From baed16a7ff5194487764db300c2753ac7409c4c5 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 8 Sep 2005 13:40:41 -0700 Subject: [PATCH] [AX.25]: Make asc2ax() thread-proof 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 Signed-off-by: David S. Miller --- include/net/ax25.h | 2 +- net/ax25/ax25_addr.c | 27 ++++++++++++--------------- net/rose/rose_subr.c | 4 ++-- 3 files changed, 15 insertions(+), 18 deletions(-) diff --git a/include/net/ax25.h b/include/net/ax25.h index 364b046..227d337 100644 --- a/include/net/ax25.h +++ b/include/net/ax25.h @@ -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 *); diff --git a/net/ax25/ax25_addr.c b/net/ax25/ax25_addr.c index dca179d..0164a15 100644 --- a/net/ax25/ax25_addr.c +++ b/net/ax25/ax25_addr.c @@ -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; } /* diff --git a/net/rose/rose_subr.c b/net/rose/rose_subr.c index 02891ce..36a7794 100644 --- a/net/rose/rose_subr.c +++ b/net/rose/rose_subr.c @@ -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; -- 2.7.4