DNS resolver. More...

Data Structures
struct	message_header

Macros
#define	MESSAGE_HEADER_LEN 12

#define	MESSAGE_RESPONSE 1

#define	MESSAGE_T_SRV 33

#define	MESSAGE_C_IN 1

#define	RESOLVER_BUF_MAX 65536

#define	BUF_OVERFLOW_CHECK(ptr, len)

Functions
static int	resolver_raw_srv_lookup_buf (xmpp_ctx_t ctx, const unsigned char buf, size_t len, resolver_srv_rr_t **srv_rr_list)

void	resolver_initialize (void)

void	resolver_shutdown (void)

resolver_srv_rr_t *	resolver_srv_rr_new (xmpp_ctx_t ctx, const char host, unsigned short port, unsigned short prio, unsigned short weight)

static void	resolver_srv_list_sort (resolver_srv_rr_t **srv_rr_list)

int	resolver_srv_lookup_buf (xmpp_ctx_t ctx, const unsigned char buf, size_t len, resolver_srv_rr_t **srv_rr_list)
	Perform lookup for RFC1035 message format. More...

int	resolver_srv_lookup (xmpp_ctx_t ctx, const char service, const char proto, const char domain, resolver_srv_rr_t **srv_rr_list)
	Resolve SRV record. More...

void	resolver_srv_free (xmpp_ctx_t ctx, resolver_srv_rr_t srv_rr_list)
	Release a list returned by resolver_srv_lookup() or resolver_srv_lookup_buf(). More...

static uint16_t	xmpp_ntohs_ptr (const void *ptr)

static uint8_t	message_header_qr (const struct message_header *header)

static uint8_t	message_header_rcode (const struct message_header *header)

static size_t	message_name_append_safe (char name, size_t name_len, size_t name_max, const char tail, size_t tail_len)

static unsigned	message_name_get (const unsigned char buf, size_t buf_len, unsigned buf_offset, char name, size_t name_max)

static unsigned	message_name_len (const unsigned char *buf, size_t buf_len, unsigned buf_offset)

Detailed Description

DNS resolver.

Macro Definition Documentation

◆ MESSAGE_HEADER_LEN

#define MESSAGE_HEADER_LEN 12

◆ MESSAGE_RESPONSE

#define MESSAGE_RESPONSE 1

◆ MESSAGE_T_SRV

#define MESSAGE_T_SRV 33

◆ MESSAGE_C_IN

#define MESSAGE_C_IN 1

◆ RESOLVER_BUF_MAX

#define RESOLVER_BUF_MAX 65536

◆ BUF_OVERFLOW_CHECK

#define BUF_OVERFLOW_CHECK	(	ptr,
		len
	)

Value:

    do {                                              \
        if ((ptr) >= (len)) {                         \
            if (*srv_rr_list != NULL)                 \
                resolver_srv_free(ctx, *srv_rr_list); \
            *srv_rr_list = NULL;                      \
            return XMPP_DOMAIN_NOT_FOUND;             \
        }                                             \
    } while (0)

Function Documentation

◆ resolver_raw_srv_lookup_buf()

static int resolver_raw_srv_lookup_buf	(	xmpp_ctx_t *	ctx,
		const unsigned char *	buf,
		size_t	len,
		resolver_srv_rr_t **	srv_rr_list
	)

static

◆ resolver_initialize()

void resolver_initialize ( void )

◆ resolver_shutdown()

void resolver_shutdown ( void )

◆ resolver_srv_rr_new()

resolver_srv_rr_t* resolver_srv_rr_new	(	xmpp_ctx_t *	ctx,
		const char *	host,
		unsigned short	port,
		unsigned short	prio,
		unsigned short	weight
	)

◆ resolver_srv_list_sort()

static void resolver_srv_list_sort ( resolver_srv_rr_t ** srv_rr_list )