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Remove addr_port_lookup.

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This lets us cut the dependency from address.c to resolve.c: the
address.c module now has no paths to the libc resolver in it.
This commit is contained in:
Nick Mathewson 2018-07-10 13:30:44 -04:00
parent 2f657a1416
commit 8de48c111c
2 changed files with 12 additions and 34 deletions
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4
changes/ticket26526 Normal file
View File

@ -0,0 +1,4 @@
o Code simplification and refactoring:
- Utility functions that can perform a DNS lookup are now wholly
separated from those that can't, in separate headers and C
modules. Closes ticket 26526.

42
src/lib/net/address.c
View File

@ -6,6 +6,9 @@
/**
* \file address.c
* \brief Functions to use and manipulate the tor_addr_t structure.
*
* This module doesn't have any support for the libc resolver: that is all in
* resolve.c.
**/
#define ADDRESS_PRIVATE
@ -37,7 +40,6 @@
#include "lib/net/address.h"
#include "lib/net/socket.h"
#include "lib/net/resolve.h"
#include "lib/container/smartlist.h"
#include "lib/ctime/di_ops.h"
#include "lib/log/torlog.h"
@ -1748,7 +1750,7 @@ tor_addr_port_split(int severity, const char *addrport,
tor_assert(addrport);
tor_assert(address_out);
tor_assert(port_out);
/* We need to check for IPv6 manually because addr_port_lookup() doesn't
/* We need to check for IPv6 manually because the logic below doesn't
* do a good job on IPv6 addresses that lack a port. */
if (tor_addr_parse(&a_tmp, addrport) == AF_INET6) {
*port_out = 0;
@ -1756,30 +1758,11 @@ tor_addr_port_split(int severity, const char *addrport,
return 0;
}
return addr_port_lookup(severity, addrport, address_out, NULL, port_out);
}
/** Parse a string of the form "host[:port]" from <b>addrport</b>. If
* <b>address</b> is provided, set *<b>address</b> to a copy of the
* host portion of the string. If <b>addr</b> is provided, try to
* resolve the host portion of the string and store it into
* *<b>addr</b> (in host byte order). If <b>port_out</b> is provided,
* store the port number into *<b>port_out</b>, or 0 if no port is given.
* If <b>port_out</b> is NULL, then there must be no port number in
* <b>addrport</b>.
* Return 0 on success, -1 on failure.
*/
int
addr_port_lookup(int severity, const char *addrport, char **address,
uint32_t *addr, uint16_t *port_out)
{
const char *colon;
char *address_ = NULL;
int port_;
int ok = 1;
tor_assert(addrport);
colon = strrchr(addrport, ':');
if (colon) {
address_ = tor_strndup(addrport, colon-addrport);
@ -1801,22 +1784,13 @@ addr_port_lookup(int severity, const char *addrport, char **address,
port_ = 0;
}
if (addr) {
/* There's an addr pointer, so we need to resolve the hostname. */
if (tor_lookup_hostname(address_,addr)) {
log_fn(severity, LD_NET, "Couldn't look up %s", escaped(address_));
ok = 0;
*addr = 0;
}
}
if (address && ok) {
*address = address_;
if (ok) {
*address_out = address_;
} else {
if (address)
*address = NULL;
*address_out = NULL;
tor_free(address_);
}
if (port_out)
*port_out = ok ? ((uint16_t) port_) : 0;