晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* hdlcdrv.h -- HDLC packet radio network driver.
* The Linux soundcard driver for 1200 baud and 9600 baud packet radio
* (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
*/
#ifndef _HDLCDRV_H
#define _HDLCDRV_H
/* -------------------------------------------------------------------- */
/*
* structs for the IOCTL commands
*/
struct hdlcdrv_params {
int iobase;
int irq;
int dma;
int dma2;
int seriobase;
int pariobase;
int midiiobase;
};
struct hdlcdrv_channel_params {
int tx_delay; /* the transmitter keyup delay in 10ms units */
int tx_tail; /* the transmitter keyoff delay in 10ms units */
int slottime; /* the slottime in 10ms; usually 10 = 100ms */
int ppersist; /* the p-persistence 0..255 */
int fulldup; /* some driver do not support full duplex, setting */
/* this just makes them send even if DCD is on */
};
struct hdlcdrv_old_channel_state {
int ptt;
int dcd;
int ptt_keyed;
};
struct hdlcdrv_channel_state {
int ptt;
int dcd;
int ptt_keyed;
unsigned long tx_packets;
unsigned long tx_errors;
unsigned long rx_packets;
unsigned long rx_errors;
};
struct hdlcdrv_ioctl {
int cmd;
union {
struct hdlcdrv_params mp;
struct hdlcdrv_channel_params cp;
struct hdlcdrv_channel_state cs;
struct hdlcdrv_old_channel_state ocs;
unsigned int calibrate;
unsigned char bits;
char modename[128];
char drivername[32];
} data;
};
/* -------------------------------------------------------------------- */
/*
* ioctl values
*/
#define HDLCDRVCTL_GETMODEMPAR 0
#define HDLCDRVCTL_SETMODEMPAR 1
#define HDLCDRVCTL_MODEMPARMASK 2 /* not handled by hdlcdrv */
#define HDLCDRVCTL_GETCHANNELPAR 10
#define HDLCDRVCTL_SETCHANNELPAR 11
#define HDLCDRVCTL_OLDGETSTAT 20
#define HDLCDRVCTL_CALIBRATE 21
#define HDLCDRVCTL_GETSTAT 22
/*
* these are mainly for debugging purposes
*/
#define HDLCDRVCTL_GETSAMPLES 30
#define HDLCDRVCTL_GETBITS 31
/*
* not handled by hdlcdrv, but by its depending drivers
*/
#define HDLCDRVCTL_GETMODE 40
#define HDLCDRVCTL_SETMODE 41
#define HDLCDRVCTL_MODELIST 42
#define HDLCDRVCTL_DRIVERNAME 43
/*
* mask of needed modem parameters, returned by HDLCDRVCTL_MODEMPARMASK
*/
#define HDLCDRV_PARMASK_IOBASE (1<<0)
#define HDLCDRV_PARMASK_IRQ (1<<1)
#define HDLCDRV_PARMASK_DMA (1<<2)
#define HDLCDRV_PARMASK_DMA2 (1<<3)
#define HDLCDRV_PARMASK_SERIOBASE (1<<4)
#define HDLCDRV_PARMASK_PARIOBASE (1<<5)
#define HDLCDRV_PARMASK_MIDIIOBASE (1<<6)
/* -------------------------------------------------------------------- */
/* -------------------------------------------------------------------- */
#endif /* _HDLCDRV_H */
/* -------------------------------------------------------------------- */