1 /* 2 * Copyright (c) 2006-2021, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Change Logs: 7 * Date Author Notes 8 * 2018-05-24 ChenYong First version 9 */ 10 #ifndef SAL_NETDB_H__ 11 #define SAL_NETDB_H__ 12 13 #include <stddef.h> 14 #include "sal_socket.h" 15 16 #ifdef __cplusplus 17 extern "C" { 18 #endif 19 20 #define EAI_NONAME 200 21 #define EAI_SERVICE 201 22 #define EAI_FAIL 202 23 #define EAI_MEMORY 203 24 #define EAI_FAMILY 204 25 26 #define HOST_NOT_FOUND 210 27 #define NO_DATA 211 28 #define NO_RECOVERY 212 29 #define TRY_AGAIN 213 30 31 #define AI_PASSIVE 0x01 32 #define AI_CANONNAME 0x02 33 #define AI_NUMERICHOST 0x04 34 #define AI_NUMERICSERV 0x08 35 #define AI_V4MAPPED 0x10 36 #define AI_ALL 0x20 37 #define AI_ADDRCONFIG 0x40 38 39 /* input flags for structure addrinfo */ 40 #define AI_PASSIVE 0x01 41 #define AI_CANONNAME 0x02 42 #define AI_NUMERICHOST 0x04 43 #define AI_NUMERICSERV 0x08 44 #define AI_V4MAPPED 0x10 45 #define AI_ALL 0x20 46 #define AI_ADDRCONFIG 0x40 47 48 #define DNS_MAX_NAME_LENGTH 256 49 50 struct hostent { 51 char *h_name; /* Official name of the host. */ 52 char **h_aliases; /* A pointer to an array of pointers to alternative host names, 53 terminated by a null pointer. */ 54 int h_addrtype; /* Address type. */ 55 int h_length; /* The length, in bytes, of the address. */ 56 char **h_addr_list; /* A pointer to an array of pointers to network addresses (in 57 network byte order) for the host, terminated by a null pointer. */ 58 #define h_addr h_addr_list[0] /* for backward compatibility */ 59 }; 60 61 struct addrinfo { 62 int ai_flags; /* Input flags. */ 63 int ai_family; /* Address family of socket. */ 64 int ai_socktype; /* Socket type. */ 65 int ai_protocol; /* Protocol of socket. */ 66 socklen_t ai_addrlen; /* Length of socket address. */ 67 struct sockaddr *ai_addr; /* Socket address of socket. */ 68 char *ai_canonname; /* Canonical name of service location. */ 69 struct addrinfo *ai_next; /* Pointer to next in list. */ 70 }; 71 72 struct hostent *sal_gethostbyname(const char *name); 73 74 int sal_gethostbyname_r(const char *name, struct hostent *ret, char *buf, 75 size_t buflen, struct hostent **result, int *h_errnop); 76 void sal_freeaddrinfo(struct addrinfo *ai); 77 int sal_getaddrinfo(const char *nodename, 78 const char *servname, 79 const struct addrinfo *hints, 80 struct addrinfo **res); 81 82 #ifdef __cplusplus 83 } 84 #endif 85 86 #endif /* SAL_NETDB_H__ */ 87