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/*
* Copyright (C) 2014-2021 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "firemon.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <linux/connector.h>
#include <linux/netlink.h>
#include <linux/if_link.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
//#include <net/route.h>
//#include <linux/if_bridge.h>
// print IP addresses for all interfaces
static void net_ifprint(void) {
uint32_t ip;
uint32_t mask;
struct ifaddrs *ifaddr, *ifa;
int fd;
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
fprintf(stderr, "Error: cannot open AF_INET socket\n");
exit(1);
}
if (getifaddrs(&ifaddr) == -1)
errExit("getifaddrs");
// walk through the linked list
printf(" Link status:\n");
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family == AF_PACKET) {
if (ifa->ifa_flags & IFF_RUNNING && ifa->ifa_flags & IFF_UP) {
if (ifa->ifa_data != NULL) {
struct rtnl_link_stats *stats = ifa->ifa_data;
// extract mac address
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ - 1);
int rv = ioctl (fd, SIOCGIFHWADDR, &ifr);
if (rv == 0)
printf(" %s UP, %02x:%02x:%02x:%02x:%02x:%02x\n",
ifa->ifa_name, PRINT_MAC((unsigned char *) &ifr.ifr_hwaddr.sa_data));
else
printf(" %s UP\n", ifa->ifa_name);
printf(" tx/rx: %u/%u packets, %u/%u bytes\n",
stats->tx_packets, stats->rx_packets,
stats->tx_bytes, stats->rx_bytes);
}
}
else
printf(" %s DOWN\n", ifa->ifa_name);
}
}
// walk through the linked list
printf(" IPv4 status:\n");
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family == AF_INET) {
struct sockaddr_in *si = (struct sockaddr_in *) ifa->ifa_netmask;
mask = ntohl(si->sin_addr.s_addr);
si = (struct sockaddr_in *) ifa->ifa_addr;
ip = ntohl(si->sin_addr.s_addr);
char *status;
if (ifa->ifa_flags & IFF_RUNNING && ifa->ifa_flags & IFF_UP)
status = "UP";
else
status = "DOWN";
printf(" %s %s, %d.%d.%d.%d/%u\n",
ifa->ifa_name, status, PRINT_IP(ip), mask2bits(mask));
}
}
// walk through the linked list
printf(" IPv6 status:\n");
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family == AF_INET6) {
char host[NI_MAXHOST];
int s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6),
host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if (s == 0) {
char *ptr;
if ((ptr = strchr(host, '%')) != NULL)
*ptr = '\0';
char *status;
if (ifa->ifa_flags & IFF_RUNNING && ifa->ifa_flags & IFF_UP)
status = "UP";
else
status = "DOWN";
printf(" %s %s, %s\n", ifa->ifa_name, status, host);
}
}
}
freeifaddrs(ifaddr);
close(fd);
}
static void print_sandbox(pid_t pid) {
pid_t child = fork();
if (child == -1)
return;
if (child == 0) {
int rv = join_namespace(pid, "net");
if (rv)
return;
net_ifprint();
#ifdef HAVE_GCOV
__gcov_flush();
#endif
_exit(0);
}
// wait for the child to finish
waitpid(child, NULL, 0);
}
void interface(pid_t pid, int print_procs) {
pid_read(pid); // a pid of 0 will include all processes
// print processes
int i;
for (i = 0; i < max_pids; i++) {
if (pids[i].level == 1) {
if (print_procs || pid == 0)
pid_print_list(i, arg_wrap);
int child = find_child(i);
if (child != -1) {
print_sandbox(child);
}
}
}
printf("\n");
}
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