zebra: Refactor netlink interactions

Separate core netlink functions and library functions from route-related
interactions and interface-related interactions.

Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>
Reviewed-by:   Don Slice <dslice@cumulusnetworks.com>

Ticket: CM-13199
Reviewed By: CCR-5254
Testing Done: bgp-min, ospf-min

1 files changed, 53 insertions, 0 deletions

diff --git a/zebra/kernel_netlink.h b/zebra/kernel_netlink.h
new file mode 100644
index 0000000000..0efd89f125
--- /dev/null
+++ b/zebra/kernel_netlink.h
@@ -0,0 +1,53 @@
+/* Declarations and definitions for kernel interaction over netlink
+ * Copyright (C) 2016 Cumulus Networks, Inc.
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
+#ifndef _ZEBRA_KERNEL_NETLINK_H
+#define _ZEBRA_KERNEL_NETLINK_H
+
+#ifdef HAVE_NETLINK
+
+#define NL_PKT_BUF_SIZE         8192
+
+extern void netlink_parse_rtattr (struct rtattr **tb, int max,
+                                  struct rtattr *rta, int len);
+extern int addattr_l (struct nlmsghdr *n, unsigned int maxlen,
+                      int type, void *data, int alen);
+extern int rta_addattr_l (struct rtattr *rta, unsigned int maxlen,
+                          int type, void *data, int alen);
+extern int addattr32 (struct nlmsghdr *n, unsigned int maxlen,
+                      int type, int data);
+extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
+extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
+extern struct rtattr * rta_nest(struct rtattr *rta, int maxlen, int type);
+extern int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
+extern const char * nl_msg_type_to_str (uint16_t msg_type);
+extern const char * nl_rtproto_to_str (u_char rtproto);
+
+extern int netlink_parse_info (int (*filter) (struct sockaddr_nl *,
+                               struct nlmsghdr *, ns_id_t), struct nlsock *nl,
+                               struct zebra_ns *zns, int count);
+extern int netlink_talk (struct nlmsghdr *n, struct nlsock *nl,
+                         struct zebra_ns *zns);
+extern int netlink_request (int family, int type, struct nlsock *nl);
+
+#endif /* HAVE_NETLINK */
+
+#endif /* _ZEBRA_KERNEL_NETLINK_H */