#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
+#include <string.h>
+#include <assert.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/time.h>
#include <netinet/in.h>
-/*
- * Macros added by SGT for endianness-independence
- */
-#define GET_32BIT_MSB_FIRST(cp) \
- (((unsigned long)(unsigned char)(cp)[0] << 24) | \
- ((unsigned long)(unsigned char)(cp)[1] << 16) | \
- ((unsigned long)(unsigned char)(cp)[2] << 8) | \
- ((unsigned long)(unsigned char)(cp)[3]))
-
-#define PUT_32BIT_MSB_FIRST(cp, value) ( \
- (cp)[0] = (char)((value) >> 24), \
- (cp)[1] = (char)((value) >> 16), \
- (cp)[2] = (char)((value) >> 8), \
- (cp)[3] = (char)(value) )
-
typedef char *string_t;
typedef const char *cstring_t;
typedef enum {False,True} bool_t;
/* 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);
extern init_module udp_module;
extern init_module util_module;
extern init_module site_module;
-extern init_module transform_module;
+extern init_module transform_eax_module;
+extern init_module transform_cbcmac_module;
extern init_module netlink_module;
extern init_module rsa_module;
extern init_module dh_module;
/* 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;
- int32_t min_end_pad;
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 */
/* TRANSFORM interface */
/* A reversable transformation. Transforms buffer in-place; may add
- data to start or end. Maximum amount of data to be added specified
- in max_start_pad and max_end_pad. (Reverse transformations decrease
+ data to start or end. Maximum amount of data to be added before
+ the packet specified in max_start_pad. (Reverse transformations decrease
length, of course.) Transformations may be key-dependent, in which
case key material is passed in at initialisation time. They may
also depend on internal factors (eg. time) and keep internal
state. A struct transform_if only represents a particular type of
transformation; instances of the transformation (eg. with
- particular key material) have a different C type. */
+ particular key material) have a different C type. The same
+ secret key will be used in opposite directions between a pair of
+ secnets; one of these pairs will get direction==False, the other True. */
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_setkey_fn(void *st, uint8_t *key, int32_t keylen,
+ bool_t direction);
+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;
transform_destroyinstance_fn *destroy;
+ int32_t max_start_pad; /* same as from transform_if */
};
struct transform_if {
void *st;
- int32_t max_start_pad; /* these three are all <<< INT_MAX */
- int32_t max_end_pad;
- int32_t keylen;
+ int32_t max_start_pad; /* these two are both <<< INT_MAX */
+ int32_t keylen; /* 0 means give the transform exactly as much as there is */
+ int capab_transformnum;
transform_createinstance_fn *create;
};
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,
- void *dst, int32_t max_start_pad,
- int32_t max_end_pad);
+ void *dst, int32_t max_start_pad);
typedef void netlink_output_config_fn(void *st, struct buffer_if *buf);
typedef bool_t netlink_check_config_fn(void *st, struct buffer_if *buf);
typedef void netlink_set_mtu_fn(void *st, int32_t new_mtu);
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;
};
struct dh_if {
void *st;
int32_t len; /* Approximate size of modulus in bytes */
+ int32_t ceil_len; /* Number of bytes just sufficient to contain modulus */
dh_makepublic_fn *makepublic;
dh_makeshared_fn *makeshared;
};
~ian / secnet.git / blobdiff