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Updated qmem as lazy mode query buffer, other fixes/adjustments and

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support for more client-controlled options
This commit is contained in:
frekky 2015-09-28 13:09:49 +08:00
parent 6eb2e4d251
commit ad48dc8e10
2 changed files with 496 additions and 440 deletions
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911
src/server.c
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25
src/server.h
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@ -41,20 +41,18 @@
#define DNSCACHE_LEN 10
/* Undefine to disable. Should be less than 18; also see comments in iodined.c */
#define QMEMPING_LEN 30
/* Max advisable: 64k/2 = 32000. Total mem usage: QMEMPING_LEN * USERS * 6 bytes */
#define QMEMDATA_LEN 15
/* Max advisable: 36/2 = 18. Total mem usage: QMEMDATA_LEN * USERS * 6 bytes */
/* Max number of incoming queries to hold at one time (recommended to be same as windowsize)
* Memory = USERS * (sizeof(struct query_buffer) + sizeof(query) * QMEM_LEN) */
#define QMEM_LEN 24
/* Number of fragments in outgoing buffer.
* Mem usage: USERS * (MAX_FRAGLEN * OUTFRAGBUF_LEN + sizeof(struct window_buffer) */
* Mem usage: USERS * (MAX_FRAGLEN * OUTFRAGBUF_LEN + sizeof(struct window_buffer)) */
#define OUTFRAGBUF_LEN 64
/* Number of fragments in incoming buffer
/* Number of fragments in incoming buffer; must be at least windowsize * 2
* Minimum recommended = ((max packet size or MTU) / (max up fragsize)) * 2
* ie. (1200 / 100) * 2 = 24 */
#define INFRAGBUF_LEN 32
#define INFRAGBUF_LEN 64
#define PASSWORD_ENV_VAR "IODINED_PASS"
@ -89,6 +87,15 @@ typedef enum {
VERSION_FULL
} version_ack_t;
struct query_buffer {
struct query queries[QMEM_LEN];
size_t start_pending; /* index of first "pending" query (ie. no response yet) */
size_t start; /* index of first stored/pending query */
size_t end; /* index of space after last stored/pending query */
size_t length; /* number of stored queries */
size_t num_pending; /* number of pending queries */
};
extern char *topdomain;
extern char password[33];
extern struct encoder *b32;
@ -112,7 +119,7 @@ int server_tunnel(int tun_fd, struct dnsfd *dns_fds, int bind_fd, int max_idle_t
int read_dns(int fd, struct dnsfd *dns_fds, int tun_fd, struct query *q);
void write_dns(int fd, struct query *q, char *data, size_t datalen, char downenc);
void handle_full_packet(int tun_fd, struct dnsfd *dns_fds, int userid, uint8_t *data, size_t len);
void handle_full_packet(int tun_fd, struct dnsfd *dns_fds, int userid, uint8_t *data, size_t len, int);
void handle_null_request(int tun_fd, int dns_fd, struct dnsfd *dns_fds, struct query *q, int domain_len);
void handle_ns_request(int dns_fd, struct query *q);
void handle_a_request(int dns_fd, struct query *q, int fakeip);