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net/netlink/netlink_route.c: Add support for the NETLINK_ROUTE RTM_GETLINK command that is used to obtain a list of all devices in the UP state.

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This commit is contained in:
Gregory Nutt
2019-11-09 17:36:30 -06:00
parent 5b47b535a0
commit 8c85ecf531
3 changed files with 605 additions and 196 deletions
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39
include/netpacket/netlink.h
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@@ -235,11 +235,17 @@
#define NLMSG_ALIGN(n) (((n) + NLMSG_MASK) & ~NLMSG_MASK)
#define NLMSG_HDRLEN sizeof(struct nlmsghdr)
#define NLMSG_LENGTH(n) (NLMSG_HDRLEN + (n))
#define NLMSG_DATA(hdr) ((FAR void*)(((FAR char*)hdr) + NLMSG_HDRLEN)
#define NLMSG_DATA(hdr) ((FAR void*)(((FAR char*)hdr) + NLMSG_HDRLEN))
#define NLMSG_NEXT(hdr,n) \
((n) -= NLMSG_ALIGN((hdr)->nlmsg_len), \
(FAR struct nlmsghdr*)(((FAR cha r*)(hdr)) + NLMSG_ALIGN((hdr)->nlmsg_len)))
#define NLMSG_NOOP 1 /* Nothing */
#define NLMSG_ERROR 2 /* Error */
#define NLMSG_DONE 3 /* End of a dump */
#define NLMSG_OVERRUN 4 /* Data lost */
#define NLMSG_MIN_TYPE 16 /* < 16: Reserved control messages */
/* Definitions for struct rtattr ********************************************/
/* Macros to handle rtattributes */
@@ -265,8 +271,19 @@
* address set by the user and other undocumented flags.
*/
#define IFA_F_SECONDARY 0x01
#define IFA_F_PERMANENT 0x02
#define IFA_F_SECONDARY 0x01
#define IFA_F_PERMANENT 0x02
/* Definitions for struct ifinfomsg *****************************************/
#define IFLA_RTA(r) ((FAR struct rtattr *) \
(((FAR char *)(r)) + \
NLMSG_ALIGN(sizeof(struct ifinfomsg))))
#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg))
/* Values for rta_type */
#define IFLA_IFNAME 1
/****************************************************************************
* Public Type Definitions
@@ -318,13 +335,21 @@ struct rtattr
struct ifinfomsg
{
uint8_t ifi_family; /* AF_UNSPEC */
uint16_t ifi_type; /* Device type */
int16_t ifi_index; /* Unique interface index */
uint32_t ifi_flags; /* Device flags */
uint8_t ifi_family; /* AF_UNSPEC */
uint8_t ifi_pid;
uint16_t ifi_type; /* Device type (ARPHRD) */
int16_t ifi_index; /* Unique interface index */
uint32_t ifi_flags; /* Device IFF_* flags */
uint32_t ifi_change; /* Change mask, must always be 0xffffffff */
};
/* General form of address family dependent message. */
struct rtgenmsg
{
unsigned char rtgen_family;
};
/* RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR
*
* Add, remove or receive information about an IP address associated with