diff options
Diffstat (limited to 'fwd_rule.h')
| -rw-r--r-- | fwd_rule.h | 36 |
1 files changed, 33 insertions, 3 deletions
@@ -19,6 +19,7 @@ /* Number of ports for both TCP and UDP */ #define NUM_PORTS (1U << 16) +#define PORT_BITMAP_SIZE DIV_ROUND_UP(NUM_PORTS, 8) /* Forwarding capability bits */ #define FWD_CAP_IPV4 BIT(0) @@ -54,8 +55,38 @@ struct fwd_rule { uint8_t flags; }; +#define FWD_RULE_BITS 8 +#define MAX_FWD_RULES MAX_FROM_BITS(FWD_RULE_BITS) + +/* Maximum number of listening sockets (per pif) + * + * Rationale: This lets us listen on every port for two addresses and two + * protocols (which we need for -T auto -U auto without SO_BINDTODEVICE), plus a + * comfortable number of extras. + */ +#define MAX_LISTEN_SOCKS (NUM_PORTS * 5) + +/** + * struct fwd_table - Forwarding state (per initiating pif) + * @caps: Forwarding capabilities for this initiating pif + * @count: Number of forwarding rules + * @rules: Array of forwarding rules + * @rulesocks: Parallel array of @rules (@count valid entries) of pointers to + * @socks entries giving the start of the corresponding rule's + * sockets within the larger array + * @sock_count: Number of entries used in @socks (for all rules combined) + * @socks: Listening sockets for forwarding + */ +struct fwd_table { + uint32_t caps; + unsigned count; + struct fwd_rule rules[MAX_FWD_RULES]; + int *rulesocks[MAX_FWD_RULES]; + unsigned sock_count; + int socks[MAX_LISTEN_SOCKS]; +}; + void fwd_probe_ephemeral(void); -void fwd_port_map_ephemeral(uint8_t *map); #define FWD_RULE_STRLEN \ (IPPROTO_STRLEN - 1 \ @@ -67,7 +98,6 @@ void fwd_port_map_ephemeral(uint8_t *map); const union inany_addr *fwd_rule_addr(const struct fwd_rule *rule); const char *fwd_rule_fmt(const struct fwd_rule *rule, char *dst, size_t size); void fwd_rules_info(const struct fwd_rule *rules, size_t count); -void fwd_rule_conflict_check(const struct fwd_rule *new, - const struct fwd_rule *rules, size_t count); +void fwd_rule_parse(char optname, const char *optarg, struct fwd_table *fwd); #endif /* FWD_RULE_H */ |