#ifndef secnet_h
#define secnet_h
+#define ADNS_FEATURE_MANYAF
+
#include "config.h"
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
+#include <errno.h>
#include <sys/poll.h>
#include <sys/types.h>
+#include <sys/wait.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
+#include <bsd/sys/queue.h>
+
#define MAX_PEER_ADDRS 5
/* send at most this many copies; honour at most that many addresses */
union iaddr {
struct sockaddr sa;
struct sockaddr_in sin;
+#ifdef CONFIG_IPV6
+ struct sockaddr_in6 sin6;
+#endif
};
#define ASSERT(x) do { if (!(x)) { fatal("assertion failed line %d file " \
/* from process.c */
extern void start_signal_handling(void);
+void afterfork(void);
+/* Must be called before exec in every child made after
+ start_signal_handling. Safe to call in earlier children too. */
+
/***** CONFIGURATION support *****/
extern bool_t just_check_config; /* If True then we're going to exit after
/* List-manipulation functions */
extern list_t *list_new(void);
-extern int32_t list_length(list_t *a);
+extern int32_t list_length(const 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 */
/* return value can safely be assigned to int32_t */
extern bool_t dict_read_bool(dict_t *dict, cstring_t key, bool_t required,
cstring_t desc, struct cloc loc, bool_t def);
+const char **dict_read_string_array(dict_t *dict, cstring_t key,
+ bool_t required, cstring_t desc,
+ struct cloc loc, const char *const *def);
+ /* Return value is a NULL-terminated array obtained from malloc;
+ * Individual string values are still owned by config file machinery
+ * and must not be modified or freed. Returns NULL if key not
+ * found. */
+
struct flagstr {
cstring_t name;
uint32_t value;
extern char *safe_strdup(const char *string, const char *message);
extern void *safe_malloc(size_t size, const char *message);
extern void *safe_malloc_ary(size_t size, size_t count, const char *message);
+extern void *safe_realloc_ary(void *p, size_t size, size_t count,
+ const char *message);
void setcloexec(int fd); /* cannot fail */
+void setnonblock(int fd); /* cannot fail */
void pipe_cloexec(int fd[2]); /* pipe(), setcloexec() twice; cannot fail */
extern int sys_cmd(const char *file, const char *argc, ...);
/* If nfds_io is insufficient for your needs, set it to the required
number and return ERANGE. timeout is in milliseconds; if it is too
- high then lower it. It starts at -1 (==infinite) */
+ high then lower it. It starts at -1 (==infinite). */
+/* Note that beforepoll_fn may NOT do anything which might change the
+ fds or timeouts wanted by other registered poll loop loopers.
+ Callers should make sure of this by not making any calls into other
+ modules from the beforepoll_fn; the easiest way to ensure this is
+ for beforepoll_fn to only retreive information and not take any
+ action.
+ */
typedef int beforepoll_fn(void *st, struct pollfd *fds, int *nfds_io,
int *timeout_io);
typedef void afterpoll_fn(void *st, struct pollfd *fds, int nfds);
+ /* If beforepoll_fn returned ERANGE, afterpoll_fn gets nfds==0.
+ afterpoll_fn never gets !!(fds[].revents & POLLNVAL) - such
+ a report is detected as a fatal error by the event loop. */
+
+/* void BEFOREPOLL_WANT_FDS(int want);
+ * Expects: int *nfds_io;
+ * Can perform non-local exit.
+ * Checks whether there is space for want fds. If so, sets *nfds_io.
+ * If not, sets *nfds_io and returns. */
+#define BEFOREPOLL_WANT_FDS(want) do{ \
+ if (*nfds_io<(want)) { *nfds_io=(want); return ERANGE; } \
+ *nfds_io=(want); \
+ }while(0)
/* Register interest in the main loop of the program. Before a call
to poll() your supplied beforepoll function will be called. After
- the call to poll() the supplied afterpoll function will be called.
- max_nfds is a _hint_ about the maximum number of struct pollfd
- structures you may require - you can always ask for more in
- *nfds_io. */
-extern void register_for_poll(void *st, beforepoll_fn *before,
- afterpoll_fn *after, int32_t max_nfds,
- cstring_t desc);
+ the call to poll() the supplied afterpoll function will be called. */
+struct poll_interest *register_for_poll(void *st, beforepoll_fn *before,
+ afterpoll_fn *after, cstring_t desc);
+void deregister_for_poll(struct poll_interest *i);
/***** END of scheduling support */
actually found in the DNS, which may be bigger if addrs is equal
to MAX_PEER_ADDRS (ie there were too many). */
typedef void resolve_answer_fn(void *st, const struct comm_addr *addrs,
- int naddrs, int was_naddrs);
+ int naddrs, int was_naddrs,
+ const char *name, const char *failwhy);
+ /* name is the same ptr as passed to request, so its lifetime must
+ * be suitable*/
typedef bool_t resolve_request_fn(void *st, cstring_t name,
int remoteport, struct comm_if *comm,
resolve_answer_fn *cb, void *cst);
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;
union iaddr ia;
+ int ix; /* see comment `Re comm_addr.ix' in udp.c */
};
/* Return True if the packet was processed, and shouldn't be passed to
- any other potential receivers. */
+ any other potential receivers. (buf is freed iff True returned.) */
typedef bool_t comm_notify_fn(void *state, struct buffer_if *buf,
const struct comm_addr *source);
typedef void comm_request_notify_fn(void *commst, void *nst,
comm_addr_to_string_fn *addr_to_string;
};
+bool_t iaddr_equal(const union iaddr *ia, const union iaddr *ib);
+
static inline const char *comm_addr_to_string(const struct comm_addr *ca)
{
return ca->comm->addr_to_string(ca->comm->st, ca);
}
+static inline bool_t comm_addr_equal(const struct comm_addr *a,
+ const struct comm_addr *b)
+{
+ return a->comm==b->comm && iaddr_equal(&a->ia,&b->ia);
+}
+
/* LOG interface */
#define LOG_MESSAGE_BUFLEN 1023
extern NORETURN(fatal_perror_status(int status, const char *message, ...))
FORMAT(printf,2,3);
+/* Convenient nonfatal logging. Requires message that does not end in '\n'.
+ * If class contains M_FATAL, exits (after entering PHASE_SHUTDOWN).
+ * lg, errnoval and loc may sensibly be 0. desc must NOT be 0.
+ * lg_[v]perror save and restore errno. */
+void lg_vperror(struct log_if *lg, const char *desc, struct cloc *loc,
+ int class, int errnoval, const char *fmt, va_list al)
+ FORMAT(printf,6,0);
+void lg_perror(struct log_if *lg, const char *desc, struct cloc *loc,
+ int class, int errnoval, const char *fmt, ...)
+ FORMAT(printf,6,7);
+void lg_exitstatus(struct log_if *lg, const char *desc, struct cloc *loc,
+ int class, int status, const char *progname);
+
/* The cfgfatal() family of functions require messages that end in '\n' */
extern NORETURN(cfgfatal(struct cloc loc, cstring_t facility,
const char *message, ...)) FORMAT(printf,3,4);
#define STRING(x) STRING2(x)
#define FILLZERO(obj) (memset(&(obj),0,sizeof((obj))))
+#define ARRAY_SIZE(ary) (sizeof((ary))/sizeof((ary)[0]))
/*
* void COPY_OBJ( OBJECT& dst, const OBJECT& src);
~ianmdlvl / secnet.git / blobdiff