tun: add hard routes even if they are currently down.

[secnet.git] / secnet.h

diff --git a/secnet.h b/secnet.h
index 49afd322e83130506da37f96e3036e7ea57efed0..6ac64e30a7b517986faeb25fda9d32bca78b196c 100644 (file)
--- a/secnet.h
+++ b/secnet.h
@@ -184,17 +184,24 @@ extern void register_for_poll(void *st, beforepoll_fn *before,
 
 /* The secnet program goes through a number of phases in its lifetime.
    Module code may arrange to be called just as various phases are
-   entered. */
-
-#define PHASE_INIT          0
-#define PHASE_GETOPTS       1  /* Process command-line arguments */
-#define PHASE_READCONFIG    2  /* Parse and process configuration file */
-#define PHASE_SETUP         3  /* Process information in configuration */
-#define PHASE_GETRESOURCES  4  /* Obtain all external resources */
-#define PHASE_DROPPRIV      5  /* Last chance for privileged operations */
-#define PHASE_RUN           6
-#define PHASE_SHUTDOWN      7  /* About to die; delete key material, etc. */
-#define NR_PHASES           8
+   entered.
+ 
+   Remember to update the table in util.c if changing the set of
+   phases. */
+
+enum phase {
+    PHASE_INIT,
+    PHASE_GETOPTS,             /* Process command-line arguments */
+    PHASE_READCONFIG,          /* Parse and process configuration file */
+    PHASE_SETUP,               /* Process information in configuration */
+    PHASE_DAEMONIZE,           /* Become a daemon (if necessary) */
+    PHASE_GETRESOURCES,        /* Obtain all external resources */
+    PHASE_DROPPRIV,            /* Last chance for privileged operations */
+    PHASE_RUN,
+    PHASE_SHUTDOWN,            /* About to die; delete key material, etc. */
+    /* Keep this last: */
+    NR_PHASES,
+};
 
 typedef void hook_fn(void *self, uint32_t newphase);
 bool_t add_hook(uint32_t phase, hook_fn *f, void *state);
@@ -303,16 +310,31 @@ struct rsaprivkey_if {
 
 /* COMM interface */
 
+struct comm_addr {
+    /* This struct is pure data; in particular comm's clients may
+       freely copy it. */
+    /* Everyone is also guaranteed that all padding is set to zero, ie
+       that comm_addrs referring to semantically identical peers will
+       compare equal with memcmp.  Anyone who constructs a comm_addr
+       must start by memsetting it with FILLZERO, or some
+       equivalent. */
+    struct comm_if *comm;
+    struct sockaddr_in sin;
+};
+
 /* Return True if the packet was processed, and shouldn't be passed to
    any other potential receivers. */
 typedef bool_t comm_notify_fn(void *state, struct buffer_if *buf,
-                           struct sockaddr_in *source);
+                             const struct comm_addr *source);
 typedef void comm_request_notify_fn(void *commst, void *nst,
                                    comm_notify_fn *fn);
 typedef void comm_release_notify_fn(void *commst, void *nst,
                                    comm_notify_fn *fn);
 typedef bool_t comm_sendmsg_fn(void *commst, struct buffer_if *buf,
-                              struct sockaddr_in *dest);
+                              const struct comm_addr *dest);
+typedef const char *comm_addr_to_string_fn(void *commst,
+                                          const struct comm_addr *ca);
+        /* Returned string is in a static buffer. */
 struct comm_if {
     void *st;
     int32_t min_start_pad;
@@ -320,6 +342,7 @@ struct comm_if {
     comm_request_notify_fn *request_notify;
     comm_release_notify_fn *release_notify;
     comm_sendmsg_fn *sendmsg;
+    comm_addr_to_string_fn *addr_to_string;
 };
 
 /* LOG interface */
@@ -364,15 +387,21 @@ struct site_if {
 
 typedef struct transform_inst_if *transform_createinstance_fn(void *st);
 typedef bool_t transform_setkey_fn(void *st, uint8_t *key, int32_t keylen);
+typedef bool_t transform_valid_fn(void *st); /* 0: no key; 1: ok */
 typedef void transform_delkey_fn(void *st);
 typedef void transform_destroyinstance_fn(void *st);
-/* Returns 0 for 'all is well', any other value for a problem */
+/* Returns:
+ *   0: all is well
+ *   1: for any other problem
+ *   2: message decrypted but sequence number was out of range
+ */
 typedef uint32_t transform_apply_fn(void *st, struct buffer_if *buf,
                                    const char **errmsg);
 
 struct transform_inst_if {
     void *st;
     transform_setkey_fn *setkey;
+    transform_valid_fn *valid;
     transform_delkey_fn *delkey;
     transform_apply_fn *forwards;
     transform_apply_fn *reverse;
@@ -397,10 +426,11 @@ struct transform_if {
 typedef void netlink_deliver_fn(void *st, struct buffer_if *buf);
 /* site code can tell netlink when outgoing packets will be dropped,
    so netlink can generate appropriate ICMP and make routing decisions */
-#define LINK_QUALITY_DOWN 0   /* No chance of a packet being delivered */
-#define LINK_QUALITY_DOWN_STALE_ADDRESS 1 /* Link down, old address information */
-#define LINK_QUALITY_DOWN_CURRENT_ADDRESS 2 /* Link down, current address information */
-#define LINK_QUALITY_UP 3     /* Link active */
+#define LINK_QUALITY_UNUSED 0   /* This link is unused, do not make this netlink */
+#define LINK_QUALITY_DOWN 1   /* No chance of a packet being delivered right away*/
+#define LINK_QUALITY_DOWN_STALE_ADDRESS 2 /* Link down, old address information */
+#define LINK_QUALITY_DOWN_CURRENT_ADDRESS 3 /* Link down, current address information */
+#define LINK_QUALITY_UP 4     /* Link active */
 #define MAXIMUM_LINK_QUALITY 3
 typedef void netlink_link_quality_fn(void *st, uint32_t quality);
 typedef void netlink_register_fn(void *st, netlink_deliver_fn *deliver,
@@ -414,8 +444,6 @@ struct netlink_if {
     netlink_register_fn *reg;
     netlink_deliver_fn *deliver;
     netlink_link_quality_fn *set_quality;
-    netlink_output_config_fn *output_config;
-    netlink_check_config_fn *check_config;
     netlink_set_mtu_fn *set_mtu;
 };