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Network link detection in Linux
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| #include <linux/mii.h> | |
| #include <linux/sockios.h> | |
| int check_iface_connected(int *psockfd) | |
| { | |
| struct ifreq ifr; | |
| if (*psockfd == -1) { | |
| *psockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
| } | |
| if (*psockfd != -1) { | |
| memset(&ifr, 0, sizeof(struct ifreq)); | |
| strcpy(ifr.ifr_name, "eth0"); | |
| if (ioctl(*psockfd, SIOCGMIIPHY, &ifr) != -1) { | |
| struct mii_ioctl_data *p_mii_data = (struct mii_ioctl_data *) &(ifr.ifr_data); | |
| p_mii_data->reg_num = MII_BMSR; | |
| if (ioctl(*psockfd, SIOCGMIIREG, &ifr) != -1) { | |
| if (p_mii_data->val_out & BMSR_LSTATUS) { | |
| return TRUE; | |
| } else { | |
| return FALSE; | |
| } | |
| } | |
| } | |
| } | |
| return FAIL; | |
| } |
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