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Rewrote the telnet server to buffer the output in a single, large buffer rather than as individual lines. This both makes output faster and makes it possible to buffer more outgoing data.

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This commit is contained in:
adamdunkels 2008-02-24 20:43:28 +00:00
parent 10692296a1
commit 814558b1fe
1 changed files with 119 additions and 155 deletions
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260
apps/telnetd/telnetd.c
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@ -28,7 +28,7 @@
* *
* This file is part of the Contiki desktop OS. * This file is part of the Contiki desktop OS.
* *
* $Id: telnetd.c,v 1.9 2008/02/09 18:51:56 oliverschmidt Exp $ * $Id: telnetd.c,v 1.10 2008/02/24 20:43:28 adamdunkels Exp $
* *
*/ */
@ -44,10 +44,7 @@
#define ISO_nl 0x0a #define ISO_nl 0x0a
#define ISO_cr 0x0d #define ISO_cr 0x0d
#define XSIZE 36 PROCESS(telnetd_process, "Telnet server");
#define YSIZE 12
PROCESS(telnetd_process, "Shell server");
AUTOSTART_PROCESSES(&telnetd_process); AUTOSTART_PROCESSES(&telnetd_process);
@ -58,16 +55,10 @@ AUTOSTART_PROCESSES(&telnetd_process);
#define TELNETD_CONF_NUMLINES 25 #define TELNETD_CONF_NUMLINES 25
#endif #endif
struct telnetd_line {
char line[TELNETD_CONF_LINELEN + 1];
};
MEMB(linemem, struct telnetd_line, TELNETD_CONF_NUMLINES);
struct telnetd_state { struct telnetd_state {
char *lines[TELNETD_CONF_NUMLINES];
char buf[TELNETD_CONF_LINELEN + 1]; char buf[TELNETD_CONF_LINELEN + 1];
char bufptr; char bufptr;
u8_t numsent; uint16_t numsent;
u8_t state; u8_t state;
#define STATE_NORMAL 0 #define STATE_NORMAL 0
#define STATE_IAC 1 #define STATE_IAC 1
@ -85,25 +76,74 @@ static struct telnetd_state s;
#define TELNET_WONT 252 #define TELNET_WONT 252
#define TELNET_DO 253 #define TELNET_DO 253
#define TELNET_DONT 254 #define TELNET_DONT 254
/*-----------------------------------------------------------------------------------*/
static char * #define DEBUG 0
alloc_line(void) #if DEBUG
{ #include <stdio.h>
return memb_alloc(&linemem); #define PRINTF(...) printf(__VA_ARGS__)
} #else
/*-----------------------------------------------------------------------------------*/ #define PRINTF(...)
#endif
struct telnetd_buf {
char bufmem[TELNETD_CONF_NUMLINES * TELNETD_CONF_LINELEN];
int ptr;
int size;
};
static struct telnetd_buf buf;
#define MIN(a, b) ((a) < (b)? (a): (b))
/*---------------------------------------------------------------------------*/
static void static void
dealloc_line(char *line) buf_init(struct telnetd_buf *buf)
{ {
memb_free(&linemem, line); buf->ptr = 0;
buf->size = TELNETD_CONF_NUMLINES * TELNETD_CONF_LINELEN;
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static int
buf_append(struct telnetd_buf *buf, const char *data, int len)
{
int copylen;
PRINTF("buf_append len %d (%d) '%.*s'\n", len, buf->ptr, len, data);
copylen = MIN(len, buf->size - buf->ptr);
memcpy(&buf->bufmem[buf->ptr], data, copylen);
buf->ptr += copylen;
return copylen;
}
/*---------------------------------------------------------------------------*/
static void
buf_copyto(struct telnetd_buf *buf, char *to, int len)
{
memcpy(to, &buf->bufmem[0], len);
}
/*---------------------------------------------------------------------------*/
static void
buf_pop(struct telnetd_buf *buf, int len)
{
int poplen;
PRINTF("buf_pop len %d (%d)\n", len, buf->ptr);
poplen = MIN(len, buf->ptr);
memcpy(&buf->bufmem[0], &buf->bufmem[poplen], buf->ptr - poplen);
buf->ptr -= poplen;
}
/*---------------------------------------------------------------------------*/
static int
buf_len(struct telnetd_buf *buf)
{
return buf->ptr;
}
/*---------------------------------------------------------------------------*/
void void
shell_quit(char *str) shell_quit(char *str)
{ {
s.state = STATE_CLOSE; s.state = STATE_CLOSE;
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
void void
telnetd_quit(void) telnetd_quit(void)
{ {
@ -113,41 +153,16 @@ telnetd_quit(void)
process_exit(&telnetd_process); process_exit(&telnetd_process);
LOADER_UNLOAD(); LOADER_UNLOAD();
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void
sendline(char *line)
{
static unsigned int i;
for(i = 0; i < TELNETD_CONF_NUMLINES; ++i) {
if(s.lines[i] == NULL) {
s.lines[i] = line;
break;
}
}
if(i == TELNETD_CONF_NUMLINES) {
dealloc_line(line);
}
}
/*-----------------------------------------------------------------------------------*/
void void
shell_prompt(char *str) shell_prompt(char *str)
{ {
char *line; buf_append(&buf, str, strlen(str));
line = alloc_line();
if(line != NULL) {
strncpy(line, str, TELNETD_CONF_LINELEN);
petsciiconv_toascii(line, TELNETD_CONF_LINELEN);
sendline(line);
}
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
void void
shell_default_output(const char *str1, int len1, const char *str2, int len2) shell_default_output(const char *str1, int len1, const char *str2, int len2)
{ {
static unsigned len;
char *line;
if(str1[len1 - 1] == '\n') { if(str1[len1 - 1] == '\n') {
--len1; --len1;
} }
@ -155,43 +170,24 @@ shell_default_output(const char *str1, int len1, const char *str2, int len2)
--len2; --len2;
} }
/* PRINTF("shell_default_output: %.*s %.*s\n", len1, str1, len2, str2);*/
#if TELNETD_CONF_GUI #if TELNETD_CONF_GUI
telnetd_gui_output(str1, len1, str2, len2); telnetd_gui_output(str1, len1, str2, len2);
#endif /* TELNETD_CONF_GUI */ #endif /* TELNETD_CONF_GUI */
line = alloc_line(); buf_append(&buf, str1, len1);
if(line != NULL) { buf_append(&buf, str2, len2);
line[TELNETD_CONF_LINELEN] = 0; buf_append(&buf, "\r\n", 2);
strncpy(line, str1, TELNETD_CONF_LINELEN);
if(len1 < TELNETD_CONF_LINELEN) {
strncpy(line + len1, str2, TELNETD_CONF_LINELEN - len1);
if(len1 + len2 < TELNETD_CONF_LINELEN) {
line[len1 + len2] = 0;
}
}
len = (unsigned int)strlen(line);
if(len < TELNETD_CONF_LINELEN - 2) {
line[len] = ISO_cr;
line[len+1] = ISO_nl;
line[len+2] = 0;
}
petsciiconv_toascii(line, TELNETD_CONF_LINELEN);
sendline(line);
}
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
PROCESS_THREAD(telnetd_process, ev, data) PROCESS_THREAD(telnetd_process, ev, data)
{ {
PROCESS_BEGIN(); PROCESS_BEGIN();
tcp_listen(HTONS(23)); tcp_listen(HTONS(23));
memb_init(&linemem); buf_init(&buf);
shell_init(); shell_init();
shell_file_init();
shell_ps_init();
shell_run_init();
shell_text_init();
shell_time_init();
#if TELNETD_CONF_GUI #if TELNETD_CONF_GUI
telnetd_gui_init(); telnetd_gui_init();
@ -212,106 +208,80 @@ PROCESS_THREAD(telnetd_process, ev, data)
PROCESS_END(); PROCESS_END();
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
acked(void) acked(void)
{ {
static unsigned int i; buf_pop(&buf, s.numsent);
while(s.numsent > 0) {
dealloc_line(s.lines[0]);
for(i = 1; i < TELNETD_CONF_NUMLINES; ++i) {
s.lines[i - 1] = s.lines[i];
}
s.lines[TELNETD_CONF_NUMLINES - 1] = NULL;
--s.numsent;
}
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
senddata(void) senddata(void)
{ {
static char *bufptr, *lineptr; int len;
static int buflen, linelen; len = MIN(buf_len(&buf), uip_mss());
PRINTF("senddata len %d\n", len);
bufptr = uip_appdata; buf_copyto(&buf, uip_appdata, len);
buflen = 0; uip_send(uip_appdata, len);
for(s.numsent = 0; s.numsent < TELNETD_CONF_NUMLINES && s.numsent = len;
s.lines[s.numsent] != NULL ; ++s.numsent) {
lineptr = s.lines[s.numsent];
linelen = (int)strlen(lineptr);
if(linelen > TELNETD_CONF_LINELEN) {
linelen = TELNETD_CONF_LINELEN;
}
if(buflen + linelen < uip_mss()) {
memcpy(bufptr, lineptr, linelen);
bufptr += linelen;
buflen += linelen;
} else {
break;
}
}
uip_send(uip_appdata, buflen);
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
closed(void) closed(void)
{ {
static unsigned int i;
for(i = 0; i < TELNETD_CONF_NUMLINES; ++i) {
if(s.lines[i] != NULL) {
dealloc_line(s.lines[i]);
}
}
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
get_char(u8_t c) get_char(u8_t c)
{ {
if(c == ISO_cr) { PRINTF("telnetd: get_char '%c' %d %d\n", c, c, s.bufptr);
if(c == 0) {
return; return;
} }
if(c != ISO_nl && c != ISO_cr) {
s.buf[(int)s.bufptr] = c; s.buf[(int)s.bufptr] = c;
if(s.buf[(int)s.bufptr] == ISO_nl ||
s.bufptr == sizeof(s.buf) - 1) {
if(s.bufptr > 0) {
s.buf[(int)s.bufptr] = 0;
petsciiconv_topetscii(s.buf, TELNETD_CONF_LINELEN);
}
shell_input(s.buf, s.bufptr);
s.bufptr = 0;
} else {
++s.bufptr; ++s.bufptr;
} }
if(((c == ISO_nl || c == ISO_cr) && s.bufptr > 0) ||
s.bufptr == sizeof(s.buf)) {
if(s.bufptr < sizeof(s.buf)) {
s.buf[(int)s.bufptr] = 0;
}
petsciiconv_topetscii(s.buf, TELNETD_CONF_LINELEN);
PRINTF("telnetd: get_char '%.*s'\n", s.bufptr, s.buf);
shell_input(s.buf, s.bufptr);
s.bufptr = 0;
}
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
sendopt(u8_t option, u8_t value) sendopt(u8_t option, u8_t value)
{ {
char *line; char line[4];
line = alloc_line();
if(line != NULL) {
line[0] = (char)TELNET_IAC; line[0] = (char)TELNET_IAC;
line[1] = option; line[1] = option;
line[2] = value; line[2] = value;
line[3] = 0; line[3] = 0;
sendline(line); buf_append(&buf, line, 4);
}
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
newdata(void) newdata(void)
{ {
u16_t len; u16_t len;
u8_t c; u8_t c;
uint8_t *ptr;
len = uip_datalen(); len = uip_datalen();
PRINTF("newdata len %d '%.*s'\n", len, len, (char *)uip_appdata);
ptr = uip_appdata;
while(len > 0 && s.bufptr < sizeof(s.buf)) { while(len > 0 && s.bufptr < sizeof(s.buf)) {
c = *(char *)uip_appdata; c = *ptr;
uip_appdata = (char *)uip_appdata + 1; PRINTF("newdata char '%c' %d %d state %d\n", c, c, len, s.state);
++ptr;
--len; --len;
switch(s.state) { switch(s.state) {
case STATE_IAC: case STATE_IAC:
@ -369,18 +339,16 @@ newdata(void)
} }
} }
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
void void
telnetd_appcall(void *ts) telnetd_appcall(void *ts)
{ {
static unsigned int i;
if(uip_connected()) { if(uip_connected()) {
tcp_markconn(uip_conn, &s); tcp_markconn(uip_conn, &s);
for(i = 0; i < TELNETD_CONF_NUMLINES; ++i) { buf_init(&buf);
s.lines[i] = NULL;
}
s.bufptr = 0; s.bufptr = 0;
s.state = STATE_NORMAL; s.state = STATE_NORMAL;
shell_start();
} }
if(s.state == STATE_CLOSE) { if(s.state == STATE_CLOSE) {
@ -388,21 +356,17 @@ telnetd_appcall(void *ts)
uip_close(); uip_close();
return; return;
} }
if(uip_closed() || if(uip_closed() ||
uip_aborted() || uip_aborted() ||
uip_timedout()) { uip_timedout()) {
closed(); closed();
} }
if(uip_acked()) { if(uip_acked()) {
acked(); acked();
} }
if(uip_newdata()) { if(uip_newdata()) {
newdata(); newdata();
} }
if(uip_rexmit() || if(uip_rexmit() ||
uip_newdata() || uip_newdata() ||
uip_acked() || uip_acked() ||
@ -411,4 +375,4 @@ telnetd_appcall(void *ts)
senddata(); senddata();
} }
} }
/*-----------------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/