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devamlc comments and cleanups

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This commit is contained in:
Jim
2011-08-27 20:23:32 -04:00
parent 7230a331f3
commit cc4d7561ed
1 changed files with 46 additions and 23 deletions
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69
devamlc.h
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@@ -103,7 +103,7 @@ int devamlc (int class, int func, int device) {
The max AMLC output queue size is 1023 (octal 2000), so a poll
rate of 33 (1000/33 = 30 times per second) will generate about
31,000 chars per second. This rate may be further boosted if
there are lines DMQ buffers with 255 or more characters. */
there are DMQ buffers with 255 or more characters. */
#define AMLCPOLL 100
@@ -130,7 +130,9 @@ int devamlc (int class, int func, int device) {
#define CT_SERIAL 2
#define CT_DEDIP 3
/* terminal states needed to process telnet connections */
/* terminal states needed to process telnet connections.
Ref: http://support.microsoft.com/kb/231866
Ref: http://www.iana.org/assignments/telnet-options */
#define TS_DATA 0 /* data state, looking for IAC */
#define TS_IAC 1 /* have seen initial IAC */
@@ -156,7 +158,7 @@ int devamlc (int class, int func, int device) {
unsigned short ctinterrupt; /* 1 bit per line */
unsigned short dss; /* 1 bit per line */
unsigned short connected; /* 1 bit per line */
unsigned short dedicated; /* 1 bit per line */
unsigned short serial; /* true if any CT_SERIAL lines */
unsigned short dsstime; /* countdown to dss poll */
short fd[16]; /* Unix fd, 1 per line */
unsigned short tstate[16]; /* telnet state */
@@ -249,26 +251,46 @@ int devamlc (int class, int func, int device) {
for (dx2=0; dx2<MAXBOARDS; dx2++) {
dc[dx2].deviceid = 0;
dc[dx2].connected = 0;
dc[dx2].serial = 0;
for (lx = 0; lx < 16; lx++) {
dc[dx2].connected = 0;
dc[dx2].dedicated = 0;
for (lx = 0; lx < 16; lx++) {
dc[dx2].fd[lx] = -1;
dc[dx2].tstate[lx] = TS_DATA;
dc[dx2].room[lx] = 64;
dc[dx2].lconf[lx] = 0;
dc[dx2].ctype[lx] = CT_SOCKET;
dc[dx2].modemstate[lx] = 0;
}
dc[dx2].recvlx = 0;
dc[dx2].fd[lx] = -1;
dc[dx2].tstate[lx] = TS_DATA;
dc[dx2].room[lx] = 64;
dc[dx2].lconf[lx] = 0;
dc[dx2].ctype[lx] = CT_SOCKET;
dc[dx2].modemstate[lx] = 0;
}
dc[dx2].recvlx = 0;
}
/* read the AMLC file, to see if any lines should be connected to
real serial devices. This file has the format:
<line #> <Unix device name>
The entries can be in any order. If the line number begins with
/* read the amlc.cfg file. This file has 3 uses:
1. maps Prime async lines to real serial devices, like host
serial ports or USB serial boxes.
Format: <line #> /dev/<Unix usb device name>
2. maps incoming telnet connections from a specific IP
address to a specific Prime async line. This is used for
serial device servers with a serial port + serial device
on one side and TCP/IP on the other. When the serial
device is turned on, the SDS initiates a telnet connection
to the Prime, then serial data flows back and forth.
Format: <line #> tcpaddr NOTE: no port number!
3. specify Prime async lines that should be connected at all
times to a specific IP address:port. This is used for
network printers for example. If the connection dies, the
emulator will try to reconnect periodically.
Format: <line #> tcpaddr:port NOTE: has port number!
Entries can be in any order. If the line number begins with
a zero, it is assumed to be octal. If no zero, then decimal.
Lines specified in amlc.cfg will not be used by the
emulator's built-in terminal server.
*/
if ((cfgfile = fopen("amlc.cfg", "r")) == NULL) {
@@ -305,7 +327,7 @@ int devamlc (int class, int func, int device) {
printf("em: connected AMLC line '%o (%d) to device %s\n", i, i, devname);
dc[dx2].fd[lx] = fd;
dc[dx2].connected |= BITMASK16(lx+1);
dc[dx2].dedicated |= BITMASK16(lx+1);
dc[dx2].serial = 1;
dc[dx2].ctype[lx] = CT_SERIAL;
} else {
@@ -317,7 +339,8 @@ int devamlc (int class, int func, int device) {
}
/* break out host and port number; no port means this is
incoming dedicated line: no connects out */
an incoming dedicated line: no connects out. With a
port means we need to connect to it. */
if ((p=strtok(devname, PDELIM)) != NULL) {
host = gethostbyname(p);
@@ -450,8 +473,8 @@ int devamlc (int class, int func, int device) {
turning on bit 0100, but are turning on 0x0100. */
#define TIOCM_CD 0x0100
if (func == 00) { /* input Data Set Sense (carrier) */
if (dc[dx].dedicated) { /* any serial connections? */
if (func == 00) { /* input Data Set Sense (carrier) */
if (dc[dx].serial) { /* any serial connections? */
if (--dc[dx].dsstime == 0) {
dc[dx].dsstime = DSSCOUNTDOWN;
for (lx = 0; lx < 16; lx++) { /* yes, poll them */
@@ -726,7 +749,7 @@ int devamlc (int class, int func, int device) {
ipaddr = ntohl(addr.sin_addr.s_addr);
snprintf(ipstring, sizeof(ipstring), "%d.%d.%d.%d", (ipaddr&0xFF000000)>>24, (ipaddr&0x00FF0000)>>16,
(ipaddr&0x0000FF00)>>8, (ipaddr&0x000000FF));
printf("Connect from IP %x\n", ipaddr);
//printf("Connect from IP %s\n", ipstring);
/* if there are dedicated AMLC lines (specific IP address), we
have to make 2 passes: the first pass checks for IP address