static int
rtnetlink_rcv_msg(struct sk_buf *skb, struct nlmsghdr *nlh) {
// struct net *net = sock_net(skb->sk);
rtnl_doit_func doit;
int sz_idx, kind;
int family;
int type;
int err;
type = nlh->nlmsg_type;
if (type > RTM_MAX) {
RTE_LOG(ERR, QoS, "Operation not supported!\n");
return -EOPNOTSUPP;
}
type -= RTM_BASE;
/* All the messages must have at least 1 byte length */
if (nlmsg_len(nlh) < (int)sizeof(struct rtgenmsg)) {
RTE_LOG(ERR, QoS, "Message is too short!\n");
return 0;
}
family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
sz_idx = type>>2;
kind = type&3;
// if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
// return -EPERM;
// if (kind != 2) {
// RTE_LOG(ERR, QoS, "Operation is not permitted!\n");
// return -EPERM;
// }
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
// struct sock *rtnl;
rtnl_dumpit_func dumpit;
rtnl_calcit_func calcit;
u16 min_dump_alloc = 0;
dumpit = rtnl_get_dumpit(family, type);
if (dumpit == NULL)
return -EOPNOTSUPP;
calcit = rtnl_get_calcit(family, type);
if (calcit)
min_dump_alloc = calcit(skb, nlh);
// __rtnl_unlock();
// rtnl = net->rtnl;
{
struct netlink_dump_control c = {
.dump = dumpit,
.min_dump_alloc = min_dump_alloc,
};
err = netlink_dump_start(skb, nlh, &c);
}
// rtnl_lock();
return err;
}
static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
rtnl_doit_func doit;
int sz_idx, kind;
int min_len;
int family;
int type;
int err;
type = nlh->nlmsg_type;
if (type > RTM_MAX)
return -EOPNOTSUPP;
type -= RTM_BASE;
/* All the messages must have at least 1 byte length */
if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
return 0;
family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
if (family >= NPROTO)
return -EAFNOSUPPORT;
sz_idx = type>>2;
kind = type&3;
if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
return -EPERM;
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
rtnl_dumpit_func dumpit;
dumpit = rtnl_get_dumpit(family, type);
if (dumpit == NULL)
return -EOPNOTSUPP;
__rtnl_unlock();
err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
rtnl_lock();
return err;
}
memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
min_len = rtm_min[sz_idx];
if (nlh->nlmsg_len < min_len)
return -EINVAL;
if (nlh->nlmsg_len > min_len) {
int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
while (RTA_OK(attr, attrlen)) {
unsigned flavor = attr->rta_type;
if (flavor) {
if (flavor > rta_max[sz_idx])
return -EINVAL;
rta_buf[flavor-1] = attr;
}
attr = RTA_NEXT(attr, attrlen);
}
}
doit = rtnl_get_doit(family, type);
if (doit == NULL)
return -EOPNOTSUPP;
return doit(skb, nlh, (void *)&rta_buf[0]);
}
