#include <stdio.h>
#include <string.h>
#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/time.h>
#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define MAX_PEER_ADDRS 5
+/* send at most this many copies; honour at most that many addresses */
+
+struct comm_if;
+struct comm_addr;
typedef char *string_t;
typedef const char *cstring_t;
-typedef enum {False,True} bool_t;
+
+#define False (_Bool)0
+#define True (_Bool)1
+typedef _Bool bool_t;
+
+union iaddr {
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+};
#define ASSERT(x) do { if (!(x)) { fatal("assertion failed line %d file " \
__FILE__,__LINE__); } } while(0)
extern void *safe_malloc(size_t size, const char *message);
extern void *safe_malloc_ary(size_t size, size_t count, const char *message);
+void setcloexec(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, ...);
extern uint64_t now_global;
/* Answers to queries are delivered to a function of this
type. 'address' will be NULL if there was a problem with the query. It
- will be freed once resolve_answer_fn returns. It is in network byte
- order. */
-/* XXX extend to be able to provide multiple answers */
-typedef void resolve_answer_fn(void *st, struct in_addr *addr);
+ will be freed once resolve_answer_fn returns. naddrs is the actual
+ size of the array at addrs; was_naddrs is the number of addresses
+ 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);
typedef bool_t resolve_request_fn(void *st, cstring_t name,
+ int remoteport, struct comm_if *comm,
resolve_answer_fn *cb, void *cst);
struct resolver_if {
void *st;
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;
+ union iaddr ia;
};
/* Return True if the packet was processed, and shouldn't be passed to
comm_notify_fn *fn);
typedef bool_t comm_sendmsg_fn(void *commst, struct buffer_if *buf,
const struct comm_addr *dest);
+ /* Only returns false if (we know that) the local network
+ * environment is such that this address cannot work; transient
+ * or unknown/unexpected failures return true. */
typedef const char *comm_addr_to_string_fn(void *commst,
const struct comm_addr *ca);
/* Returned string is in a static buffer. */
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
+
typedef void log_msg_fn(void *st, int class, const char *message, ...);
typedef void log_vmsg_fn(void *st, int class, const char *message,
va_list args);
struct log_if {
void *st;
- log_msg_fn *logfn; /* Do not call these directly - you don't get */
log_vmsg_fn *vlogfn; /* printf format checking. Use [v]slilog instead */
+ char buff[LOG_MESSAGE_BUFLEN+1];
};
/* (convenience functions, defined in util.c) */
extern void slilog(struct log_if *lf, int class, const char *message, ...)
extern void vslilog(struct log_if *lf, int class, const char *message, va_list)
FORMAT(printf,3,0);
+/* Versions which take (parts of) (multiple) messages, using \n to
+ * distinguish one message from another. */
+extern void slilog_part(struct log_if *lf, int class, const char *message, ...)
+FORMAT(printf,3,4);
+extern void vslilog_part(struct log_if *lf, int class, const char *message,
+ va_list) FORMAT(printf,3,0);
+
/* SITE interface */
/* Pretty much a placeholder; allows starting and stopping of processing,
#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);
+ void *dst, uint32_t *localmtu_r /* NULL ok */);
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);
uint8_t *base;
uint8_t *start;
int32_t size; /* Size of buffer contents */
- int32_t len; /* Total length allocated at base */
+ int32_t alloclen; /* Total length allocated at base */
};
/***** LOG functions *****/
#define FILLZERO(obj) (memset(&(obj),0,sizeof((obj))))
+/*
+ * void COPY_OBJ( OBJECT& dst, const OBJECT& src);
+ * void COPY_ARRAY(OBJECT *dst, const OBJECT *src, INTEGER count);
+ * // Typesafe: we check that the type OBJECT is the same in both cases.
+ * // It is OK to use COPY_OBJ on an array object, provided it's
+ * // _actually_ the whole array object and not decayed into a
+ * // pointer (e.g. a formal parameter).
+ */
+#define COPY_OBJ(dst,src) \
+ (&(dst)==&(src), memcpy(&(dst),&(src),sizeof((dst))))
+#define COPY_ARRAY(dst,src,count) \
+ (&(dst)[0]==&(src)[0], memcpy((dst),(src),sizeof((dst)[0])*(count)))
+
#endif /* secnet_h */
~ian / secnet.git / blobdiff