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MODBUS_SET_SOCKET(3) libmodbus Manual MODBUS_SET_SOCKET(3) NAME modbus_set_socket - set socket of the context SYNOPSIS int modbus_set_socket(modbus_t *ctx, int s); DESCRIPTION The modbus_set_socket() function shall set the socket or file descriptor in the libmodbus context. This function is useful for managing multiple client connections to the same server. RETURN VALUE The function shall return 0 if successful. Otherwise it shall return -1 and set errno. EXAMPLE ctx = modbus_new_tcp("127.0.0.1", 1502); server_socket = modbus_tcp_listen(ctx, NB_CONNECTION); FD_ZERO(&rdset); FD_SET(server_socket, &rdset); /* .... */ if (FD_ISSET(master_socket, &rdset)) { modbus_set_socket(ctx, master_socket); rc = modbus_receive(ctx, query); if (rc != -1) { modbus_reply(ctx, query, rc, mb_mapping); } } SEE ALSO modbus_get_socket(3) AUTHORS The libmodbus documentation was written by StA(C)phane Raimbault <stephane.raimbault@gmail.com> libmodbus v3.1.6 03/01/2021 MODBUS_SET_SOCKET(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | SEE ALSO | AUTHORS
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