X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=secnet.git;a=blobdiff_plain;f=secnet.h;h=7cdeeda2bad90f00c0fdb56e4eef15c31460e013;hp=92740597008cca2364e56300b18b59c28633e362;hb=d3fe100dfc120244d316e083ce87b1eb130fe4fd;hpb=5963521296680c2aeb40baeb72459dffc14cd996 diff --git a/secnet.h b/secnet.h index 9274059..7cdeeda 100644 --- a/secnet.h +++ b/secnet.h @@ -6,38 +6,23 @@ #include "config.h" #include #include -#include #include +#include +#include #include - typedef char *string_t; typedef enum {False,True} bool_t; -#define ASSERT(x) do { if (!(x)) { fatal("assertion failed line " __LINE__ \ - " file " __FILE__ "\n"); } while(0) - -/***** SHARED types *****/ - -/* These are stored in HOST byte order */ -struct subnet { - uint32_t prefix; - uint32_t mask; -}; - -struct subnet_list { - uint32_t entries; - struct subnet *list; -}; - -/* Match an address (in HOST byte order) with a subnet list. - Returns True if matched. */ -extern bool_t subnet_match(struct subnet_list *list, uint32_t address); - -/***** END of shared types *****/ +#define ASSERT(x) do { if (!(x)) { fatal("assertion failed line %d file " \ + __FILE__ "\n",__LINE__); } } while(0) /***** CONFIGURATION support *****/ +extern bool_t just_check_config; /* If True then we're going to exit after + reading the configuration file */ +extern bool_t background; /* If True then we'll eventually run as a daemon */ + typedef struct dict dict_t; /* Configuration dictionary */ typedef struct closure closure_t; typedef struct item item_t; @@ -91,6 +76,7 @@ extern string_t *dict_keys(dict_t *dict); /* List-manipulation functions */ extern list_t *list_new(void); +extern uint32_t list_length(list_t *a); extern list_t *list_append(list_t *a, item_t *i); extern list_t *list_append_list(list_t *a, list_t *b); /* Returns an item from the list (index starts at 0), or NULL */ @@ -110,21 +96,28 @@ extern uint32_t dict_read_number(dict_t *dict, string_t key, bool_t required, string_t desc, struct cloc loc, uint32_t def); extern bool_t dict_read_bool(dict_t *dict, string_t key, bool_t required, string_t desc, struct cloc loc, bool_t def); -extern void dict_read_subnet_list(dict_t *dict, string_t key, bool_t required, - string_t desc, struct cloc loc, - struct subnet_list *sl); -extern uint32_t string_to_ipaddr(item_t *i, string_t desc); +struct flagstr { + string_t name; + uint32_t value; +}; +extern uint32_t string_to_word(string_t s, struct cloc loc, + struct flagstr *f, string_t desc); +extern uint32_t string_list_to_word(list_t *l, struct flagstr *f, + string_t desc); /***** END of configuration support *****/ -/***** UTILITY functions *****/ +/***** LOG functions *****/ -#define M_WARNING 1 -#define M_ERROR 2 -#define M_FATAL 4 -#define M_INFO 8 -#define M_DEBUG_CONFIG 16 -#define M_DEBUG_PHASE 32 +#define M_DEBUG_CONFIG 0x001 +#define M_DEBUG_PHASE 0x002 +#define M_DEBUG 0x004 +#define M_INFO 0x008 +#define M_NOTICE 0x010 +#define M_WARNING 0x020 +#define M_ERR 0x040 +#define M_SECURITY 0x080 +#define M_FATAL 0x100 extern void fatal(char *message, ...); extern void fatal_perror(char *message, ...); @@ -132,13 +125,14 @@ extern void fatal_status(int status, char *message, ...); extern void fatal_perror_status(int status, char *message, ...); extern void cfgfatal(struct cloc loc, string_t facility, char *message, ...); -extern char *safe_strdup(char *string, char *message); -extern void *safe_malloc(size_t size, char *message); - extern void Message(uint32_t class, char *message, ...); -extern string_t ipaddr_to_string(uint32_t addr); -extern string_t subnet_to_string(struct subnet *sn); +/***** END of log functions *****/ + +/***** UTILITY functions *****/ + +extern char *safe_strdup(char *string, char *message); +extern void *safe_malloc(size_t size, char *message); extern int sys_cmd(const char *file, char *argc, ...); @@ -178,15 +172,27 @@ extern void register_for_poll(void *st, beforepoll_fn *before, #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_DROPPRIV 4 /* Last chance for privileged operations */ -#define PHASE_RUN 5 -#define PHASE_SHUTDOWN 6 /* About to die; delete key material, etc. */ -#define NR_PHASES 7 +#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 typedef void hook_fn(void *self, uint32_t newphase); bool_t add_hook(uint32_t phase, hook_fn *f, void *state); bool_t remove_hook(uint32_t phase, hook_fn *f, void *state); +extern uint32_t current_phase; +extern void enter_phase(uint32_t new_phase); + +extern bool_t require_root_privileges; /* Some features (like netlink + 'soft' routes) require that + secnet retain root + privileges. They should + indicate that here when + appropriate. */ +extern string_t require_root_privileges_explanation; + /***** END of program lifetime support *****/ /***** MODULE support *****/ @@ -194,26 +200,26 @@ bool_t remove_hook(uint32_t phase, hook_fn *f, void *state); /* Module initialisation function type - modules export one function of this type which is called to initialise them. For dynamically loaded modules it's called "secnet_module". */ -typedef void (init_module)(dict_t *dict); +typedef void init_module(dict_t *dict); /***** END of module support *****/ /***** CLOSURE TYPES and interface definitions *****/ -#define CL_PURE 0 -#define CL_RESOLVER 1 -#define CL_RANDOMSRC 2 -#define CL_RSAPUBKEY 3 -#define CL_RSAPRIVKEY 4 -#define CL_COMM 5 -#define CL_IPIF 6 -#define CL_LOG 7 -#define CL_SITE 8 -#define CL_TRANSFORM 9 -#define CL_NETLINK 10 -#define CL_DH 11 -#define CL_HASH 12 -#define CL_BUFFER 13 +#define CL_PURE 0 +#define CL_RESOLVER 1 +#define CL_RANDOMSRC 2 +#define CL_RSAPUBKEY 3 +#define CL_RSAPRIVKEY 4 +#define CL_COMM 5 +#define CL_IPIF 6 +#define CL_LOG 7 +#define CL_SITE 8 +#define CL_TRANSFORM 9 +#define CL_DH 11 +#define CL_HASH 12 +#define CL_BUFFER 13 +#define CL_NETLINK 14 struct buffer_if; @@ -282,15 +288,15 @@ struct comm_if { /* LOG interface */ -typedef void log_msg_fn(void *st, int priority, char *message, ...); -typedef void log_vmsg_fn(void *st, int priority, char *message, va_list args); +typedef void log_msg_fn(void *st, int class, char *message, ...); +typedef void log_vmsg_fn(void *st, int class, char *message, va_list args); struct log_if { void *st; log_msg_fn *log; log_vmsg_fn *vlog; }; /* (convenience function, defined in util.c) */ -extern void log(struct log_if *lf, int priority, char *message, ...); +extern void log(struct log_if *lf, int class, char *message, ...); /* SITE interface */ @@ -343,24 +349,34 @@ struct transform_if { /* NETLINK interface */ -/* Used by netlink to deliver to site, and by site to deliver to netlink. - cid is the client identifier returned by netlink_regnets_fn */ -typedef void netlink_deliver_fn(void *st, void *cid, struct buffer_if *buf); +/* Used by netlink to deliver to site, and by site to deliver to + netlink. cid is the client identifier returned by + netlink_regnets_fn. If buf has size 0 then the function is just + being called for its site-effects (eg. making the site code attempt + to bring up a network link) */ +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 */ -typedef void netlink_can_deliver_fn(void *st, void *cid, bool_t can_deliver); -/* Register for packets from specified networks. Return value is client - identifier. */ -typedef void *netlink_regnets_fn(void *st, struct subnet_list *networks, - netlink_deliver_fn *deliver, void *dst, - uint32_t max_start_pad, uint32_t max_end_pad, - string_t client_name); - + 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 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, uint32_t max_start_pad, + uint32_t max_end_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, uint32_t new_mtu); struct netlink_if { void *st; - netlink_regnets_fn *regnets; + netlink_register_fn *reg; netlink_deliver_fn *deliver; - netlink_can_deliver_fn *set_delivery; + netlink_link_quality_fn *set_quality; + netlink_output_config_fn *output_config; + netlink_check_config_fn *check_config; + netlink_set_mtu_fn *set_mtu; }; /* DH interface */