86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
#ifndef REQUEST_H
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#define REQUEST_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include "buffer.h"
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enum socks_req_cmd {
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socks_req_cmd_connect = 0x01,
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socks_req_cmd_bind = 0x02,
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socks_req_cmd_associate = 0x03,
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};
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enum socks_addr_type {
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socks_req_addr_ipv4 = 0x01,
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socks_req_addr_domain = 0x03,
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socks_req_addr_ipv6 = 0x04,
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};
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union socks_addr {
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char fqdn[0xff];
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struct sockaddr_in ipv4;
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struct sockaddr_in6 ipv6;
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};
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struct request {
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enum socks_req_cmd cmd;
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enum socks_addr_type dest_addr_type;
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union socks_addr dest_addr;
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in_port_t dest_port;
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};
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enum request_state {
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request_version,
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request_cmd,
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request_rsv,
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request_atyp,
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request_dstaddr_fqdn,
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request_dstaddr,
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request_dstport,
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request_done,
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request_error,
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request_error_unsupported_version,
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request_error_unsupported_atyp,
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};
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struct request_parser {
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struct request * request;
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enum request_state state;
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uint8_t n;
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uint8_t i;
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};
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enum socks_response_status {
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status_succeeded = 0x00,
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status_general_SOCKS_server_failure = 0x01,
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status_connection_not_allowed_by_ruleset = 0x02,
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status_network_unreachable = 0x03,
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status_host_unreachable = 0x04,
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status_connection_refused = 0x05,
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status_ttl_expired = 0x06,
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status_command_not_supported = 0x07,
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status_address_type_not_supported = 0x08,
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};
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void request_parser_init(struct request_parser * p);
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enum request_state request_consume(buffer * b, struct request_parser * p, bool * errored);
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bool request_is_done(const enum request_state state, bool * errored);
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void request_close(struct request_parser *p);
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extern int request_marshall(buffer * b, const enum socks_response_status status);
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enum socks_response_status errno_to_socks(int e);
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enum socks_response_status cmd_resolve(struct request * request, struct sockaddr ** originaddr, socklen_t * origin_len, int * domain);
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#endif
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