out;
}
out:
if(lo_addr!=NULL)
nl_addr_put(lo_addr);
if(link2!=NULL)
rtnl_link_put(link2);
if(link!=NULL)
rtnl_link_put(link);
if(cache!=NULL)
nl_cache_put(cache);
if(addr!=NULL)
rtnl_addr_put(addr);
nl_close(sock);
out2:
nl_socket_free(sock);
drop_caps();
return ret;
}
