#define VRRP_TYPE_ADVERTISEMENT 1
-extern const char *vrrp_packet_names[16];
-
/*
* Shared header for VRRPv2/v3 packets.
*/
* When used, this is actually an array of one or the other, not an
* array of union. If N v4 addresses are stored then
* sizeof(addrs) == N * sizeof(struct in_addr).
+ *
+ * Under v2, the last 2 entries in this array are the authentication
+ * data fields. We don't support auth in v2 so these are always just 8
+ * bytes of 0x00.
*/
union {
struct in_addr v4;
} addrs[];
} __attribute__((packed));
-#define VRRP_PKT_SIZE(_f, _naddr) \
+#define VRRP_PKT_SIZE(_f, _ver, _naddr) \
({ \
size_t _asz = ((_f) == AF_INET) ? sizeof(struct in_addr) \
: sizeof(struct in6_addr); \
- sizeof(struct vrrp_hdr) + (_asz * (_naddr)); \
+ size_t _auth = 2 * sizeof(uint32_t) * (3 - (_ver)); \
+ sizeof(struct vrrp_hdr) + (_asz * (_naddr)) + _auth; \
})
-#define VRRP_MIN_PKT_SIZE_V4 VRRP_PKT_SIZE(AF_INET, 1)
-#define VRRP_MAX_PKT_SIZE_V4 VRRP_PKT_SIZE(AF_INET, 255)
-#define VRRP_MIN_PKT_SIZE_V6 VRRP_PKT_SIZE(AF_INET6, 1)
-#define VRRP_MAX_PKT_SIZE_V6 VRRP_PKT_SIZE(AF_INET6, 255)
+#define VRRP_MIN_PKT_SIZE_V4 VRRP_PKT_SIZE(AF_INET, 3, 1)
+#define VRRP_MAX_PKT_SIZE_V4 VRRP_PKT_SIZE(AF_INET, 2, 255)
+#define VRRP_MIN_PKT_SIZE_V6 VRRP_PKT_SIZE(AF_INET6, 3, 1)
+#define VRRP_MAX_PKT_SIZE_V6 VRRP_PKT_SIZE(AF_INET6, 3, 255)
#define VRRP_MIN_PKT_SIZE VRRP_MIN_PKT_SIZE_V4
#define VRRP_MAX_PKT_SIZE VRRP_MAX_PKT_SIZE_V6
uint16_t max_adver_int, uint8_t numip,
struct ipaddr **ips);
+/* free memory allocated by vrrp_pkt_adver_build's pkt arg */
+void vrrp_pkt_free(struct vrrp_pkt *pkt);
+
/*
* Dumps a VRRP ADVERTISEMENT packet to a string.
*