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[AX.25]: Make asc2ax() thread-proof

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Asc2ax was still using a static buffer for all invocations which isn't
exactly SMP-safe.  Change asc2ax to take an additional result buffer as
the argument.  Change all callers to provide such a buffer.

This one only really is a fix for ROSE and as per recent discussions
there's still much more to fix in ROSE ...

Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ralf Baechle 2005-09-08 13:40:41 -07:00 committed by David S. Miller
parent 3a93481589
commit baed16a7ff
3 changed files with 15 additions and 18 deletions
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2
include/net/ax25.h
View File

@ -258,7 +258,7 @@ extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
/* ax25_addr.c */
extern ax25_address null_ax25_address;
extern char *ax2asc(char *buf, ax25_address *);
extern ax25_address *asc2ax(char *);
extern void asc2ax(ax25_address *addr, char *callsign);
extern int ax25cmp(ax25_address *, ax25_address *);
extern int ax25digicmp(ax25_digi *, ax25_digi *);
extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *);

27
net/ax25/ax25_addr.c
View File

@ -67,37 +67,34 @@ char *ax2asc(char *buf, ax25_address *a)
/*
* ascii -> ax25 conversion
*/
ax25_address *asc2ax(char *callsign)
void asc2ax(ax25_address *addr, char *callsign)
{
static ax25_address addr;
char *s;
int n;
for (s = callsign, n = 0; n < 6; n++) {
if (*s != '\0' && *s != '-')
addr.ax25_call[n] = *s++;
addr->ax25_call[n] = *s++;
else
addr.ax25_call[n] = ' ';
addr.ax25_call[n] <<= 1;
addr.ax25_call[n] &= 0xFE;
addr->ax25_call[n] = ' ';
addr->ax25_call[n] <<= 1;
addr->ax25_call[n] &= 0xFE;
}
if (*s++ == '\0') {
addr.ax25_call[6] = 0x00;
return &addr;
addr->ax25_call[6] = 0x00;
return;
}
addr.ax25_call[6] = *s++ - '0';
addr->ax25_call[6] = *s++ - '0';
if (*s != '\0') {
addr.ax25_call[6] *= 10;
addr.ax25_call[6] += *s++ - '0';
addr->ax25_call[6] *= 10;
addr->ax25_call[6] += *s++ - '0';
}
addr.ax25_call[6] <<= 1;
addr.ax25_call[6] &= 0x1E;
return &addr;
addr->ax25_call[6] <<= 1;
addr->ax25_call[6] &= 0x1E;
}
/*

4
net/rose/rose_subr.c
View File

@ -337,13 +337,13 @@ static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *fac
memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);
memcpy(callsign, p + 12, l - 10);
callsign[l - 10] = '\0';
facilities->source_call = *asc2ax(callsign);
asc2ax(&facilities->source_call, callsign);
}
if (*p == FAC_CCITT_SRC_NSAP) {
memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);
memcpy(callsign, p + 12, l - 10);
callsign[l - 10] = '\0';
facilities->dest_call = *asc2ax(callsign);
asc2ax(&facilities->dest_call, callsign);
}
p += l + 2;
n += l + 2;