#include "spf.h"
#include "util.h"
#include "dns.h"
#include "../../config.h"
Include dependency graph for dns.c:
Go to the source code of this file.
Functions | |
char * | DNS_query (peer_info_t *p, const char *s, const int T_TYPE, const char *mta) |
Execute a DNS query. | |
char * | DNS_txt_answer (int16_t ancount, const u_char *msg_ptr, const u_char *eom_ptr, u_char *rd_ptr, char *buf, int *ttl) |
Process a DNS message of type T_TXT. | |
char * | DNS_mx_answer (int16_t ancount, const u_char *msg_ptr, const u_char *eom_ptr, u_char *rd_ptr, char *buf, int *ttl) |
Process a DNS message of type T_MX. | |
SPF_BOOL | DNS_ptr_answer (peer_info_t *p, int16_t ancount, const u_char *msg_ptr, const u_char *eom_ptr, u_char *rd_ptr, char *buf, const char *mta, int *ttl) |
Process a DNS message of type T_PTR. | |
char * | DNS_cname_answer (int16_t ancount, const u_char *msg_ptr, const u_char *eom_ptr, u_char *rd_ptr, char *buf, int *ttl) |
Process a DNS message of type T_MX. | |
SPF_BOOL | DNS_check_client_reverse (peer_info_t *p) |
Variables | |
void * | dns_mutex |
dns.c contains functions relating to the execution and processing of DNS queries. Each particular DNS record type has a unique function that is designed to process such a response.
Definition in file dns.c.
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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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