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2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* Copyright (c) 2013, 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* netdb/getaddrinfo.c
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* Network address and service translation.
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*/
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#include <sys/socket.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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static bool linkaddrinfo(struct addrinfo** restrict* res_ptr,
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const struct addrinfo* restrict templ)
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{
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struct addrinfo* link = (struct addrinfo*) calloc(1, sizeof(struct addrinfo));
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if ( !link )
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return false;
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link->ai_flags = templ->ai_flags;
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link->ai_family = templ->ai_family;
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link->ai_socktype = templ->ai_socktype;
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link->ai_protocol = templ->ai_protocol;
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link->ai_addrlen = templ->ai_addrlen;
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link->ai_addr = (struct sockaddr*) malloc(templ->ai_addrlen);
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if ( !link->ai_addr )
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return free(link), false;
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memcpy(link->ai_addr, templ->ai_addr, templ->ai_addrlen);
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link->ai_canonname = templ->ai_canonname ? strdup(templ->ai_canonname) : NULL;
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if ( templ->ai_canonname && !link->ai_canonname )
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return free(link), free(link->ai_addr), false;
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**res_ptr = link;
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*res_ptr = &link->ai_next;
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return true;
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}
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int getaddrinfo(const char* restrict node,
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const char* restrict servname,
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const struct addrinfo* restrict hints,
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struct addrinfo** restrict res)
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{
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struct addrinfo hints_def;
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if ( !hints )
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{
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memset(&hints_def, 0, sizeof(hints_def));
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hints_def.ai_family = AF_UNSPEC;
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hints = &hints_def;
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}
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int socktype = hints->ai_socktype;
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if ( socktype == 0 )
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socktype = SOCK_STREAM;
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in_port_t port = 0;
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if ( servname )
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{
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if ( isspace((unsigned char) servname[0]) )
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return EAI_SERVICE;
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const char* end;
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long portl = strtol(servname, (char**) &end, 10);
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if ( end[0] )
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return EAI_SERVICE;
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if ( (in_port_t) portl != portl )
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return EAI_SERVICE;
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port = portl;
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}
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struct addrinfo** res_orig = res;
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*res = NULL;
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if ( !node )
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{
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bool any = false;
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if ( hints->ai_family == AF_UNSPEC || hints->ai_family == AF_INET )
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{
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any = true;
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struct sockaddr_in sin;
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_port = htons(port);
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memcpy(&sin.sin_addr, "\x7F\x00\x00\x01", 4);
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struct addrinfo templ;
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memset(&templ, 0, sizeof(templ));
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templ.ai_family = sin.sin_family;
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templ.ai_socktype = socktype;
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templ.ai_protocol = hints->ai_protocol;
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templ.ai_addrlen = sizeof(sin);
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templ.ai_addr = (struct sockaddr*) &sin;
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if ( !linkaddrinfo(&res, &templ) )
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return freeaddrinfo(*res_orig), EAI_MEMORY;
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}
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if ( any )
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return 0;
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}
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return EAI_NONAME;
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}
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