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SOCKS: simplify code

This commit is contained in:
Přemysl Eric Janouch 2015-07-21 23:12:58 +02:00
parent 13872a3a3e
commit e4af470639
1 changed files with 22 additions and 39 deletions
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61
common.c
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@ -436,11 +436,16 @@ struct socks_connector
return false; \
BLOCK_END
#define SOCKS_NEED_DATA(n) \
#define SOCKS_READ_START(n) \
if (!socks_try_fill_read_buffer (self, (n))) \
return false; \
if (self->read_buffer.len < n) \
return true
return true; \
struct msg_unpacker unpacker; \
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len)
#define SOCKS_READ_END \
str_remove_slice (&self->read_buffer, 0, unpacker.offset)
static bool
socks_try_fill_read_buffer (struct socks_connector *self, size_t n)
@ -496,15 +501,11 @@ socks_try_flush_write_buffer (struct socks_connector *self)
static bool
socks_4a_finish (struct socks_connector *self)
{
SOCKS_NEED_DATA (8);
struct msg_unpacker unpacker;
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
SOCKS_READ_START (8);
uint8_t null, status;
hard_assert (msg_unpacker_u8 (&unpacker, &null));
hard_assert (msg_unpacker_u8 (&unpacker, &status));
str_remove_slice (&self->read_buffer, 0, unpacker.offset);
SOCKS_READ_END;
if (null != 0)
SOCKS_FAIL ("protocol error");
@ -578,12 +579,9 @@ socks_4a_start (struct socks_connector *self)
static bool
socks_5_request_port (struct socks_connector *self)
{
SOCKS_NEED_DATA (2);
struct msg_unpacker unpacker;
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
SOCKS_READ_START (2);
hard_assert (msg_unpacker_u16 (&unpacker, &self->bound_port));
str_remove_slice (&self->read_buffer, 0, unpacker.offset);
SOCKS_READ_END;
self->done = true;
return false;
@ -593,7 +591,7 @@ static bool
socks_5_request_ipv4 (struct socks_connector *self)
{
size_t len = sizeof self->bound_address.data.ipv4;
SOCKS_NEED_DATA (len);
SOCKS_READ_START (len);
memcpy (self->bound_address.data.ipv4, self->read_buffer.str, len);
str_remove_slice (&self->read_buffer, 0, len);
@ -605,7 +603,7 @@ static bool
socks_5_request_ipv6 (struct socks_connector *self)
{
size_t len = sizeof self->bound_address.data.ipv6;
SOCKS_NEED_DATA (len);
SOCKS_READ_START (len);
memcpy (self->bound_address.data.ipv6, self->read_buffer.str, len);
str_remove_slice (&self->read_buffer, 0, len);
@ -617,7 +615,7 @@ static bool
socks_5_request_domain_data (struct socks_connector *self)
{
size_t len = self->bound_address_len;
SOCKS_NEED_DATA (len);
SOCKS_READ_START (len);
self->bound_address.data.domain = xstrndup (self->read_buffer.str, len);
str_remove_slice (&self->read_buffer, 0, len);
@ -628,12 +626,9 @@ socks_5_request_domain_data (struct socks_connector *self)
static bool
socks_5_request_domain (struct socks_connector *self)
{
SOCKS_NEED_DATA (1);
struct msg_unpacker unpacker;
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
SOCKS_READ_START (1);
hard_assert (msg_unpacker_u8 (&unpacker, &self->bound_address_len));
str_remove_slice (&self->read_buffer, 0, unpacker.offset);
SOCKS_READ_END;
self->on_data = socks_5_request_domain_data;
return true;
@ -642,17 +637,13 @@ socks_5_request_domain (struct socks_connector *self)
static bool
socks_5_request_finish (struct socks_connector *self)
{
SOCKS_NEED_DATA (4);
struct msg_unpacker unpacker;
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
SOCKS_READ_START (4);
uint8_t version, status, reserved, type;
hard_assert (msg_unpacker_u8 (&unpacker, &version));
hard_assert (msg_unpacker_u8 (&unpacker, &status));
hard_assert (msg_unpacker_u8 (&unpacker, &reserved));
hard_assert (msg_unpacker_u8 (&unpacker, &type));
str_remove_slice (&self->read_buffer, 0, unpacker.offset);
SOCKS_READ_END;
if (version != 0x05)
SOCKS_FAIL ("protocol error");
@ -722,15 +713,11 @@ socks_5_request_start (struct socks_connector *self)
static bool
socks_5_userpass_finish (struct socks_connector *self)
{
SOCKS_NEED_DATA (2);
struct msg_unpacker unpacker;
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
SOCKS_READ_START (2);
uint8_t version, status;
hard_assert (msg_unpacker_u8 (&unpacker, &version));
hard_assert (msg_unpacker_u8 (&unpacker, &status));
str_remove_slice (&self->read_buffer, 0, unpacker.offset);
SOCKS_READ_END;
if (version != 0x01)
SOCKS_FAIL ("protocol error");
@ -764,15 +751,11 @@ socks_5_userpass_start (struct socks_connector *self)
static bool
socks_5_auth_finish (struct socks_connector *self)
{
SOCKS_NEED_DATA (2);
struct msg_unpacker unpacker;
msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
SOCKS_READ_START (2);
uint8_t version, method;
hard_assert (msg_unpacker_u8 (&unpacker, &version));
hard_assert (msg_unpacker_u8 (&unpacker, &method));
str_remove_slice (&self->read_buffer, 0, unpacker.offset);
SOCKS_READ_END;
if (version != 0x05)
SOCKS_FAIL ("protocol error");