rtnetlink.c (af65bdfce98d7965fbe93a48b8128444a2eea024) rtnetlink.c (1c2d670f3660e9103fdcdca702f6dbf8ea7d6afb)
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>

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854
855static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
856{
857 rtnl_doit_func doit;
858 int sz_idx, kind;
859 int min_len;
860 int family;
861 int type;
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>

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854
855static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
856{
857 rtnl_doit_func doit;
858 int sz_idx, kind;
859 int min_len;
860 int family;
861 int type;
862 int err;
862
863 type = nlh->nlmsg_type;
864 if (type > RTM_MAX)
865 return -EOPNOTSUPP;
866
867 type -= RTM_BASE;
868
869 /* All the messages must have at least 1 byte length */

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882
883 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
884 rtnl_dumpit_func dumpit;
885
886 dumpit = rtnl_get_dumpit(family, type);
887 if (dumpit == NULL)
888 return -EOPNOTSUPP;
889
863
864 type = nlh->nlmsg_type;
865 if (type > RTM_MAX)
866 return -EOPNOTSUPP;
867
868 type -= RTM_BASE;
869
870 /* All the messages must have at least 1 byte length */

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883
884 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
885 rtnl_dumpit_func dumpit;
886
887 dumpit = rtnl_get_dumpit(family, type);
888 if (dumpit == NULL)
889 return -EOPNOTSUPP;
890
890 return netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
891 __rtnl_unlock();
892 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
893 rtnl_lock();
894 return err;
891 }
892
893 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
894
895 min_len = rtm_min[sz_idx];
896 if (nlh->nlmsg_len < min_len)
897 return -EINVAL;
898

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967 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
968 if (rta_max[i] > rtattr_max)
969 rtattr_max = rta_max[i];
970 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
971 if (!rta_buf)
972 panic("rtnetlink_init: cannot allocate rta_buf\n");
973
974 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
895 }
896
897 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
898
899 min_len = rtm_min[sz_idx];
900 if (nlh->nlmsg_len < min_len)
901 return -EINVAL;
902

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971 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
972 if (rta_max[i] > rtattr_max)
973 rtattr_max = rta_max[i];
974 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
975 if (!rta_buf)
976 panic("rtnetlink_init: cannot allocate rta_buf\n");
977
978 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
975 NULL, THIS_MODULE);
979 &rtnl_mutex, THIS_MODULE);
976 if (rtnl == NULL)
977 panic("rtnetlink_init: cannot initialize rtnetlink\n");
978 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
979 register_netdevice_notifier(&rtnetlink_dev_notifier);
980
981 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
982 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
983

--- 14 unchanged lines hidden --- 		980 if (rtnl == NULL)
981 panic("rtnetlink_init: cannot initialize rtnetlink\n");
982 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
983 register_netdevice_notifier(&rtnetlink_dev_notifier);
984
985 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
986 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
987

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