diff options
Diffstat (limited to 'contrib/sendmail/src/sm_resolve.c')
| -rw-r--r-- | contrib/sendmail/src/sm_resolve.c | 456 |
1 files changed, 0 insertions, 456 deletions
diff --git a/contrib/sendmail/src/sm_resolve.c b/contrib/sendmail/src/sm_resolve.c deleted file mode 100644 index 035a9e5..0000000 --- a/contrib/sendmail/src/sm_resolve.c +++ /dev/null @@ -1,456 +0,0 @@ -/* - * Copyright (c) 2000-2004 Sendmail, Inc. and its suppliers. - * All rights reserved. - * - * By using this file, you agree to the terms and conditions set - * forth in the LICENSE file which can be found at the top level of - * the sendmail distribution. - * - */ - -/* - * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan - * (Royal Institute of Technology, Stockholm, Sweden). - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the Institute nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sendmail.h> -#if DNSMAP -# if NAMED_BIND -# include "sm_resolve.h" - -SM_RCSID("$Id: sm_resolve.c,v 8.35 2007/06/25 16:20:14 ca Exp $") - -static struct stot -{ - const char *st_name; - int st_type; -} stot[] = -{ -# if NETINET - { "A", T_A }, -# endif /* NETINET */ -# if NETINET6 - { "AAAA", T_AAAA }, -# endif /* NETINET6 */ - { "NS", T_NS }, - { "CNAME", T_CNAME }, - { "PTR", T_PTR }, - { "MX", T_MX }, - { "TXT", T_TXT }, - { "AFSDB", T_AFSDB }, - { "SRV", T_SRV }, - { NULL, 0 } -}; - -static DNS_REPLY_T *parse_dns_reply __P((unsigned char *, int)); - -/* -** DNS_STRING_TO_TYPE -- convert resource record name into type -** -** Parameters: -** name -- name of resource record type -** -** Returns: -** type if succeeded. -** -1 otherwise. -*/ - -int -dns_string_to_type(name) - const char *name; -{ - struct stot *p = stot; - - for (p = stot; p->st_name != NULL; p++) - if (sm_strcasecmp(name, p->st_name) == 0) - return p->st_type; - return -1; -} - -/* -** DNS_TYPE_TO_STRING -- convert resource record type into name -** -** Parameters: -** type -- resource record type -** -** Returns: -** name if succeeded. -** NULL otherwise. -*/ - -const char * -dns_type_to_string(type) - int type; -{ - struct stot *p = stot; - - for (p = stot; p->st_name != NULL; p++) - if (type == p->st_type) - return p->st_name; - return NULL; -} - -/* -** DNS_FREE_DATA -- free all components of a DNS_REPLY_T -** -** Parameters: -** r -- pointer to DNS_REPLY_T -** -** Returns: -** none. -*/ - -void -dns_free_data(r) - DNS_REPLY_T *r; -{ - RESOURCE_RECORD_T *rr; - - if (r->dns_r_q.dns_q_domain != NULL) - sm_free(r->dns_r_q.dns_q_domain); - for (rr = r->dns_r_head; rr != NULL; ) - { - RESOURCE_RECORD_T *tmp = rr; - - if (rr->rr_domain != NULL) - sm_free(rr->rr_domain); - if (rr->rr_u.rr_data != NULL) - sm_free(rr->rr_u.rr_data); - rr = rr->rr_next; - sm_free(tmp); - } - sm_free(r); -} - -/* -** PARSE_DNS_REPLY -- parse DNS reply data. -** -** Parameters: -** data -- pointer to dns data -** len -- len of data -** -** Returns: -** pointer to DNS_REPLY_T if succeeded. -** NULL otherwise. -*/ - -static DNS_REPLY_T * -parse_dns_reply(data, len) - unsigned char *data; - int len; -{ - unsigned char *p; - ushort ans_cnt, ui; - int status; - size_t l; - char host[MAXHOSTNAMELEN]; - DNS_REPLY_T *r; - RESOURCE_RECORD_T **rr; - - r = (DNS_REPLY_T *) sm_malloc(sizeof(*r)); - if (r == NULL) - return NULL; - memset(r, 0, sizeof(*r)); - - p = data; - - /* doesn't work on Crays? */ - memcpy(&r->dns_r_h, p, sizeof(r->dns_r_h)); - p += sizeof(r->dns_r_h); - status = dn_expand(data, data + len, p, host, sizeof(host)); - if (status < 0) - { - dns_free_data(r); - return NULL; - } - r->dns_r_q.dns_q_domain = sm_strdup(host); - if (r->dns_r_q.dns_q_domain == NULL) - { - dns_free_data(r); - return NULL; - } - - ans_cnt = ntohs((ushort) r->dns_r_h.ancount); - - p += status; - GETSHORT(r->dns_r_q.dns_q_type, p); - GETSHORT(r->dns_r_q.dns_q_class, p); - rr = &r->dns_r_head; - ui = 0; - while (p < data + len && ui < ans_cnt) - { - int type, class, ttl, size, txtlen; - - status = dn_expand(data, data + len, p, host, sizeof(host)); - if (status < 0) - { - dns_free_data(r); - return NULL; - } - ++ui; - p += status; - GETSHORT(type, p); - GETSHORT(class, p); - GETLONG(ttl, p); - GETSHORT(size, p); - if (p + size > data + len) - { - /* - ** announced size of data exceeds length of - ** data paket: someone is cheating. - */ - - if (LogLevel > 5) - sm_syslog(LOG_WARNING, NOQID, - "ERROR: DNS RDLENGTH=%d > data len=%d", - size, len - (p - data)); - dns_free_data(r); - return NULL; - } - *rr = (RESOURCE_RECORD_T *) sm_malloc(sizeof(**rr)); - if (*rr == NULL) - { - dns_free_data(r); - return NULL; - } - memset(*rr, 0, sizeof(**rr)); - (*rr)->rr_domain = sm_strdup(host); - if ((*rr)->rr_domain == NULL) - { - dns_free_data(r); - return NULL; - } - (*rr)->rr_type = type; - (*rr)->rr_class = class; - (*rr)->rr_ttl = ttl; - (*rr)->rr_size = size; - switch (type) - { - case T_NS: - case T_CNAME: - case T_PTR: - status = dn_expand(data, data + len, p, host, - sizeof(host)); - if (status < 0) - { - dns_free_data(r); - return NULL; - } - (*rr)->rr_u.rr_txt = sm_strdup(host); - if ((*rr)->rr_u.rr_txt == NULL) - { - dns_free_data(r); - return NULL; - } - break; - - case T_MX: - case T_AFSDB: - status = dn_expand(data, data + len, p + 2, host, - sizeof(host)); - if (status < 0) - { - dns_free_data(r); - return NULL; - } - l = strlen(host) + 1; - (*rr)->rr_u.rr_mx = (MX_RECORD_T *) - sm_malloc(sizeof(*((*rr)->rr_u.rr_mx)) + l); - if ((*rr)->rr_u.rr_mx == NULL) - { - dns_free_data(r); - return NULL; - } - (*rr)->rr_u.rr_mx->mx_r_preference = (p[0] << 8) | p[1]; - (void) sm_strlcpy((*rr)->rr_u.rr_mx->mx_r_domain, - host, l); - break; - - case T_SRV: - status = dn_expand(data, data + len, p + 6, host, - sizeof(host)); - if (status < 0) - { - dns_free_data(r); - return NULL; - } - l = strlen(host) + 1; - (*rr)->rr_u.rr_srv = (SRV_RECORDT_T*) - sm_malloc(sizeof(*((*rr)->rr_u.rr_srv)) + l); - if ((*rr)->rr_u.rr_srv == NULL) - { - dns_free_data(r); - return NULL; - } - (*rr)->rr_u.rr_srv->srv_r_priority = (p[0] << 8) | p[1]; - (*rr)->rr_u.rr_srv->srv_r_weight = (p[2] << 8) | p[3]; - (*rr)->rr_u.rr_srv->srv_r_port = (p[4] << 8) | p[5]; - (void) sm_strlcpy((*rr)->rr_u.rr_srv->srv_r_target, - host, l); - break; - - case T_TXT: - - /* - ** The TXT record contains the length as - ** leading byte, hence the value is restricted - ** to 255, which is less than the maximum value - ** of RDLENGTH (size). Nevertheless, txtlen - ** must be less than size because the latter - ** specifies the length of the entire TXT - ** record. - */ - - txtlen = *p; - if (txtlen >= size) - { - if (LogLevel > 5) - sm_syslog(LOG_WARNING, NOQID, - "ERROR: DNS TXT record size=%d <= text len=%d", - size, txtlen); - dns_free_data(r); - return NULL; - } - (*rr)->rr_u.rr_txt = (char *) sm_malloc(txtlen + 1); - if ((*rr)->rr_u.rr_txt == NULL) - { - dns_free_data(r); - return NULL; - } - (void) sm_strlcpy((*rr)->rr_u.rr_txt, (char*) p + 1, - txtlen + 1); - break; - - default: - (*rr)->rr_u.rr_data = (unsigned char*) sm_malloc(size); - if ((*rr)->rr_u.rr_data == NULL) - { - dns_free_data(r); - return NULL; - } - (void) memcpy((*rr)->rr_u.rr_data, p, size); - break; - } - p += size; - rr = &(*rr)->rr_next; - } - *rr = NULL; - return r; -} - -/* -** DNS_LOOKUP_INT -- perform dns map lookup (internal helper routine) -** -** Parameters: -** domain -- name to lookup -** rr_class -- resource record class -** rr_type -- resource record type -** retrans -- retransmission timeout -** retry -- number of retries -** -** Returns: -** result of lookup if succeeded. -** NULL otherwise. -*/ - -DNS_REPLY_T * -dns_lookup_int(domain, rr_class, rr_type, retrans, retry) - const char *domain; - int rr_class; - int rr_type; - time_t retrans; - int retry; -{ - int len; - unsigned long old_options = 0; - time_t save_retrans = 0; - int save_retry = 0; - DNS_REPLY_T *r = NULL; - unsigned char reply[1024]; - - if (tTd(8, 16)) - { - old_options = _res.options; - _res.options |= RES_DEBUG; - sm_dprintf("dns_lookup(%s, %d, %s)\n", domain, - rr_class, dns_type_to_string(rr_type)); - } - if (retrans > 0) - { - save_retrans = _res.retrans; - _res.retrans = retrans; - } - if (retry > 0) - { - save_retry = _res.retry; - _res.retry = retry; - } - errno = 0; - SM_SET_H_ERRNO(0); - len = res_search(domain, rr_class, rr_type, reply, sizeof(reply)); - if (tTd(8, 16)) - { - _res.options = old_options; - sm_dprintf("dns_lookup(%s, %d, %s) --> %d\n", - domain, rr_class, dns_type_to_string(rr_type), len); - } - if (len >= 0) - r = parse_dns_reply(reply, len); - if (retrans > 0) - _res.retrans = save_retrans; - if (retry > 0) - _res.retry = save_retry; - return r; -} - -# if 0 -DNS_REPLY_T * -dns_lookup(domain, type_name, retrans, retry) - const char *domain; - const char *type_name; - time_t retrans; - int retry; -{ - int type; - - type = dns_string_to_type(type_name); - if (type == -1) - { - if (tTd(8, 16)) - sm_dprintf("dns_lookup: unknown resource type: `%s'\n", - type_name); - return NULL; - } - return dns_lookup_int(domain, C_IN, type, retrans, retry); -} -# endif /* 0 */ -# endif /* NAMED_BIND */ -#endif /* DNSMAP */ |
