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/*
* Copyright (c) 2011, 2012, 2013, 2014, 2015
* Copyright (c) 2011, Jonathan Schleifer <js@webkeks.org>
* Jonathan Schleifer <js@webkeks.org>
* Copyright (c) 2011, Florian Zeitz <florob@babelmonkeys.de>
*
* https://webkeks.org/git/?p=objxmpp.git
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
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#include <arpa/inet.h>
#include <netdb.h>
#include <sys/types.h>
#include <openssl/rand.h>
#import "XMPPSRVLookup.h"
#import <ObjFW/OFSystemInfo.h>
@implementation XMPPSRVEntry
+ (instancetype)entryWithPriority: (uint16_t)priority
weight: (uint16_t)weight
port: (uint16_t)port
target: (OFString*)target
{
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if (dn_expand(ns_msg_base(handle), ns_msg_end(handle),
(uint8_t*)&rdata[3], buffer, NS_MAXDNAME) < 1)
@throw [OFInitializationFailedException
exceptionWithClass: [self class]];
_target = [[OFString alloc]
initWithCString: buffer
encoding: [OFString nativeOSEncoding]];
encoding: [OFSystemInfo native8BitEncoding]];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
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ns_msg handle;
if (res_ninit(&_resState))
@throw [OFAddressTranslationFailedException
exceptionWithHost: _domain];
answer = [self allocMemoryWithSize: pageSize];
answerLen = res_nsearch(&_resState,
[request cStringWithEncoding: [OFString nativeOSEncoding]],
answerLen = res_nsearch(&_resState, [request
cStringWithEncoding: [OFSystemInfo native8BitEncoding]],
ns_c_in, ns_t_srv, answer, (int)pageSize);
if ((answerLen == -1) && ((h_errno == HOST_NOT_FOUND) ||
(h_errno == NO_DATA)))
return;
if (answerLen < 1 || answerLen > pageSize)
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{
OFAutoreleasePool *pool;
OFList *subList;
of_list_object_t *iter;
/* Look if there already is a list with the priority */
for (iter = [_list firstListObject]; iter != NULL; iter = iter->next) {
XMPPSRVEntry *first = [iter->object firstObject];
if ([[iter->object firstObject] priority] == [entry priority]) {
if ([first priority] == [entry priority]) {
/*
* RFC 2782 says those with weight 0 should be at the
* beginning of the list.
*/
if ([entry weight] > 0)
[iter->object appendObject: entry];
else
[iter->object prependObject: entry];
return;
}
/* We can't have one if the priority is already bigger */
if ([[iter->object firstObject] priority] > [entry priority])
if ([first priority] > [entry priority])
break;
}
pool = [[OFAutoreleasePool alloc] init];
subList = [OFList list];
[subList appendObject: entry];
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