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Improve the performance of DHCP relay.

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On machines with many interfaces, enumerating them
via netlink on each packet reciept is slow,
and unneccesary. All we need is the local address->interface
mapping, which can be cached in the relay structures.
This commit is contained in:
Simon Kelley
2022-02-01 00:18:44 +00:00
parent dbceeb4178
commit 7fbf1cce7b
5 changed files with 217 additions and 207 deletions
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4
src/dnsmasq.h
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@@ -1089,7 +1089,7 @@ struct dhcp_relay {
struct snoop_record *next;
} *snoop_records;
#endif
struct dhcp_relay *current, *next;
struct dhcp_relay *next;
};
extern struct daemon {
@@ -1682,7 +1682,7 @@ void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
size_t sz, struct in6_addr *client_addr, time_t now);
void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address,
int relay_upstream6(int iface_index, ssize_t sz, struct in6_addr *peer_address,
u32 scope_id, time_t now);
int relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);