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1 | office | 1 | /** |
2 | * @file |
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3 | * NETDB API (sockets) |
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4 | */ |
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5 | |||
6 | /* |
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7 | * Redistribution and use in source and binary forms, with or without modification, |
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8 | * are permitted provided that the following conditions are met: |
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9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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13 | * this list of conditions and the following disclaimer in the documentation |
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14 | * and/or other materials provided with the distribution. |
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15 | * 3. The name of the author may not be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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21 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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23 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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25 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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26 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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27 | * OF SUCH DAMAGE. |
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28 | * |
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29 | * This file is part of the lwIP TCP/IP stack. |
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30 | * |
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31 | * Author: Simon Goldschmidt |
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32 | * |
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33 | */ |
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34 | #ifndef LWIP_HDR_NETDB_H |
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35 | #define LWIP_HDR_NETDB_H |
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36 | |||
37 | #include "lwip/opt.h" |
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38 | |||
39 | #if LWIP_DNS && LWIP_SOCKET |
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40 | |||
41 | #include "lwip/arch.h" |
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42 | #include "lwip/inet.h" |
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43 | #include "lwip/sockets.h" |
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44 | |||
45 | #ifdef __cplusplus |
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46 | extern "C" { |
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47 | #endif |
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48 | |||
49 | /* some rarely used options */ |
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50 | #ifndef LWIP_DNS_API_DECLARE_H_ERRNO |
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51 | #define LWIP_DNS_API_DECLARE_H_ERRNO 1 |
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52 | #endif |
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53 | |||
54 | #ifndef LWIP_DNS_API_DEFINE_ERRORS |
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55 | #define LWIP_DNS_API_DEFINE_ERRORS 1 |
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56 | #endif |
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57 | |||
58 | #ifndef LWIP_DNS_API_DEFINE_FLAGS |
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59 | #define LWIP_DNS_API_DEFINE_FLAGS 1 |
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60 | #endif |
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61 | |||
62 | #ifndef LWIP_DNS_API_DECLARE_STRUCTS |
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63 | #define LWIP_DNS_API_DECLARE_STRUCTS 1 |
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64 | #endif |
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65 | |||
66 | #if LWIP_DNS_API_DEFINE_ERRORS |
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67 | /** Errors used by the DNS API functions, h_errno can be one of them */ |
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68 | #define EAI_NONAME 200 |
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69 | #define EAI_SERVICE 201 |
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70 | #define EAI_FAIL 202 |
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71 | #define EAI_MEMORY 203 |
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72 | #define EAI_FAMILY 204 |
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73 | |||
74 | #define HOST_NOT_FOUND 210 |
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75 | #define NO_DATA 211 |
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76 | #define NO_RECOVERY 212 |
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77 | #define TRY_AGAIN 213 |
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78 | #endif /* LWIP_DNS_API_DEFINE_ERRORS */ |
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79 | |||
80 | #if LWIP_DNS_API_DEFINE_FLAGS |
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81 | /* input flags for struct addrinfo */ |
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82 | #define AI_PASSIVE 0x01 |
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83 | #define AI_CANONNAME 0x02 |
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84 | #define AI_NUMERICHOST 0x04 |
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85 | #define AI_NUMERICSERV 0x08 |
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86 | #define AI_V4MAPPED 0x10 |
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87 | #define AI_ALL 0x20 |
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88 | #define AI_ADDRCONFIG 0x40 |
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89 | #endif /* LWIP_DNS_API_DEFINE_FLAGS */ |
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90 | |||
91 | #if LWIP_DNS_API_DECLARE_STRUCTS |
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92 | struct hostent { |
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93 | char *h_name; /* Official name of the host. */ |
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94 | char **h_aliases; /* A pointer to an array of pointers to alternative host names, |
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95 | terminated by a null pointer. */ |
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96 | int h_addrtype; /* Address type. */ |
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97 | int h_length; /* The length, in bytes, of the address. */ |
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98 | char **h_addr_list; /* A pointer to an array of pointers to network addresses (in |
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99 | network byte order) for the host, terminated by a null pointer. */ |
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100 | #define h_addr h_addr_list[0] /* for backward compatibility */ |
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101 | }; |
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102 | |||
103 | struct addrinfo { |
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104 | int ai_flags; /* Input flags. */ |
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105 | int ai_family; /* Address family of socket. */ |
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106 | int ai_socktype; /* Socket type. */ |
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107 | int ai_protocol; /* Protocol of socket. */ |
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108 | socklen_t ai_addrlen; /* Length of socket address. */ |
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109 | struct sockaddr *ai_addr; /* Socket address of socket. */ |
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110 | char *ai_canonname; /* Canonical name of service location. */ |
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111 | struct addrinfo *ai_next; /* Pointer to next in list. */ |
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112 | }; |
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113 | #endif /* LWIP_DNS_API_DECLARE_STRUCTS */ |
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114 | |||
115 | #define NETDB_ELEM_SIZE (sizeof(struct addrinfo) + sizeof(struct sockaddr_storage) + DNS_MAX_NAME_LENGTH + 1) |
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116 | |||
117 | #if LWIP_DNS_API_DECLARE_H_ERRNO |
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118 | /* application accessible error code set by the DNS API functions */ |
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119 | extern int h_errno; |
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120 | #endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/ |
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121 | |||
122 | struct hostent *lwip_gethostbyname(const char *name); |
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123 | int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf, |
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124 | size_t buflen, struct hostent **result, int *h_errnop); |
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125 | void lwip_freeaddrinfo(struct addrinfo *ai); |
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126 | int lwip_getaddrinfo(const char *nodename, |
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127 | const char *servname, |
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128 | const struct addrinfo *hints, |
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129 | struct addrinfo **res); |
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130 | |||
131 | #if LWIP_COMPAT_SOCKETS |
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132 | /** @ingroup netdbapi */ |
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133 | #define gethostbyname(name) lwip_gethostbyname(name) |
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134 | /** @ingroup netdbapi */ |
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135 | #define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \ |
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136 | lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop) |
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137 | /** @ingroup netdbapi */ |
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138 | #define freeaddrinfo(addrinfo) lwip_freeaddrinfo(addrinfo) |
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139 | /** @ingroup netdbapi */ |
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140 | #define getaddrinfo(nodname, servname, hints, res) \ |
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141 | lwip_getaddrinfo(nodname, servname, hints, res) |
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142 | #endif /* LWIP_COMPAT_SOCKETS */ |
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143 | |||
144 | #ifdef __cplusplus |
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145 | } |
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146 | #endif |
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147 | |||
148 | #endif /* LWIP_DNS && LWIP_SOCKET */ |
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149 | |||
150 | #endif /* LWIP_HDR_NETDB_H */ |