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https://github.com/lwip-tcpip/lwip.git
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SNMP MIB2: Implement tcpConnectionTable
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@ -247,6 +247,18 @@ static const struct snmp_table_simple_col_def tcp_ConnTable_columns[] = {
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static const struct snmp_table_simple_node tcp_ConnTable = SNMP_TABLE_CREATE_SIMPLE(13, tcp_ConnTable_columns, tcp_ConnTable_get_cell_value, tcp_ConnTable_get_next_cell_instance_and_value);
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static const struct snmp_table_simple_node tcp_ConnTable = SNMP_TABLE_CREATE_SIMPLE(13, tcp_ConnTable_columns, tcp_ConnTable_get_cell_value, tcp_ConnTable_get_next_cell_instance_and_value);
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#endif /* LWIP_IPV4 */
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#endif /* LWIP_IPV4 */
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static snmp_err_t tcp_ConnectionTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len);
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static snmp_err_t tcp_ConnectionTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len);
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static const struct snmp_table_simple_col_def tcp_ConnectionTable_columns[] = {
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/* all items except tcpConnectionState and tcpConnectionProcess are declared as not-accessible */
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{ 7, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* tcpConnectionState */
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{ 8, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* tcpConnectionProcess */
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};
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static const struct snmp_table_simple_node tcp_ConnectionTable = SNMP_TABLE_CREATE_SIMPLE(19, tcp_ConnectionTable_columns, tcp_ConnectionTable_get_cell_value, tcp_ConnectionTable_get_next_cell_instance_and_value);
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static snmp_err_t tcp_ListenerTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len);
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static snmp_err_t tcp_ListenerTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len);
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static snmp_err_t tcp_ListenerTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len);
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static snmp_err_t tcp_ListenerTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len);
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@ -277,6 +289,7 @@ CREATE_LWIP_SYNC_NODE(14, tcp_InErrs)
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CREATE_LWIP_SYNC_NODE(15, tcp_OutRsts)
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CREATE_LWIP_SYNC_NODE(15, tcp_OutRsts)
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CREATE_LWIP_SYNC_NODE(17, tcp_HCInSegs)
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CREATE_LWIP_SYNC_NODE(17, tcp_HCInSegs)
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CREATE_LWIP_SYNC_NODE(18, tcp_HCOutSegs)
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CREATE_LWIP_SYNC_NODE(18, tcp_HCOutSegs)
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CREATE_LWIP_SYNC_NODE(19, tcp_ConnectionTable)
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CREATE_LWIP_SYNC_NODE(20, tcp_ListenerTable)
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CREATE_LWIP_SYNC_NODE(20, tcp_ListenerTable)
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static const struct snmp_node* tcp_nodes[] = {
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static const struct snmp_node* tcp_nodes[] = {
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@ -299,6 +312,7 @@ static const struct snmp_node* tcp_nodes[] = {
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&SYNC_NODE_NAME(tcp_OutRsts).node.node,
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&SYNC_NODE_NAME(tcp_OutRsts).node.node,
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&SYNC_NODE_NAME(tcp_HCInSegs).node.node,
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&SYNC_NODE_NAME(tcp_HCInSegs).node.node,
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&SYNC_NODE_NAME(tcp_HCOutSegs).node.node,
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&SYNC_NODE_NAME(tcp_HCOutSegs).node.node,
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&SYNC_NODE_NAME(tcp_ConnectionTable).node.node,
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&SYNC_NODE_NAME(tcp_ListenerTable).node.node
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&SYNC_NODE_NAME(tcp_ListenerTable).node.node
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};
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};
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@ -2033,6 +2047,141 @@ tcp_ConnTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_
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#endif /* LWIP_IPV4 */
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#endif /* LWIP_IPV4 */
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/* --- tcpConnectionTable --- */
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static snmp_err_t
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tcp_ConnectionTable_get_cell_value_core(const u32_t* column, struct tcp_pcb *pcb, union snmp_variant_value* value)
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{
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/* all items except tcpConnectionStatea and tcpListenerProcess are declared as not-accessible */
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switch (*column) {
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case 7: /* tcpConnectionState */
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value->u32 = pcb->state + 1;
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break;
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case 8: /* tcpListenerProcess */
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value->u32 = 0; /* not supported */
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break;
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default:
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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return SNMP_ERR_NOERROR;
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}
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static snmp_err_t
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tcp_ConnectionTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len)
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{
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ip_addr_t local_ip, remote_ip;
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u16_t local_port, remote_port;
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struct tcp_pcb *pcb;
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u8_t index = 0;
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u8_t i;
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struct tcp_pcb ** const tcp_pcb_nonlisten_lists[] = {&tcp_bound_pcbs, &tcp_active_pcbs, &tcp_tw_pcbs};
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LWIP_UNUSED_ARG(value_len);
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/* tcpConnectionLocalAddressType + tcpConnectionLocalAddress */
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index += snmp_oid_to_ip(&row_oid[index], row_oid_len-index, &local_ip);
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if(index == 0) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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/* tcpConnectionLocalPort */
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if(row_oid_len < (index+1)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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if(row_oid[index] > 0xffff) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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local_port = (u16_t)row_oid[index];
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index++;
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/* tcpConnectionRemAddressType + tcpConnectionRemAddress */
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index += snmp_oid_to_ip(&row_oid[index], row_oid_len-index, &remote_ip);
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if(index == 0) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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/* tcpConnectionRemPort */
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if(row_oid_len < (index+1)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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if(row_oid[index] > 0xffff) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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remote_port = (u16_t)row_oid[index];
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/* find tcp_pcb with requested ip and port*/
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for(i=0; i<LWIP_ARRAYSIZE(tcp_pcb_nonlisten_lists); i++) {
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pcb = *tcp_pcb_nonlisten_lists[i];
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while (pcb != NULL) {
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if(ip_addr_cmp(&local_ip, &pcb->local_ip) &&
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(local_port == pcb->local_port) &&
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ip_addr_cmp(&remote_ip, &pcb->remote_ip) &&
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(remote_port == pcb->remote_port)) {
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/* fill in object properties */
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return tcp_ConnectionTable_get_cell_value_core(column, pcb, value);
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}
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pcb = pcb->next;
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}
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}
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/* not found */
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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static snmp_err_t
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tcp_ConnectionTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len)
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{
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struct tcp_pcb *pcb;
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struct snmp_next_oid_state state;
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/* 1x tcpConnectionLocalAddressType + 16x tcpConnectionLocalAddress + 1x tcpConnectionLocalPort
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* 1x tcpConnectionRemAddressType + 16x tcpConnectionRemAddress + 1x tcpConnectionRemPort */
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u32_t result_temp[36];
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u8_t i;
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struct tcp_pcb ** const tcp_pcb_nonlisten_lists[] = {&tcp_bound_pcbs, &tcp_active_pcbs, &tcp_tw_pcbs};
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LWIP_UNUSED_ARG(value_len);
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/* init struct to search next oid */
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snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(result_temp));
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/* iterate over all possible OIDs to find the next one */
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for(i=0; i<LWIP_ARRAYSIZE(tcp_pcb_nonlisten_lists); i++) {
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pcb = *tcp_pcb_nonlisten_lists[i];
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while (pcb != NULL) {
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u8_t index = 0;
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u32_t test_oid[LWIP_ARRAYSIZE(result_temp)];
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/* tcpConnectionLocalAddressType + tcpConnectionLocalAddress */
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index += snmp_ip_to_oid(&pcb->local_ip, &test_oid[index]);
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test_oid[index] = pcb->local_port; /* tcpConnectionLocalPort */
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index++;
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/* tcpConnectionRemAddressType + tcpConnectionRemAddress */
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index += snmp_ip_to_oid(&pcb->remote_ip, &test_oid[index]);
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test_oid[index] = pcb->remote_port; /* tcpConnectionRemPort */
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index++;
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/* check generated OID: is it a candidate for the next one? */
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snmp_next_oid_check(&state, test_oid, index, pcb);
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pcb = pcb->next;
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}
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}
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/* did we find a next one? */
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if(state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
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snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
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/* fill in object properties */
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return tcp_ConnectionTable_get_cell_value_core(column, (struct tcp_pcb*)state.reference, value);
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} else {
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/* not found */
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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}
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/* --- tcpListenerTable --- */
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/* --- tcpListenerTable --- */
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static snmp_err_t
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static snmp_err_t
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@ -2056,7 +2205,7 @@ tcp_ListenerTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t
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ip_addr_t local_ip;
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ip_addr_t local_ip;
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u16_t local_port;
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u16_t local_port;
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struct tcp_pcb_listen *pcb;
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struct tcp_pcb_listen *pcb;
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int index = 0;
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u8_t index = 0;
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LWIP_UNUSED_ARG(value_len);
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LWIP_UNUSED_ARG(value_len);
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