diff --git a/apps/snmp/snmp_main.c b/apps/snmp/snmp_main.c index e823ac87..193e1ddc 100644 --- a/apps/snmp/snmp_main.c +++ b/apps/snmp/snmp_main.c @@ -73,6 +73,140 @@ static oid my_data_ulong_instance[4] = { 1, 2, 3, 9 }; u_long my_ulong = 42; +static netsnmp_table_data_set *table_set; + +/* + * https://net-snmp.sourceforge.io/dev/agent/data_set_8c-example.html#_a0 + */ +void +init_testtable(void) +{ + netsnmp_table_row *row; + + /* + * the OID we want to register our integer at. This should be the + * * OID node for the entire table. In our case this is the + * * netSnmpIETFWGTable oid definition + */ + oid my_registration_oid[] = + { 1, 3, 6, 1, 4, 1, 8072, 2, 2, 1 }; + + /* + * a debugging statement. Run the agent with -Dexample_data_set to see + * * the output of this debugging statement. + */ + DEBUGMSGTL(("example_data_set", + "Initalizing example dataset table\n")); + + /* + * It's going to be the "working group chairs" table, since I'm + * * sitting at an IETF convention while I'm writing this. + * * + * * column 1 = index = string = WG name + * * column 2 = string = chair #1 + * * column 3 = string = chair #2 (most WGs have 2 chairs now) + */ + + table_set = netsnmp_create_table_data_set("netSnmpIETFWGTable"); + + /* + * allow the creation of new rows via SNMP SETs + */ + table_set->allow_creation = 1; + + /* + * set up what a row "should" look like, starting with the index + */ + netsnmp_table_dataset_add_index(table_set, ASN_OCTET_STR); + + /* + * define what the columns should look like. both are octet strings here + */ + netsnmp_table_set_multi_add_default_row(table_set, + /* + * column 2 = OCTET STRING, + * writable = 1, + * default value = NULL, + * default value len = 0 + */ + 2, ASN_OCTET_STR, 1, NULL, 0, + /* + * similar + */ + 3, ASN_OCTET_STR, 1, NULL, 0, + 0 /* done */ ); + + /* + * register the table + */ + /* + * if we wanted to handle specific data in a specific way, or note + * * when requests came in we could change the NULL below to a valid + * * handler method in which we could over ride the default + * * behaviour of the table_dataset helper + */ + netsnmp_register_table_data_set(netsnmp_create_handler_registration + ("netSnmpIETFWGTable", NULL, + my_registration_oid, + OID_LENGTH(my_registration_oid), + HANDLER_CAN_RWRITE), table_set, NULL); + + + /* + * create the a row for the table, and add the data + */ + row = netsnmp_create_table_data_row(); + /* + * set the index to the IETF WG name "snmpv3" + */ + netsnmp_table_row_add_index(row, ASN_OCTET_STR, "snmpv3", + strlen("snmpv3")); + + + /* + * set column 2 to be the WG chair name "Russ Mundy" + */ + netsnmp_set_row_column(row, 2, ASN_OCTET_STR, + "Russ Mundy", strlen("Russ Mundy")); + netsnmp_mark_row_column_writable(row, 2, 1); /* make writable via SETs */ + + /* + * set column 3 to be the WG chair name "David Harrington" + */ + netsnmp_set_row_column(row, 3, ASN_OCTET_STR, "David Harrington", + strlen("David Harrington")); + netsnmp_mark_row_column_writable(row, 3, 1); /* make writable via SETs */ + + /* + * add the row to the table + */ + netsnmp_table_dataset_add_row(table_set, row); + + /* + * add the data, for the second row + */ + row = netsnmp_create_table_data_row(); + netsnmp_table_row_add_index(row, ASN_OCTET_STR, "snmpconf", + strlen("snmpconf")); + netsnmp_set_row_column(row, 2, ASN_OCTET_STR, "David Partain", + strlen("David Partain")); + netsnmp_mark_row_column_writable(row, 2, 1); /* make writable */ + netsnmp_set_row_column(row, 3, ASN_OCTET_STR, "Jon Saperia", + strlen("Jon Saperia")); + netsnmp_mark_row_column_writable(row, 3, 1); /* make writable */ + netsnmp_table_dataset_add_row(table_set, row); + + /* + * Finally, this actually allows the "add_row" token it the + * * snmpd.conf file to add rows to this table. + * * Example snmpd.conf line: + * * add_row netSnmpIETFWGTable eos "Glenn Waters" "Dale Francisco" + */ + netsnmp_register_auto_data_table(table_set, NULL); + + DEBUGMSGTL(("example_data_set", "Done initializing.\n")); +} + void init_testhandler(void) { @@ -568,10 +702,11 @@ clixon_snmp_init(clicon_handle h, /* initialize the agent library */ init_agent(__PROGRAM__); - + /* XXX Hardcoded, replace this with generic MIB */ #if 1 init_testhandler(); + init_testtable(); #else init_nstAgentSubagentObject(h); #endif