#include <mLib/alloc.h>
#include <mLib/arena.h>
+#include <mLib/base64.h>
#include <mLib/bres.h>
#include <mLib/dstr.h>
#include <mLib/env.h>
#include <mLib/str.h>
#include <mLib/sub.h>
#include <mLib/trace.h>
+#include <mLib/tv.h>
#include <catacomb/buf.h>
#define T_KEYSET 32u
#define T_KEYEXCH 64u
#define T_KEYMGMT 128u
+#define T_CHAL 256u
-#define T_ALL 255u
+#define T_ALL 511u
/* --- Units --- */
struct sockaddr_in sin;
} addr;
+/* --- Sequence number checking --- */
+
+typedef struct seqwin {
+ uint32 seq; /* First acceptable input sequence */
+ uint32 win; /* Window of acceptable numbers */
+} seqwin;
+
+#define SEQ_WINSZ 32 /* Bits in sequence number window */
+
/* --- A symmetric keyset --- *
*
* A keyset contains a set of symmetric keys for encrypting and decrypting
size_t tagsz; /* Length to truncate MAC tags */
gmac *min, *mout; /* Keyset MACs for integrity */
uint32 oseq; /* Outbound sequence number */
- uint32 iseq, iwin; /* Inbound sequence number */
+ seqwin iseq; /* Inbound sequence number */
} keyset;
-#define KS_SEQWINSZ 32 /* Bits in sequence number window */
-
#define KSF_LISTEN 1u /* Don't encrypt packets yet */
#define KSF_LINK 2u /* Key is in a linked list */
* The main structure which glues everything else together.
*/
+typedef struct peerspec {
+ char *name; /* Peer's name */
+ const tunnel_ops *tops; /* Tunnel operations */
+ unsigned long t_ka; /* Keep alive interval */
+ addr sa; /* Socket address to speak to */
+ size_t sasz; /* Socket address size */
+} peerspec;
+
typedef struct peer {
struct peer *next, *prev; /* Links to next and previous */
- char *name; /* Name of this peer */
+ struct ping *pings; /* Pings we're waiting for */
+ peerspec spec; /* Specifications for this peer */
tunnel *t; /* Tunnel for local packets */
keyset *ks; /* List head for keysets */
buf b; /* Buffer for sending packets */
- addr peer; /* Peer socket address */
- size_t sasz; /* Socket address size */
stats st; /* Statistics */
keyexch kx; /* Key exchange protocol block */
+ sel_timer tka; /* Timer for keepalives */
} peer;
+typedef struct ping {
+ struct ping *next, *prev; /* Links to next and previous */
+ peer *p; /* Peer so we can free it */
+ unsigned msg; /* Kind of response expected */
+ uint32 id; /* Id so we can recognize response */
+ octet magic[32]; /* Some random data */
+ sel_timer t; /* Timeout for ping */
+ void (*func)(int /*rc*/, void */*arg*/); /* Function to call when done */
+ void *arg; /* Argument for callback */
+} ping;
+
+enum {
+ PING_NONOTIFY = -1,
+ PING_OK = 0,
+ PING_TIMEOUT,
+ PING_PEERDIED,
+ PING_MAX
+};
+
/* --- Admin structure --- */
#define OBUFSZ 16384u
char buf[OBUFSZ]; /* The actual buffer */
} obuf;
+typedef struct oqueue {
+ obuf *hd, *tl; /* Head and tail pointers */
+} oqueue;
+
+struct admin;
+
+typedef struct admin_bgop {
+ struct admin_bgop *next, *prev; /* Links to next and previous */
+ struct admin *a; /* Owner job */
+ char *tag; /* Tag string for messages */
+ void (*cancel)(struct admin_bgop *); /* Destructor function */
+} admin_bgop;
+
+typedef struct admin_resop {
+ admin_bgop bg; /* Background operation header */
+ char *addr; /* Hostname to be resolved */
+ bres_client r; /* Background resolver task */
+ sel_timer t; /* Timer for resolver */
+ addr sa; /* Socket address */
+ size_t sasz; /* Socket address size */
+ void (*func)(struct admin_resop *, int); /* Handler */
+} admin_resop;
+
+enum { ARES_OK, ARES_FAIL };
+
+typedef struct admin_addop {
+ admin_resop r; /* Name resolution header */
+ peerspec peer; /* Peer pending creation */
+} admin_addop;
+
+typedef struct admin_greetop {
+ admin_resop r; /* Name resolution header */
+ void *c; /* Challenge block */
+ size_t sz; /* Length of challenge */
+} admin_greetop;
+
+typedef struct admin_pingop {
+ admin_bgop bg; /* Background operation header */
+ ping ping; /* Ping pending response */
+ struct timeval pingtime; /* Time last ping was sent */
+} admin_pingop;
+
typedef struct admin {
struct admin *next, *prev; /* Links to next and previous */
unsigned f; /* Various useful flags */
+ unsigned ref; /* Reference counter */
#ifndef NTRACE
unsigned seq; /* Sequence number for tracing */
#endif
- char *pname; /* Peer name to create */
- char *paddr; /* Address string to resolve */
- obuf *o_head, *o_tail; /* Output buffer list */
+ oqueue out; /* Output buffer list */
+ oqueue delay; /* Delayed output buffer list */
+ admin_bgop *bg; /* Backgrounded operations */
selbuf b; /* Line buffer for commands */
sel_file w; /* Selector for write buffering */
- bres_client r; /* Background resolver task */
- sel_timer t; /* Timer for resolver */
- const tunnel_ops *tops; /* Tunnel to use */
- addr peer; /* Address to set */
- size_t sasz; /* Size of the address */
} admin;
#define AF_DEAD 1u /* Destroy this admin block */
-#define AF_LOCK 2u /* Don't destroy it yet */
+#define AF_CLOSE 2u /* Client closed connection */
#define AF_NOTE 4u /* Catch notifications */
+#define AF_WARN 8u /* Catch warning messages */
#ifndef NTRACE
- #define AF_TRACE 8u /* Catch tracing */
+ #define AF_TRACE 16u /* Catch tracing */
#endif
-#define AF_WARN 16u /* Catch warning messages */
#ifndef NTRACE
# define AF_ALLMSGS (AF_NOTE | AF_TRACE | AF_WARN)
/*----- Key management ----------------------------------------------------*/
-/* --- @km_interval@ --- *
+/* --- @km_reload@ --- *
*
* Arguments: ---
*
* Returns: Zero if OK, nonzero to force reloading of keys.
*
- * Use: Called on the interval timer to perform various useful jobs.
+ * Use: Checks the keyrings to see if they need reloading.
*/
-extern int km_interval(void);
+extern int km_reload(void);
/* --- @km_init@ --- *
*
/* --- @kx_start@ --- *
*
* Arguments: @keyexch *kx@ = pointer to key exchange context
+ * @int forcep@ = nonzero to ignore the quiet timer
*
* Returns: ---
*
* this); if no exchange is in progress, one is commenced.
*/
-extern void kx_start(keyexch */*kx*/);
+extern void kx_start(keyexch */*kx*/, int /*forcep*/);
/* --- @kx_message@ --- *
*
extern int ksl_decrypt(keyset **/*ksroot*/, unsigned /*ty*/,
buf */*b*/, buf */*bb*/);
+/*----- Challenges --------------------------------------------------------*/
+
+/* --- @c_new@ --- *
+ *
+ * Arguments: @buf *b@ = where to put the challenge
+ *
+ * Returns: Zero if OK, nonzero on error.
+ *
+ * Use: Issues a new challenge.
+ */
+
+extern int c_new(buf */*b*/);
+
+/* --- @c_check@ --- *
+ *
+ * Arguments: @buf *b@ = where to find the challenge
+ *
+ * Returns: Zero if OK, nonzero if it didn't work.
+ *
+ * Use: Checks a challenge. On failure, the buffer is broken.
+ */
+
+extern int c_check(buf */*b*/);
+
/*----- Administration interface ------------------------------------------*/
+#define A_END ((char *)0)
+
/* --- @a_warn@ --- *
*
* Arguments: @const char *fmt@ = pointer to format string
extern void p_txend(peer */*p*/);
+/* --- @p_pingsend@ --- *
+ *
+ * Arguments: @peer *p@ = destination peer
+ * @ping *pg@ = structure to fill in
+ * @unsigned type@ = message type
+ * @unsigned long timeout@ = how long to wait before giving up
+ * @void (*func)(int, void *)@ = callback function
+ * @void *arg@ = argument for callback
+ *
+ * Returns: Zero if successful, nonzero if it failed.
+ *
+ * Use: Sends a ping to a peer. Call @func@ with a nonzero argument
+ * if we get an answer within the timeout, or zero if no answer.
+ */
+
+extern int p_pingsend(peer */*p*/, ping */*pg*/, unsigned /*type*/,
+ unsigned long /*timeout*/,
+ void (*/*func*/)(int, void *), void */*arg*/);
+
+/* --- @p_pingdone@ --- *
+ *
+ * Arguments: @ping *p@ = ping structure
+ * @int rc@ = return code to pass on
+ *
+ * Returns: ---
+ *
+ * Use: Disposes of a ping structure, maybe sending a notification.
+ */
+
+extern void p_pingdone(ping */*p*/, int /*rc*/);
+
+/* --- @p_greet@ --- *
+ *
+ * Arguments: @peer *p@ = peer to send to
+ * @const void *c@ = pointer to challenge
+ * @size_t sz@ = size of challenge
+ *
+ * Returns: ---
+ *
+ * Use: Sends a greeting packet.
+ */
+
+extern void p_greet(peer */*p*/, const void */*c*/, size_t /*sz*/);
+
/* --- @p_tun@ --- *
*
* Arguments: @peer *p@ = pointer to peer block
extern void p_tun(peer */*p*/, buf */*b*/);
+/* --- @p_keyreload@ --- *
+ *
+ * Arguments: ---
+ *
+ * Returns: ---
+ *
+ * Use: Forces a check of the daemon's keyring files.
+ */
+
+extern void p_keyreload(void);
+
/* --- @p_interval@ --- *
*
* Arguments: ---
/* --- @p_create@ --- *
*
- * Arguments: @const char *name@ = name for this peer
- * @const tunnel_ops *tops@ = tunnel to use
- * @struct sockaddr *sa@ = socket address of peer
- * @size_t sz@ = size of socket address
+ * Arguments: @peerspec *spec@ = information about this peer
*
* Returns: Pointer to the peer block, or null if it failed.
*
* by this point.
*/
-extern peer *p_create(const char */*name*/, const tunnel_ops */*tops*/,
- struct sockaddr */*sa*/, size_t /*sz*/);
+extern peer *p_create(peerspec */*spec*/);
/* --- @p_name@ --- *
*
* Arguments: @peer *p@ = pointer to a peer block
*
* Returns: A pointer to the peer's name.
+ *
+ * Use: Equivalent to @p_spec(p)->name@.
*/
extern const char *p_name(peer */*p*/);
+/* --- @p_spec@ --- *
+ *
+ * Arguments: @peer *p@ = pointer to a peer block
+ *
+ * Returns: Pointer to the peer's specification
+ */
+
+extern const peerspec *p_spec(peer */*p*/);
+
/* --- @p_find@ --- *
*
* Arguments: @const char *name@ = name to look up
extern int mystrieq(const char */*x*/, const char */*y*/);
+/* --- @seq_reset@ --- *
+ *
+ * Arguments: @seqwin *s@ = sequence-checking window
+ *
+ * Returns: ---
+ *
+ * Use: Resets a sequence number window.
+ */
+
+extern void seq_reset(seqwin */*s*/);
+
+/* --- @seq_check@ --- *
+ *
+ * Arguments: @seqwin *s@ = sequence-checking window
+ * @uint32 q@ = sequence number to check
+ * @const char *service@ = service to report message from
+ *
+ * Returns: A @SEQ_@ code.
+ *
+ * Use: Checks a sequence number against the window, updating things
+ * as necessary.
+ */
+
+extern int seq_check(seqwin */*s*/, uint32 /*q*/, const char */*service*/);
+
/*----- That's all, folks -------------------------------------------------*/
#ifdef __cplusplus
~mdw / tripe / blobdiff