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refactor: Moving write_ip and read_ip into routing.h 

Further reduction in things in p2p_message so we can deprecate it
later.
ppa-0.6.1
Christian Decker 8 years ago
committed by Rusty Russell
parent
2a7e757053
commit
3aa45a6d0b
3 changed files with 107 additions and 103 deletions
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  1. 103
      daemon/p2p_announce.c
  2. 104
      daemon/routing.c
  3. 3
      daemon/routing.h

103
daemon/p2p_announce.c
View File

@ -8,8 +8,6 @@
#include "daemon/timeout.h"
#include "utils.h"
#include <arpa/inet.h>
#include <ccan/endian/endian.h>
#include <ccan/tal/str/str.h>
#include <ccan/tal/tal.h>
#include <secp256k1.h>
@ -30,107 +28,6 @@ struct queued_message {
struct list_node list;
};
/* BOLT #7:
*
* The following `address descriptor` types are defined:
*
* 1. `0`: padding. data = none (length 0).
* 1. `1`: IPv4. data = `[4:ipv4-addr][2:port]` (length 6)
* 2. `2`: IPv6. data = `[16:ipv6-addr][2:port]` (length 18)
*/
/* FIXME: Don't just take first one, depends whether we have IPv6 ourselves */
/* Returns false iff it was malformed */
static bool read_ip(const tal_t *ctx, const u8 *addresses, char **hostname,
int *port)
{
size_t len = tal_count(addresses);
const u8 *p = addresses;
char tempaddr[INET6_ADDRSTRLEN];
be16 portnum;
*hostname = NULL;
while (len) {
u8 type = *p;
p++;
len--;
switch (type) {
case 0:
break;
case 1:
/* BOLT #7:
*
* The receiving node SHOULD fail the connection if
* `addrlen` is insufficient to hold the address
* descriptors of the known types.
*/
if (len < 6)
return false;
inet_ntop(AF_INET, p, tempaddr, sizeof(tempaddr));
memcpy(&portnum, p + 4, sizeof(portnum));
*hostname = tal_strdup(ctx, tempaddr);
return true;
case 2:
if (len < 18)
return false;
inet_ntop(AF_INET6, p, tempaddr, sizeof(tempaddr));
memcpy(&portnum, p + 16, sizeof(portnum));
*hostname = tal_strdup(ctx, tempaddr);
return true;
default:
/* BOLT #7:
*
* The receiving node SHOULD ignore the first `address
* descriptor` which does not match the types defined
* above.
*/
return true;
}
}
/* Not a fatal error. */
return true;
}
/* BOLT #7:
*
* The creating node SHOULD fill `addresses` with an address descriptor for
* each public network address which expects incoming connections, and MUST
* set `addrlen` to the number of bytes in `addresses`. Non-zero typed
* address descriptors MUST be placed in ascending order; any number of
* zero-typed address descriptors MAY be placed anywhere, but SHOULD only be
* used for aligning fields following `addresses`.
*
* The creating node MUST NOT create a type 1 or type 2 address descriptor
* with `port` equal to zero, and SHOULD ensure `ipv4-addr` and `ipv6-addr`
* are routable addresses. The creating node MUST NOT include more than one
* `address descriptor` of the same type.
*/
/* FIXME: handle case where we have both ipv6 and ipv4 addresses! */
static u8 *write_ip(const tal_t *ctx, const char *srcip, int port)
{
u8 *address;
be16 portnum = cpu_to_be16(port);
if (!port)
return tal_arr(ctx, u8, 0);
if (!strchr(srcip, ':')) {
address = tal_arr(ctx, u8, 7);
address[0] = 1;
inet_pton(AF_INET, srcip, address+1);
memcpy(address + 5, &portnum, sizeof(portnum));
return address;
} else {
address = tal_arr(ctx, u8, 18);
address[0] = 2;
inet_pton(AF_INET6, srcip, address+1);
memcpy(address + 17, &portnum, sizeof(portnum));
return address;
}
}
static void broadcast(struct lightningd_state *dstate,
int type, u8 *pkt,
struct peer *origin)

104
daemon/routing.c
View File

@ -5,9 +5,12 @@
#include "packets.h"
#include "pseudorand.h"
#include "routing.h"
#include <arpa/inet.h>
#include <ccan/array_size/array_size.h>
#include <ccan/crypto/siphash24/siphash24.h>
#include <ccan/endian/endian.h>
#include <ccan/structeq/structeq.h>
#include <ccan/tal/str/str.h>
#include <inttypes.h>
/* 365.25 * 24 * 60 / 10 */
@ -696,3 +699,104 @@ bool add_channel_direction(struct routing_state *rstate,
tal_count(announcement), 0);
return true;
}
/* BOLT #7:
*
* The following `address descriptor` types are defined:
*
* 1. `0`: padding. data = none (length 0).
* 1. `1`: IPv4. data = `[4:ipv4-addr][2:port]` (length 6)
* 2. `2`: IPv6. data = `[16:ipv6-addr][2:port]` (length 18)
*/
/* FIXME: Don't just take first one, depends whether we have IPv6 ourselves */
/* Returns false iff it was malformed */
bool read_ip(const tal_t *ctx, const u8 *addresses, char **hostname,
int *port)
{
size_t len = tal_count(addresses);
const u8 *p = addresses;
char tempaddr[INET6_ADDRSTRLEN];
be16 portnum;
*hostname = NULL;
while (len) {
u8 type = *p;
p++;
len--;
switch (type) {
case 0:
break;
case 1:
/* BOLT #7:
*
* The receiving node SHOULD fail the connection if
* `addrlen` is insufficient to hold the address
* descriptors of the known types.
*/
if (len < 6)
return false;
inet_ntop(AF_INET, p, tempaddr, sizeof(tempaddr));
memcpy(&portnum, p + 4, sizeof(portnum));
*hostname = tal_strdup(ctx, tempaddr);
return true;
case 2:
if (len < 18)
return false;
inet_ntop(AF_INET6, p, tempaddr, sizeof(tempaddr));
memcpy(&portnum, p + 16, sizeof(portnum));
*hostname = tal_strdup(ctx, tempaddr);
return true;
default:
/* BOLT #7:
*
* The receiving node SHOULD ignore the first `address
* descriptor` which does not match the types defined
* above.
*/
return true;
}
}
/* Not a fatal error. */
return true;
}
/* BOLT #7:
*
* The creating node SHOULD fill `addresses` with an address descriptor for
* each public network address which expects incoming connections, and MUST
* set `addrlen` to the number of bytes in `addresses`. Non-zero typed
* address descriptors MUST be placed in ascending order; any number of
* zero-typed address descriptors MAY be placed anywhere, but SHOULD only be
* used for aligning fields following `addresses`.
*
* The creating node MUST NOT create a type 1 or type 2 address descriptor
* with `port` equal to zero, and SHOULD ensure `ipv4-addr` and `ipv6-addr`
* are routable addresses. The creating node MUST NOT include more than one
* `address descriptor` of the same type.
*/
/* FIXME: handle case where we have both ipv6 and ipv4 addresses! */
u8 *write_ip(const tal_t *ctx, const char *srcip, int port)
{
u8 *address;
be16 portnum = cpu_to_be16(port);
if (!port)
return tal_arr(ctx, u8, 0);
if (!strchr(srcip, ':')) {
address = tal_arr(ctx, u8, 7);
address[0] = 1;
inet_pton(AF_INET, srcip, address+1);
memcpy(address + 5, &portnum, sizeof(portnum));
return address;
} else {
address = tal_arr(ctx, u8, 18);
address[0] = 2;
inet_pton(AF_INET6, srcip, address+1);
memcpy(address + 17, &portnum, sizeof(portnum));
return address;
}
}

3
daemon/routing.h
View File

@ -156,4 +156,7 @@ bool add_channel_direction(struct routing_state *rstate,
const struct channel_id *channel_id,
const u8 *announcement);
bool read_ip(const tal_t *ctx, const u8 *addresses, char **hostname, int *port);
u8 *write_ip(const tal_t *ctx, const char *srcip, int port);
#endif /* LIGHTNING_DAEMON_ROUTING_H */

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