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Default min-port to 1024 to avoid reserved ports.

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This commit is contained in:
Simon Kelley
2018-01-29 22:49:27 +00:00
parent 486bcd5a7b
commit baf553db0c
5 changed files with 5 additions and 8 deletions
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1
src/dns-protocol.h
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@@ -16,6 +16,7 @@
#define NAMESERVER_PORT 53
#define TFTP_PORT 69
#define MIN_PORT 1024 /* first non-reserved port */
#define MAX_PORT 65535u
#define IN6ADDRSZ 16

3
src/dnsmasq.c
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@@ -224,9 +224,6 @@ int main (int argc, char **argv)
die(_("loop detection not available: set HAVE_LOOP in src/config.h"), NULL, EC_BADCONF);
#endif
if (daemon->max_port != MAX_PORT && daemon->min_port == 0)
daemon->min_port = 1024u;
if (daemon->max_port < daemon->min_port)
die(_("max_port cannot be smaller than min_port"), NULL, EC_BADCONF);

5
src/network.c
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@@ -1149,10 +1149,7 @@ int random_sock(int family)
if (fix_fd(fd))
while(tries--)
{
unsigned short port = rand16();
if (daemon->min_port != 0 || daemon->max_port != MAX_PORT)
port = htons(daemon->min_port + (port % ((unsigned short)ports_avail)));
unsigned short port = htons(daemon->min_port + (rand16() % ((unsigned short)ports_avail)));
if (family == AF_INET)
{

1
src/option.c
View File

@@ -4653,6 +4653,7 @@ void read_opts(int argc, char **argv, char *compile_opts)
daemon->soa_retry = SOA_RETRY;
daemon->soa_expiry = SOA_EXPIRY;
daemon->max_port = MAX_PORT;
daemon->min_port = MIN_PORT;
#ifndef NO_ID
add_txt("version.bind", "dnsmasq-" VERSION, 0 );