nl-list-sockets.c

/* SPDX-License-Identifier: LGPL-2.1-only */
/*
 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
 */
 
#include <netlink/cli/utils.h>
 
#define PROC_NETLINK "/proc/net/netlink"
 
int main(int argc, char *argv[])
{
        FILE *fd;
        char buf[2048], p[64];
 
        fd = fopen(PROC_NETLINK, "re");
        if (fd == NULL) {
                perror("fopen");
                return -1;
        }
 
        printf("Address            Family           PID    Groups   rmem   "
               "wmem   CB         refcnt\n");
 
        while (fgets(buf, sizeof(buf), fd)) {
                unsigned long sk, cb;
                int ret, proto, pid, rmem, wmem, refcnt;
                unsigned int groups;
                
                ret = sscanf(buf, "%lx %d %d %08x %d %d %lx %d\n",
                             &sk, &proto, &pid, &groups, &rmem, &wmem,
                             &cb, &refcnt);
                if (ret != 8)
                        continue;
                
                printf("0x%016lx %-16s %-6d %08x %-6d %-6d 0x%08lx %d\n",
                        sk, nl_nlfamily2str(proto, p, sizeof(p)), pid,
                        groups, rmem, wmem, cb, refcnt);
        }
 
        fclose(fd);
 
        return 0;
}