FreeCalypso > hg > freecalypso-tools
view rvinterf/l1filter/rvif_rx.c @ 860:7d4f080f66db
fc-add-ramps: actually produce correct output
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 18 Dec 2021 21:17:33 +0000 |
parents | ea458ee48691 |
children |
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/* * This module implements message Rx from rvinterf. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "localsock.h" #include "exitcodes.h" extern int sock; u_char rvi_msg[LOCALSOCK_MAX_MSG]; int rvi_msg_len; static int rx_state, rx_left; static u_char *rx_ptr; void localsock_prep_for_length_rx() { rx_state = 0; rx_ptr = rvi_msg; rx_left = 2; } static void prep_for_message_rx() { rx_state = 1; rx_ptr = rvi_msg; rx_left = rvi_msg_len; } void process_msg_from_rvinterf() { switch (rvi_msg[0]) { case RVI2CLI_PKT_FROM_TARGET: process_pkt_from_target(); return; case RVI2CLI_LOCAL_CMD_RESP: if (rvi_msg_len < 2) goto bad; if (rvi_msg[1] == '+') return; fprintf(stderr, "Error from rvinterf: %.*s\n", rvi_msg_len - 1, rvi_msg + 1); exit(ERROR_RVINTERF); default: bad: fprintf(stderr, "Error: unexpected message type %02X from rvinterf\n", rvi_msg[0]); exit(ERROR_RVINTERF); } } void handle_rvinterf_input() { int cc; cc = read(sock, rx_ptr, rx_left); if (cc <= 0) { perror("read from rvinterf socket"); exit(ERROR_RVINTERF); } rx_ptr += cc; rx_left -= cc; if (rx_left) return; /* got the thing, process it */ if (rx_state) { process_msg_from_rvinterf(); localsock_prep_for_length_rx(); } else { rvi_msg_len = rvi_msg[0] << 8 | rvi_msg[1]; if (rvi_msg_len < 1 || rvi_msg_len > LOCALSOCK_MAX_MSG) { fprintf(stderr, "Invalid length from rvinterf: %02X%02X\n", rvi_msg[0], rvi_msg[1]); exit(ERROR_RVINTERF); } prep_for_message_rx(); } }