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Add snooping of DHCPv6 prefix delegation to the DHCP-relay function.

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This commit is contained in:
Simon Kelley
2021-12-30 21:20:37 +00:00
parent 1c8855ed10
commit d242cbffa4
8 changed files with 177 additions and 15 deletions
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19
src/dnsmasq.h
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@@ -778,6 +778,7 @@ struct frec {
#define ACTION_TFTP 5
#define ACTION_ARP 6
#define ACTION_ARP_DEL 7
#define ACTION_RELAY_SNOOP 8
#define LEASE_NEW 1 /* newly created */
#define LEASE_CHANGED 2 /* modified */
@@ -1076,6 +1077,13 @@ struct dhcp_relay {
union all_addr local, server;
char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
int iface_index; /* working - interface in which requests arrived, for return */
#ifdef HAVE_SCRIPT
struct snoop_record {
struct in6_addr client, prefix;
int prefix_len;
struct snoop_record *next;
} *snoop_records;
#endif
struct dhcp_relay *current, *next;
};
@@ -1227,13 +1235,18 @@ extern struct daemon {
unsigned char *duid;
struct iovec outpacket;
int dhcp6fd, icmp6fd;
# ifdef HAVE_SCRIPT
struct snoop_record *free_snoops;
# endif
#endif
/* DBus stuff */
/* void * here to avoid depending on dbus headers outside dbus.c */
void *dbus;
#ifdef HAVE_DBUS
struct watch *watches;
#endif
/* UBus stuff */
#ifdef HAVE_UBUS
/* void * here to avoid depending on ubus headers outside ubus.c */
@@ -1619,6 +1632,9 @@ void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
void queue_arp(int action, unsigned char *mac, int maclen,
int family, union all_addr *addr);
int helper_buf_empty(void);
#ifdef HAVE_DHCP6
void queue_relay_snoop(struct in6_addr *client, int if_index, struct in6_addr *prefix, int prefix_len);
#endif
#endif
/* tftp.c */
@@ -1664,7 +1680,8 @@ unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *if
void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address,
u32 scope_id, time_t now);
unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
int relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
int do_snoop_script_run(void);
#endif
/* dhcp-common.c */