iOS开发之Bonjour的NSNetService的address解析IP地址与端口

NSNetService的address解析IP地址与端口

- (void)netServiceDidResolveAddress:(NSNetService *)sender{
    NSLog(@"netServiceDidResolveAddress");
    NSData *data = [sender TXTRecordData];
    NSDictionary *info = [NSNetService dictionaryFromTXTRecordData:data];

    NSDictionary *ipInfo = [self parsingIP:sender];
    NSLog(@"parsingIP  : %@", ipInfo);
}

#include <arpa/inet.h>

- (NSDictionary *)parsingIP:(NSNetService *)sender{
    int sPort = 0;
    NSString *ipv4;
    NSString *ipv6;
    
    for (NSData *address in [sender addresses]) {
        typedef union {
            struct sockaddr sa;
            struct sockaddr_in ipv4;
            struct sockaddr_in6 ipv6;
        } ip_socket_address;
        
        struct sockaddr *socketAddr = (struct sockaddr*)[address bytes];
        if(socketAddr->sa_family == AF_INET) {
            sPort = ntohs(((struct sockaddr_in *)socketAddr)->sin_port);
            struct sockaddr_in* pV4Addr = (struct sockaddr_in*)socketAddr;
            int ipAddr = pV4Addr->sin_addr.s_addr;
            char str[INET_ADDRSTRLEN];
            ipv4 = [NSString stringWithUTF8String:inet_ntop( AF_INET, &ipAddr, str, INET_ADDRSTRLEN )];
        }
        
        else if(socketAddr->sa_family == AF_INET6) {
            sPort = ntohs(((struct sockaddr_in6 *)socketAddr)->sin6_port);
            struct sockaddr_in6* pV6Addr = (struct sockaddr_in6*)socketAddr;
            char str[INET6_ADDRSTRLEN];
            ipv6 = [NSString stringWithUTF8String:inet_ntop( AF_INET6, &pV6Addr->sin6_addr, str, INET6_ADDRSTRLEN )];
        }
        else {
            NSLog(@"Socket Family neither IPv4 or IPv6, can't handle...");
        }
    }
    
    NSDictionary *data = @{@"type": [sender type],
                           @"domain": [sender domain],
                           @"name": [sender name],
                           @"ipv4": ipv4,
                           @"ipv6": ipv6,
                           @"port": [NSNumber numberWithInt:sPort]};
    return data;
}

- (void)parsingIP2:(NSNetService *)sender{
    NSLog(@"%@",NSStringFromSelector(_cmd));

    NSLog(@"----netService didResolveAddress %@ %@ %@ %@", sender.name, sender.addresses, sender.hostName, [sender.addresses firstObject]);

    NSArray *addresses  = sender.addresses;
    [sender startMonitoring];

    int port;
    NSString *ip;
    char addressBuffer[INET6_ADDRSTRLEN];
    //服务的IP地址
    for(NSData *data in addresses)
    {
        memset(addressBuffer, 0, INET6_ADDRSTRLEN);

        typedef union {
            struct sockaddr sa;
            struct sockaddr_in ipv4;
            struct sockaddr_in6 ipv6;
        } ip_socket_address;

        ip_socket_address *socketAddress = (ip_socket_address *)[data bytes];

        if (socketAddress && (socketAddress->sa.sa_family == AF_INET || socketAddress->sa.sa_family == AF_INET6))
        {
            const char *addressStr = inet_ntop(
                                               socketAddress->sa.sa_family,
                                               (socketAddress->sa.sa_family == AF_INET ? (void *)&(socketAddress->ipv4.sin_addr) : (void *)&(socketAddress->ipv6.sin6_addr)),
                                               addressBuffer,
                                               sizeof(addressBuffer));

            int port = ntohs(socketAddress->sa.sa_family == AF_INET ? socketAddress->ipv4.sin_port : socketAddress->ipv6.sin6_port);

            if (addressStr && port)
            {
                port = port;
                ip = [NSString stringWithCString:addressStr encoding:NSASCIIStringEncoding];
                NSLog(@"Found service at %s:%d", addressStr, port);
            }
        }
    }
    
}

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