获取网卡地址

这是获取网卡的硬件地址的代码，如果无法编译通过，记得把下面的这几个头文件加上把。

#include // Per msqr

#include

#include

#include

#pragma mark MAC addy

// Return the local MAC addy

// Courtesy of FreeBSD hackers email list

// Accidentally munged during previous update. Fixed thanks to mlamb.

- (NSString *) macaddress

{

int                    mib[6];

size_t                len;

char                *buf;

unsigned char        *ptr;

struct if_msghdr    *ifm;

struct sockaddr_dl    *sdl;

mib[0] = CTL_NET;

mib[1] = AF_ROUTE;

mib[2] = 0;

mib[3] = AF_LINK;

mib[4] = NET_RT_IFLIST;

if ((mib[5] = if_nametoindex("en0")) == 0) {

printf("Error: if_nametoindex error/n");

return NULL;

}

if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {

printf("Error: sysctl, take 1/n");

return NULL;

}

if ((buf = malloc(len)) == NULL) {

printf("Could not allocate memory. error!/n");

return NULL;

}

if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {

printf("Error: sysctl, take 2");

return NULL;

}

ifm = (struct if_msghdr *)buf;

sdl = (struct sockaddr_dl *)(ifm + 1);

ptr = (unsigned char *)LLADDR(sdl);

// NSString *outstring = [NSString stringWithFormat:@"x:x:x:x:x:x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];

NSString *outstring = [NSString stringWithFormat:@"xxxxxx", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];

free(buf);

return [outstring uppercaseString];

}

这写头文件是用于获取ip等系列功能的

#include

#include

#include

#include

#import

#import "wwanconnect.h//frome apple 你可能没有哦

#import

获取ip地址的代码有很多

这是外网可见的ip地址，如果你在小区的局域网中，那就是小区的，不是局域网的内网地址。

- (NSString *) whatismyipdotcom

{

NSError *error;

NSURL *ipURL = [NSURL URLWithString:@"http://www.whatismyip.com/automation/n09230945.asp"];

NSString *ip = [NSString stringWithContentsOfURL:ipURL encoding:1 error:&error];

return ip ? ip : [error localizedDescription];

}

这是获取本地wifi的ip地址

// Matt Brown's get WiFi IP addy solution

// Author gave permission to use in Cookbook under cookbook license

// http://mattbsoftware.blogspot.com/2009/04/how-to-get-ip-address-of-iphone-os-v221.html

- (NSString *) localWiFiIPAddress

{

BOOL success;

struct ifaddrs * addrs;

const struct ifaddrs * cursor;

success = getifaddrs(&addrs) == 0;

if (success) {

cursor = addrs;

while (cursor != NULL) {

// the second test keeps from picking up the loopback address

if (cursor->ifa_addr->sa_family == AF_INET && (cursor->ifa_flags & IFF_LOOPBACK) == 0)

{

NSString *name = [NSString stringWithUTF8String:cursor->ifa_name];

if ([name isEqualToString:@"en0"])  // Wi-Fi adapter

return [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)cursor->ifa_addr)->sin_addr)];

}

cursor = cursor->ifa_next;

}

freeifaddrs(addrs);

}

return nil;

}

NSString和Address的转换

+ (NSString *) stringFromAddress: (const struct sockaddr *) address

{

if(address && address->sa_family == AF_INET) {

const struct sockaddr_in* sin = (struct sockaddr_in*) address;

return [NSString stringWithFormat:@"%@:%d", [NSString stringWithUTF8String:inet_ntoa(sin->sin_addr)], ntohs(sin->sin_port)];

}

return nil;

}

+ (BOOL)addressFromString:(NSString *)IPAddress address:(struct sockaddr_in *)address

{

if (!IPAddress || ![IPAddress length]) {

return NO;

}

memset((char *) address, sizeof(struct sockaddr_in), 0);

address->sin_family = AF_INET;

address->sin_len = sizeof(struct sockaddr_in);

int conversionResult = inet_aton([IPAddress UTF8String], &address->sin_addr);

if (conversionResult == 0) {

NSAssert1(conversionResult != 1, @"Failed to convert the IP address string into a sockaddr_in: %@", IPAddress);

return NO;

}

return YES;

}

获取host的名称

- (NSString *) hostname

{

char baseHostName[256]; // Thanks, Gunnar Larisch

int success = gethostname(baseHostName, 255);

if (success != 0) return nil;

baseHostName[255] = '/0';

#if TARGET_IPHONE_SIMULATOR

return [NSString stringWithFormat:@"%s", baseHostName];

#else

return [NSString stringWithFormat:@"%s.local", baseHostName];

#endif

}

从host获取地址

- (NSString *) getIPAddressForHost: (NSString *) theHost

{

struct hostent *host = gethostbyname([theHost UTF8String]);

if (!host) {herror("resolv"); return NULL; }

struct in_addr **list = (struct in_addr **)host->h_addr_list;

NSString *addressString = [NSString stringWithCString:inet_ntoa(*list[0]) encoding:NSUTF8StringEncoding];

return addressString;

}

这是本地host的IP地址

- (NSString *) localIPAddress

{

struct hostent *host = gethostbyname([[self hostname] UTF8String]);

if (!host) {herror("resolv"); return nil;}

struct in_addr **list = (struct in_addr **)host->h_addr_list;

return [NSString stringWithCString:inet_ntoa(*list[0]) encoding:NSUTF8StringEncoding];

}