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add --tftp-no-fail to ignore missing tftp root

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This commit is contained in:
Stefan Tomanek
2015-03-31 22:32:11 +01:00
committed by Simon Kelley
parent fd6ad9e481
commit 30d0879ed5
6 changed files with 45 additions and 11 deletions
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40
src/dnsmasq.c
View File

@@ -58,6 +58,9 @@ int main (int argc, char **argv)
struct dhcp_context *context;
struct dhcp_relay *relay;
#endif
#ifdef HAVE_TFTP
int tftp_prefix_missing = 0;
#endif
#ifdef LOCALEDIR
setlocale(LC_ALL, "");
@@ -636,7 +639,7 @@ int main (int argc, char **argv)
#endif
#ifdef HAVE_TFTP
if (option_bool(OPT_TFTP))
if (option_bool(OPT_TFTP))
{
DIR *dir;
struct tftp_prefix *p;
@@ -645,24 +648,33 @@ int main (int argc, char **argv)
{
if (!((dir = opendir(daemon->tftp_prefix))))
{
send_event(err_pipe[1], EVENT_TFTP_ERR, errno, daemon->tftp_prefix);
_exit(0);
tftp_prefix_missing = 1;
if (!option_bool(OPT_TFTP_NO_FAIL))
{
send_event(err_pipe[1], EVENT_TFTP_ERR, errno, daemon->tftp_prefix);
_exit(0);
}
}
closedir(dir);
}
for (p = daemon->if_prefix; p; p = p->next)
{
p->missing = 0;
if (!((dir = opendir(p->prefix))))
{
send_event(err_pipe[1], EVENT_TFTP_ERR, errno, p->prefix);
_exit(0);
}
{
p->missing = 1;
if (!option_bool(OPT_TFTP_NO_FAIL))
{
send_event(err_pipe[1], EVENT_TFTP_ERR, errno, p->prefix);
_exit(0);
}
}
closedir(dir);
}
}
#endif
if (daemon->port == 0)
my_syslog(LOG_INFO, _("started, version %s DNS disabled"), VERSION);
else if (daemon->cachesize != 0)
@@ -772,7 +784,8 @@ int main (int argc, char **argv)
#ifdef HAVE_TFTP
if (option_bool(OPT_TFTP))
{
{
struct tftp_prefix *p;
#ifdef FD_SETSIZE
if (FD_SETSIZE < (unsigned)max_fd)
max_fd = FD_SETSIZE;
@@ -782,7 +795,14 @@ int main (int argc, char **argv)
daemon->tftp_prefix ? _("root is ") : _("enabled"),
daemon->tftp_prefix ? daemon->tftp_prefix: "",
option_bool(OPT_TFTP_SECURE) ? _("secure mode") : "");
if (tftp_prefix_missing)
my_syslog(MS_TFTP | LOG_WARNING, _("warning: %s inaccessible"), daemon->tftp_prefix);
for (p = daemon->if_prefix; p; p = p->next)
if (p->missing)
my_syslog(MS_TFTP | LOG_WARNING, _("warning: TFTP directory %s inaccessible"), p->prefix);
/* This is a guess, it assumes that for small limits,
disjoint files might be served, but for large limits,
a single file will be sent to may clients (the file only needs

4
src/dnsmasq.h
View File

@@ -240,7 +240,8 @@ struct event_desc {
#define OPT_LOCAL_SERVICE 49
#define OPT_LOOP_DETECT 50
#define OPT_EXTRALOG 51
#define OPT_LAST 52
#define OPT_TFTP_NO_FAIL 52
#define OPT_LAST 53
/* extra flags for my_syslog, we use a couple of facilities since they are known
not to occupy the same bits as priorities, no matter how syslog.h is set up. */
@@ -901,6 +902,7 @@ struct addr_list {
struct tftp_prefix {
char *interface;
char *prefix;
int missing;
struct tftp_prefix *next;
};

3
src/option.c
View File

@@ -153,6 +153,7 @@ struct myoption {
#define LOPT_DHOPT_INOTIFY 341
#define LOPT_HOST_INOTIFY 342
#define LOPT_DNSSEC_STAMP 343
#define LOPT_TFTP_NO_FAIL 344
#ifdef HAVE_GETOPT_LONG
static const struct option opts[] =
@@ -235,6 +236,7 @@ static const struct myoption opts[] =
{ "dhcp-ignore-names", 2, 0, LOPT_NO_NAMES },
{ "enable-tftp", 2, 0, LOPT_TFTP },
{ "tftp-secure", 0, 0, LOPT_SECURE },
{ "tftp-no-fail", 0, 0, LOPT_TFTP_NO_FAIL },
{ "tftp-unique-root", 0, 0, LOPT_APREF },
{ "tftp-root", 1, 0, LOPT_PREFIX },
{ "tftp-max", 1, 0, LOPT_TFTP_MAX },
@@ -419,6 +421,7 @@ static struct {
{ LOPT_PREFIX, ARG_DUP, "<dir>[,<iface>]", gettext_noop("Export files by TFTP only from the specified subtree."), NULL },
{ LOPT_APREF, OPT_TFTP_APREF, NULL, gettext_noop("Add client IP address to tftp-root."), NULL },
{ LOPT_SECURE, OPT_TFTP_SECURE, NULL, gettext_noop("Allow access only to files owned by the user running dnsmasq."), NULL },
{ LOPT_TFTP_NO_FAIL, OPT_TFTP_NO_FAIL, NULL, gettext_noop("Do not terminate the service if TFTP directories are inaccessible."), NULL },
{ LOPT_TFTP_MAX, ARG_ONE, "<integer>", gettext_noop("Maximum number of conncurrent TFTP transfers (defaults to %s)."), "#" },
{ LOPT_NOBLOCK, OPT_TFTP_NOBLOCK, NULL, gettext_noop("Disable the TFTP blocksize extension."), NULL },
{ LOPT_TFTP_LC, OPT_TFTP_LC, NULL, gettext_noop("Convert TFTP filenames to lowercase"), NULL },