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Checksum.

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This commit is contained in:
dcp1990 2005-06-22 04:01:03 +00:00
parent fc336c1103
commit 602feb2016
3 changed files with 32 additions and 14 deletions
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41
phoned/cid.c
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@ -27,7 +27,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $Amigan: phoned/phoned/cid.c,v 1.7 2005/06/21 01:13:26 dcp1990 Exp $ */
/* $Amigan: phoned/phoned/cid.c,v 1.8 2005/06/22 04:01:03 dcp1990 Exp $ */
/* system includes */
#include <stdlib.h>
#include <limits.h>
@ -37,8 +37,9 @@
#include <ctype.h>
#include <stdio.h>
#include <phoned.h>
#define BOGUS(pnt, cl, st, orig) if(pnt + cl > orig + st) { \
lprintf(error, "Packet length of %d is bogus (len is %d!)", cl, st); break; }
/* ex: BOGUS(p, cpl, i, s, "numb"); */
#define BOGUS(pnt, cl, st, orig, part) if(pnt + cl - 1 > orig + st) { \
lprintf(error, "%s: Packet length of %d is bogus (len is %d, would be 0x%x when should 0x%x!)", part, cl, st, pnt + cl, orig + st); break; }
int free_cid(cid_t* ctf)
{
free(ctf->name);
@ -51,13 +52,14 @@ cid_t *decode_sdmf(s)
{
unsigned char *p;
unsigned char dtbuf[2];
int i = 0, ld;
int i = 0, ld, rsz, j, cstotal, checksum;
cid_t *c;
if(*s != 0x04) return NULL; /* 0x04 is SDMF, anything else is garbage */
c = malloc(sizeof(cid_t));
memset(c, 0x0, sizeof(cid_t));
c->name = strdup("NO NAME");
p = s;
rsz = strlen(s);
p++;
ld = *p++;
i = strlen(p);
@ -76,6 +78,14 @@ cid_t *decode_sdmf(s)
c->minute = ((*dtbuf - '0') * 10) + (dtbuf[1] - '0');
c->number = malloc(strlen(p) * sizeof(unsigned char));
snprintf(c->number, strlen(p), "%s", p);
checksum = s[rsz - 1];
cstotal = 0;
for(j = 0; j < rsz - 1; j++) {
cstotal += s[j];
}
if((cstotal & 0xff) + checksum != 256)
lprintf(warn, "decode_sdmf: Warning: Checksum failed! (0x%x real, cs was 0x%x, total %d)",
(cstotal & 0xff) + checksum, checksum, cstotal);
return c;
}
@ -84,11 +94,13 @@ cid_t *decode_mdmf(s)
{
unsigned char *p;
unsigned char dtbuf[2];
int i = 0, j = 0, ld, cpl, checksum;
int i = 0, j = 0, ld, cpl, checksum, rsz;
int cstotal;
cid_t *c;
if(*s != 0x80) return NULL; /* 0x04 is SDMF, anything else is garbage */
c = malloc(sizeof(cid_t));
memset(c, 0x0, sizeof(cid_t));
rsz = strlen(s);
p = s;
p++;
ld = *p++;
@ -98,7 +110,7 @@ cid_t *decode_mdmf(s)
switch(*p++) { /* data type */
case 0x01: /* date and time */
cpl = *p++;
BOGUS(p, cpl, i, s);
BOGUS(p, cpl, i, s, "dtime");
if(cpl != 8) lprintf(warn, "decode_mdmf: Warning: date length != 8 (%d really)", cpl);
*dtbuf = *p++;
dtbuf[1] = *p++;
@ -116,7 +128,7 @@ cid_t *decode_mdmf(s)
break;
case 0x02: /* number */
cpl = *p++;
BOGUS(p, cpl, i, s);
BOGUS(p, cpl, i, s, "numb");
if(cpl != 10) lprintf(info, "decode_mdmf: Info: number length != 10 (%d really)", cpl);
c->number = malloc(cpl * sizeof(unsigned char));
memset(c->number, 0, cpl * sizeof(unsigned char));
@ -127,7 +139,7 @@ cid_t *decode_mdmf(s)
break;
case 0x04: /* number not available */
cpl = *p++;
BOGUS(p, cpl, i, s);
BOGUS(p, cpl, i, s, "nna");
if(cpl < 0x01) {
lprintf(warn, "decode_mdmf: Warning: type 0x04 (no number) len < 1 (%d really)", cpl);
break;
@ -139,7 +151,7 @@ cid_t *decode_mdmf(s)
break;
case 0x07: /* name */
cpl = *p++;
BOGUS(p, cpl, i, s);
BOGUS(p, cpl, i, s, "name");
c->name = malloc(cpl * sizeof(unsigned char));
memset(c->name, 0, cpl * sizeof(unsigned char));
for(j = 0; j < cpl && p != 0; j++) {
@ -156,7 +168,7 @@ cid_t *decode_mdmf(s)
break;
case 0x08: /* name not available */
cpl = *p++;
BOGUS(p, cpl, i, s);
BOGUS(p, cpl, i, s, "nana");
if(cpl < 0x01) {
lprintf(warn, "decode_mdmf: Warning: type 0x08 (no name) len < 1 (%d really)", cpl);
break;
@ -174,7 +186,14 @@ cid_t *decode_mdmf(s)
break;
}
}
lprintf(info, "Finished mdmf (%d/%d %d:%d %s -- %s)", c->month, c->day, c->hour, c->minute, c->name, c->number);
checksum = s[rsz - 1];
cstotal = 0;
for(j = 0; j < rsz - 1; j++) {
cstotal += s[j];
}
if((cstotal & 0xff) + checksum != 256)
lprintf(warn, "decode_mdmf: Warning: Checksum failed! (0x%x real, cs was 0x%x, total %d)",
(cstotal & 0xff) + checksum, checksum, cstotal);
return c;
}

2
phoned/modem.c
View File

@ -163,7 +163,7 @@ void modem_hread(char* cbuf)
pthread_mutex_lock(&buffermx);
if(cou < sizeof(buffer) - 2)
buffer[cou] = cbuf[0];
if(buffer[0] == '8' && buffer[1] == '0')
if((buffer[0] == '8' && buffer[1] == '0') || (buffer[0] == '0' && buffer[1] == '4'))
doing_cid = 1;
if(cbuf[0] == '\n') {
/* lprintf(debug, "Modem said %s", buffer); */

3
phoned/remote.c
View File

@ -28,7 +28,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $Amigan: phoned/phoned/remote.c,v 1.10 2005/06/21 01:13:26 dcp1990 Exp $ */
/* $Amigan: phoned/phoned/remote.c,v 1.11 2005/06/22 04:01:03 dcp1990 Exp $ */
/* system includes */
#include <string.h>
#include <stdio.h>
@ -262,7 +262,6 @@ char *parse_command(cmd, cont, s)
} else if(CHK("tparse")) {
cid_t* rc;
rc = parse_cid("802701083132323130383234070F5354414E444953482048454154494E020A343031333937333337325C\n");
lprintf(info, "nam=%s;month=%d\n", rc->name, rc->month);
cid_log(rc);
cid_notify(rc);
free(rc);