-/* dnsmasq is Copyright (c) 2000-2021 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2022 Simon Kelley
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
/* Declare static char *compiler_opts in config.h */
#define DNSMASQ_COMPILE_OPTS
+/* dnsmasq.h has to be included first as it sources config.h */
#include "dnsmasq.h"
+#if defined(HAVE_IDN) || defined(HAVE_LIBIDN2) || defined(LOCALEDIR)
+#include <locale.h>
+#endif
+
struct daemon *daemon;
static volatile pid_t pid = 0;
int main (int argc, char **argv)
{
- int bind_fallback = 0;
time_t now;
struct sigaction sigact;
struct iname *if_tmp;
int did_bind = 0;
struct server *serv;
char *netlink_warn;
+#else
+ int bind_fallback = 0;
#endif
#if defined(HAVE_DHCP) || defined(HAVE_DHCP6)
struct dhcp_context *context;
int tftp_prefix_missing = 0;
#endif
-#ifdef LOCALEDIR
+#if defined(HAVE_IDN) || defined(HAVE_LIBIDN2) || defined(LOCALEDIR)
setlocale(LC_ALL, "");
+#endif
+#ifdef LOCALEDIR
bindtextdomain("dnsmasq", LOCALEDIR);
textdomain("dnsmasq");
#endif
if (daemon->max_port < daemon->min_port)
die(_("max_port cannot be smaller than min_port"), NULL, EC_BADCONF);
+
+ if (daemon->max_port != 0 &&
+ daemon->max_port - daemon->min_port + 1 < daemon->randport_limit)
+ die(_("port_limit must not be larger than available port range"), NULL, EC_BADCONF);
now = dnsmasq_time();
}
#endif
+#ifdef HAVE_NFTSET
+ if (daemon->nftsets)
+ {
+ nftset_init();
+# ifdef HAVE_LINUX_NETWORK
+ need_cap_net_admin = 1;
+# endif
+ }
+#endif
+
#if defined(HAVE_LINUX_NETWORK)
netlink_warn = netlink_init();
#elif defined(HAVE_BSD_NETWORK)
#if defined(HAVE_LINUX_NETWORK) && defined(HAVE_DHCP)
/* after enumerate_interfaces() */
bound_device = whichdevice();
-
- if (daemon->dhcp)
- {
- if (!daemon->relay4 && bound_device)
- {
- bindtodevice(bound_device, daemon->dhcpfd);
- did_bind = 1;
- }
- if (daemon->enable_pxe && bound_device)
- {
- bindtodevice(bound_device, daemon->pxefd);
- did_bind = 1;
- }
- }
-#endif
-#if defined(HAVE_LINUX_NETWORK) && defined(HAVE_DHCP6)
- if (daemon->doing_dhcp6 && !daemon->relay6 && bound_device)
- {
- bindtodevice(bound_device, daemon->dhcp6fd);
- did_bind = 1;
- }
+ if ((did_bind = bind_dhcp_devices(bound_device)) & 2)
+ die(_("failed to set SO_BINDTODEVICE on DHCP socket: %s"), NULL, EC_BADNET);
#endif
}
else
/* if we are to run scripts, we need to fork a helper before dropping root. */
daemon->helperfd = -1;
#ifdef HAVE_SCRIPT
- if ((daemon->dhcp || daemon->dhcp6 || option_bool(OPT_TFTP) || option_bool(OPT_SCRIPT_ARP)) &&
+ if ((daemon->dhcp ||
+ daemon->dhcp6 ||
+ daemon->relay6 ||
+ option_bool(OPT_TFTP) ||
+ option_bool(OPT_SCRIPT_ARP)) &&
(daemon->lease_change_command || daemon->luascript))
daemon->helperfd = create_helper(pipewrite, err_pipe[1], script_uid, script_gid, max_fd);
#endif
my_syslog(LOG_WARNING, _("warning: failed to change owner of %s: %s"),
daemon->log_file, strerror(log_err));
+#ifndef HAVE_LINUX_NETWORK
if (bind_fallback)
my_syslog(LOG_WARNING, _("setting --bind-interfaces option because of OS limitations"));
+#endif
if (option_bool(OPT_NOWILD))
warn_bound_listeners();
while (1)
{
- int timeout = -1;
+ int timeout = fast_retry(now);
poll_reset();
/* Whilst polling for the dbus, or doing a tftp transfer, wake every quarter second */
- if (daemon->tftp_trans ||
- (option_bool(OPT_DBUS) && !daemon->dbus))
+ if ((daemon->tftp_trans || (option_bool(OPT_DBUS) && !daemon->dbus)) &&
+ (timeout == -1 || timeout > 250))
timeout = 250;
-
+
/* Wake every second whilst waiting for DAD to complete */
- else if (is_dad_listeners())
+ else if (is_dad_listeners() &&
+ (timeout == -1 || timeout > 1000))
timeout = 1000;
-
+
set_dns_listeners();
#ifdef HAVE_DBUS
#endif
#ifdef HAVE_DHCP
+# if defined(HAVE_LINUX_NETWORK)
+ if (bind_dhcp_devices(bound_device) & 2)
+ {
+ static int warned = 0;
+ if (!warned)
+ {
+ my_syslog(LOG_ERR, _("error binding DHCP socket to device %s"), bound_device);
+ warned = 1;
+ }
+ }
+# endif
if (daemon->dhcp || daemon->relay4)
{
poll_listen(daemon->dhcpfd, POLLIN);
while (helper_buf_empty() && do_tftp_script_run());
# endif
+# ifdef HAVE_DHCP6
+ while (helper_buf_empty() && do_snoop_script_run());
+# endif
+
if (!helper_buf_empty())
poll_listen(daemon->helperfd, POLLOUT);
#else
{
/* block in writes until all done */
if ((i = fcntl(daemon->helperfd, F_GETFL)) != -1)
- fcntl(daemon->helperfd, F_SETFL, i & ~O_NONBLOCK);
+ while(retry_send(fcntl(daemon->helperfd, F_SETFL, i & ~O_NONBLOCK)));
do {
helper_write();
} while (!helper_buf_empty() || do_script_run(now));
else
{
res->logged = 0;
- if (force || (statbuf.st_mtime != res->mtime))
+ if (force || (statbuf.st_mtime != res->mtime || statbuf.st_ino != res->ino))
{
res->mtime = statbuf.st_mtime;
+ res->ino = statbuf.st_ino;
if (difftime(statbuf.st_mtime, last_change) > 0.0)
{
last_change = statbuf.st_mtime;
}
else
{
+ /* If we're delaying things, we don't call check_servers(), but
+ reload_servers() may have deleted some servers, rendering the server_array
+ invalid, so just rebuild that here. Once reload_servers() succeeds,
+ we call check_servers() above, which calls build_server_array itself. */
+ build_server_array();
latest->mtime = 0;
if (!warned)
{
attribute from the listening socket.
Reset that here. */
if ((flags = fcntl(confd, F_GETFL, 0)) != -1)
- fcntl(confd, F_SETFL, flags & ~O_NONBLOCK);
+ while(retry_send(fcntl(confd, F_SETFL, flags & ~O_NONBLOCK)));
buff = tcp_request(confd, now, &tcp_addr, netmask, auth_dns);
- shutdown(confd, SHUT_RDWR);
- close(confd);
-
if (buff)
free(buff);
projects / platform / upstream / dnsmasq.git / blobdiff