msg.c File Reference

#include <netlink-local.h>
#include <netlink/netlink.h>
#include <netlink/utils.h>
#include <netlink/cache.h>
#include <netlink/attr.h>
#include <linux/socket.h>

Include dependency graph for msg.c:

Macros
#define	PRINT_FLAG(f)

Functions
Size Calculations
int	nlmsg_msg_size (int payload)
	length of netlink message not including padding More...
int	nlmsg_total_size (int payload)
	length of netlink message including padding More...
int	nlmsg_padlen (int payload)
	length of padding at the message's tail More...
Payload Access
void *	nlmsg_data (const struct nlmsghdr *nlh)
	head of message payload More...
void *	nlmsg_tail (const struct nlmsghdr *nlh)
int	nlmsg_len (const struct nlmsghdr *nlh)
	length of message payload More...
Attribute Access
struct nlattr *	nlmsg_attrdata (const struct nlmsghdr *nlh, int hdrlen)
	head of attributes data More...
int	nlmsg_attrlen (const struct nlmsghdr *nlh, int hdrlen)
	length of attributes data More...
Message Parsing
int	nlmsg_valid_hdr (const struct nlmsghdr *nlh, int hdrlen)
int	nlmsg_ok (const struct nlmsghdr *nlh, int remaining)
	check if the netlink message fits into the remaining bytes More...
struct nlmsghdr *	nlmsg_next (struct nlmsghdr *nlh, int *remaining)
	next netlink message in message stream More...
int	nlmsg_parse (struct nlmsghdr *nlh, int hdrlen, struct nlattr *tb[], int maxtype, struct nla_policy *policy)
	parse attributes of a netlink message More...
struct nlattr *	nlmsg_find_attr (struct nlmsghdr *nlh, int hdrlen, int attrtype)
	nlmsg_find_attr - find a specific attribute in a netlink message More...
int	nlmsg_validate (struct nlmsghdr *nlh, int hdrlen, int maxtype, struct nla_policy *policy)
	nlmsg_validate - validate a netlink message including attributes More...
Message Building/Access
struct nl_msg *	nlmsg_alloc (void)
	Allocate a new netlink message with the default maximum payload size. More...
struct nl_msg *	nlmsg_alloc_size (size_t max)
	Allocate a new netlink message with maximum payload size specified. More...
struct nl_msg *	nlmsg_inherit (struct nlmsghdr *hdr)
	Allocate a new netlink message and inherit netlink message header. More...
struct nl_msg *	nlmsg_alloc_simple (int nlmsgtype, int flags)
	Allocate a new netlink message. More...
void	nlmsg_set_default_size (size_t max)
	Set the default maximum message payload size for allocated messages. More...
struct nl_msg *	nlmsg_convert (struct nlmsghdr *hdr)
	Convert a netlink message received from a netlink socket to a nl_msg. More...
void *	nlmsg_reserve (struct nl_msg *n, size_t len, int pad)
	Reserve room for additional data in a netlink message. More...
int	nlmsg_append (struct nl_msg *n, void *data, size_t len, int pad)
	Append data to tail of a netlink message. More...
int	nlmsg_expand (struct nl_msg *n, size_t newlen)
	Expand maximum payload size of a netlink message. More...
struct nlmsghdr *	nlmsg_put (struct nl_msg *n, uint32_t pid, uint32_t seq, int type, int payload, int flags)
	Add a netlink message header to a netlink message. More...
struct nlmsghdr *	nlmsg_hdr (struct nl_msg *n)
	Return actual netlink message. More...
void	nlmsg_get (struct nl_msg *msg)
	Acquire a reference on a netlink message. More...
void	nlmsg_free (struct nl_msg *msg)
	Release a reference from an netlink message. More...
Attributes
void	nlmsg_set_proto (struct nl_msg *msg, int protocol)
int	nlmsg_get_proto (struct nl_msg *msg)
size_t	nlmsg_get_max_size (struct nl_msg *msg)
void	nlmsg_set_src (struct nl_msg *msg, struct sockaddr_nl *addr)
struct sockaddr_nl *	nlmsg_get_src (struct nl_msg *msg)
void	nlmsg_set_dst (struct nl_msg *msg, struct sockaddr_nl *addr)
struct sockaddr_nl *	nlmsg_get_dst (struct nl_msg *msg)
void	nlmsg_set_creds (struct nl_msg *msg, struct ucred *creds)
struct ucred *	nlmsg_get_creds (struct nl_msg *msg)
Netlink Message Flags Translations
char *	nl_nlmsg_flags2str (int flags, char *buf, size_t len)
Direct Parsing
int	nl_msg_parse (struct nl_msg *msg, void(*cb)(struct nl_object *, void *), void *arg)
Dumping
void	nl_msg_dump (struct nl_msg *msg, FILE *ofd)
	Dump message in human readable format to file descriptor. More...

Netlink Message Type Translations
char *	nl_nlmsgtype2str (int type, char *buf, size_t size)
int	nl_str2nlmsgtype (const char *name)

Macro Definition Documentation

#define PRINT_FLAG

(

f

)

Value:

if (flags & NLM_F_##f) { \
		flags &= ~NLM_F_##f; \
        strncat(buf, #f, len - strlen(buf) - 1); \
        if (flags) \
            strncat(buf, ",", len - strlen(buf) - 1); \
    }

Referenced by nl_nlmsg_flags2str().