/**
* Lookup which process owns the destination port sepcified
* in dpkt->dp.
*/
void lookup_proc(char *buffer, size_t s, struct dispkt *dpkt)
{
char *net_file;
DIR *proc_dir;
FILE *fp;
struct dirent *de;
unsigned long inode = 0, pid;
char linebuf[256], *endptr;
if (!buffer || !dpkt)
return;
*buffer = '\0';
if (dpkt->ip_proto == IPPROTO_TCP) {
if (dpkt->family == AF_INET6)
net_file = "/proc/net/tcp6";
else net_file = "/proc/net/tcp";
} else {
if (dpkt->family == AF_INET6)
net_file = "/proc/net/udp6";
else net_file = "/proc/net/udp";
}
/* Open the file from /proc/net and try to find the inode */
if (!(fp = fopen(net_file, "r")))
return;
while (fgets(linebuf, sizeof(linebuf) - 1, fp)) {
inode = get_inode_for_dest(linebuf, dpkt);
if (inode > 0) break;
}
fclose(fp);
if (!inode)
return;
/* Now that we have the inode, we can probe for the process */
if (!(proc_dir = opendir("/proc")))
return;
while (!*buffer && (de = readdir(proc_dir))) {
/* Make sure we actually have a base-10 numeric string */
pid = strtoul(de->d_name, &endptr, 10);
if (*endptr != '\0')
continue;
process_pid(buffer, s, pid, inode);
}
closedir(proc_dir);
}
void luaopen_lev_process(lua_State *L) {
luaL_newmetatable(L, "lev.process");
luaL_register(L, NULL, methods);
lua_setfield(L, -1, "__index");
lua_createtable(L, 0, ARRAY_SIZE(functions) + PROPERTY_COUNT - 1);
luaL_register(L, NULL, functions);
/* properties */
process_pid(L);
lua_setfield(L, -2, "pid");
process_title(L);
lua_setfield(L, -2, "title");
lua_setfield(L, -2, "process");
}