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-rw-r--r--include/libnetlink.h358
1 files changed, 358 insertions, 0 deletions
diff --git a/include/libnetlink.h b/include/libnetlink.h
new file mode 100644
index 0000000..ad7e712
--- /dev/null
+++ b/include/libnetlink.h
@@ -0,0 +1,358 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBNETLINK_H__
+#define __LIBNETLINK_H__ 1
+
+#include <stdio.h>
+#include <string.h>
+#include <asm/types.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <linux/if_link.h>
+#include <linux/if_addr.h>
+#include <linux/neighbour.h>
+#include <linux/netconf.h>
+#include <arpa/inet.h>
+
+struct rtnl_handle {
+ int fd;
+ struct sockaddr_nl local;
+ struct sockaddr_nl peer;
+ __u32 seq;
+ __u32 dump;
+ int proto;
+ FILE *dump_fp;
+#define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01
+#define RTNL_HANDLE_F_SUPPRESS_NLERR 0x02
+#define RTNL_HANDLE_F_STRICT_CHK 0x04
+ int flags;
+};
+
+struct nlmsg_list {
+ struct nlmsg_list *next;
+ struct nlmsghdr h;
+};
+
+struct nlmsg_chain {
+ struct nlmsg_list *head;
+ struct nlmsg_list *tail;
+};
+
+struct ipstats_req {
+ struct nlmsghdr nlh;
+ struct if_stats_msg ifsm;
+ char buf[128];
+};
+
+extern int rcvbuf;
+
+int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)
+ __attribute__((warn_unused_result));
+
+int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
+ int protocol)
+ __attribute__((warn_unused_result));
+int rtnl_add_nl_group(struct rtnl_handle *rth, unsigned int group)
+ __attribute__((warn_unused_result));
+void rtnl_close(struct rtnl_handle *rth);
+void rtnl_set_strict_dump(struct rtnl_handle *rth);
+
+typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen);
+
+int rtnl_addrdump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+int rtnl_addrlbldump_req(struct rtnl_handle *rth, int family)
+ __attribute__((warn_unused_result));
+int rtnl_routedump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+int rtnl_ruledump_req(struct rtnl_handle *rth, int family)
+ __attribute__((warn_unused_result));
+int rtnl_neighdump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+int rtnl_neightbldump_req(struct rtnl_handle *rth, int family)
+ __attribute__((warn_unused_result));
+int rtnl_mdbdump_req(struct rtnl_handle *rth, int family)
+ __attribute__((warn_unused_result));
+int rtnl_brvlandump_req(struct rtnl_handle *rth, int family, __u32 dump_flags)
+ __attribute__((warn_unused_result));
+int rtnl_netconfdump_req(struct rtnl_handle *rth, int family)
+ __attribute__((warn_unused_result));
+
+int rtnl_linkdump_req(struct rtnl_handle *rth, int fam)
+ __attribute__((warn_unused_result));
+int rtnl_linkdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
+ __attribute__((warn_unused_result));
+
+int rtnl_linkdump_req_filter_fn(struct rtnl_handle *rth, int fam,
+ req_filter_fn_t fn)
+ __attribute__((warn_unused_result));
+int rtnl_fdb_linkdump_req_filter_fn(struct rtnl_handle *rth,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+int rtnl_nsiddump_req_filter_fn(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+int rtnl_statsdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask,
+ int (*filter_fn)(struct ipstats_req *req,
+ void *data),
+ void *filter_data)
+ __attribute__((warn_unused_result));
+int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req,
+ int len)
+ __attribute__((warn_unused_result));
+int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n)
+ __attribute__((warn_unused_result));
+
+int rtnl_nexthopdump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+int rtnl_nexthop_bucket_dump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
+ __attribute__((warn_unused_result));
+
+int rtnl_tunneldump_req(struct rtnl_handle *rth, int family, int ifindex,
+ __u8 flags)
+ __attribute__((warn_unused_result));
+
+struct rtnl_ctrl_data {
+ int nsid;
+};
+
+typedef int (*rtnl_filter_t)(struct nlmsghdr *n, void *);
+
+/**
+ * rtnl error handler called from
+ * rtnl_dump_done()
+ * rtnl_dump_error()
+ *
+ * Return value is a bitmask of the following values:
+ * RTNL_LET_NLERR
+ * error handled as usual
+ * RTNL_SUPPRESS_NLMSG_DONE_NLERR
+ * error in nlmsg_type == NLMSG_DONE will be suppressed
+ * RTNL_SUPPRESS_NLMSG_ERROR_NLERR
+ * error in nlmsg_type == NLMSG_ERROR will be suppressed
+ * and nlmsg will be skipped
+ * RTNL_SUPPRESS_NLERR - suppress error in both previous cases
+ */
+#define RTNL_LET_NLERR 0x01
+#define RTNL_SUPPRESS_NLMSG_DONE_NLERR 0x02
+#define RTNL_SUPPRESS_NLMSG_ERROR_NLERR 0x04
+#define RTNL_SUPPRESS_NLERR 0x06
+typedef int (*rtnl_err_hndlr_t)(struct nlmsghdr *n, void *);
+
+typedef int (*rtnl_listen_filter_t)(struct rtnl_ctrl_data *,
+ struct nlmsghdr *n, void *);
+
+typedef int (*nl_ext_ack_fn_t)(const char *errmsg, uint32_t off,
+ const struct nlmsghdr *inner_nlh);
+
+struct rtnl_dump_filter_arg {
+ rtnl_filter_t filter;
+ void *arg1;
+ rtnl_err_hndlr_t errhndlr;
+ void *arg2;
+ __u16 nc_flags;
+};
+
+int rtnl_dump_filter_nc(struct rtnl_handle *rth,
+ rtnl_filter_t filter,
+ void *arg, __u16 nc_flags);
+#define rtnl_dump_filter(rth, filter, arg) \
+ rtnl_dump_filter_nc(rth, filter, arg, 0)
+int rtnl_dump_filter_errhndlr_nc(struct rtnl_handle *rth,
+ rtnl_filter_t filter,
+ void *arg1,
+ rtnl_err_hndlr_t errhndlr,
+ void *arg2,
+ __u16 nc_flags);
+#define rtnl_dump_filter_errhndlr(rth, filter, farg, errhndlr, earg) \
+ rtnl_dump_filter_errhndlr_nc(rth, filter, farg, errhndlr, earg, 0)
+
+int rtnl_echo_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, int json,
+ int (*print_info)(struct nlmsghdr *n, void *arg))
+ __attribute__((warn_unused_result));
+int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
+ struct nlmsghdr **answer)
+ __attribute__((warn_unused_result));
+int rtnl_talk_suppress_rtnl_errmsg(struct rtnl_handle *rtnl, struct nlmsghdr *n,
+ struct nlmsghdr **answer)
+ __attribute__((warn_unused_result));
+int rtnl_send(struct rtnl_handle *rth, const void *buf, int)
+ __attribute__((warn_unused_result));
+int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int)
+ __attribute__((warn_unused_result));
+int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn);
+int nl_dump_ext_ack_done(const struct nlmsghdr *nlh, unsigned int offset, int error);
+
+int addattr(struct nlmsghdr *n, int maxlen, int type);
+int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
+int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);
+int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
+int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);
+int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data);
+
+int addattr_l(struct nlmsghdr *n, int maxlen, int type,
+ const void *data, int alen);
+int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
+struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
+int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
+struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type,
+ const void *data, int len);
+int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
+int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data);
+int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data);
+int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
+int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data);
+int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
+ const void *data, int alen);
+
+int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
+int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta,
+ int len, unsigned short flags);
+struct rtattr *parse_rtattr_one(int type, struct rtattr *rta, int len);
+int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);
+
+struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type);
+int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
+
+#define RTA_TAIL(rta) \
+ ((struct rtattr *) (((void *) (rta)) + \
+ RTA_ALIGN((rta)->rta_len)))
+
+#define parse_rtattr_nested(tb, max, rta) \
+ (parse_rtattr_flags((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta), \
+ NLA_F_NESTED))
+
+#define parse_rtattr_one_nested(type, rta) \
+ (parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta)))
+
+#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
+ ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
+ __parse_rtattr_nested_compat(tb, max, rta, len); })
+
+static inline __u8 rta_getattr_u8(const struct rtattr *rta)
+{
+ return *(__u8 *)RTA_DATA(rta);
+}
+static inline __u16 rta_getattr_u16(const struct rtattr *rta)
+{
+ return *(__u16 *)RTA_DATA(rta);
+}
+static inline __be16 rta_getattr_be16(const struct rtattr *rta)
+{
+ return ntohs(rta_getattr_u16(rta));
+}
+static inline __u32 rta_getattr_u32(const struct rtattr *rta)
+{
+ return *(__u32 *)RTA_DATA(rta);
+}
+static inline __be32 rta_getattr_be32(const struct rtattr *rta)
+{
+ return ntohl(rta_getattr_u32(rta));
+}
+static inline __u64 rta_getattr_u64(const struct rtattr *rta)
+{
+ __u64 tmp;
+
+ memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
+ return tmp;
+}
+static inline __s32 rta_getattr_s32(const struct rtattr *rta)
+{
+ return *(__s32 *)RTA_DATA(rta);
+}
+static inline __s64 rta_getattr_s64(const struct rtattr *rta)
+{
+ __s64 tmp;
+
+ memcpy(&tmp, RTA_DATA(rta), sizeof(tmp));
+ return tmp;
+}
+static inline const char *rta_getattr_str(const struct rtattr *rta)
+{
+ return (const char *)RTA_DATA(rta);
+}
+static inline int rta_type(const struct rtattr *rta)
+{
+ return rta->rta_type & NLA_TYPE_MASK;
+}
+
+int rtnl_listen_all_nsid(struct rtnl_handle *);
+int rtnl_listen(struct rtnl_handle *, rtnl_listen_filter_t handler,
+ void *jarg);
+int rtnl_from_file(FILE *, rtnl_listen_filter_t handler,
+ void *jarg);
+
+#define NLMSG_TAIL(nmsg) \
+ ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
+
+#ifndef IFA_RTA
+#define IFA_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+#endif
+#ifndef IFA_PAYLOAD
+#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
+#endif
+
+#ifndef IFLA_RTA
+#define IFLA_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
+#endif
+#ifndef IFLA_PAYLOAD
+#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg))
+#endif
+
+#ifndef NDA_RTA
+#define NDA_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
+#endif
+#ifndef NDA_PAYLOAD
+#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndmsg))
+#endif
+
+#ifndef NDTA_RTA
+#define NDTA_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
+#endif
+#ifndef NDTA_PAYLOAD
+#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg))
+#endif
+
+#ifndef NETNS_RTA
+#define NETNS_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))))
+#endif
+#ifndef NETNS_PAYLOAD
+#define NETNS_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg))
+#endif
+
+#ifndef IFLA_STATS_RTA
+#define IFLA_STATS_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct if_stats_msg))))
+#endif
+
+#ifndef BRVLAN_RTA
+#define BRVLAN_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct br_vlan_msg))))
+#endif
+
+#ifndef TUNNEL_RTA
+#define TUNNEL_RTA(r) \
+ ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct tunnel_msg))))
+#endif
+
+/* User defined nlmsg_type which is used mostly for logging netlink
+ * messages from dump file */
+#define NLMSG_TSTAMP 15
+
+#define rtattr_for_each_nested(attr, nest) \
+ for ((attr) = (void *)RTA_DATA(nest); \
+ RTA_OK(attr, RTA_PAYLOAD(nest) - ((char *)(attr) - (char *)RTA_DATA((nest)))); \
+ (attr) = RTA_TAIL((attr)))
+
+void nl_print_policy(const struct rtattr *attr, FILE *fp);
+
+#endif /* __LIBNETLINK_H__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 05:28:14 +0000