static void nlmsg_print(uint16_t family, struct nlmsghdr *hdr)
{
u16 nlmsg_flags = hdr->nlmsg_flags;
char type[32];
char flags[128];
char procname[PATH_MAX];
/* Look up the process name if message is not coming from the kernel.
*
* Note that the port id is not necessarily equal to the PID of the
* receiving process (e.g. if the application is multithreaded or using
* multiple sockets). In these cases we're not able to find a matching
* PID and the information will not be printed.
*/
if (hdr->nlmsg_pid != 0) {
if (proc_get_cmdline(hdr->nlmsg_pid, procname, sizeof(procname)) < 0)
snprintf(procname, sizeof(procname), "unknown process");
} else
snprintf(procname, sizeof(procname), "kernel");
tprintf(" [ NLMSG ");
tprintf("Family %d (%s%s%s), ", family,
colorize_start(bold),
nlmsg_family2str(family),
colorize_end());
tprintf("Len %u, ", hdr->nlmsg_len);
tprintf("Type 0x%.4x (%s%s%s), ", hdr->nlmsg_type,
colorize_start(bold),
nlmsg_type2str(family, hdr->nlmsg_type, type, sizeof(type)),
colorize_end());
tprintf("Flags 0x%.4x (%s%s%s), ", nlmsg_flags,
colorize_start(bold),
nlmsg_flags ? nl_nlmsg_flags2str(nlmsg_flags, flags, sizeof(flags)) : "none",
colorize_end());
tprintf("Seq-Nr %u, ", hdr->nlmsg_seq);
tprintf("PID %u", hdr->nlmsg_pid);
if (procname[0])
tprintf(" (%s%s%s)", colorize_start(bold), basename(procname),
colorize_end());
tprintf(" ]\n");
switch (family) {
case NETLINK_ROUTE:
rtnl_msg_print(hdr);
break;
case NETLINK_GENERIC:
genl_msg_print(hdr);
break;
default:
nlmsg_print_raw(hdr);
}
}
int proc_find_by_inode(ino_t ino, char *cmdline, size_t len, pid_t *pid)
{
struct dirent *ent;
DIR *dir;
if (ino <= 0) {
cmdline[0] = '\0';
return 0;
}
dir = opendir("/proc");
if (!dir)
panic("Cannot open /proc: %s\n", strerror(errno));
while ((ent = readdir(dir))) {
int ret;
char *end;
const char *name = ent->d_name;
pid_t cur_pid = strtoul(name, &end, 10);
/* not a PID */
if (cur_pid == 0 && end == name)
continue;
ret = match_pid_by_inode(cur_pid, ino);
if (!ret) {
ret = proc_get_cmdline(cur_pid, cmdline, len);
if (ret < 0)
panic("Failed to get process cmdline: %s\n", strerror(errno));
closedir(dir);
*pid = cur_pid;
return ret;
}
}
closedir(dir);
return -1;
}
