#include "../../config.h"
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <netdb.h>
#include <arpa/inet.h>
Include dependency graph for dns.h:
This graph shows which files directly or indirectly include this file:
Go to the source code of this file.
Defines | |
#define | _DNS_H 1 |
#define | SPF_PACKETSZ 8192 |
#define | SPF_MAXDNAME 1025 |
#define | SPF_MAXCDNAME 255 |
#define | xgethostbyname(a, b, c, d, e) gethostbyname((a)) |
#define | xgethostbyname_free() |
Functions | |
void | _DNS_gethostbyname_r_free (void) |
char * | DNS_query (peer_info_t *, const char *, const int T_TYPE, const char *) |
Execute a DNS query. | |
char * | DNS_txt_answer (int16_t, const u_char *, const u_char *, u_char *, char *, int *) |
Process a DNS message of type T_TXT. | |
char * | DNS_mx_answer (int16_t, const u_char *, const u_char *, u_char *, char *, int *) |
Process a DNS message of type T_MX. | |
SPF_BOOL | DNS_ptr_answer (peer_info_t *, int16_t, const u_char *, const u_char *, u_char *, char *, const char *, int *) |
Process a DNS message of type T_PTR. | |
char * | DNS_cname_answer (int16_t, const u_char *, const u_char *, u_char *, char *, int *) |
Process a DNS message of type T_MX. | |
SPF_BOOL | DNS_check_client_reverse (peer_info_t *) |
Variables | |
int | h_errno |
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Definition at line 89 of file dns.h. Referenced by DNS_check_client_reverse(), DNS_cname_answer(), DNS_mx_answer(), DNS_ptr_answer(), and DNS_txt_answer(). |
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Definition at line 88 of file dns.h. Referenced by DNS_check_client_reverse(), and DNS_query(). |
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Definition at line 87 of file dns.h. Referenced by DNS_check_client_reverse(), and DNS_query(). |
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Definition at line 121 of file dns.h. Referenced by UTIL_a_cmp(), and UTIL_validate_hostname(). |
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Definition at line 122 of file dns.h. Referenced by UTIL_a_cmp(), and UTIL_validate_hostname(). |
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Definition at line 975 of file dns.c. References peer_info_t, peer_info_s::r_ip, peer_info_s::r_vhname, SPF_BOOL, SPF_FALSE, SPF_MAXCDNAME, SPF_MAXDNAME, SPF_PACKETSZ, SPF_TRUE, UTIL_rev_addr(), UTIL_validate_hostname(), xepprintf, xeprintf, xfree, xpprintf, xstrndup, and xvprintf. Referenced by MACRO_process(). Here is the call graph for this function: ![]() |
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Process a DNS message of type T_MX.
Date: 29/04/04
Desc: References h_errno, SPF_MAXCDNAME, xepprintf, xmalloc, xpprintf, xrealloc, and xvprintf. Referenced by DNS_query(). |
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Process a DNS message of type T_MX.
Date: 01/02/04 Desc: SPF_PACKETSZ bytes are allocated and then filled with chars. This buffer is then used in an MX DNS query using data from the passed peer_info_t structure. Upon success this buffer is re-cast as a char * and then a pointer to this memory is returned. Upon failure a NULL pointer is returned. Definition at line 611 of file dns.c. References h_errno, SPF_MAXCDNAME, xmalloc, xprintf, xrealloc, and xvprintf. Referenced by DNS_query(). |
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Process a DNS message of type T_PTR.
Date: 01/02/04 Desc: A reverse lookup on an IP address leads to a lookup per returned PTR answer to see if the returned answer matches. The forward lookups are handled by a separate function which calls gethostbyname. Upon a single successful match of a forward lookup with a reverse lookup, returns SPF_TRUE. Returns SPF_FALSE upon failure. Definition at line 716 of file dns.c. References h_errno, peer_info_t, SPF_BOOL, SPF_FALSE, SPF_MAXCDNAME, SPF_TRUE, UTIL_validate_hostname(), xepprintf, and xvprintf. Referenced by DNS_query(). Here is the call graph for this function: ![]() |
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Execute a DNS query.
Author: Travis Anderson <tanderson@codeshare.ca>
Date: 12/10/03 Desc: Executes a DNS query of type T_TYPE and then calls the appropriate answer parsing function based on that type. Returns a pointer to allocated memory (a string of space delimited records). Upon failure returns NULL. Definition at line 217 of file dns.c. References DNS_cname_answer(), DNS_mx_answer(), DNS_ptr_answer(), DNS_txt_answer(), peer_info_s::error, h_errno, peer_info_t, SPF_ERROR, SPF_FALSE, SPF_MAX_ERROR, SPF_MAXDNAME, SPF_NONE, SPF_PACKETSZ, SPF_TRUE, UTIL_assoc_prefix(), xepprintf, xprintf, and xvprintf. Referenced by SPF_parse_policy(), SPF_policy_main_rec(), UTIL_mx_cmp(), UTIL_ptr_cmp(), and UTIL_validate_ptr(). Here is the call graph for this function: ![]() |
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Process a DNS message of type T_TXT.
Date: 01/02/04 Desc: SPF_PACKETSZ bytes are allocated and then filled with chars. This buffer is then used in a TXT DNS query using data from the passed peer_info_t structure. Upon success this buffer is re-cast as a char * and then a pointer to this memory is returned. Upon failure a NULL pointer is returned. Definition at line 419 of file dns.c. References h_errno, SPF_MAX_STR, SPF_MAXCDNAME, xepprintf, xfree, xmalloc, xpprintf, xrealloc, xstrndup, and xvprintf. Referenced by DNS_query(). |
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Definition at line 59 of file main.c. Referenced by DNS_cname_answer(), DNS_mx_answer(), DNS_ptr_answer(), DNS_query(), and DNS_txt_answer(). |