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Code Issues Releases Wiki Activity

Updated error handling for info_GetLocalInterfaces on linux

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This commit is contained in:
Bryan Roe
2020-12-02 15:46:11 -08:00
parent 16fe75a020
commit 4cc92a2d59
1 changed files with 47 additions and 13 deletions
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60
meshcore/meshinfo.c
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@@ -379,52 +379,86 @@ int info_GetLocalInterfaces(char* data, int maxdata)
if (memcmp(ifr->ifr_name, "lo", 3) == 0) continue; // Loopback
if (adapterCount > 0) { ptr += sprintf_s(data + ptr, maxdata - ptr, ","); }
ptr += sprintf_s(data + ptr, maxdata - ptr, "{");
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, "{")) < 0) { break; }
// Get the name of the interface
ptr += sprintf_s(data + ptr, maxdata - ptr, "\"name\":\"%s\"", ifr->ifr_name);
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, "\"name\":\"%s\"", ifr->ifr_name)) < 0) { break; }
// Get the FQDN (DNS Suffix)
j = info_GetDefaultFqdn(ifr->ifr_name, &gateway);
if (j > 0) { ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"dnssuffix\":\"%s\"", gateway); }
if (j > 0)
{
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"dnssuffix\":\"%s\"", gateway)) < 0)
{
free(gateway);
gateway = NULL;
break;
}
}
if (gateway != NULL) { free(gateway); gateway = NULL; }
// Get the Default Gateway IP address
j = info_GetDefaultGateway(ifr->ifr_name, &gateway);
if (j == 4) { ILibInet_ntop(AF_INET, gateway, temp, 1024); ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"v4gateway\":\"%s\"", temp); }
if (j == 4)
{
ILibInet_ntop(AF_INET, gateway, temp, 1024);
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"v4gateway\":\"%s\"", temp)) < 0)
{
if (gateway != NULL) { free(gateway); gateway = NULL; }
break;
}
}
if (gateway != NULL) { free(gateway); gateway = NULL; }
// Get the Default Gateway MAC address
j = info_GetHwAddress(temp, strlen(temp), &gateway);
if (j == 6) { ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"gatewaymac\":\"%02x%02x%02x%02x%02x%02x\"", (unsigned char)gateway[0], (unsigned char)gateway[1], (unsigned char)gateway[2], (unsigned char)gateway[3], (unsigned char)gateway[4], (unsigned char)gateway[5]); }
if (j == 6)
{
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"gatewaymac\":\"%02x%02x%02x%02x%02x%02x\"", (unsigned char)gateway[0], (unsigned char)gateway[1], (unsigned char)gateway[2], (unsigned char)gateway[3], (unsigned char)gateway[4], (unsigned char)gateway[5])) < 0)
{
if (gateway != NULL) free(gateway);
break;
}
}
if (gateway != NULL) free(gateway);
// Attempt to figure out the interface type
j = 0;
if (strlen(ifr->ifr_name) > 3 && memcmp(ifr->ifr_name, "eth", 3) == 0) { j = 6; }
//if (strlen(ifr->ifr_name) > 2 && memcmp(ifr->ifr_name, "wl", 2) == 0) { j = 6; } // TODO: Wireless
if (j > 0) { ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"type\":\"%d\"", j); }
if (j > 0)
{
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"type\":\"%d\"", j)) < 0) { break; }
}
// Get the hardware MAC address
if (ioctl(sockfd, SIOCGIFHWADDR, ifr) == 0) {
if (ifr->ifr_hwaddr.sa_family == 1) {
ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"mac\":\"%02x%02x%02x%02x%02x%02x\"", (unsigned char)ifr->ifr_hwaddr.sa_data[0], (unsigned char)ifr->ifr_hwaddr.sa_data[1], (unsigned char)ifr->ifr_hwaddr.sa_data[2], (unsigned char)ifr->ifr_hwaddr.sa_data[3], (unsigned char)ifr->ifr_hwaddr.sa_data[4], (unsigned char)ifr->ifr_hwaddr.sa_data[5]);
if (ioctl(sockfd, SIOCGIFHWADDR, ifr) == 0)
{
if (ifr->ifr_hwaddr.sa_family == 1)
{
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"mac\":\"%02x%02x%02x%02x%02x%02x\"", (unsigned char)ifr->ifr_hwaddr.sa_data[0], (unsigned char)ifr->ifr_hwaddr.sa_data[1], (unsigned char)ifr->ifr_hwaddr.sa_data[2], (unsigned char)ifr->ifr_hwaddr.sa_data[3], (unsigned char)ifr->ifr_hwaddr.sa_data[4], (unsigned char)ifr->ifr_hwaddr.sa_data[5])) < 0) { break; }
}
}
// Get the IP address
if (ioctl(sockfd, SIOCGIFADDR, ifr) == 0) { ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"v4addr\":\"%s\"", inet_ntoa(((struct sockaddr_in*)(&(ifr->ifr_addr)))->sin_addr)); }
if (ioctl(sockfd, SIOCGIFADDR, ifr) == 0)
{
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"v4addr\":\"%s\"", inet_ntoa(((struct sockaddr_in*)(&(ifr->ifr_addr)))->sin_addr))) < 0) { break; }
}
// Get the subnet mask
if (ioctl(sockfd, SIOCGIFNETMASK, ifr) == 0) { ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"v4mask\":\"%s\"", inet_ntoa(((struct sockaddr_in*)(&(ifr->ifr_addr)))->sin_addr)); }
if (ioctl(sockfd, SIOCGIFNETMASK, ifr) == 0)
{
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, ",\"v4mask\":\"%s\"", inet_ntoa(((struct sockaddr_in*)(&(ifr->ifr_addr)))->sin_addr))) < 0) { break; }
}
ptr += sprintf_s(data + ptr, maxdata - ptr, "}");
if ((ptr += sprintf_s(data + ptr, maxdata - ptr, "}")) < 0) { break; }
adapterCount++;
}
free(ifc.ifc_req);
close(sockfd);
return ptr;
return(ptr < 0 ? 0 : ptr);
#endif
}
#endif