c++ - 如何获取本地网络上所有设备的名称和IP？

我的目标是列出本地网络上所有设备的名称和ips。

list all the computer names on a local network on iPhone类似于此帖子，但未得到回答。

我已经研究过Apple Bonjour，但我认为这不是我所需要的。它不会显示网络上的所有设备。

我也尝试了下面的代码，但是我得到了奇怪的输出（如下）。

int sock;
struct ifconf ifconf;
struct ifreq ifreq[30];
int interfaces;
int i;

// Create a socket or return an error.
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0)
    diep("socket");

// Point ifconf's ifc_buf to our array of interface ifreqs.
ifconf.ifc_buf = (char *) ifreq;

// Set ifconf's ifc_len to the length of our array of interface ifreqs.
ifconf.ifc_len = sizeof ifreq;

//  Populate ifconf.ifc_buf (ifreq) with a list of interface names and addresses.
if (ioctl(sock, SIOCGIFCONF, &ifconf) == -1)
    diep("ioctl");

// Divide the length of the interface list by the size of each entry.
// This gives us the number of interfaces on the system.
interfaces = ifconf.ifc_len / sizeof(ifreq[0]);

// Print a heading that includes the total # of interfaces.
printf("IF(%d)\tIP\n", interfaces);

// Loop through the array of interfaces, printing each one's name and IP.
for (i = 0; i < interfaces; i++) {
    char ip[INET_ADDRSTRLEN];
    struct sockaddr_in *address = (struct sockaddr_in *) &ifreq[i].ifr_addr;

    // Convert the binary IP address into a readable string.
    if (!inet_ntop(AF_INET, &address->sin_addr, ip, sizeof(ip)))
        diep("inet_ntop");

    printf("FOUND: %s\t%s\n", ifreq[i].ifr_name, ip);
}

close(sock);

这是输出，我无法真正理解。

FOUND: lo0  24.3.0.0
FOUND:  28.30.0.0
FOUND:  0.0.0.0
FOUND:  0.0.0.0
FOUND:  0.0.0.1
FOUND: ip0  112.100.112.95
FOUND: pdp_ip1  255.7.0.0
FOUND:  20.18.4.0
FOUND: ip2  0.0.0.0
FOUND: ap1\256\372\272J\221\253 0.0.0.0
FOUND:  105.112.50.0
FOUND:  254.74.145.171
FOUND: ip2  0.0.0.0
FOUND: ip2  101.110.49.142
FOUND: awdl0    6.5.6.0
FOUND: \273Y\311    28.30.0.0

我想看到这样的输出：

My-Mac    192.168.0.21
My-iPad   192.168.0.22
Mum's iPhone 192.168.0.23

使用Objective-C或C ++的解决方案将很有用。谢谢。

最佳答案

只需再次挖这个项目...这是我尝试按@PRSingh的要求共享代码...希望能有所帮助。

在我的.h中定义

 NSNetServiceBrowser *serviceBrowser;
 NSNetService *service;
 NSMutableArray* snames;
 NSMutableArray* sips;
 UIActivityIndicatorView* spinner;

在我的.m中

#pragma mark - NSNetServiceDelegate Methods

- (void)netServiceWillResolve:(NSNetService *)sender {
    NSLog(@"netServiceWillResolve");

    serviceBrowser = [[NSNetServiceBrowser alloc] init];
    if(!serviceBrowser) {
        NSLog(@"The NSNetServiceBrowser couldn't be allocated and initialized.");
    }
    serviceBrowser.delegate = self;
    [serviceBrowser searchForServicesOfType:@"_type._tcp." inDomain:@"local."];
}

- (void)netServiceWillPublish:(NSNetService *)netService
{
    NSLog(@"netServiceWillPublish");
}

- (void)netServiceDidPublish:(NSNetService *)sender {
    NSLog(@"netServiceDidPublish");
}

- (void)netService:(NSNetService *)sender didNotPublish:(NSDictionary *)errorDict {
    NSLog(@"didNotPublish");
}

- (void)netServiceDidResolveAddress:(NSNetService *)netService {
    NSLog(@"netServiceDidResolveAddress");
    for (NSData* data in [netService addresses]) {

        char addressBuffer[100];

        struct sockaddr_in* socketAddress = (struct sockaddr_in*) [data bytes];

        int sockFamily = socketAddress->sin_family;

        if (sockFamily == AF_INET /*|| sockFamily == AF_INET6*/) {

            const char* addressStr = inet_ntop(sockFamily,
                                               &(socketAddress->sin_addr), addressBuffer,
                                               sizeof(addressBuffer));

           // int port = ntohs(socketAddress->sin_port);

            if (addressStr){
                if(![sips containsObject:[NSString stringWithFormat:@"%s",addressStr]]){
                    [snames addObject:netService.name];
                    [sips addObject:[NSString stringWithFormat:@"%s",addressStr]];
                    [self.tableView reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationFade];
                }
            }

        }

    }
}

- (void)netService:(NSNetService *)sender didNotResolve:(NSDictionary *)errorDict {
    NSLog(@"didNotResolve: %@",errorDict);
}

- (void)netService:(NSNetService *)sender didUpdateTXTRecordData:(NSData *)data {
    NSLog(@"didUpdateTXTRecordData");
}

- (void)netServiceDidStop:(NSNetService *)netService {
    NSLog(@"netServiceDidStop");
}

#pragma mark - NSNetServiceBrowserDelegate Methods

- (void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser didFindService:(NSNetService *)netService moreComing:(BOOL)moreServicesComing {
    NSLog(@"didFindService: %@  lenght:%d",netService.name,[netService.name length]);
    [services addObject:netService];
}


- (void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser didRemoveService:(NSNetService *)netService moreComing:(BOOL)moreServicesComing {
    [services removeObject:netService];
    [netService stop];
    int index = [snames indexOfObject:netService.name];
    [snames removeObjectAtIndex:index];
    [sips removeObjectAtIndex:index];
    [self.tableView reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationFade];

    NSLog(@"didRemoveService");
}

为此，我相信网络上的所有设备都必须运行“ _type_.tcp”（或您给它的名字）的“类型”的bonjour。您可以随意使用该类型，以查看本地网络上的哪些设备已经在某些服务类型（https://developer.apple.com/library/mac/qa/qa1312/_index.html）上。

关于c++ - 如何获取本地网络上所有设备的名称和IP？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/13411789/