1 /* Copyright (C) 2004-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _NETLINKACCESS_H 19 #define _NETLINKACCESS_H 1 20 21 #include <stdint.h> 22 #include <sys/types.h> 23 #include <asm/types.h> 24 #include <linux/netlink.h> 25 #include <linux/rtnetlink.h> 26 27 28 struct netlink_res 29 { 30 struct netlink_res *next; 31 struct nlmsghdr *nlh; 32 size_t size; /* Size of response. */ 33 uint32_t seq; /* sequential number we used. */ 34 }; 35 36 37 struct netlink_handle 38 { 39 int fd; /* Netlink file descriptor. */ 40 pid_t pid; /* Process ID. */ 41 uint32_t seq; /* The sequence number we use currently. */ 42 struct netlink_res *nlm_list; /* Pointer to list of responses. */ 43 struct netlink_res *end_ptr; /* For faster append of new entries. */ 44 }; 45 46 47 extern int __netlink_open (struct netlink_handle *h) attribute_hidden; 48 extern void __netlink_close (struct netlink_handle *h) attribute_hidden; 49 extern void __netlink_free_handle (struct netlink_handle *h) 50 attribute_hidden; 51 extern int __netlink_request (struct netlink_handle *h, int type) 52 attribute_hidden; 53 54 /* Terminate the process if RESULT is an invalid recvmsg result for 55 the netlink socket FD. */ 56 void __netlink_assert_response (int fd, ssize_t result); 57 libc_hidden_proto (__netlink_assert_response) 58 59 #endif /* netlinkaccess.h */ 60