diff options
Diffstat (limited to 'net/ax25/ax25_addr.c')
| -rw-r--r-- | net/ax25/ax25_addr.c | 85 |
1 files changed, 51 insertions, 34 deletions
diff --git a/net/ax25/ax25_addr.c b/net/ax25/ax25_addr.c index f4fa6dfb846..e7c9b0ea17a 100644 --- a/net/ax25/ax25_addr.c +++ b/net/ax25/ax25_addr.c @@ -11,7 +11,7 @@ #include <linux/socket.h> #include <linux/in.h> #include <linux/kernel.h> -#include <linux/sched.h> +#include <linux/module.h> #include <linux/timer.h> #include <linux/string.h> #include <linux/sockios.h> @@ -22,23 +22,32 @@ #include <linux/skbuff.h> #include <net/sock.h> #include <asm/uaccess.h> -#include <asm/system.h> #include <linux/fcntl.h> #include <linux/mm.h> #include <linux/interrupt.h> /* - * The null address is defined as a callsign of all spaces with an - * SSID of zero. + * The default broadcast address of an interface is QST-0; the default address + * is LINUX-1. The null address is defined as a callsign of all spaces with + * an SSID of zero. */ -ax25_address null_ax25_address = {{0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00}}; + +const ax25_address ax25_bcast = + {{'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, 0 << 1}}; +const ax25_address ax25_defaddr = + {{'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, 1 << 1}}; +const ax25_address null_ax25_address = + {{' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, 0 << 1}}; + +EXPORT_SYMBOL_GPL(ax25_bcast); +EXPORT_SYMBOL_GPL(ax25_defaddr); +EXPORT_SYMBOL(null_ax25_address); /* * ax25 -> ascii conversion */ -char *ax2asc(ax25_address *a) +char *ax2asc(char *buf, const ax25_address *a) { - static char buf[11]; char c, *s; int n; @@ -65,46 +74,47 @@ char *ax2asc(ax25_address *a) } +EXPORT_SYMBOL(ax2asc); + /* * ascii -> ax25 conversion */ -ax25_address *asc2ax(char *callsign) +void asc2ax(ax25_address *addr, const char *callsign) { - static ax25_address addr; - char *s; + const 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; } +EXPORT_SYMBOL(asc2ax); + /* * Compare two ax.25 addresses */ -int ax25cmp(ax25_address *a, ax25_address *b) +int ax25cmp(const ax25_address *a, const ax25_address *b) { int ct = 0; @@ -114,16 +124,18 @@ int ax25cmp(ax25_address *a, ax25_address *b) ct++; } - if ((a->ax25_call[ct] & 0x1E) == (b->ax25_call[ct] & 0x1E)) /* SSID without control bit */ - return 0; + if ((a->ax25_call[ct] & 0x1E) == (b->ax25_call[ct] & 0x1E)) /* SSID without control bit */ + return 0; - return 2; /* Partial match */ + return 2; /* Partial match */ } +EXPORT_SYMBOL(ax25cmp); + /* * Compare two AX.25 digipeater paths. */ -int ax25digicmp(ax25_digi *digi1, ax25_digi *digi2) +int ax25digicmp(const ax25_digi *digi1, const ax25_digi *digi2) { int i; @@ -144,7 +156,9 @@ int ax25digicmp(ax25_digi *digi1, ax25_digi *digi2) * Given an AX.25 address pull of to, from, digi list, command/response and the start of data * */ -unsigned char *ax25_addr_parse(unsigned char *buf, int len, ax25_address *src, ax25_address *dest, ax25_digi *digi, int *flags, int *dama) +const unsigned char *ax25_addr_parse(const unsigned char *buf, int len, + ax25_address *src, ax25_address *dest, ax25_digi *digi, int *flags, + int *dama) { int d = 0; @@ -175,8 +189,10 @@ unsigned char *ax25_addr_parse(unsigned char *buf, int len, ax25_address *src, a digi->ndigi = 0; while (!(buf[-1] & AX25_EBIT)) { - if (d >= AX25_MAX_DIGIS) return NULL; /* Max of 6 digis */ - if (len < 7) return NULL; /* Short packet */ + if (d >= AX25_MAX_DIGIS) + return NULL; + if (len < AX25_ADDR_LEN) + return NULL; memcpy(&digi->calls[d], buf, AX25_ADDR_LEN); digi->ndigi = d + 1; @@ -199,7 +215,8 @@ unsigned char *ax25_addr_parse(unsigned char *buf, int len, ax25_address *src, a /* * Assemble an AX.25 header from the bits */ -int ax25_addr_build(unsigned char *buf, ax25_address *src, ax25_address *dest, ax25_digi *d, int flag, int modulus) +int ax25_addr_build(unsigned char *buf, const ax25_address *src, + const ax25_address *dest, const ax25_digi *d, int flag, int modulus) { int len = 0; int ct = 0; @@ -256,7 +273,7 @@ int ax25_addr_build(unsigned char *buf, ax25_address *src, ax25_address *dest, a return len; } -int ax25_addr_size(ax25_digi *dp) +int ax25_addr_size(const ax25_digi *dp) { if (dp == NULL) return 2 * AX25_ADDR_LEN; @@ -267,7 +284,7 @@ int ax25_addr_size(ax25_digi *dp) /* * Reverse Digipeat List. May not pass both parameters as same struct */ -void ax25_digi_invert(ax25_digi *in, ax25_digi *out) +void ax25_digi_invert(const ax25_digi *in, ax25_digi *out) { int ct; |