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/*
* Configuration parsing for UNIX sockets (bind and server keywords)
*
* Copyright 2000-2020 Willy Tarreau <w@1wt.eu>
*
* 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.
*
*/
#include <ctype.h>
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <haproxy/api.h>
#include <haproxy/arg.h>
#include <haproxy/errors.h>
#include <haproxy/list.h>
#include <haproxy/listener.h>
#include <haproxy/namespace.h>
#include <haproxy/proxy-t.h>
#include <haproxy/server.h>
#include <haproxy/tools.h>
/* parse the "mode" bind keyword */
static int bind_parse_mode(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
char *endptr;
conf->settings.ux.mode = strtol(args[cur_arg + 1], &endptr, 8);
if (!*args[cur_arg + 1] || *endptr) {
memprintf(err, "'%s' : missing or invalid mode '%s' (octal integer expected)", args[cur_arg], args[cur_arg + 1]);
return ERR_ALERT | ERR_FATAL;
}
return 0;
}
/* parse the "gid" bind keyword */
static int bind_parse_gid(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing value", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
conf->settings.ux.gid = atol(args[cur_arg + 1]);
return 0;
}
/* parse the "group" bind keyword */
static int bind_parse_group(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
struct group *group;
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing group name", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
group = getgrnam(args[cur_arg + 1]);
if (!group) {
memprintf(err, "'%s' : unknown group name '%s'", args[cur_arg], args[cur_arg + 1]);
return ERR_ALERT | ERR_FATAL;
}
conf->settings.ux.gid = group->gr_gid;
return 0;
}
/* parse the "uid" bind keyword */
static int bind_parse_uid(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing value", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
conf->settings.ux.uid = atol(args[cur_arg + 1]);
return 0;
}
/* parse the "user" bind keyword */
static int bind_parse_user(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
struct passwd *user;
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing user name", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
user = getpwnam(args[cur_arg + 1]);
if (!user) {
memprintf(err, "'%s' : unknown user name '%s'", args[cur_arg], args[cur_arg + 1]);
return ERR_ALERT | ERR_FATAL;
}
conf->settings.ux.uid = user->pw_uid;
return 0;
}
/* Note: must not be declared <const> as its list will be overwritten.
* Please take care of keeping this list alphabetically sorted, doing so helps
* all code contributors.
* Optional keywords are also declared with a NULL ->parse() function so that
* the config parser can report an appropriate error when a known keyword was
* not enabled.
*/
static struct bind_kw_list bind_kws = { "UNIX", { }, {
{ "gid", bind_parse_gid, 1 }, /* set the socket's gid */
{ "group", bind_parse_group, 1 }, /* set the socket's gid from the group name */
{ "mode", bind_parse_mode, 1 }, /* set the socket's mode (eg: 0644)*/
{ "uid", bind_parse_uid, 1 }, /* set the socket's uid */
{ "user", bind_parse_user, 1 }, /* set the socket's uid from the user name */
{ NULL, NULL, 0 },
}};
INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws);
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