转载自：http://blog.csdn.net/showhilllee/article/details/8746114
貌似ASI里获取ip地址的链接不能够了。也曾试过whatismyip，在其站点上的截图获取的ip是正确的，单不知道为什么在我这里却是错误的。所以，在这里分享一下获得手机ip的方法。
代码最初源自老外，通过系统提供的api获取的，这里我就直接贴代码了：
在创建的获得ip类的头文件中：
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#define MAXADDRS 32
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extern char *if_names[MAXADDRS];
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extern char *ip_names[MAXADDRS];
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extern char *hw_addrs[MAXADDRS];
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extern unsigned long ip_addrs[MAXADDRS];
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void InitAddresses();
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void FreeAddresses();
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void GetIPAddresses();
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void GetHWAddresses();
实现文件中：
先导入文件
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <sys/sockio.h>
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#include <net/if.h>
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#include <errno.h>
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#include <net/if_dl.h>
详细实现的代码
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#define max(a,b) ((a) > (b) ? (a) : (b))
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#define BUFFERSIZE 4000
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char *if_names[MAXADDRS];
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char *ip_names[MAXADDRS];
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char *hw_addrs[MAXADDRS];
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unsigned long ip_addrs[MAXADDRS];
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static int nextAddr = 0;
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void InitAddresses()
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{
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int i;
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for (i=0; i<MAXADDRS; ++i)
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{
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if_names[i] = ip_names[i] = hw_addrs[i] = NULL;
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ip_addrs[i] = 0;
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}
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}
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void FreeAddresses()
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{
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int i;
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for (i=0; i<MAXADDRS; ++i)
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{
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if (if_names[i] != 0) free(if_names[i]);
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if (ip_names[i] != 0) free(ip_names[i]);
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if (hw_addrs[i] != 0) free(hw_addrs[i]);
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ip_addrs[i] = 0;
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}
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InitAddresses();
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}
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void GetIPAddresses()
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{
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int i, len, flags;
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char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;
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struct ifconf ifc;
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struct ifreq *ifr, ifrcopy;
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struct sockaddr_in *sin;
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char temp[80];
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int sockfd;
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for (i=0; i<MAXADDRS; ++i)
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{
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if_names[i] = ip_names[i] = NULL;
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ip_addrs[i] = 0;
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}
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sockfd = socket(AF_INET, SOCK_DGRAM, 0);
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if (sockfd < 0)
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{
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perror("socket failed");
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return;
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}
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ifc.ifc_len = BUFFERSIZE;
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ifc.ifc_buf = buffer;
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if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0)
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{
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perror("ioctl error");
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return;
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}
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lastname[0] = 0;
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for (ptr = buffer; ptr < buffer + ifc.ifc_len; )
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{
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ifr = (struct ifreq *)ptr;
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len = max(sizeof(struct sockaddr), ifr->ifr_addr.sa_len);
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ptr += sizeof(ifr->ifr_name) + len;
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if (ifr->ifr_addr.sa_family != AF_INET)
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{
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continue;
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}
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if ((cptr = (char *)strchr(ifr->ifr_name, ‘:‘)) != NULL)
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{
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*cptr = 0;
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}
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if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0)
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{
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continue;
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}
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memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
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ifrcopy = *ifr;
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ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
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flags = ifrcopy.ifr_flags;
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if ((flags & IFF_UP) == 0)
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{
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continue;
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}
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if_names[nextAddr] = (char *)malloc(strlen(ifr->ifr_name)+1);
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if (if_names[nextAddr] == NULL)
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{
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return;
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}
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strcpy(if_names[nextAddr], ifr->ifr_name);
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sin = (struct sockaddr_in *)&ifr->ifr_addr;
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strcpy(temp, inet_ntoa(sin->sin_addr));
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ip_names[nextAddr] = (char *)malloc(strlen(temp)+1);
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if (ip_names[nextAddr] == NULL)
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{
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return;
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}
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strcpy(ip_names[nextAddr], temp);
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ip_addrs[nextAddr] = sin->sin_addr.s_addr;
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++nextAddr;
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}
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close(sockfd);
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}
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void GetHWAddresses()
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{
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struct ifconf ifc;
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struct ifreq *ifr;
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int i, sockfd;
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char buffer[BUFFERSIZE], *cp, *cplim;
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char temp[80];
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for (i=0; i<MAXADDRS; ++i)
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{
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hw_addrs[i] = NULL;
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}
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sockfd = socket(AF_INET, SOCK_DGRAM, 0);
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if (sockfd < 0)
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{
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perror("socket failed");
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return;
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}
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ifc.ifc_len = BUFFERSIZE;
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ifc.ifc_buf = buffer;
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if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0)
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{
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perror("ioctl error");
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close(sockfd);
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return;
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}
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ifr = ifc.ifc_req;
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cplim = buffer + ifc.ifc_len;
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for (cp=buffer; cp < cplim; )
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{
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ifr = (struct ifreq *)cp;
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if (ifr->ifr_addr.sa_family == AF_LINK)
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{
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struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr;
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int a,b,c,d,e,f;
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int i;
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strcpy(temp, (char *)ether_ntoa(LLADDR(sdl)));
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sscanf(temp, "%x:%x:%x:%x:%x:%x", &a, &b, &c, &d, &e, &f);
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sprintf(temp, "%02X:%02X:%02X:%02X:%02X:%02X",a,b,c,d,e,f);
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for (i=0; i<MAXADDRS; ++i)
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{
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if ((if_names[i] != NULL) && (strcmp(ifr->ifr_name,if_names[i]) == 0))
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{
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if (hw_addrs[i] == NULL)
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{
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hw_addrs[i] = (char *)malloc(strlen(temp)+1);
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strcpy(hw_addrs[i], temp);
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break;
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}
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}
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}
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}
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cp += sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len);
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}
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close(sockfd);
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}
然后就是调用了。首先在我们的类里面导入上面那个类。之后在实现文件中写函数
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- (NSString *)deviceIPAdress {
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InitAddresses();
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GetIPAddresses();
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GetHWAddresses();
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return [NSString stringWithFormat:@"%s", ip_names[1]];
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}
然后在我们须要获得ip的地方写上
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NSString* myip = [self deviceIPAdress];
这里的myip就是我们须要的ip地址了
手机截图
程序打印截图
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