49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#include <sys/ioctl.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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char *get_local_ip(void)
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{
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int fd, intrface, retn = 0;
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struct ifreq buf[INET_ADDRSTRLEN];
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struct ifconf ifc;
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char ip[INET_ADDRSTRLEN];
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char *ip_out = NULL;
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if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) >= 0)
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{
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ifc.ifc_len = sizeof(buf);
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ifc.ifc_buf = (caddr_t)buf;
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if (!ioctl(fd, SIOCGIFCONF, (char *)&ifc))
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{
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intrface = ifc.ifc_len / sizeof(struct ifreq);
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ip_out = calloc(intrface, 20);
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snprintf(ip_out, intrface * 20, "IP:");
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while (intrface-- > 0)
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{
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if (!(ioctl(fd, SIOCGIFADDR, (char *)&buf[intrface])))
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{
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inet_ntop(AF_INET,
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&((struct sockaddr_in *)(&buf[intrface].ifr_addr))->sin_addr,
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ip, INET_ADDRSTRLEN);
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if (strcmp(ip, "127.0.0.1") != 0)
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{
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strcat(ip_out, ip);
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if (intrface > 1)
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strcat(ip_out, ",");
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}
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}
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}
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}
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close(fd);
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}
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return ip_out;
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}
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