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-rw-r--r--src/resolv/async_resolv.c171
-rw-r--r--src/resolv/async_resolv.h29
2 files changed, 200 insertions, 0 deletions
diff --git a/src/resolv/async_resolv.c b/src/resolv/async_resolv.c
index 13232097..9400021f 100644
--- a/src/resolv/async_resolv.c
+++ b/src/resolv/async_resolv.c
@@ -456,6 +456,177 @@ fail:
return NULL;
}
+static errno_t
+resolv_copy_in_addr(TALLOC_CTX *mem_ctx, struct resolv_addr *ret,
+ struct ares_addrttl *attl)
+{
+ ret->ipaddr = talloc_array(mem_ctx, uint8_t, sizeof(struct in_addr));
+ if (!ret->ipaddr) return ENOMEM;
+
+ memcpy(ret->ipaddr, &attl->ipaddr, sizeof(struct in_addr));
+ ret->ttl = attl->ttl;
+
+ return EOK;
+}
+
+static errno_t
+resolv_copy_in6_addr(TALLOC_CTX *mem_ctx, struct resolv_addr *ret,
+ struct ares_addr6ttl *a6ttl)
+{
+ ret->ipaddr = talloc_array(mem_ctx, uint8_t, sizeof(struct in6_addr));
+ if (!ret->ipaddr) return ENOMEM;
+
+ memcpy(ret->ipaddr, &a6ttl->ip6addr, sizeof(struct in6_addr));
+ ret->ttl = a6ttl->ttl;
+
+ return EOK;
+}
+
+static struct resolv_hostent *
+resolv_copy_hostent_common(TALLOC_CTX *mem_ctx, struct hostent *src)
+{
+ struct resolv_hostent *ret;
+ int len;
+ int i;
+
+ ret = talloc_zero(mem_ctx, struct resolv_hostent);
+ if (ret == NULL) {
+ return NULL;
+ }
+
+ if (src->h_name != NULL) {
+ ret->name = talloc_strdup(ret, src->h_name);
+ if (ret->name == NULL) {
+ goto fail;
+ }
+ }
+ if (src->h_aliases != NULL) {
+ for (len = 0; src->h_aliases[len] != NULL; len++);
+
+ ret->aliases = talloc_array(ret, char *, len + 1);
+ if (ret->aliases == NULL) {
+ goto fail;
+ }
+
+ for (i = 0; i < len; i++) {
+ ret->aliases[i] = talloc_strdup(ret->aliases, src->h_aliases[i]);
+ if (ret->aliases[i] == NULL) {
+ goto fail;
+ }
+ }
+ ret->aliases[len] = NULL;
+ }
+
+ ret->family = src->h_addrtype;
+ return ret;
+
+fail:
+ talloc_free(ret);
+ return NULL;
+}
+
+struct resolv_hostent *
+resolv_copy_hostent2(TALLOC_CTX *mem_ctx, struct hostent *src)
+{
+ struct resolv_hostent *ret;
+ int len;
+ int i;
+
+ ret = resolv_copy_hostent_common(mem_ctx, src);
+ if (ret == NULL) {
+ return NULL;
+ }
+
+ if (src->h_addr_list != NULL) {
+ for (len = 0; src->h_addr_list[len] != NULL; len++);
+
+ ret->addr_list = talloc_array(ret, struct resolv_addr *, len + 1);
+ if (ret->addr_list == NULL) {
+ goto fail;
+ }
+
+ for (i = 0; i < len; i++) {
+ ret->addr_list[i] = talloc_zero(ret->addr_list,
+ struct resolv_addr);
+ if (ret->addr_list[i] == NULL) {
+ goto fail;
+ }
+
+ ret->addr_list[i]->ipaddr = talloc_memdup(ret->addr_list[i],
+ src->h_addr_list[i],
+ src->h_length);
+ if (ret->addr_list[i]->ipaddr == NULL) {
+ goto fail;
+ }
+ ret->addr_list[i]->ttl = RESOLV_DEFAULT_TTL;
+ }
+ ret->addr_list[len] = NULL;
+ }
+ return ret;
+
+fail:
+ talloc_free(ret);
+ return NULL;
+}
+
+struct resolv_hostent *
+resolv_copy_hostent_ares(TALLOC_CTX *mem_ctx, struct hostent *src,
+ int family, void *ares_ttl_data,
+ int num_ares_ttl_data)
+{
+ struct resolv_hostent *ret;
+ errno_t cret;
+ int i;
+
+ ret = resolv_copy_hostent_common(mem_ctx, src);
+ if (ret == NULL) {
+ return NULL;
+ }
+
+ if (num_ares_ttl_data > 0) {
+ ret->addr_list = talloc_array(ret, struct resolv_addr *,
+ num_ares_ttl_data + 1);
+ if (ret->addr_list == NULL) {
+ goto fail;
+ }
+
+ for (i = 0; i < num_ares_ttl_data; i++) {
+ ret->addr_list[i] = talloc_zero(ret->addr_list,
+ struct resolv_addr);
+ if (ret->addr_list[i] == NULL) {
+ goto fail;
+ }
+
+ switch (family) {
+ case AF_INET:
+ cret = resolv_copy_in_addr(ret->addr_list, ret->addr_list[i],
+ &((struct ares_addrttl *) ares_ttl_data)[i]);
+ break;
+ case AF_INET6:
+ cret = resolv_copy_in6_addr(ret->addr_list, ret->addr_list[i],
+ &((struct ares_addr6ttl *) ares_ttl_data)[i]);
+ break;
+ default:
+ DEBUG(1, ("Unknown address family %d\n"));
+ goto fail;
+ }
+
+ if (cret != EOK) {
+ DEBUG(1, ("Could not copy address\n"));
+ goto fail;
+ }
+ }
+ ret->addr_list[num_ares_ttl_data] = NULL;
+ }
+
+ ret->family = family;
+ return ret;
+
+fail:
+ talloc_free(ret);
+ return NULL;
+}
+
/*******************************************************************
* Get host by name. *
*******************************************************************/
diff --git a/src/resolv/async_resolv.h b/src/resolv/async_resolv.h
index d6cbe149..00e1bdfb 100644
--- a/src/resolv/async_resolv.h
+++ b/src/resolv/async_resolv.h
@@ -37,6 +37,10 @@
#include "resolv/ares/ares_data.h"
#endif /* HAVE_ARES_DATA */
+#ifndef RESOLV_DEFAULT_TTL
+#define RESOLV_DEFAULT_TTL 7200
+#endif /* RESOLV_DEFAULT_TTL */
+
/*
* An opaque structure which holds context for a module using the async
* resolver. Is should be used as a "local-global" variable - in sssd,
@@ -53,6 +57,31 @@ void resolv_reread_configuration(void);
const char *resolv_strerror(int ares_code);
+/* If resolv_hostent->family is AF_INET, then ipaddr points to
+ * struct in_addr, else if family is AF_INET6, ipaddr points to
+ * struct in6_addr
+ */
+struct resolv_addr {
+ uint8_t *ipaddr;
+ int ttl;
+};
+
+struct resolv_hostent {
+ char *name; /* official name of host */
+ char **aliases; /* alias list */
+ int family; /* host address type */
+
+ struct resolv_addr **addr_list; /* list of addresses */
+};
+
+struct resolv_hostent *
+resolv_copy_hostent2(TALLOC_CTX *mem_ctx, struct hostent *src);
+
+struct resolv_hostent *
+resolv_copy_hostent_ares(TALLOC_CTX *mem_ctx, struct hostent *src,
+ int family, void *ares_ttl_data,
+ int num_ares_ttl_data);
+
struct hostent *resolv_copy_hostent(TALLOC_CTX *mem_ctx,
struct hostent *src);
generated by cgit (git 2.34.1) at 2024-11-08 20:45:36 +0000