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A SystemTap script listing all currently assigned IP addresses in all networking namespaces
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| /* | |
| * global_ip_list.stp | |
| * Author: Robert Thomas Manes <[email protected]> | |
| * | |
| * With special thanks to Sterling Alexander and Kyle Walker. | |
| * | |
| * This systemtap script lists all currently assigned IP addresses in | |
| * all network namespaces on the system in which it is run. | |
| * | |
| * It is currently only tested on Red Hat Enterprise Linux 7. | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| * | |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| */ | |
| /* | |
| * It's vital to replace this net_namespace_list with your actual address | |
| * for namespaces. To get the proper address, pull it from the symbol table | |
| * like so: | |
| * | |
| * # grep 'D net_namespace_list' /proc/kallsyms | awk '{print $1}' | |
| */ | |
| global net_namespace_list = 0xffffffff91712ac0; | |
| probe begin { | |
| printf("Listing all available IP addresses regardless of network namespace...\n"); | |
| list_addresses_per_namespace(); | |
| exit(); | |
| } | |
| probe end { | |
| printf("Done.\n"); | |
| } | |
| function list_addresses_per_namespace() { | |
| net_list_head = @cast(net_namespace_list, "list_head")->next; | |
| net_list_cur = net_list_head; | |
| // walk namespace list | |
| for(;@cast(net_list_cur, "list_head")->next != net_list_head;) { | |
| namespace = & @container_of(net_list_cur, "struct net", list); | |
| if(net_list_cur == net_namespace_list) { | |
| continue; | |
| } | |
| printf("Namespace 0x%x\n", namespace); | |
| dev_head = @cast(namespace, "net")->dev_base_head->next; | |
| dev_cur = @cast(dev_head, "list_head")->next; | |
| // walk device list | |
| for(;dev_head != dev_cur;) { | |
| netdev = & @container_of(dev_cur, "struct net_device", dev_list); | |
| netdev_name = kernel_string(@cast(netdev, "net_device")->name); | |
| printf(" %s\n", netdev_name); | |
| // From the net_device, grab the ip_ptr which contains the ifa_list | |
| ip_ptr = @cast(netdev, "net_device")->ip_ptr; | |
| if(ip_ptr != 0x0) | |
| { | |
| ifa_list = @cast(ip_ptr, "in_device")->ifa_list; | |
| for(;ifa_list != 0x0;) | |
| { | |
| addr = @cast(ifa_list, "in_ifaddr")->ifa_address; | |
| printf(" %s\n", format_ipaddr(addr, 2)); | |
| ifa_list = @cast(ifa_list, "in_ifaddr")->ifa_next; | |
| } | |
| } | |
| dev_cur = @cast(dev_cur, "list_head")->next; | |
| } | |
| net_list_cur = @cast(net_list_cur, "list_head")->next; | |
| } | |
| } |
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