X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=net%2Fcore%2Futils.c;h=2682490777dec6ceea515596d11f6c7117910147;hb=1143e5a6d4d69cd36d44e0184769aa2b17041a10;hp=4f96f389243d7d6322288609f6477c74eab5ac09;hpb=60e04a5c533785c23ce6b76a6e5058328fe68edb;p=powerpc.git

diff --git a/net/core/utils.c b/net/core/utils.c
index 4f96f38924..2682490777 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -4,6 +4,7 @@
  *	Authors:
  *	net_random Alan Cox
  *	net_ratelimit Andy Kleen
+ *	in{4,6}_pton YOSHIFUJI Hideaki, Copyright (C)2006 USAGI/WIDE Project
  *
  *	Created by Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
  *
@@ -130,12 +131,13 @@ void __init net_random_init(void)
 static int net_random_reseed(void)
 {
 	int i;
-	unsigned long seed[NR_CPUS];
+	unsigned long seed;
 
-	get_random_bytes(seed, sizeof(seed));
 	for_each_possible_cpu(i) {
 		struct nrnd_state *state = &per_cpu(net_rand_state,i);
-		__net_srandom(state, seed[i]);
+
+		get_random_bytes(&seed, sizeof(seed));
+		__net_srandom(state, seed);
 	}
 	return 0;
 }
@@ -190,3 +192,215 @@ __be32 in_aton(const char *str)
 }
 
 EXPORT_SYMBOL(in_aton);
+
+#define IN6PTON_XDIGIT		0x00010000
+#define IN6PTON_DIGIT		0x00020000
+#define IN6PTON_COLON_MASK	0x00700000
+#define IN6PTON_COLON_1		0x00100000	/* single : requested */
+#define IN6PTON_COLON_2		0x00200000	/* second : requested */
+#define IN6PTON_COLON_1_2	0x00400000	/* :: requested */
+#define IN6PTON_DOT		0x00800000	/* . */
+#define IN6PTON_DELIM		0x10000000
+#define IN6PTON_NULL		0x20000000	/* first/tail */
+#define IN6PTON_UNKNOWN		0x40000000
+
+static inline int digit2bin(char c, char delim)
+{
+	if (c == delim || c == '\0')
+		return IN6PTON_DELIM;
+	if (c == '.')
+		return IN6PTON_DOT;
+	if (c >= '0' && c <= '9')
+		return (IN6PTON_DIGIT | (c - '0'));
+	return IN6PTON_UNKNOWN;
+}
+
+static inline int xdigit2bin(char c, char delim)
+{
+	if (c == delim || c == '\0')
+		return IN6PTON_DELIM;
+	if (c == ':')
+		return IN6PTON_COLON_MASK;
+	if (c == '.')
+		return IN6PTON_DOT;
+	if (c >= '0' && c <= '9')
+		return (IN6PTON_XDIGIT | IN6PTON_DIGIT| (c - '0'));
+	if (c >= 'a' && c <= 'f')
+		return (IN6PTON_XDIGIT | (c - 'a' + 10));
+	if (c >= 'A' && c <= 'F')
+		return (IN6PTON_XDIGIT | (c - 'A' + 10));
+	return IN6PTON_UNKNOWN;
+}
+
+int in4_pton(const char *src, int srclen,
+	     u8 *dst,
+	     char delim, const char **end)
+{
+	const char *s;
+	u8 *d;
+	u8 dbuf[4];
+	int ret = 0;
+	int i;
+	int w = 0;
+
+	if (srclen < 0)
+		srclen = strlen(src);
+	s = src;
+	d = dbuf;
+	i = 0;
+	while(1) {
+		int c;
+		c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
+		if (!(c & (IN6PTON_DIGIT | IN6PTON_DOT | IN6PTON_DELIM))) {
+			goto out;
+		}
+		if (c & (IN6PTON_DOT | IN6PTON_DELIM)) {
+			if (w == 0)
+				goto out;
+			*d++ = w & 0xff;
+			w = 0;
+			i++;
+			if (c & IN6PTON_DELIM) {
+				if (i != 4)
+					goto out;
+				break;
+			}
+			goto cont;
+		}
+		w = (w * 10) + c;
+		if ((w & 0xffff) > 255) {
+			goto out;
+		}
+cont:
+		if (i >= 4)
+			goto out;
+		s++;
+		srclen--;
+	}
+	ret = 1;
+	memcpy(dst, dbuf, sizeof(dbuf));
+out:
+	if (end)
+		*end = s;
+	return ret;
+}
+
+EXPORT_SYMBOL(in4_pton);
+
+int in6_pton(const char *src, int srclen,
+	     u8 *dst,
+	     char delim, const char **end)
+{
+	const char *s, *tok = NULL;
+	u8 *d, *dc = NULL;
+	u8 dbuf[16];
+	int ret = 0;
+	int i;
+	int state = IN6PTON_COLON_1_2 | IN6PTON_XDIGIT | IN6PTON_NULL;
+	int w = 0;
+
+	memset(dbuf, 0, sizeof(dbuf));
+
+	s = src;
+	d = dbuf;
+	if (srclen < 0)
+		srclen = strlen(src);
+
+	while (1) {
+		int c;
+
+		c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
+		if (!(c & state))
+			goto out;
+		if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
+			/* process one 16-bit word */
+			if (!(state & IN6PTON_NULL)) {
+				*d++ = (w >> 8) & 0xff;
+				*d++ = w & 0xff;
+			}
+			w = 0;
+			if (c & IN6PTON_DELIM) {
+				/* We've processed last word */
+				break;
+			}
+			/*
+			 * COLON_1 => XDIGIT
+			 * COLON_2 => XDIGIT|DELIM
+			 * COLON_1_2 => COLON_2
+			 */
+			switch (state & IN6PTON_COLON_MASK) {
+			case IN6PTON_COLON_2:
+				dc = d;
+				state = IN6PTON_XDIGIT | IN6PTON_DELIM;
+				if (dc - dbuf >= sizeof(dbuf))
+					state |= IN6PTON_NULL;
+				break;
+			case IN6PTON_COLON_1|IN6PTON_COLON_1_2:
+				state = IN6PTON_XDIGIT | IN6PTON_COLON_2;
+				break;
+			case IN6PTON_COLON_1:
+				state = IN6PTON_XDIGIT;
+				break;
+			case IN6PTON_COLON_1_2:
+				state = IN6PTON_COLON_2;
+				break;
+			default:
+				state = 0;
+			}
+			tok = s + 1;
+			goto cont;
+		}
+
+		if (c & IN6PTON_DOT) {
+			ret = in4_pton(tok ? tok : s, srclen + (int)(s - tok), d, delim, &s);
+			if (ret > 0) {
+				d += 4;
+				break;
+			}
+			goto out;
+		}
+
+		w = (w << 4) | (0xff & c);
+		state = IN6PTON_COLON_1 | IN6PTON_DELIM;
+		if (!(w & 0xf000)) {
+			state |= IN6PTON_XDIGIT;
+		}
+		if (!dc && d + 2 < dbuf + sizeof(dbuf)) {
+			state |= IN6PTON_COLON_1_2;
+			state &= ~IN6PTON_DELIM;
+		}
+		if (d + 2 >= dbuf + sizeof(dbuf)) {
+			state &= ~(IN6PTON_COLON_1|IN6PTON_COLON_1_2);
+		}
+cont:
+		if ((dc && d + 4 < dbuf + sizeof(dbuf)) ||
+		    d + 4 == dbuf + sizeof(dbuf)) {
+			state |= IN6PTON_DOT;
+		}
+		if (d >= dbuf + sizeof(dbuf)) {
+			state &= ~(IN6PTON_XDIGIT|IN6PTON_COLON_MASK);
+		}
+		s++;
+		srclen--;
+	}
+
+	i = 15; d--;
+
+	if (dc) {
+		while(d >= dc)
+			dst[i--] = *d--;
+		while(i >= dc - dbuf)
+			dst[i--] = 0;
+		while(i >= 0)
+			dst[i--] = *d--;
+	} else
+		memcpy(dst, dbuf, sizeof(dbuf));
+
+	ret = 1;
+out:
+	if (end)
+		*end = s;
+	return ret;
+}
+
+EXPORT_SYMBOL(in6_pton);