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linux implementaiton of zerotier-cli dump

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This commit is contained in:
Grant Limberg 2020-08-30 14:19:56 -07:00
parent fa86b8bae0
commit a1f4397959
1 changed files with 78 additions and 1 deletions
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79
one.cpp
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@ -47,6 +47,11 @@
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <sys/ioctl.h>
#ifndef ZT_NO_CAPABILITIES
#include <linux/capability.h>
#include <linux/securebits.h>
@ -1044,9 +1049,81 @@ static int cli(int argc,char **argv)
free(addresses);
addresses = NULL;
}
#elif defined(__LINUX__)
struct ifreq ifr;
struct ifconf ifc;
char buf[1024];
char stringBuffer[128];
int success = 0;
int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
ifc.ifc_len = sizeof(buf);
ifc.ifc_buf = buf;
ioctl(sock, SIOCGIFCONF, &ifc);
struct ifreq *it = ifc.ifc_req;
const struct ifreq * const end = it + (ifc.ifc_len / sizeof(struct ifreq));
int count = 0;
for(; it != end; ++it) {
strcpy(ifr.ifr_name, it->ifr_name);
if(ioctl(sock, SIOCGIFFLAGS, &ifr) == 0) {
if (!(ifr.ifr_flags & IFF_LOOPBACK)) { // skip loopback
dump << "Interface " << count++ << ZT_EOL_S << "-----------" << ZT_EOL_S;
dump << "Name: " << ifr.ifr_name << ZT_EOL_S;
if (ioctl(sock, SIOCGIFMTU, &ifr) == 0) {
dump << "MTU: " << ifr.ifr_mtu << ZT_EOL_S;
}
if (ioctl(sock, SIOCGIFHWADDR, &ifr) == 0) {
unsigned char mac_addr[6];
memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6);
char macStr[16];
sprintf(macStr, "%02x:%02x:%02x:%02x:%02x:%02x",
mac_addr[0],
mac_addr[1],
mac_addr[2],
mac_addr[3],
mac_addr[4],
mac_addr[5]);
dump << "MAC: " << macStr << ZT_EOL_S;
}
dump << "Addresses: " << ZT_EOL_S;
struct ifaddrs *ifap, *ifa;
void *addr;
getifaddrs(&ifap);
for(ifa = ifap; ifa; ifa = ifa->ifa_next) {
if(strcmp(ifr.ifr_name, ifa->ifa_name) == 0) {
if(ifa->ifa_addr->sa_family == AF_INET) {
struct sockaddr_in *ipv4 = (struct sockaddr_in*)ifa->ifa_addr;
addr = &ipv4->sin_addr;
} else if (ifa->ifa_addr->sa_family == AF_INET6) {
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6*)ifa->ifa_addr;
addr = &ipv6->sin6_addr;
} else {
continue;
}
inet_ntop(ifa->ifa_addr->sa_family, addr, stringBuffer, sizeof(stringBuffer));
dump << stringBuffer << ZT_EOL_S;
}
}
}
}
}
close(sock);
char cwd[PATH_MAX];
getcwd(cwd, sizeof(cwd));
sprintf(cwd, "%s%szerotier_dump.txt", cwd, ZT_PATH_SEPARATOR_S);
fprintf(stdout, "Writing dump to: %s\n", cwd);
int fd = open(cwd, O_CREAT|O_RDWR,0664);
if (fd == -1) {
fprintf(stderr, "Error creating file.\n");
}
write(fd, dump.str().c_str(), dump.str().size());
close(fd);
#endif
fprintf(stderr, "%s\n", dump.str().c_str());
// fprintf(stderr, "%s\n", dump.str().c_str());
} else {
cliPrintHelp(argv[0],stderr);