ios微信支付invalid spbill_create_ip 获取设备ip错误

#import <sys/socket.h>

#import <sys/sockio.h>

#import <sys/ioctl.h>

#import <net/if.h>

#import <arpa/inet.h>

+(NSString *)getDeviceIPAddresses {

int sockfd = socket(AF_INET, SOCK_DGRAM, 0);

NSMutableArray *ips = [NSMutableArray array];

int BUFFERSIZE = 4096;

struct ifconf ifc;

char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;

struct ifreq *ifr, ifrcopy;

ifc.ifc_len = BUFFERSIZE;

ifc.ifc_buf = buffer;

if (ioctl(sockfd, SIOCGIFCONF, &ifc) >= 0){

for (ptr = buffer; ptr < buffer + ifc.ifc_len; ){

ifr = (struct ifreq *)ptr;

int len = sizeof(struct sockaddr);

if (ifr->ifr_addr.sa_len > len) {

len = ifr->ifr_addr.sa_len;

}

ptr += sizeof(ifr->ifr_name) + len;

if (ifr->ifr_addr.sa_family != AF_INET) continue;

if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL) *cptr = 0;

if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0) continue;

memcpy(lastname, ifr->ifr_name, IFNAMSIZ);

ifrcopy = *ifr;

ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);

if ((ifrcopy.ifr_flags & IFF_UP) == 0) continue;

NSString *ip = [NSString stringWithFormat:@"%s", inet_ntoa(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr)];

[ips addObject:ip];

}

}

　 close(sockfd);

NSString *deviceIP = @"";

for (int i=0; i < ips.count; i++) {

if (ips.count > 0) {

deviceIP = [NSString stringWithFormat:@"%@",ips.lastObject];

}

}

return deviceIP;

}