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fix(simulator): modbus write single coil

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This commit is contained in:
fengzero
2022-07-19 02:29:47 +00:00
parent e9d0052791
commit fd2f72ca43
1 changed files with 15 additions and 8 deletions
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simulator/modbus_s.c
+15 -8
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@@ -85,27 +85,34 @@ ssize_t modbus_s_rtu_req(uint8_t *req, uint16_t req_len, uint8_t *res,
return -1;
}
if (code->function == MODBUS_READ_COIL ||
code->function == MODBUS_READ_INPUT ||
code->function == MODBUS_READ_HOLD_REG ||
code->function == MODBUS_READ_INPUT_REG) {
switch (code->function) {
case MODBUS_READ_COIL:
case MODBUS_READ_INPUT:
case MODBUS_READ_HOLD_REG:
case MODBUS_READ_INPUT_REG:
if (req_len <
sizeof(struct modbus_code) + sizeof(struct modbus_address) + 2) {
return 0;
}
use_len += 2;
} else {
if (req_len < sizeof(struct modbus_code) +
sizeof(struct modbus_address) + sizeof(struct modbus_data)) {
break;
case MODBUS_WRITE_S_COIL:
case MODBUS_WRITE_S_HOLD_REG:
if (req_len <
sizeof(struct modbus_code) + sizeof(struct modbus_address) + 2) {
return 0;
}
use_len += 2;
break;
case MODBUS_WRITE_M_HOLD_REG:
case MODBUS_WRITE_M_COIL:
if (req_len < sizeof(struct modbus_code) +
sizeof(struct modbus_address) + sizeof(struct modbus_data) +
data->n_byte + 2) {
return 0;
}
use_len += sizeof(struct modbus_data) + data->n_byte + 2;
break;
}
memcpy(res, req, sizeof(struct modbus_code));