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feat: capture complete DOS command diagnostics

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coolguy
2026-08-16 16:48:47 +09:00
parent 5d9cd90299
commit dc2285b4d4
3 changed files with 113 additions and 21 deletions
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tools/tcpagent/README.md
+10 -3
View File
@@ -22,8 +22,12 @@ therefore distributed under GPLv3 when linked with mTCP.
## Protocol
`PING`, `READ`, `WRITE`, `LIST`, and `EXEC` use text commands. Fast transfer
commands are:
`PING`, `READ`, `WRITE`, and `LIST` use text commands. `EXEC` captures both
stdout and stderr at the DOS handle level and returns an untruncated raw body:
- `EXEC <hex command>\n` -> `RESULT <exit> <length> <flags>\r\n<raw bytes>`
Fast transfer commands are:
- `PUT <hex DOS path> <byte length>\n<raw bytes>` -> `OK\r\n`
- `GET <hex DOS path>\n` -> `DATA <length>\r\n<raw bytes>`
@@ -36,4 +40,7 @@ uv run ferro-vm put host-file 'C:\DOS\FILE'
uv run ferro-vm get 'C:\DOS\FILE' host-file
```
No DOS-side change is required for the Python host automation.
The foreground agent shows timestamped connection, transfer, and command
start/finish lines. It also keeps the same metadata in `C:\TCPAGENT.LOG`,
rotating files larger than 256 KiB to `C:\TCPAGENT.OLD`. Payloads and command
output are never written to that metadata log.
tools/tcpagent/tcpagent.cpp
+68 -12
View File
@@ -1,10 +1,13 @@
#include <bios.h>
#include <conio.h>
#include <dos.h>
#include <fcntl.h>
#include <io.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "types.h"
#include "trace.h"
@@ -27,6 +30,35 @@ static TcpSocket *socketp;
static volatile uint8_t stop_requested;
static FILE *put_file;
static unsigned long put_remaining;
static unsigned long put_started;
static char put_path[260];
static unsigned long ticks(void) {
long value=0;
_bios_timeofday(_TIME_GETCLOCK,&value);
return (unsigned long)value;
}
static void elapsed_text(unsigned long started,char *out) {
unsigned long now=ticks(),delta=now>=started?now-started:now+(1573040UL-started);
sprintf(out,"%lu.%02lus",delta/18UL,(delta%18UL)*100UL/18UL);
}
static void log_line(int attr,const char *fmt,...) {
struct dostime_t now; va_list ap; char text[760];
_dos_gettime(&now); va_start(ap,fmt); vsprintf(text,fmt,ap); va_end(ap);
/* Open Watcom's DOS conio has no textattr(), and ANSI escapes are not
interpreted on the installed FreeDOS console. Keep output clean. */
(void)attr;
cprintf("%02u:%02u:%02u %s\r\n",now.hour,now.minute,now.second,text);
{ FILE *f=fopen("C:\\TCPAGENT.LOG","a");
if(f){fprintf(f,"%02u:%02u:%02u %s\n",now.hour,now.minute,now.second,text);fclose(f);} }
}
static void init_log(void) {
FILE *f=fopen("C:\\TCPAGENT.LOG","rb"); long size=0;
if(f){fseek(f,0,SEEK_END);size=ftell(f);fclose(f);}
if(size>262144L){remove("C:\\TCPAGENT.OLD");rename("C:\\TCPAGENT.LOG","C:\\TCPAGENT.OLD");}
f=fopen("C:\\TCPAGENT.LOG","a");
if(f){fputs("--- TCPAGENT start ---\n",f);fclose(f);}
}
void __interrupt __far ctrl_break(void) { stop_requested=1; }
void __interrupt __far ctrl_c(void) { stop_requested=1; }
@@ -110,10 +142,11 @@ static void command_put(char *args) {
if(!length_text){error_text("PUT requires path and length");return;}
*length_text++='\0';
if(!decode_path(args,path,sizeof(path))){error_text("Invalid path encoding");return;}
put_remaining=strtoul(length_text,0,10);
put_remaining=strtoul(length_text,0,10); strcpy(put_path,path); put_started=ticks();
log_line(0x0B,"> PUT %s %luB",path,put_remaining);
put_file=fopen(path,"wb");
if(!put_file){put_remaining=0;error_text("Cannot write file");return;}
if(!put_remaining){fclose(put_file);put_file=0;ok_data((const unsigned char *)"",0);}
if(!put_file){put_remaining=0;log_line(0x0C,"< PUT ERR cannot open");error_text("Cannot write file");return;}
if(!put_remaining){char elapsed[24];fclose(put_file);put_file=0;elapsed_text(put_started,elapsed);log_line(0x0A,"< PUT OK %s",elapsed);ok_data((const unsigned char *)"",0);}
}
static void command_get(char *args) {
char path[260]; FILE *f; long length; size_t count;
@@ -144,11 +177,28 @@ static void command_list(char *args) {
ok_data((unsigned char *)output,used);
}
static void command_exec(char *args) {
char command[700],shell[800]; const char *tmp="C:\\PIEXEC.TMP"; FILE *f; int n,code; size_t count;
char command[700],elapsed[24]; const char *tmp="C:\\PIEXEC.TMP"; FILE *f;
int n,code=-1,fd=-1,save1=-1,save2=-1; long length=0; size_t count; unsigned long started;
n=decode_hex(args,(unsigned char *)command,sizeof(command)-1); if(n<0){error_text("Invalid command encoding");return;} command[n]='\0';
sprintf(shell,"COMMAND.COM /C %s > %s",command,tmp); code=system(shell);
f=fopen(tmp,"rb"); count=f?fread(data,1,CHUNK_SIZE,f):0; if(f)fclose(f); remove(tmp);
sprintf(linebuf,"OK %d ",code); write_text(linebuf); write_hex(data,count); write_text("\r\n");
started=ticks(); log_line(0x0E,"> EXEC %.640s",command);
fflush(stdout); fflush(stderr);
save1=dup(1); save2=dup(2);
fd=open(tmp,O_CREAT|O_TRUNC|O_WRONLY|O_BINARY,S_IREAD|S_IWRITE);
if(save1<0||save2<0||fd<0||dup2(fd,1)<0||dup2(fd,2)<0) {
if(fd>=0)close(fd);
if(save1>=0){dup2(save1,1);close(save1);}
if(save2>=0){dup2(save2,2);close(save2);}
log_line(0x0C,"< EXEC ERR redirect failed"); error_text("Cannot capture command output"); return;
}
close(fd); code=system(command); fflush(stdout); fflush(stderr);
dup2(save1,1); dup2(save2,2); close(save1); close(save2);
f=fopen(tmp,"rb");
if(f){fseek(f,0,SEEK_END);length=ftell(f);fseek(f,0,SEEK_SET);}
elapsed_text(started,elapsed);
log_line(code?0x0C:0x0A,"< EXEC exit=%d %ldB %s",code,length,elapsed);
sprintf(linebuf,"RESULT %d %ld 0\r\n",code,length); write_text(linebuf);
while(f&&(count=fread(data,1,CHUNK_SIZE,f))>0)if(send_all(data,count)<0)break;
if(f)fclose(f); remove(tmp);
}
static void process_line(char *line) {
char *cmd=line,*args=strchr(line,' '); if(args)*args++='\0';else args=cmd+strlen(cmd);
@@ -173,11 +223,15 @@ static int connect_host(void) {
return 0;
}
int main(void) {
int used,rc; uint16_t key;
if(Utils::parseEnv()!=0)return 2;
if(Utils::initStack(1,TCP_SOCKET_RING_SIZE,ctrl_break,ctrl_c))return 3;
int used,rc; uint16_t key; unsigned attempts=0;
init_log();
log_line(0x0B,"* TCPAGENT starting; Alt-X returns to DOS");
if(Utils::parseEnv()!=0){log_line(0x0C,"* MTCP configuration error");return 2;}
if(Utils::initStack(1,TCP_SOCKET_RING_SIZE,ctrl_break,ctrl_c)){log_line(0x0C,"* TCP stack initialization error");return 3;}
while(!stop_requested) {
if(connect_host()!=0){unsigned long spins=0;while(spins++<60000UL&&!stop_requested)drive();continue;}
if(!attempts)log_line(0x07,"* connecting 10.0.2.2:%u",SERVER_PORT);
if(connect_host()!=0){unsigned long spins=0;++attempts;if(attempts==1||attempts%10==0)log_line(0x0C,"* connect failed; retry %u",attempts);while(spins++<60000UL&&!stop_requested)drive();continue;}
attempts=0; log_line(0x0A,"* connected; host automation owns console");
write_text("TCPAGENT READY\r\n"); used=0;
while(!stop_requested&&!socketp->isRemoteClosed()) {
drive(); rc=socketp->recv((uint8_t *)data,CHUNK_SIZE);
@@ -190,7 +244,7 @@ int main(void) {
if(fwrite(data+i,1,take,put_file)!=(size_t)take){fclose(put_file);put_file=0;put_remaining=0;error_text("Short write");}
else {
put_remaining-=take; i+=(int)take-1;
if(!put_remaining){fclose(put_file);put_file=0;ok_data((const unsigned char *)"",0);}
if(!put_remaining){char elapsed[24];fclose(put_file);put_file=0;elapsed_text(put_started,elapsed);log_line(0x0A,"< PUT OK %s",elapsed);ok_data((const unsigned char *)"",0);}
}
} else if(c=='\r'||c=='\n') {
if(used){linebuf[used]='\0';process_line(linebuf);used=0;}
@@ -199,6 +253,8 @@ int main(void) {
if(_bios_keybrd(1)){key=_bios_keybrd(0);if((key&0xff)==3||(key>>8)==45)stop_requested=1;}
}
socketp->close(); TcpSocketMgr::freeSocket(socketp); socketp=0;
if(!stop_requested)log_line(0x0C,"* link lost; retrying");
}
log_line(0x07,"* stopped; returning to DOS");
Utils::endStack(); return 0;
}