FreeCalypso > hg > freecalypso-tools
view rvinterf/asyncshell/rxctl.c @ 407:19e5a3e2f9c0
fcup-settime: moved time() retrieval a little closer to the output
A fundamental problem with all simple time transfer tools is that there is
always some delay between the time retrieval on the source system and that
transmitted time being set on the destination, and the resulting time
on the destination system is off by that delay amount. This delay cannot
be fully eliminated when working in a simple environment like ours,
but we should make our best effort to minimize it. In the present case,
moving the atinterf_init() call before the time() retrieval should make
a teensy-tiny improvement.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 11 Aug 2018 21:52:17 +0000 |
| parents | e7502631a0f9 |
| children |
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/* * This module contains the code for enabling and disabling the receiving * of various packet types via rvinterf. */ #include <sys/types.h> #include <stdio.h> #include <ctype.h> #include <string.h> #include <strings.h> #include <stdlib.h> #include "pktmux.h" #include "localsock.h" void send_rxctl_cmd(channel, enable) { u_char cmdbuf[2]; cmdbuf[0] = enable ? CLI2RVI_WANT_MUXPROTO : CLI2RVI_DROP_MUXPROTO; cmdbuf[1] = channel; send_init_command(cmdbuf, 2); } void ati_rx_control(newstate) { static int state = 0; if (state == newstate) return; send_rxctl_cmd(RVT_AT_HEADER, newstate); state = newstate; } void gpf_rx_control(newstate) { static int state = 0; if (state == newstate) return; send_rxctl_cmd(RVT_L23_HEADER, newstate); state = newstate; } void tch_rx_control(newstate) { static int state = 0; if (state == newstate) return; send_rxctl_cmd(RVT_TCH_HEADER, newstate); state = newstate; } void rxctl_user_cmd(args, enable) char *args; { char *cp, *np; int gotsome = 0; for (cp = args; ; ) { while (isspace(*cp)) cp++; if (!*cp) { if (!gotsome) printf("error: argument required\n"); return; } for (np = cp; *cp && !isspace(*cp); cp++) ; if (*cp) *cp++ = '\0'; if (!strcmp(np, "ati")) ati_rx_control(enable); else if (!strcmp(np, "gpf")) gpf_rx_control(enable); else if (!strcmp(np, "tch")) tch_rx_control(enable); else { printf("error: unknown channel \"%s\"\n", np); return; } gotsome++; } } void cmd_enable(args) char *args; { rxctl_user_cmd(args, 1); } void cmd_disable(args) char *args; { rxctl_user_cmd(args, 0); }
