CCAN: update to get latest rune decode fix.

We didn't handle \ in fields properly, unless they were one-char long.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

ccan/README

@@ -1,3 +1,3 @@
 CCAN imported from http://ccodearchive.net.
 
-CCAN version: init-2545-g7b11e744
+CCAN version: init-2548-gab87e56b

ccan/ccan/rune/coding.c

@@ -98,7 +98,7 @@ static void rune_altern_encode(const struct rune_altern *altern,
 			break;
 		esc[1] = p[len];
 		cb(esc, 2, arg);
-		p++;
+		p += len + 1;
 	}
 }
 
@@ -184,7 +184,7 @@ static bool pull_char(const char **data, size_t *len, char *c)
 	return true;
 }
 
-static bool is_valid_cond(enum rune_condition cond)
+bool rune_condition_is_valid(enum rune_condition cond)
 {
 	switch (cond) {
 	case RUNE_COND_IF_MISSING:
@@ -203,31 +203,35 @@ static bool is_valid_cond(enum rune_condition cond)
 	return false;
 }
 
+size_t rune_altern_fieldname_len(const char *alternstr, size_t alternstrlen)
+{
+	for (size_t i = 0; i < alternstrlen; i++) {
+		if (cispunct(alternstr[i]))
+			return i;
+	}
+	return alternstrlen;
+}
+
 /* Sets *more on success: true if another altern follows */
 static struct rune_altern *rune_altern_decode(const tal_t *ctx,
 					      const char **data, size_t *len,
 					      bool *more)
 {
 	struct rune_altern *alt = tal(ctx, struct rune_altern);
-	const char *strstart = *data;
 	char *value;
-	size_t strlen = 0;
+	size_t strlen;
 	char c;
 
-        /* Swallow field up to conditional */
-	for (;;) {
-		if (!pull_char(data, len, &c))
-			return tal_free(alt);
-		if (cispunct(c))
-			break;
-		strlen++;
-	}
+        /* Swallow field up to possible conditional */
+	strlen = rune_altern_fieldname_len(*data, *len);
+	alt->fieldname = tal_strndup(alt, *data, strlen);
+	*data += strlen;
+	*len -= strlen;
 
-	alt->fieldname = tal_strndup(alt, strstart, strlen);
-	if (!is_valid_cond(c)) {
-		pull_invalid(data, len);
+	/* Grab conditional */
+	if (!pull_char(data, len, &c) || !rune_condition_is_valid(c))
 		return tal_free(alt);
-	}
+
 	alt->condition = c;
 
 	/* Assign worst case. */

ccan/ccan/rune/rune.h

@@ -376,4 +376,25 @@ char *rune_to_string(const tal_t *ctx, const struct rune *rune);
 struct rune_restr *rune_restr_from_string(const tal_t *ctx,
 					  const char *str,
 					  size_t len);
+
+/**
+ * rune_condition_is_valid: is this a valid condition?
+ * @cond: potential condition character.
+ *
+ * Returns true if it's one of enum rune_condition.
+ */
+bool rune_condition_is_valid(enum rune_condition cond);
+
+/**
+ * rune_altern_fieldname_len: how much of this string is condition?
+ * @alternstr: potential alternative string
+ * @alternstrlen: length
+ *
+ * This helps parsing your own runes.
+ *
+ * Returns the first possible condition (check with rune_condition_is_valid)
+ * or alternstrlen if none found.
+ */
+size_t rune_altern_fieldname_len(const char *alternstr, size_t alternstrlen);
+
 #endif /* CCAN_RUNE_RUNE_H */

ccan/ccan/rune/test/run-altern-escape.c

@@ -0,0 +1,37 @@
+#include <ccan/rune/rune.c>
+#include <ccan/rune/coding.c>
+#include <ccan/tal/grab_file/grab_file.h>
+#include <ccan/tal/str/str.h>
+#include <ccan/tap/tap.h>
+
+int main(void)
+{
+	static const u8 secret_zero[16];
+	struct rune *rune;
+	struct rune_restr *restr;
+	const tal_t *ctx = tal(NULL, char);
+
+	plan_tests(9);
+	restr = rune_restr_from_string(ctx, "desc=@tipjar\\|jb55@sendsats.lol",
+				       strlen("desc=@tipjar\\|jb55@sendsats.lol"));
+	ok1(tal_count(restr->alterns) == 1);
+	ok1(restr->alterns[0]->condition == '=');
+	ok1(streq(restr->alterns[0]->fieldname, "desc"));
+	ok1(streq(restr->alterns[0]->value, "@tipjar|jb55@sendsats.lol"));
+
+	rune = rune_new(ctx, secret_zero, sizeof(secret_zero), NULL); 
+	rune_add_restr(rune, take(restr));
+
+	/* Converting via base64 should not change it! */
+	rune = rune_from_base64(ctx, rune_to_base64(ctx, rune));
+	ok1(tal_count(rune->restrs) == 1);
+	restr = rune->restrs[0];
+	ok1(tal_count(restr->alterns) == 1);
+	ok1(restr->alterns[0]->condition == '=');
+	ok1(streq(restr->alterns[0]->fieldname, "desc"));
+	ok1(streq(restr->alterns[0]->value, "@tipjar|jb55@sendsats.lol"));
+	
+	tal_free(ctx);
+	/* This exits depending on whether all tests passed */
+	return exit_status();
+}

ccan/ccan/rune/test/run.c

@@ -83,12 +83,12 @@ int main(void)
 			ok1(rune_is_derived_anyversion(rune1, rune2) == NULL);
 
 			restr = rune_restr_new(NULL);
-			for (size_t i = 4; parts[i]; i+=3) {
+			for (size_t j = 4; parts[j]; j+=3) {
 				struct rune_altern *alt;
 				alt = rune_altern_new(NULL,
-						      parts[i],
-						      parts[i+1][0],
-						      parts[i+2]);
+						      parts[j],
+						      parts[j+1][0],
+						      parts[j+2]);
 				rune_restr_add_altern(restr, take(alt));
 			}
 			rune_add_restr(rune1, take(restr));

ccan/ccan/tal/tal.c

@@ -777,7 +777,7 @@ void *tal_dup_(const tal_t *ctx, const void *p, size_t size,
 		(void)taken(p);
 		return NULL;
 	}
-
+	
 	if (!adjust_size(&nbytes, n)) {
 		if (taken(p))
 			tal_free(p);