diff options
Diffstat (limited to 'include/libmnl/libmnl.h')
| -rw-r--r-- | include/libmnl/libmnl.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/include/libmnl/libmnl.h b/include/libmnl/libmnl.h new file mode 100644 index 0000000..55f48c1 --- /dev/null +++ b/include/libmnl/libmnl.h @@ -0,0 +1,120 @@ +#ifndef _LIBMNL_H_ +#define _LIBMNL_H_ + +#include <sys/socket.h> /* for sa_family_t */ +#include <linux/netlink.h> + +/* + * generic netlink socket API + */ + +#define MNL_SOCKET_AUTOPID 0 + +struct mnl_socket; + +extern struct mnl_socket *mnl_socket_open(int type); +extern int mnl_socket_bind(struct mnl_socket *nl, int groups, int pid); +extern int mnl_socket_close(struct mnl_socket *nl); +extern int mnl_socket_get_fd(const struct mnl_socket *nl); +extern unsigned int mnl_socket_get_portid(const struct mnl_socket *nl); +extern int mnl_socket_sendto(struct mnl_socket *nl, const void *req, int siz); +extern int mnl_socket_sendmsg(struct mnl_socket *nl, struct msghdr *msg, int flags); +extern int mnl_socket_recvfrom(struct mnl_socket *nl, void *buf, int siz); +extern int mnl_socket_recvmsg(const struct mnl_socket *nl, struct msghdr *msg, int flags); +extern int mnl_socket_setsockopt(struct mnl_socket *nl, int type, void *buf, socklen_t len); +extern int mnl_socket_getsockopt(struct mnl_socket *nl, int type, void *buf, socklen_t *len); + +/* + * generic netlink message API + */ + +#define MNL_ALIGNTO 4 +#define MNL_NLMSG_HDRLEN mnl_align(sizeof(struct nlmsghdr)) + +extern int mnl_align(int len); +extern size_t mnl_nlmsg_size(int len); +extern size_t mnl_nlmsg_total_size(int len); +extern size_t mnl_nlmsg_payload_size(const struct nlmsghdr *nlh); + +/* Netlink message header builder */ +extern struct nlmsghdr *mnl_nlmsg_put_header(void *buf); +extern void *mnl_nlmsg_put_extra_header(struct nlmsghdr *nlh, int size); + +/* Netlink message iterators */ +extern int mnl_nlmsg_ok(const struct nlmsghdr *nlh, int len); +extern struct nlmsghdr *mnl_nlmsg_next(const struct nlmsghdr *nlh, int *len); + +/* Netlink sequence tracking */ +extern int mnl_nlmsg_seq_ok(const struct nlmsghdr *nlh, unsigned int seq); + +/* Netlink header getters */ +extern u_int16_t mnl_nlmsg_get_len(const struct nlmsghdr *nlh); +extern void *mnl_nlmsg_get_data(const struct nlmsghdr *nlh); +extern void *mnl_nlmsg_get_data_offset(const struct nlmsghdr *nlh, int offset); +extern void *mnl_nlmsg_get_tail(const struct nlmsghdr *nlh); + +/* Netlink dump message */ +extern void mnl_nlmsg_print(const struct nlmsghdr *nlh); + +/* + * generic netlink attributes API + */ +#define MNL_ATTR_HDRLEN mnl_align(sizeof(struct nlattr)) + +/* TLV attribute getters */ +extern u_int16_t mnl_attr_get_type(const struct nlattr *attr); +extern u_int16_t mnl_attr_get_len(const struct nlattr *attr); +extern u_int16_t mnl_attr_get_payload_len(const struct nlattr *attr); +extern void *mnl_attr_get_data(const struct nlattr *attr); +extern u_int8_t mnl_attr_get_u8(const struct nlattr *attr); +extern u_int16_t mnl_attr_get_u16(const struct nlattr *attr); +extern u_int32_t mnl_attr_get_u32(const struct nlattr *attr); +extern u_int64_t mnl_attr_get_u64(const struct nlattr *attr); +extern const char *mnl_attr_get_str(const struct nlattr *attr); + +/* TLV attribute putters */ +extern void mnl_attr_put(struct nlmsghdr *nlh, int type, size_t len, const void *data); +extern void mnl_attr_put_u8(struct nlmsghdr *nlh, int type, u_int8_t data); +extern void mnl_attr_put_u16(struct nlmsghdr *nlh, int type, u_int16_t data); +extern void mnl_attr_put_u32(struct nlmsghdr *nlh, int type, u_int32_t data); +extern void mnl_attr_put_u64(struct nlmsghdr *nlh, int type, u_int64_t data); +extern void mnl_attr_put_str(struct nlmsghdr *nlh, int type, const void *data); +extern void mnl_attr_put_str_null(struct nlmsghdr *nlh, int type, const void *data); + +/* TLV attribute parsers */ +extern int mnl_attr_parse(const struct nlmsghdr *nlh, struct nlattr *tb[], int max); +extern int mnl_attr_parse_at_offset(const struct nlmsghdr *nlh, int offset, struct nlattr *tb[], int max); +extern int mnl_attr_parse_nested(const struct nlattr *attr, struct nlattr *tb[], int max); +extern int mnl_attr_ok(const struct nlattr *attr, int len); +extern struct nlattr *mnl_attr_next(const struct nlattr *attr, int *len); + +#define mnl_attr_for_each_nested(pos, head, len) \ + for (pos = mnl_attr_get_data(head), len = mnl_attr_get_len(head); \ + mnl_attr_ok(pos, len); \ + pos = mnl_attr_next(pos, &(len))) + +/* + * callback API + */ +#define MNL_CB_ERROR -1 +#define MNL_CB_STOP 0 +#define MNL_CB_OK 1 + +typedef int (*mnl_cb_t)(const struct nlmsghdr *nlh, void *data); + +extern int mnl_cb_run(const char *buf, int numbytes, unsigned int seq, + mnl_cb_t cb_data, void *data); + +extern int mnl_cb_run2(const char *buf, int numbytes, unsigned int seq, + mnl_cb_t cb_data, void *data, + mnl_cb_t *cb_ctl_array, int cb_ctl_array_len); + +/* + * other declarations + */ + +#ifndef SOL_NETLINK +#define SOL_NETLINK 270 +#endif + +#endif |