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base/SOURCES/net-snmp-5.7.2-ipAddress-fa...

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diff -urNp old/agent/mibgroup/ip-mib/data_access/ipaddress_common.c new/agent/mibgroup/ip-mib/data_access/ipaddress_common.c
--- old/agent/mibgroup/ip-mib/data_access/ipaddress_common.c 2012-10-10 00:28:58.000000000 +0200
+++ new/agent/mibgroup/ip-mib/data_access/ipaddress_common.c 2017-04-04 11:02:42.391951747 +0200
@@ -67,6 +67,7 @@ netsnmp_container *
netsnmp_access_ipaddress_container_init(u_int flags)
{
netsnmp_container *container1;
+ int rc;
DEBUGMSGTL(("access:ipaddress:container", "init\n"));
@@ -80,6 +81,7 @@ netsnmp_access_ipaddress_container_init(
return NULL;
}
container1->container_name = strdup("ia_index");
+ CONTAINER_SET_OPTIONS(container1, CONTAINER_KEY_ALLOW_DUPLICATES, rc);
if (flags & NETSNMP_ACCESS_IPADDRESS_INIT_ADDL_IDX_BY_ADDR) {
netsnmp_container *container2 =
@@ -92,6 +94,13 @@ netsnmp_access_ipaddress_container_init(
container2->compare = _access_ipaddress_entry_compare_addr;
container2->container_name = strdup("ia_addr");
+
+ /*
+ * With allowed duplicates, CONTAINER_INSERT does not need to sort whole
+ * container and check for duplicates. We remove duplicates manually in
+ * netsnmp_access_ipaddress_container_load.
+ */
+ CONTAINER_SET_OPTIONS(container2, CONTAINER_KEY_ALLOW_DUPLICATES, rc);
netsnmp_container_add_index(container1, container2);
}
@@ -100,6 +109,53 @@ netsnmp_access_ipaddress_container_init(
}
/**
+ * Remove duplicate entries from the container.
+ * This function returns new copy of the container and destroys
+ * the original one. Use like this:
+ * c = _remove_duplicates(c, flags);
+ */
+static netsnmp_container *
+_remove_duplicates(netsnmp_container *container, u_int container_flags)
+{
+ netsnmp_container *c;
+ netsnmp_iterator *it;
+ netsnmp_container *ret;
+ netsnmp_ipaddress_entry *entry, *prev_entry;
+
+ if (! (container_flags & NETSNMP_ACCESS_IPADDRESS_INIT_ADDL_IDX_BY_ADDR)) {
+ /* We don't have address index, we can't detect duplicates */
+ return container;
+ }
+
+ ret = netsnmp_access_ipaddress_container_init(container_flags);
+
+ /* use the IpAddress index */
+ c = container->next;
+ it = CONTAINER_ITERATOR(c);
+ /* Sort the address index */
+ CONTAINER_FIND(c, ITERATOR_FIRST(it));
+
+
+ /*
+ * Sequentially iterate over sorted container and add only unique entries
+ * to 'ret'
+ */
+ prev_entry = NULL;
+ for (entry = ITERATOR_FIRST(it); entry; entry = ITERATOR_NEXT(it)) {
+ if (prev_entry && _access_ipaddress_entry_compare_addr(prev_entry, entry) == 0) {
+ /* 'entry' is duplicate of the previous one -> delete it */
+ netsnmp_access_ipaddress_entry_free(entry);
+ } else {
+ CONTAINER_INSERT(ret, entry);
+ prev_entry = entry;
+ }
+ }
+ CONTAINER_FREE(container);
+ free(it);
+ return ret;
+}
+
+/**
* @retval NULL error
* @retval !NULL pointer to container
*/
@@ -112,9 +168,10 @@ netsnmp_access_ipaddress_container_load(
DEBUGMSGTL(("access:ipaddress:container", "load\n"));
+ if (load_flags & NETSNMP_ACCESS_IPADDRESS_LOAD_ADDL_IDX_BY_ADDR)
+ container_flags |= NETSNMP_ACCESS_IPADDRESS_INIT_ADDL_IDX_BY_ADDR;
+
if (NULL == container) {
- if (load_flags & NETSNMP_ACCESS_IPADDRESS_LOAD_ADDL_IDX_BY_ADDR)
- container_flags |= NETSNMP_ACCESS_IPADDRESS_INIT_ADDL_IDX_BY_ADDR;
container = netsnmp_access_ipaddress_container_init(container_flags);
}
if (NULL == container) {
@@ -129,6 +186,9 @@ netsnmp_access_ipaddress_container_load(
container = NULL;
}
+ if (container)
+ container = _remove_duplicates(container, container_flags);
+
return container;
}
diff -urNp old/agent/mibgroup/ip-mib/ipAddressTable/ipAddressTable_data_access.c new/agent/mibgroup/ip-mib/ipAddressTable/ipAddressTable_data_access.c
--- old/agent/mibgroup/ip-mib/ipAddressTable/ipAddressTable_data_access.c 2012-10-10 00:28:58.000000000 +0200
+++ new/agent/mibgroup/ip-mib/ipAddressTable/ipAddressTable_data_access.c 2017-04-04 13:26:34.332529808 +0200
@@ -137,6 +137,13 @@ ipAddressTable_container_init(netsnmp_co
*container_ptr_ptr =
netsnmp_container_find("ipAddressTable:table_container");
if (NULL != *container_ptr_ptr) {
+ /*
+ * The container has ALLOW_DUPLICATES flag to speed up CONTAINER_INSERT
+ * operations (it does not need to check for duplicates), however we
+ * (manually) ensure that we won't insert any duplicates there.
+ */
+ int rc;
+ CONTAINER_SET_OPTIONS(*container_ptr_ptr, CONTAINER_KEY_ALLOW_DUPLICATES, rc);
(*container_ptr_ptr)->container_name = strdup("ipAddressTable");
ipAddressTable_container_load(*container_ptr_ptr);
CONTAINER_FOR_EACH(*container_ptr_ptr,
@@ -205,8 +212,9 @@ static void
_check_entry_for_updates(ipAddressTable_rowreq_ctx * rowreq_ctx,
void **magic)
{
- netsnmp_container *ipaddress_container = (netsnmp_container*)magic[0];
+ netsnmp_container *ipaddress_container = magic[0];
netsnmp_container *to_delete = (netsnmp_container*)magic[1];
+ netsnmp_container *to_ignore = (netsnmp_container *) magic[2];
/*
* check for matching entry using secondary index.
@@ -234,10 +242,21 @@ _check_entry_for_updates(ipAddressTable_
rowreq_ctx->ipAddressLastChanged = netsnmp_get_agent_uptime();
/*
- * remove entry from ifcontainer
+ * Remember not to add this entry from 'ipaddress_container' to 'container' later.
+ * Simple CONTAINER_REMOVE(ipaddress_container, ..) would be slow.
*/
- CONTAINER_REMOVE(ipaddress_container, ipaddress_entry);
- netsnmp_access_ipaddress_entry_free(ipaddress_entry);
+ if (NULL == to_ignore) {
+ magic[2] = to_ignore = netsnmp_container_find("access_ipaddress:table_container");
+ if (NULL == to_ignore) {
+ snmp_log(LOG_ERR, "couldn't create ignore container\n");
+ } else {
+ /* to speed up insertion */
+ int rc;
+ CONTAINER_SET_OPTIONS(to_ignore, CONTAINER_KEY_ALLOW_DUPLICATES, rc);
+ }
+ }
+ if (NULL != to_ignore)
+ CONTAINER_INSERT(to_ignore, ipaddress_entry);
}
}
@@ -246,8 +265,11 @@ _check_entry_for_updates(ipAddressTable_
*/
static void
_add_new_entry(netsnmp_ipaddress_entry *ipaddress_entry,
- netsnmp_container *container)
+ void **magic)
{
+ netsnmp_container *container = magic[0];
+ netsnmp_container *to_ignore = magic[2];
+
ipAddressTable_rowreq_ctx *rowreq_ctx;
DEBUGMSGTL(("ipAddressTable:access", "creating new entry\n"));
@@ -255,6 +277,11 @@ _add_new_entry(netsnmp_ipaddress_entry *
netsnmp_assert(NULL != ipaddress_entry);
netsnmp_assert(NULL != container);
+ if (to_ignore && CONTAINER_FIND(to_ignore, ipaddress_entry)) {
+ /* this entry already is in 'container', skip it */
+ return;
+ }
+
/*
* allocate an row context and set the index(es)
*/
@@ -329,36 +356,44 @@ int
ipAddressTable_container_load(netsnmp_container *container)
{
netsnmp_container *ipaddress_container;
- void *tmp_ptr[2];
+ void *tmp_ptr[3];
DEBUGMSGTL(("verbose:ipAddressTable:ipAddressTable_cache_load",
"called\n"));
/*
- * TODO:351:M: |-> Load/update data in the ipAddressTable container.
+ * Load/update data in the ipAddressTable container.
* loop over your ipAddressTable data, allocate a rowreq context,
* set the index(es) [and data, optionally] and insert into
* the container.
*/
+ /*
+ * netsnmp_access_ipaddress_container_load makes sure that
+ * ipaddress_container does not contain any duplicate entries,
+ */
+
ipaddress_container =
netsnmp_access_ipaddress_container_load(NULL,
NETSNMP_ACCESS_IPADDRESS_LOAD_ADDL_IDX_BY_ADDR);
/*
* we just got a fresh copy of interface data. compare it to
* what we've already got, and make any adjustments, saving
- * missing addresses to be deleted.
+ * missing addresses to be deleted. Also, prune interfaces in
+ * ipaddress_container, so only the new interfaces remain.
*/
tmp_ptr[0] = ipaddress_container->next;
- tmp_ptr[1] = NULL;
+ tmp_ptr[1] = NULL; /* list of interfaces to be removed from 'container' */
+ tmp_ptr[2] = NULL; /* list of interfaces to be ignored in ipaddress_container */
CONTAINER_FOR_EACH(container, (netsnmp_container_obj_func *)
_check_entry_for_updates, tmp_ptr);
/*
* now add any new interfaces
*/
+ tmp_ptr[0] = container;
CONTAINER_FOR_EACH(ipaddress_container,
(netsnmp_container_obj_func *) _add_new_entry,
- container);
+ tmp_ptr);
/*
* free the container. we've either claimed each entry, or released it,
@@ -396,6 +431,19 @@ ipAddressTable_container_load(netsnmp_co
*/
CONTAINER_REMOVE(tmp_container, NULL);
}
+ CONTAINER_FREE(tmp_container);
+ }
+
+ if (NULL != tmp_ptr[2]) {
+ /* list of interfaces to be ignored in ipaddress_container - free it */
+ netsnmp_container *to_ignore = (netsnmp_container *) tmp_ptr[2];
+ netsnmp_ipaddress_entry *ipaddress_entry;
+ while (CONTAINER_SIZE(to_ignore)) {
+ ipaddress_entry = (netsnmp_ipaddress_entry*)CONTAINER_FIRST(to_ignore);
+ CONTAINER_REMOVE(to_ignore, ipaddress_entry);
+ netsnmp_access_ipaddress_entry_free(ipaddress_entry);
+ }
+ CONTAINER_FREE(to_ignore);
}
DEBUGMSGT(("verbose:ipAddressTable:ipAddressTable_cache_load",
diff -urNp old/agent/mibgroup/mibII/ipAddr.c new/agent/mibgroup/mibII/ipAddr.c
--- old/agent/mibgroup/mibII/ipAddr.c 2012-10-10 00:28:58.000000000 +0200
+++ new/agent/mibgroup/mibII/ipAddr.c 2017-04-04 13:28:56.547268946 +0200
@@ -493,14 +493,16 @@ Address_Scan_Next(Index, Retin_ifaddr)
}
#elif defined(linux)
+#include <errno.h>
static struct ifreq *ifr;
static int ifr_counter;
static void
Address_Scan_Init(void)
{
- int num_interfaces = 0;
+ int i;
int fd;
+ int lastlen = 0;
/* get info about all interfaces */
@@ -508,30 +510,45 @@ Address_Scan_Init(void)
SNMP_FREE(ifc.ifc_buf);
ifr_counter = 0;
- do
+ if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- {
- DEBUGMSGTL(("snmpd", "socket open failure in Address_Scan_Init\n"));
- return;
- }
- num_interfaces += 16;
-
- ifc.ifc_len = sizeof(struct ifreq) * num_interfaces;
- ifc.ifc_buf = (char*) realloc(ifc.ifc_buf, ifc.ifc_len);
-
- if (ioctl(fd, SIOCGIFCONF, &ifc) < 0)
- {
- ifr=NULL;
- close(fd);
- return;
- }
- close(fd);
+ DEBUGMSGTL(("snmpd", "socket open failure in Address_Scan_Init\n"));
+ return;
+ }
+
+ /*
+ * Cope with lots of interfaces and brokenness of ioctl SIOCGIFCONF
+ * on some platforms; see W. R. Stevens, ``Unix Network Programming
+ * Volume I'', p.435...
+ */
+
+ for (i = 8;; i *= 2) {
+ ifc.ifc_len = sizeof(struct ifreq) * i;
+ ifc.ifc_req = calloc(i, sizeof(struct ifreq));
+
+ if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
+ if (errno != EINVAL || lastlen != 0) {
+ /*
+ * Something has gone genuinely wrong...
+ */
+ snmp_log(LOG_ERR, "bad rc from ioctl, errno %d", errno);
+ SNMP_FREE(ifc.ifc_buf);
+ close(fd);
+ return;
+ }
+ } else {
+ if (ifc.ifc_len == lastlen) {
+ /*
+ * The length is the same as the last time; we're done...
+ */
+ break;
+ }
+ lastlen = ifc.ifc_len;
+ }
+ free(ifc.ifc_buf); /* no SNMP_FREE, getting ready to reassign */
}
- while (ifc.ifc_len >= (sizeof(struct ifreq) * num_interfaces));
-
- ifr = ifc.ifc_req;
close(fd);
+ ifr = ifc.ifc_req;
}
/*