snmp plugin: Reworked/fixed res->errstat check

[collectd.git] / src / snmp.c

diff --git a/src/snmp.c b/src/snmp.c
index ae2b0d4..8faccbe 100644 (file)
--- a/src/snmp.c
+++ b/src/snmp.c
@@ -130,8 +130,7 @@ static void csnmp_oid_init(oid_t *dst, oid const *src, size_t n) {
 }
 
 static int csnmp_oid_compare(oid_t const *left, oid_t const *right) {
-  return snmp_oid_compare(left->oid, left->oid_len, right->oid,
-                          right->oid_len);
+  return snmp_oid_compare(left->oid, left->oid_len, right->oid, right->oid_len);
 }
 
 static int csnmp_oid_suffix(oid_t *dst, oid_t const *src, oid_t const *root) {
@@ -712,7 +711,6 @@ static int csnmp_config_add_host(oconfig_item_t *ci) {
       });
   if (status != 0) {
     ERROR("snmp plugin: Registering complex read function failed.");
-    csnmp_host_definition_destroy(hd);
     return -1;
   }
 
@@ -998,9 +996,9 @@ static int csnmp_strvbcopy(char *dst, /* {{{ */
     src = (char *)vb->val.bitstring;
   else if (vb->type == ASN_IPADDRESS) {
     return snprintf(dst, dst_size,
-                     "%" PRIu8 ".%" PRIu8 ".%" PRIu8 ".%" PRIu8 "",
-                     (uint8_t)vb->val.string[0], (uint8_t)vb->val.string[1],
-                     (uint8_t)vb->val.string[2], (uint8_t)vb->val.string[3]);
+                    "%" PRIu8 ".%" PRIu8 ".%" PRIu8 ".%" PRIu8 "",
+                    (uint8_t)vb->val.string[0], (uint8_t)vb->val.string[1],
+                    (uint8_t)vb->val.string[2], (uint8_t)vb->val.string[3]);
   } else {
     dst[0] = 0;
     return EINVAL;
@@ -1223,7 +1221,7 @@ static int csnmp_dispatch_table(host_definition_t *host,
         sstrncpy(vl.type_instance, temp, sizeof(vl.type_instance));
       else
         snprintf(vl.type_instance, sizeof(vl.type_instance), "%s%s",
-                  data->instance_prefix, temp);
+                 data->instance_prefix, temp);
     }
 
     vl.values_len = data->values_len;
@@ -1390,6 +1388,50 @@ static int csnmp_read_table(host_definition_t *host, data_definition_t *data) {
       break;
     }
 
+    if (res->errstat != SNMP_ERR_NOERROR) {
+      if (res->errindex != 0) {
+        /* Find the OID which caused error */
+        for (i = 1, vb = res->variables; vb != NULL && i != res->errindex;
+             vb = vb->next_variable, i++)
+          /* do nothing */;
+      }
+
+      if ((res->errindex == 0) || (vb == NULL)) {
+        ERROR("snmp plugin: host %s; data %s: response error: %s (%li) ",
+              host->name, data->name, snmp_errstring(res->errstat),
+              res->errstat);
+        status = -1;
+        break;
+      }
+
+      char oid_buffer[1024] = {0};
+      snprint_objid(oid_buffer, sizeof(oid_buffer) - 1, vb->name,
+                    vb->name_length);
+      NOTICE("snmp plugin: host %s; data %s: OID `%s` failed: %s", host->name,
+             data->name, oid_buffer, snmp_errstring(res->errstat));
+
+      /* Calculate value index from todo list and skip OID found */
+      i = 0;
+      size_t j = 1;
+      for (;;) {
+        while ((i < oid_list_len) && !oid_list_todo[i])
+          i++;
+
+        if (j == res->errindex)
+          break;
+
+        i++;
+        j++;
+      }
+
+      assert(i < oid_list_len);
+      oid_list_todo[i] = 0;
+
+      snmp_free_pdu(res);
+      res = NULL;
+      continue;
+    }
+
     for (vb = res->variables, i = 0; (vb != NULL);
          vb = vb->next_variable, i++) {
       /* Calculate value index from todo list */