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-rw-r--r--src/lib/print.c790
1 files changed, 790 insertions, 0 deletions
diff --git a/src/lib/print.c b/src/lib/print.c
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index 0000000..57455b6
--- /dev/null
+++ b/src/lib/print.c
@@ -0,0 +1,790 @@
+/*
+ * print.c Routines to print stuff.
+ *
+ * Version: $Id$
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * Copyright 2000,2006 The FreeRADIUS server project
+ */
+
+RCSID("$Id$")
+
+#include <freeradius-devel/libradius.h>
+
+#include <ctype.h>
+
+/** Checks for utf-8, taken from http://www.w3.org/International/questions/qa-forms-utf-8
+ *
+ * @param str input string.
+ * @param inlen length of input string. May be -1 if str is \0 terminated.
+ */
+int fr_utf8_char(uint8_t const *str, ssize_t inlen)
+{
+ if (inlen == 0) return 0;
+
+ if (inlen < 0) inlen = 4; /* longest char */
+
+ if (*str < 0x20) return 0;
+
+ if (*str <= 0x7e) return 1; /* 1 */
+
+ if (*str <= 0xc1) return 0;
+
+ if (inlen < 2) return 0;
+
+ if ((str[0] >= 0xc2) && /* 2 */
+ (str[0] <= 0xdf) &&
+ (str[1] >= 0x80) &&
+ (str[1] <= 0xbf)) {
+ return 2;
+ }
+
+ if (inlen < 3) return 0;
+
+ if ((str[0] == 0xe0) && /* 3 */
+ (str[1] >= 0xa0) &&
+ (str[1] <= 0xbf) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf)) {
+ return 3;
+ }
+
+ if ((str[0] >= 0xe1) && /* 4a */
+ (str[0] <= 0xec) &&
+ (str[1] >= 0x80) &&
+ (str[1] <= 0xbf) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf)) {
+ return 3;
+ }
+
+ if ((str[0] >= 0xee) && /* 4b */
+ (str[0] <= 0xef) &&
+ (str[1] >= 0x80) &&
+ (str[1] <= 0xbf) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf)) {
+ return 3;
+ }
+
+ if ((str[0] == 0xed) && /* 5 */
+ (str[1] >= 0x80) &&
+ (str[1] <= 0x9f) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf)) {
+ return 3;
+ }
+
+ if (inlen < 4) return 0;
+
+ if ((str[0] == 0xf0) && /* 6 */
+ (str[1] >= 0x90) &&
+ (str[1] <= 0xbf) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf) &&
+ (str[3] >= 0x80) &&
+ (str[3] <= 0xbf)) {
+ return 4;
+ }
+
+ if ((str[0] >= 0xf1) && /* 6 */
+ (str[0] <= 0xf3) &&
+ (str[1] >= 0x80) &&
+ (str[1] <= 0xbf) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf) &&
+ (str[3] >= 0x80) &&
+ (str[3] <= 0xbf)) {
+ return 4;
+ }
+
+
+ if ((str[0] == 0xf4) && /* 7 */
+ (str[1] >= 0x80) &&
+ (str[1] <= 0x8f) &&
+ (str[2] >= 0x80) &&
+ (str[2] <= 0xbf) &&
+ (str[3] >= 0x80) &&
+ (str[3] <= 0xbf)) {
+ return 4;
+ }
+
+ /*
+ * Invalid UTF-8 Character
+ */
+ return 0;
+}
+
+/** Return a pointer to the first UTF8 char in a string.
+ *
+ * @param[out] chr_len Where to write the length of the multibyte char passed in chr (may be NULL).
+ * @param[in] str Haystack.
+ * @param[in] chr Multibyte needle.
+ * @return The position of chr in str or NULL if not found.
+ */
+char const *fr_utf8_strchr(int *chr_len, char const *str, char const *chr)
+{
+ int cchr;
+
+ cchr = fr_utf8_char((uint8_t const *)chr, -1);
+ if (cchr == 0) cchr = 1;
+ if (chr_len) *chr_len = cchr;
+
+ while (*str) {
+ int schr;
+
+ schr = fr_utf8_char((uint8_t const *) str, -1);
+ if (schr == 0) schr = 1;
+ if (schr != cchr) goto next;
+
+ if (memcmp(str, chr, schr) == 0) {
+ return (char const *) str;
+ }
+ next:
+ str += schr;
+ }
+
+ return NULL;
+}
+
+/** Escape any non printable or non-UTF8 characters in the input string
+ *
+ * @note Return value should be checked with is_truncated
+ * @note Will always \0 terminate unless outlen == 0.
+ *
+ * @param[in] in string to escape.
+ * @param[in] inlen length of string to escape (lets us deal with embedded NULs)
+ * @param[out] out where to write the escaped string.
+ * @param[out] outlen the length of the buffer pointed to by out.
+ * @param[in] quote the quotation character
+ * @return the number of bytes it WOULD HAVE written to the buffer, not including the trailing NUL
+ */
+size_t fr_prints(char *out, size_t outlen, char const *in, ssize_t inlen, char quote)
+{
+ uint8_t const *p = (uint8_t const *) in;
+ size_t utf8;
+ size_t used;
+ size_t freespace;
+
+ /* No input, so no output... */
+ if (!in) {
+ if (out && outlen) *out = '\0';
+ return 0;
+ }
+
+ /* Figure out the length of the input string */
+ if (inlen < 0) inlen = strlen(in);
+
+ /*
+ * No quotation character, just use memcpy, ensuring we
+ * don't overflow the output buffer.
+ */
+ if (!quote) {
+ if (!out) return inlen;
+
+ if ((size_t)inlen >= outlen) {
+ memcpy(out, in, outlen - 1);
+ out[outlen - 1] = '\0';
+ } else {
+ memcpy(out, in, inlen);
+ out[inlen] = '\0';
+ }
+
+ return inlen;
+ }
+
+ /*
+ * Check the output buffer and length. Zero both of them
+ * out if either are zero.
+ */
+ freespace = outlen;
+ if (freespace == 0) out = NULL;
+ if (!out) freespace = 0;
+
+ used = 0;
+
+ while (inlen > 0) {
+ int sp = 0;
+
+ /*
+ * Hack: never print trailing zero.
+ * Some clients send pings with an off-by-one
+ * length (confused with strings in C).
+ */
+ if ((inlen == 1) && (*p == '\0')) {
+ inlen--;
+ break;
+ }
+
+ /*
+ * Always escape the quotation character.
+ */
+ if (*p == quote) {
+ sp = quote;
+ goto do_escape;
+ }
+
+ /*
+ * Escape the backslash ONLY for single quoted strings.
+ */
+ if (quote == '\'') {
+ if (*p == '\\') {
+ sp = '\\';
+ }
+ goto do_escape;
+ }
+
+ /*
+ * Try to convert 0x0a --> \r, etc.
+ * Backslashes get handled specially.
+ */
+ switch (*p) {
+ case '\r':
+ sp = 'r';
+ break;
+
+ case '\n':
+ sp = 'n';
+ break;
+
+ case '\t':
+ sp = 't';
+ break;
+
+ case '\\':
+ sp = '\\';
+ break;
+
+ default:
+ sp = '\0';
+ break;
+ } /* escape the character at *p */
+
+ do_escape:
+ if (sp) {
+ if ((freespace > 0) && (freespace <= 2)) {
+ if (out) out[used] = '\0';
+ out = NULL;
+ freespace = 0;
+
+ } else if (freespace > 2) { /* room for char AND trailing zero */
+ if (out) {
+ out[used] = '\\';
+ out[used + 1] = sp;
+ }
+ freespace -= 2;
+ }
+
+ used += 2;
+ p++;
+ inlen--;
+ continue;
+ }
+
+ /*
+ * All strings are UTF-8 clean.
+ */
+ utf8 = fr_utf8_char(p, inlen);
+
+ /*
+ * If we have an invalid UTF-8 character, it gets
+ * copied over as a 1-byte character for single
+ * quoted strings. Which means that the output
+ * isn't strictly UTF-8, but oh well...
+ *
+ * For double quoted strints, the invalid
+ * characters get escaped as octal encodings.
+ */
+ if (utf8 == 0) {
+ if (quote == '\'') {
+ utf8 = 1;
+
+ } else {
+ if ((freespace > 0) && (freespace <= 4)) {
+ if (out) out[used] = '\0';
+ out = NULL;
+ freespace = 0;
+
+ } else if (freespace > 4) { /* room for char AND trailing zero */
+ if (out) snprintf(out + used, freespace, "\\%03o", *p);
+ freespace -= 4;
+ }
+
+ used += 4;
+ p++;
+ inlen--;
+ continue;
+ }
+ }
+
+ if ((freespace > 0) && (freespace <= utf8)) {
+ if (out) out[used] = '\0';
+ out = NULL;
+ freespace = 0;
+
+ } else if (freespace > utf8) { /* room for char AND trailing zero */
+ if (out) memcpy(out + used, p, utf8);
+ freespace -= utf8;
+ }
+
+ used += utf8;
+ p += utf8;
+ inlen -= utf8;
+ }
+
+ /*
+ * Ensure that the output buffer is always zero terminated.
+ */
+ if (out && freespace) out[used] = '\0';
+
+ return used;
+}
+
+/** Find the length of the buffer required to fully escape a string with fr_prints
+ *
+ * Were assuming here that's it's cheaper to figure out the length and do one
+ * alloc than repeatedly expand the buffer when we find extra chars which need
+ * to be added.
+ *
+ * @param in string to calculate the escaped length for.
+ * @param inlen length of the input string, if < 0 strlen will be used to check the length.
+ * @param[in] quote the quotation character.
+ * @return the size of buffer required to hold the escaped string including the NUL byte.
+ */
+size_t fr_prints_len(char const *in, ssize_t inlen, char quote)
+{
+ return fr_prints(NULL, 0, in, inlen, quote) + 1;
+}
+
+/** Escape string that may contain binary data, and write it to a new buffer
+ *
+ * This is useful in situations where we expect printable strings as input,
+ * but under some conditions may get binary data. A good example is libldap
+ * and the arrays of struct berval ldap_get_values_len returns.
+ *
+ * @param[in] ctx To allocate new buffer in.
+ * @param[in] in String to escape.
+ * @param[in] inlen Length of string. Should be >= 0 if the data may contain
+ * embedded \0s. Must be >= 0 if data may not be \0 terminated.
+ * If < 0 inlen will be calculated using strlen.
+ * @param[in] quote the quotation character.
+ * @return new buffer holding the escaped string.
+ */
+char *fr_aprints(TALLOC_CTX *ctx, char const *in, ssize_t inlen, char quote)
+{
+ size_t len, ret;
+ char *out;
+
+ len = fr_prints_len(in, inlen, quote);
+
+ out = talloc_array(ctx, char, len);
+ ret = fr_prints(out, len, in, inlen, quote);
+
+ /*
+ * This is a fatal error, but fr_assert is the strongest
+ * assert we're allowed to use in library functions.
+ */
+ if (!fr_assert(ret == (len - 1))) {
+ talloc_free(out);
+ return NULL;
+ }
+
+ return out;
+}
+
+/** Print the value of an attribute to a string
+ *
+ * @param[out] out Where to write the string.
+ * @param[in] outlen Size of outlen (must be at least 3 bytes).
+ * @param[in] vp to print.
+ * @param[in] quote Char to add before and after printed value, if 0 no char will be added, if < 0 raw string will be
+ * added.
+ * @return the length of data written to out, or a value >= outlen on truncation.
+ */
+size_t vp_prints_value(char *out, size_t outlen, VALUE_PAIR const *vp, char quote)
+{
+ VERIFY_VP(vp);
+
+ if (vp->type == VT_XLAT) {
+ return snprintf(out, outlen, "%c%s%c", quote, vp->value.xlat, quote);
+ }
+
+ return value_data_prints(out, outlen, vp->da->type, vp->da, &vp->data, vp->vp_length, quote);
+}
+
+/** Print one attribute value to a string
+ *
+ * @param ctx to allocate string in.
+ * @param vp to print.
+ * @param[in] quote the quotation character
+ * @return a talloced buffer with the attribute operator and value.
+ */
+char *vp_aprints_value(TALLOC_CTX *ctx, VALUE_PAIR const *vp, char quote)
+{
+ VERIFY_VP(vp);
+
+ if (vp->type == VT_XLAT) {
+ return fr_aprints(ctx, vp->value.xlat, talloc_array_length(vp->value.xlat) - 1, quote);
+ }
+
+ return value_data_aprints(ctx, vp->da->type, vp->da, &vp->data, vp->vp_length, quote);
+}
+
+char *vp_aprints_type(TALLOC_CTX *ctx, PW_TYPE type)
+{
+ switch (type) {
+ case PW_TYPE_STRING :
+ return talloc_typed_strdup(ctx, "_");
+
+ case PW_TYPE_INTEGER64:
+ case PW_TYPE_SIGNED:
+ case PW_TYPE_BYTE:
+ case PW_TYPE_SHORT:
+ case PW_TYPE_INTEGER:
+ case PW_TYPE_DATE :
+ return talloc_typed_strdup(ctx, "0");
+
+ case PW_TYPE_IPV4_ADDR :
+ return talloc_typed_strdup(ctx, "?.?.?.?");
+
+ case PW_TYPE_IPV4_PREFIX:
+ return talloc_typed_strdup(ctx, "?.?.?.?/?");
+
+ case PW_TYPE_IPV6_ADDR:
+ return talloc_typed_strdup(ctx, "[:?:]");
+
+ case PW_TYPE_IPV6_PREFIX:
+ return talloc_typed_strdup(ctx, "[:?:]/?");
+
+ case PW_TYPE_OCTETS:
+ return talloc_typed_strdup(ctx, "??");
+
+ case PW_TYPE_ETHERNET:
+ return talloc_typed_strdup(ctx, "??:??:??:??:??:??:??:??");
+
+#ifdef WITH_ASCEND_BINARY
+ case PW_TYPE_ABINARY:
+ return talloc_typed_strdup(ctx, "??");
+#endif
+
+ default :
+ break;
+ }
+
+ return talloc_typed_strdup(ctx, "<UNKNOWN-TYPE>");
+}
+
+/** Prints attribute enumv escaped suitably for use as JSON enumv
+ *
+ * Returns < 0 if the buffer may be (or have been) too small to write the encoded
+ * JSON value to.
+ *
+ * @param out Where to write the string.
+ * @param outlen Length of output buffer.
+ * @param vp to print.
+ * @param raw_value if true, the raw value is printed and not the enumerated attribute value
+ * @return the length of data written to out, or a value >= outlen on truncation.
+ */
+size_t vp_prints_value_json(char *out, size_t outlen, VALUE_PAIR const *vp, bool raw_value)
+{
+ char const *q;
+ size_t len, freespace = outlen;
+ /* attempt to print raw_value when has_value is false, or raw_value is false, but only
+ if has_tag is also false */
+ bool raw = (raw_value || !vp->da->flags.has_value) && !vp->da->flags.has_tag;
+
+ if (raw) {
+ switch (vp->da->type) {
+ case PW_TYPE_INTEGER:
+ return snprintf(out, freespace, "%u", vp->vp_integer);
+
+ case PW_TYPE_SHORT:
+ return snprintf(out, freespace, "%u", (unsigned int) vp->vp_short);
+
+ case PW_TYPE_BYTE:
+ return snprintf(out, freespace, "%u", (unsigned int) vp->vp_byte);
+
+ default:
+ break;
+ }
+ }
+
+ /* Indicate truncation */
+ if (freespace < 2) return outlen + 1;
+ *out++ = '"';
+ freespace--;
+
+ switch (vp->da->type) {
+ case PW_TYPE_STRING:
+ for (q = vp->vp_strvalue; q < vp->vp_strvalue + vp->vp_length; q++) {
+ /* Indicate truncation */
+ if (freespace < 3) return outlen + 1;
+
+ if (*q == '"') {
+ *out++ = '\\';
+ *out++ = '"';
+ freespace -= 2;
+ } else if (*q == '\\') {
+ *out++ = '\\';
+ *out++ = '\\';
+ freespace -= 2;
+ } else if (*q == '/') {
+ *out++ = '\\';
+ *out++ = '/';
+ freespace -= 2;
+ } else if (*q >= ' ') {
+ *out++ = *q;
+ freespace--;
+ } else {
+ *out++ = '\\';
+ freespace--;
+
+ switch (*q) {
+ case '\b':
+ *out++ = 'b';
+ freespace--;
+ break;
+
+ case '\f':
+ *out++ = 'f';
+ freespace--;
+ break;
+
+ case '\n':
+ *out++ = 'n';
+ freespace--;
+ break;
+
+ case '\r':
+ *out++ = 'r';
+ freespace--;
+ break;
+
+ case '\t':
+ *out++ = 't';
+ freespace--;
+ break;
+ default:
+ len = snprintf(out, freespace, "u%04X", (uint8_t) *q);
+ if (is_truncated(len, freespace)) return (outlen - freespace) + len;
+ out += len;
+ freespace -= len;
+ }
+ }
+ }
+ break;
+
+ default:
+ len = vp_prints_value(out, freespace, vp, 0);
+ if (is_truncated(len, freespace)) return (outlen - freespace) + len;
+ out += len;
+ freespace -= len;
+ break;
+ }
+
+ /* Indicate truncation */
+ if (freespace < 2) return outlen + 1;
+ *out++ = '"';
+ freespace--;
+ *out = '\0'; // We don't increment out, because the nul byte should not be included in the length
+
+ return outlen - freespace;
+}
+
+/*
+ * This is a hack, and has to be kept in sync with tokens.h
+ */
+static char const *vp_tokens[] = {
+ "?", /* T_INVALID */
+ "EOL", /* T_EOL */
+ "{",
+ "}",
+ "(",
+ ")",
+ ",",
+ ";",
+ "++",
+ "+=",
+ "-=",
+ ":=",
+ "=",
+ "!=",
+ ">=",
+ ">",
+ "<=",
+ "<",
+ "=~",
+ "!~",
+ "=*",
+ "!*",
+ "==",
+ "#",
+ "<BARE-WORD>",
+ "<\"STRING\">",
+ "<'STRING'>",
+ "<`STRING`>"
+};
+
+/** Print one attribute and value to a string
+ *
+ * Print a VALUE_PAIR in the format:
+@verbatim
+ <attribute_name>[:tag] <op> <value>
+@endverbatim
+ * to a string.
+ *
+ * @param out Where to write the string.
+ * @param outlen Length of output buffer.
+ * @param vp to print.
+ * @return the length of data written to out, or a value >= outlen on truncation.
+ */
+size_t vp_prints(char *out, size_t outlen, VALUE_PAIR const *vp)
+{
+ char const *token = NULL;
+ size_t len, freespace = outlen;
+
+ if (!out) return 0;
+
+ *out = '\0';
+ if (!vp || !vp->da) return 0;
+
+ VERIFY_VP(vp);
+
+ if ((vp->op > T_INVALID) && (vp->op < T_TOKEN_LAST)) {
+ token = vp_tokens[vp->op];
+ } else {
+ token = "<INVALID-TOKEN>";
+ }
+
+ if (vp->da->flags.has_tag && (vp->tag != TAG_ANY)) {
+ len = snprintf(out, freespace, "%s:%d %s ", vp->da->name, vp->tag, token);
+ } else {
+ len = snprintf(out, freespace, "%s %s ", vp->da->name, token);
+ }
+
+ if (is_truncated(len, freespace)) return len;
+ out += len;
+ freespace -= len;
+
+ len = vp_prints_value(out, freespace, vp, '"');
+ if (is_truncated(len, freespace)) return (outlen - freespace) + len;
+ freespace -= len;
+
+ return (outlen - freespace);
+}
+
+/** Print one attribute and value to FP
+ *
+ * Complete string with '\\t' and '\\n' is written to buffer before printing to
+ * avoid issues when running with multiple threads.
+ *
+ * @param fp to output to.
+ * @param vp to print.
+ */
+void vp_print(FILE *fp, VALUE_PAIR const *vp)
+{
+ char buf[1024];
+ char *p = buf;
+ size_t len;
+
+ VERIFY_VP(vp);
+
+ *p++ = '\t';
+ len = vp_prints(p, sizeof(buf) - 1, vp);
+ if (!len) {
+ return;
+ }
+ p += len;
+
+ /*
+ * Deal with truncation gracefully
+ */
+ if (((size_t) (p - buf)) >= (sizeof(buf) - 2)) {
+ p = buf + (sizeof(buf) - 2);
+ }
+
+ *p++ = '\n';
+ *p = '\0';
+
+ fputs(buf, fp);
+}
+
+
+/** Print a list of attributes and enumv
+ *
+ * @param fp to output to.
+ * @param const_vp to print.
+ */
+void vp_printlist(FILE *fp, VALUE_PAIR const *const_vp)
+{
+ VALUE_PAIR *vp;
+ vp_cursor_t cursor;
+
+ memcpy(&vp, &const_vp, sizeof(vp)); /* const work-arounds */
+
+ for (vp = fr_cursor_init(&cursor, &vp); vp; vp = fr_cursor_next(&cursor)) {
+ vp_print(fp, vp);
+ }
+}
+
+/** Print one attribute and value to a string
+ *
+ * Print a VALUE_PAIR in the format:
+@verbatim
+ <attribute_name>[:tag] <op> <value>
+@endverbatim
+ * to a string.
+ *
+ * @param ctx to allocate string in.
+ * @param vp to print.
+ * @param[in] quote the quotation character
+ * @return a talloced buffer with the attribute operator and value.
+ */
+char *vp_aprints(TALLOC_CTX *ctx, VALUE_PAIR const *vp, char quote)
+{
+ char const *token = NULL;
+ char *str, *value;
+
+ if (!vp || !vp->da) return 0;
+
+ VERIFY_VP(vp);
+
+ if ((vp->op > T_INVALID) && (vp->op < T_TOKEN_LAST)) {
+ token = vp_tokens[vp->op];
+ } else {
+ token = "<INVALID-TOKEN>";
+ }
+
+ value = vp_aprints_value(ctx, vp, quote);
+
+ if (vp->da->flags.has_tag && (vp->tag != TAG_ANY)) {
+ if (quote && (vp->da->type == PW_TYPE_STRING)) {
+ str = talloc_asprintf(ctx, "%s:%d %s %c%s%c", vp->da->name, vp->tag, token, quote, value, quote);
+ } else {
+ str = talloc_asprintf(ctx, "%s:%d %s %s", vp->da->name, vp->tag, token, value);
+ }
+ } else {
+ if (quote && (vp->da->type == PW_TYPE_STRING)) {
+ str = talloc_asprintf(ctx, "%s %s %c%s%c", vp->da->name, token, quote, value, quote);
+ } else {
+ str = talloc_asprintf(ctx, "%s %s %s", vp->da->name, token, value);
+ }
+ }
+
+ talloc_free(value);
+
+ return str;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 19:33:52 +0000