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SCP: Fix EXPECT processing to avoid comparing against old data

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This commit is contained in:
Mark Pizzolato 2017-09-13 17:02:16 -07:00
parent 202e49cfdf
commit 2574100ec5
2 changed files with 16 additions and 10 deletions
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25
scp.c
View File

@ -10500,7 +10500,7 @@ exp->size = 0;
free (exp->buf);
exp->buf = NULL;
exp->buf_size = 0;
exp->buf_ins = 0;
exp->buf_data = exp->buf_ins = 0;
return SCPE_OK;
}
@ -10704,6 +10704,8 @@ if ((!exp) || (!exp->rules)) /* Anying to check? */
exp->buf[exp->buf_ins++] = data; /* Save new data */
exp->buf[exp->buf_ins] = '\0'; /* Nul terminate for RegEx match */
if (exp->buf_data < exp->buf_size)
++exp->buf_data; /* Record amount of data in buffer */
for (i=0; i < exp->size; i++) {
ep = &exp->rules[i];
@ -10718,8 +10720,8 @@ for (i=0; i < exp->size; i++) {
else {
if (strlen ((char *)exp->buf) != exp->buf_ins) { /* Nul characters in buffer? */
size_t off;
tstr = (char *)malloc (exp->buf_ins + 1);
tstr = (char *)malloc (exp->buf_ins + 1);
tstr[0] = '\0';
for (off=0; off < exp->buf_ins; off += 1 + strlen ((char *)&exp->buf[off]))
strcpy (&tstr[strlen (tstr)], (char *)&exp->buf[off]);
@ -10762,7 +10764,9 @@ for (i=0; i < exp->size; i++) {
#endif
}
else {
if (exp->buf_ins < ep->size) { /* Match stradle end of buffer */
if (exp->buf_data < ep->size) /* Too little data to match yet? */
continue; /* Yes, Try next one. */
if (exp->buf_ins < ep->size) { /* Match might stradle end of buffer */
/*
* First compare the newly deposited data at the beginning
* of buffer with the end of the match string
@ -10777,8 +10781,8 @@ for (i=0; i < exp->size; i++) {
free (estr);
free (mstr);
}
if (memcmp (exp->buf, &ep->match[ep->size-exp->buf_ins], exp->buf_ins))
continue;
if (memcmp (exp->buf, &ep->match[ep->size-exp->buf_ins], exp->buf_ins)) /* Tail Match? */
continue; /* Nope, Try next one. */
}
if (sim_deb && exp->dptr && (exp->dptr->dctrl & exp->dbit)) {
char *estr = sim_encode_quoted_string (&exp->buf[exp->buf_size-(ep->size-exp->buf_ins)], ep->size-exp->buf_ins);
@ -10789,8 +10793,8 @@ for (i=0; i < exp->size; i++) {
free (estr);
free (mstr);
}
if (memcmp (&exp->buf[exp->buf_size-(ep->size-exp->buf_ins)], ep->match, ep->size-exp->buf_ins))
continue;
if (memcmp (&exp->buf[exp->buf_size-(ep->size-exp->buf_ins)], ep->match, ep->size-exp->buf_ins)) /* Front Match? */
continue; /* Nope, Try next one. */
break;
}
else {
@ -10803,8 +10807,8 @@ for (i=0; i < exp->size; i++) {
free (estr);
free (mstr);
}
if (memcmp (&exp->buf[exp->buf_ins-ep->size], ep->match, ep->size))
continue;
if (memcmp (&exp->buf[exp->buf_ins-ep->size], ep->match, ep->size)) /* Whole string match? */
continue; /* Nope, Try next one. */
break;
}
}
@ -10818,6 +10822,7 @@ if (exp->buf_ins == exp->buf_size) { /* At end of match buffe
used when no regular expression rules are in effect */
memmove (exp->buf, &exp->buf[exp->buf_size/2], exp->buf_size-(exp->buf_size/2));
exp->buf_ins -= exp->buf_size/2;
exp->buf_data = exp->buf_ins;
sim_debug (exp->dbit, exp->dptr, "Buffer Full - sliding the last %d bytes to start of buffer new insert at: %d\n", (exp->buf_size/2), exp->buf_ins);
}
else {
@ -10853,7 +10858,7 @@ if (i != exp->size) { /* Found? */
exp->after);
}
/* Matched data is no longer available for future matching */
exp->buf_ins = 0;
exp->buf_data = exp->buf_ins = 0;
}
free (tstr);
return SCPE_OK;

1
sim_defs.h
View File

@ -796,6 +796,7 @@ struct EXPECT {
uint8 *buf; /* buffer of output data which has produced */
uint32 buf_ins; /* buffer insertion point for the next output data */
uint32 buf_size; /* buffer size */
uint32 buf_data; /* count of data in buffer */
};
/* Send Context */