resolved: allow passing on which protocol, family and interface to look something up

[elogind.git] / src / nss-resolve / nss-resolve.c

diff --git a/src/nss-resolve/nss-resolve.c b/src/nss-resolve/nss-resolve.c
index b2cb19a7b42918afd2dbb21ed50ecf88352d5156..bc55acf8ddcad0f3c5bd2185131dcb0e6b742c9b 100644 (file)
--- a/src/nss-resolve/nss-resolve.c
+++ b/src/nss-resolve/nss-resolve.c
@@ -66,23 +66,27 @@ static bool bus_error_shall_fallback(sd_bus_error *e) {
 }
 
 static int count_addresses(sd_bus_message *m, int af, const char **canonical) {
-        int c = 0, r;
+        int c = 0, r, ifindex;
 
         assert(m);
         assert(canonical);
 
-        r = sd_bus_message_enter_container(m, 'a', "(iayi)");
+        r = sd_bus_message_read(m, "i", &ifindex);
         if (r < 0)
                 return r;
 
-        while ((r = sd_bus_message_enter_container(m, 'r', "iayi")) > 0) {
+        r = sd_bus_message_enter_container(m, 'a', "(iay)");
+        if (r < 0)
+                return r;
+
+        while ((r = sd_bus_message_enter_container(m, 'r', "iay")) > 0) {
                 int family;
 
                 r = sd_bus_message_read(m, "i", &family);
                 if (r < 0)
                         return r;
 
-                r = sd_bus_message_skip(m, "ayi");
+                r = sd_bus_message_skip(m, "ay");
                 if (r < 0)
                         return r;
 
@@ -123,11 +127,11 @@ enum nss_status _nss_resolve_gethostbyname4_r(
         _cleanup_bus_message_unref_ sd_bus_message *req = NULL, *reply = NULL;
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         struct gaih_addrtuple *r_tuple, *r_tuple_first = NULL;
-        _cleanup_bus_unref_ sd_bus *bus = NULL;
+        _cleanup_bus_close_unref_ sd_bus *bus = NULL;
         const char *canonical = NULL;
         size_t l, ms, idx;
         char *r_name;
-        int c, r, i = 0;
+        int c, r, i = 0, ifindex;
 
         assert(name);
         assert(pat);
@@ -153,7 +157,7 @@ enum nss_status _nss_resolve_gethostbyname4_r(
         if (r < 0)
                 goto fail;
 
-        r = sd_bus_message_append(req, "si", name, AF_UNSPEC);
+        r = sd_bus_message_append(req, "isit", 0, name, AF_UNSPEC, (uint64_t) 0);
         if (r < 0)
                 goto fail;
 
@@ -219,12 +223,21 @@ enum nss_status _nss_resolve_gethostbyname4_r(
         /* Second, append addresses */
         r_tuple_first = (struct gaih_addrtuple*) (buffer + idx);
 
-        r = sd_bus_message_enter_container(reply, 'a', "(iayi)");
+        r = sd_bus_message_read(reply, "i", &ifindex);
+        if (r < 0)
+                goto fail;
+
+        if (ifindex < 0) {
+                r = -EINVAL;
+                goto fail;
+        }
+
+        r = sd_bus_message_enter_container(reply, 'a', "(iay)");
         if (r < 0)
                 goto fail;
 
-        while ((r = sd_bus_message_enter_container(reply, 'r', "iayi")) > 0) {
-                int family, ifindex;
+        while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
+                int family;
                 const void *a;
                 size_t sz;
 
@@ -236,10 +249,6 @@ enum nss_status _nss_resolve_gethostbyname4_r(
                 if (r < 0)
                         goto fail;
 
-                r = sd_bus_message_read(reply, "i", &ifindex);
-                if (r < 0)
-                        goto fail;
-
                 r = sd_bus_message_exit_container(reply);
                 if (r < 0)
                         goto fail;
@@ -252,11 +261,6 @@ enum nss_status _nss_resolve_gethostbyname4_r(
                         goto fail;
                 }
 
-                if (ifindex < 0) {
-                        r = -EINVAL;
-                        goto fail;
-                }
-
                 r_tuple = (struct gaih_addrtuple*) (buffer + idx);
                 r_tuple->next = i == c-1 ? NULL : (struct gaih_addrtuple*) ((char*) r_tuple + ALIGN(sizeof(struct gaih_addrtuple)));
                 r_tuple->name = r_name;
@@ -281,6 +285,11 @@ enum nss_status _nss_resolve_gethostbyname4_r(
         if (ttlp)
                 *ttlp = 0;
 
+        /* Explicitly reset all error variables */
+        *errnop = 0;
+        *h_errnop = NETDB_SUCCESS;
+        h_errno = 0;
+
         return NSS_STATUS_SUCCESS;
 
 fail:
@@ -301,10 +310,10 @@ enum nss_status _nss_resolve_gethostbyname3_r(
         _cleanup_bus_message_unref_ sd_bus_message *req = NULL, *reply = NULL;
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         char *r_name, *r_aliases, *r_addr, *r_addr_list;
-        _cleanup_bus_unref_ sd_bus *bus = NULL;
+        _cleanup_bus_close_unref_ sd_bus *bus = NULL;
         size_t l, idx, ms, alen;
         const char *canonical;
-        int c, r, i = 0;
+        int c, r, i = 0, ifindex;
 
         assert(name);
         assert(result);
@@ -338,7 +347,7 @@ enum nss_status _nss_resolve_gethostbyname3_r(
         if (r < 0)
                 goto fail;
 
-        r = sd_bus_message_append(req, "si", name, af);
+        r = sd_bus_message_append(req, "isit", 0, name, af, (uint64_t) 0);
         if (r < 0)
                 goto fail;
 
@@ -419,12 +428,21 @@ enum nss_status _nss_resolve_gethostbyname3_r(
         /* Third, append addresses */
         r_addr = buffer + idx;
 
-        r = sd_bus_message_enter_container(reply, 'a', "(iayi)");
+        r = sd_bus_message_read(reply, "i", &ifindex);
         if (r < 0)
                 goto fail;
 
-        while ((r = sd_bus_message_enter_container(reply, 'r', "iayi")) > 0) {
-                int family, ifindex;
+        if (ifindex < 0) {
+                r = -EINVAL;
+                goto fail;
+        }
+
+        r = sd_bus_message_enter_container(reply, 'a', "(iay)");
+        if (r < 0)
+                goto fail;
+
+        while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
+                int family;
                 const void *a;
                 size_t sz;
 
@@ -436,10 +454,6 @@ enum nss_status _nss_resolve_gethostbyname3_r(
                 if (r < 0)
                         goto fail;
 
-                r = sd_bus_message_read(reply, "i", &ifindex);
-                if (r < 0)
-                        goto fail;
-
                 r = sd_bus_message_exit_container(reply);
                 if (r < 0)
                         goto fail;
@@ -482,6 +496,11 @@ enum nss_status _nss_resolve_gethostbyname3_r(
         result->h_length = alen;
         result->h_addr_list = (char**) r_addr_list;
 
+        /* Explicitly reset all error variables */
+        *errnop = 0;
+        *h_errnop = NETDB_SUCCESS;
+        h_errno = 0;
+
         if (ttlp)
                 *ttlp = 0;
 
@@ -507,11 +526,11 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
         _cleanup_bus_message_unref_ sd_bus_message *req = NULL, *reply = NULL;
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         char *r_name, *r_aliases, *r_addr, *r_addr_list;
-        _cleanup_bus_unref_ sd_bus *bus = NULL;
+        _cleanup_bus_close_unref_ sd_bus *bus = NULL;
         unsigned c = 0, i = 0;
         size_t ms = 0, idx;
         const char *n;
-        int r;
+        int r, ifindex;
 
         assert(addr);
         assert(result);
@@ -549,7 +568,7 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
         if (r < 0)
                 goto fail;
 
-        r = sd_bus_message_append(req, "i", af);
+        r = sd_bus_message_append(req, "ii", 0, af);
         if (r < 0)
                 goto fail;
 
@@ -557,7 +576,7 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
         if (r < 0)
                 goto fail;
 
-        r = sd_bus_message_append(req, "i", 0);
+        r = sd_bus_message_append(req, "t", (uint64_t) 0);
         if (r < 0)
                 goto fail;
 
@@ -597,6 +616,15 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
                 return NSS_STATUS_UNAVAIL;
         }
 
+        r = sd_bus_message_read(reply, "i", &ifindex);
+        if (r < 0)
+                goto fail;
+
+        if (ifindex < 0) {
+                r = -EINVAL;
+                goto fail;
+        }
+
         r = sd_bus_message_enter_container(reply, 'a', "s");
         if (r < 0)
                 goto fail;
@@ -675,6 +703,11 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
         if (ttlp)
                 *ttlp = 0;
 
+        /* Explicitly reset all error variables */
+        *errnop = 0;
+        *h_errnop = NETDB_SUCCESS;
+        h_errno = 0;
+
         return NSS_STATUS_SUCCESS;
 
 fail: