Hi all,
I am using net-snmp 5.7.2 in my project .I want to use trap source interface
feature in my project.
I enabled clientaddr by reading some posts in our community. It’s working fine
for only Ip address interface.
It’s not working for Ipv6 address interfaces. I gone through the net-snmp code.
I observed some code is missing for Ipv6 address in snmpUDPIPv6Domain.c
I added the below code to snmpUDPIPv6Domain.c . But,I am getting bind is
failing with an error (errno 99).Am I missed anything .
Please help me to resolve this issue.
-------------------------------------------------------------------------------------------------------------
--- a/snmplib/transports/snmpUDPIPv6Domain.c 2019-09-03 15:47:53.000000000 -0700
+++ b/snmplib/transports/snmpUDPIPv6Domain.c 2019-09-18 19:11:14.817426615 -0700
@@ -196,6 +196,8 @@
int rc = 0;
char *str = NULL;
int socket_initialized = 0;
+ char *client_socket =NULL;
+ netsnmp_indexed_addr_pair addr_pair;
#ifdef NETSNMP_NO_LISTEN_SUPPORT
if (local)
@@ -206,6 +208,9 @@
return NULL;
}
+ memset(&addr_pair, 0, sizeof(netsnmp_indexed_addr_pair));
+ memcpy(&(addr_pair.remote_addr), addr, sizeof(struct sockaddr_in));
+
t = SNMP_MALLOC_TYPEDEF(netsnmp_transport);
if (t == NULL) {
return NULL;
@@ -285,6 +290,26 @@
return NULL;
#endif /* NETSNMP_NO_LISTEN_SUPPORT */
} else {
+ /* This is a client sessuon.If we've been given a
+ *client address to send frm,then bind to that .
+ Otherwise the send will use "something sesible"
+ */
+ client_socket = netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID,
+ NETSNMP_DS_LIB_CLIENT_ADDR);
+ if (client_socket) {
+ struct sockaddr_in6 client_addr;
+ netsnmp_sockaddr_in6_2(&client_addr, client_socket, NULL);
+ client_addr.sin6_port=0;
+ rc = bind(t->sock, (struct sockaddr *)&client_addr,
+ sizeof(struct sockaddr_in6));
+ if (rc!=0) {
+ DEBUGMSGTL(("netsnmp_udp6","failed to bind for clientaddr:%d %s\n",
+ errno,strerror(errno)));
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ }
+ }
/*
* This is a client session. Save the address in the
* transport-specific data pointer for later use by netsnmp_udp6_send.
-------------------------------------------------------------------------------------------------------
Thanks,
Chandra.
Get Outlook for Android<https://aka.ms/ghei36>
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