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DNS: support parser TYPE65 RR.

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This commit is contained in:
Nick Peng
2022-12-03 14:28:45 +08:00
parent 410047822d
commit dad31179d2
3 changed files with 516 additions and 5 deletions
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62
src/dns.h
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@@ -73,13 +73,25 @@ typedef enum dns_type {
} dns_type_t;
typedef enum dns_opt_code {
DNS_OPT_T_ECS = 8, // OPT ECS
DNS_OPT_T_COOKIE = 10, //OPT Cookie
DNS_OPT_T_ECS = 8, // OPT ECS
DNS_OPT_T_COOKIE = 10, // OPT Cookie
DNS_OPT_T_TCP_KEEPALIVE = 11,
DNS_OPT_T_PADDING = 12,
DNS_OPT_T_ALL = 255
} dns_opt_code_t;
/* https://datatracker.ietf.org/doc/draft-ietf-dnsop-svcb-https/11/ */
typedef enum dns_htts_svcparam {
DNS_HTTPS_T_MANDATORY = 0,
DNS_HTTPS_T_ALPN = 1,
DNS_HTTPS_T_NO_DEFAULT_ALPN = 2,
DNS_HTTPS_T_PORT = 3,
DNS_HTTPS_T_IPV4HINT = 4,
DNS_HTTPS_T_ECH = 5,
DNS_HTTPS_T_IPV6HINT = 6,
DNS_HTTPS_T_ALL = 255
} dns_htts_svcparam_t;
typedef enum dns_opcode {
DNS_OP_QUERY = 0,
DNS_OP_IQUERY = 1,
@@ -184,7 +196,7 @@ struct dns_opt_ecs {
unsigned char source_prefix;
unsigned char scope_prefix;
unsigned char addr[DNS_RR_AAAA_LEN];
} __attribute__((packed));;
} __attribute__((packed));
/* OPT COOLIE */
struct dns_opt_cookie {
@@ -200,9 +212,31 @@ struct dns_opt {
unsigned char data[0];
} __attribute__((packed));
struct dns_rr_nested {
struct dns_context context;
unsigned char *rr_start;
unsigned char *rr_len_ptr;
unsigned short rr_head_len;
dns_rr_type type;
};
struct dns_https_param {
unsigned short key;
unsigned short len;
unsigned char value[0];
};
struct dns_rrs *dns_get_rrs_next(struct dns_packet *packet, struct dns_rrs *rrs);
struct dns_rrs *dns_get_rrs_start(struct dns_packet *packet, dns_rr_type type, int *count);
struct dns_rr_nested *dns_add_rr_nested_start(struct dns_rr_nested *rr_nested_buffer, struct dns_packet *packet,
dns_rr_type type, dns_type_t rtype, const char *domain, int ttl);
int dns_add_rr_nested_end(struct dns_rr_nested *rr_nested, dns_type_t rtype);
int dns_add_rr_nested_memcpy(struct dns_rr_nested *rr_nested, void *data, int data_len);
void *dns_get_rr_nested_start(struct dns_rrs *rrs, char *domain, int maxsize, int *qtype, int *ttl, int *rr_len);
void *dns_get_rr_nested_next(struct dns_rrs *rrs, void *rr_nested, int rr_nested_len);
/*
* Question
*/
@@ -215,7 +249,8 @@ int dns_get_domain(struct dns_rrs *rrs, char *domain, int maxsize, int *qtype, i
int dns_add_CNAME(struct dns_packet *packet, dns_rr_type type, const char *domain, int ttl, const char *cname);
int dns_get_CNAME(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, char *cname, int cname_size);
int dns_add_A(struct dns_packet *packet, dns_rr_type type, const char *domain, int ttl, unsigned char addr[DNS_RR_A_LEN]);
int dns_add_A(struct dns_packet *packet, dns_rr_type type, const char *domain, int ttl,
unsigned char addr[DNS_RR_A_LEN]);
int dns_get_A(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, unsigned char addr[DNS_RR_A_LEN]);
int dns_add_PTR(struct dns_packet *packet, dns_rr_type type, const char *domain, int ttl, char *cname);
@@ -240,6 +275,25 @@ int dns_get_OPT_ECS(struct dns_rrs *rrs, unsigned short *opt_code, unsigned shor
int dns_add_OPT_TCP_KEEYALIVE(struct dns_packet *packet, unsigned short timeout);
int dns_get_OPT_TCP_KEEYALIVE(struct dns_rrs *rrs, unsigned short *opt_code, unsigned short *opt_len,
unsigned short *timeout);
int dns_add_HTTPS_start(struct dns_rr_nested *svcparam_buffer, struct dns_packet *packet,
dns_rr_type type, const char *domain, int ttl, int priority,
const char *target);
int dns_HTTPS_add_raw(struct dns_rr_nested *svcparam, unsigned short key, unsigned char *value, unsigned short len);
int dns_HTTPS_add_port(struct dns_rr_nested *svcparam, unsigned short port);
int dns_HTTPS_add_alpn(struct dns_rr_nested *svcparam, const char *alpn);
int dns_HTTPS_add_no_default_alpn(struct dns_rr_nested *svcparam);
int dns_HTTPS_add_ipv4hint(struct dns_rr_nested *svcparam, unsigned char addr[][DNS_RR_A_LEN],
int addr_num);
int dns_HTTPS_add_ipv6hint(struct dns_rr_nested *svcparam, unsigned char addr[][DNS_RR_AAAA_LEN],
int addr_num);
int dns_HTTPS_add_ech(struct dns_rr_nested *svcparam, void *ech, int ech_len);
int dns_add_HTTPS_end(struct dns_rr_nested *svcparam);
struct dns_https_param *dns_get_HTTPS_svcparm_start(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl,
int *priority, char *target, int target_size);
struct dns_https_param *dns_get_HTTPS_svcparm_next(struct dns_rrs *rrs, struct dns_https_param *parm);
/*
* Packet operation
*/