+++ /dev/null
-From d559314e3e3debe1ff8c2c1372701df6154a53ef Mon Sep 17 00:00:00 2001
-From: Steven Barth <steven@midlink.org>
-Date: Mon, 15 Dec 2014 10:13:39 +0100
-Subject: [PATCH 2/3] build: make nftables usable with mini-gmp
-
-libgmp usually compiles to >400KB which can put a burden on embedded
-device firmware especially if libgmp isn't used for other purposes.
-mini-gmp in contrast adds only ~30KB to the nft-binary itself.
-
-However mini-gmp does not support gmp_sscanf and gmp_printf.
-
-This patch:
-* Adds a configure flag --without-libgmp to select mini-gmp
-* Replaces the single gmp_sscanf occurence with mpz_set_str
-* Replaces calls to gmp_printf outside of pr_debug with
- a minimalistic mpz_printf usable to format one mpz_t
-* Replaces gmp_vasprintf in erec_vcreate with vasprintf
- and rewrites the single user of the gmp format-flags
-* Changes the parser token VERSION to IPHDRVERSION to avoid
- clashes with the VERSION-define in config.h
-
-Signed-off-by: Steven Barth <cyrus@openwrt.org>
----
- configure.ac | 17 ++++++++++++++---
- include/expression.h | 2 +-
- include/gmputil.h | 10 ++++++++++
- include/utils.h | 3 +--
- src/Makefile.am | 4 ++++
- src/ct.c | 2 +-
- src/datatype.c | 8 +++-----
- src/erec.c | 6 +++++-
- src/evaluate.c | 8 ++++++--
- src/gmputil.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++-
- src/parser_bison.y | 6 +++---
- src/scanner.l | 2 +-
- 12 files changed, 102 insertions(+), 20 deletions(-)
-
-diff --git a/configure.ac b/configure.ac
-index b55b2b1..1e3729d 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -73,8 +73,18 @@ AM_CONDITIONAL([BUILD_PDF], [test "$DBLATEX" == "found"])
- PKG_CHECK_MODULES([LIBMNL], [libmnl >= 1.0.3])
- PKG_CHECK_MODULES([LIBNFTNL], [libnftnl >= 1.0.2])
-
--AC_CHECK_LIB([gmp], [__gmpz_init], ,
-- AC_MSG_ERROR([No suitable version of libgmp found]))
-+AC_ARG_WITH([libgmp], [AS_HELP_STRING([--without-libgmp],
-+ [Disable libgmp support (use builtin mini-gmp)])], [],
-+ [with_libgmp=yes])
-+AS_IF([test "x$with_libgmp" != xno], [
-+AC_CHECK_LIB([gmp],[__gmpz_init], , AC_MSG_ERROR([No suitable version of libgmp found]))
-+])
-+AM_CONDITIONAL([BUILD_MINIGMP], [test "x$with_libgmp" == xno])
-+
-+
-+AS_IF([test "x$with_libgmp" != xyes -a "x$CONFIG_DEBUG" = xy], [
-+AC_MSG_ERROR([--without-libgmp MUST be used with --disable-debug])
-+])
-
- AC_ARG_WITH([cli], [AS_HELP_STRING([--without-cli],
- [disable interactive CLI (libreadline support)])],
-@@ -130,4 +140,5 @@ AC_OUTPUT
- echo "
- nft configuration:
- cli support: ${with_cli}
-- enable debugging: ${with_debug}"
-+ enable debugging: ${with_debug}
-+ use shared libgmp: ${with_libgmp}"
-diff --git a/include/expression.h b/include/expression.h
-index 4b96879..7477c3e 100644
---- a/include/expression.h
-+++ b/include/expression.h
-@@ -2,7 +2,7 @@
- #define NFTABLES_EXPRESSION_H
-
- #include <stdbool.h>
--#include <gmp.h>
-+#include <gmputil.h>
- #include <linux/netfilter/nf_tables.h>
-
- #include <nftables.h>
-diff --git a/include/gmputil.h b/include/gmputil.h
-index 63eb0ba..b9ced6d 100644
---- a/include/gmputil.h
-+++ b/include/gmputil.h
-@@ -1,9 +1,17 @@
- #ifndef NFTABLES_GMPUTIL_H
- #define NFTABLES_GMPUTIL_H
-
-+#include <config.h>
-+
-+#ifdef HAVE_LIBGMP
- #include <gmp.h>
-+#else
-+#include <mini-gmp.h>
-+#endif
-+
- #include <asm/byteorder.h>
-
-+
- enum mpz_word_order {
- MPZ_MSWF = 1,
- MPZ_LSWF = -1,
-@@ -48,4 +56,6 @@ extern void mpz_import_data(mpz_t rop, const void *data,
- unsigned int len);
- extern void mpz_switch_byteorder(mpz_t rop, unsigned int len);
-
-+extern int mpz_printf(const char *format, const mpz_t value);
-+
- #endif /* NFTABLES_GMPUTIL_H */
-diff --git a/include/utils.h b/include/utils.h
-index 15b2e39..3c436ba 100644
---- a/include/utils.h
-+++ b/include/utils.h
-@@ -9,14 +9,13 @@
- #include <unistd.h>
- #include <assert.h>
- #include <list.h>
--#include <gmp.h>
-
- #define BITS_PER_BYTE 8
-
- #ifdef DEBUG
- #define pr_debug(fmt, arg...) gmp_printf(fmt, ##arg)
- #else
--#define pr_debug(fmt, arg...) ({ if (false) gmp_printf(fmt, ##arg); 0; })
-+#define pr_debug(fmt, arg...) ({ if (false) {}; 0; })
- #endif
-
- #define __fmtstring(x, y) __attribute__((format(printf, x, y)))
-diff --git a/src/Makefile.am b/src/Makefile.am
-index 378424d..099052a 100644
---- a/src/Makefile.am
-+++ b/src/Makefile.am
-@@ -51,4 +51,8 @@ if BUILD_CLI
- nft_SOURCES += cli.c
- endif
-
-+if BUILD_MINIGMP
-+nft_SOURCES += mini-gmp.c
-+endif
-+
- nft_LDADD = ${LIBMNL_LIBS} ${LIBNFTNL_LIBS}
-diff --git a/src/ct.c b/src/ct.c
-index 2eb85ea..759e65d 100644
---- a/src/ct.c
-+++ b/src/ct.c
-@@ -110,7 +110,7 @@ static void ct_label_type_print(const struct expr *expr)
- return;
- }
- /* can happen when connlabel.conf is altered after rules were added */
-- gmp_printf("0x%Zx", expr->value);
-+ mpz_printf("0x%Zx", expr->value);
- }
-
- static struct error_record *ct_label_type_parse(const struct expr *sym,
-diff --git a/src/datatype.c b/src/datatype.c
-index 4519d87..40ce898 100644
---- a/src/datatype.c
-+++ b/src/datatype.c
-@@ -186,7 +186,7 @@ void symbol_table_print(const struct symbol_table *tbl,
-
- static void invalid_type_print(const struct expr *expr)
- {
-- gmp_printf("0x%Zx [invalid type]", expr->value);
-+ mpz_printf("0x%Zx [invalid type]", expr->value);
- }
-
- const struct datatype invalid_type = {
-@@ -268,18 +268,16 @@ static void integer_type_print(const struct expr *expr)
-
- if (expr->dtype->basefmt != NULL)
- fmt = expr->dtype->basefmt;
-- gmp_printf(fmt, expr->value);
-+ mpz_printf(fmt, expr->value);
- }
-
- static struct error_record *integer_type_parse(const struct expr *sym,
- struct expr **res)
- {
- mpz_t v;
-- int len;
-
- mpz_init(v);
-- if (gmp_sscanf(sym->identifier, "%Zu%n", v, &len) != 1 ||
-- (int)strlen(sym->identifier) != len) {
-+ if (mpz_set_str(v, sym->identifier, 0)) {
- mpz_clear(v);
- return error(&sym->location, "Could not parse %s",
- sym->dtype->desc);
-diff --git a/src/erec.c b/src/erec.c
-index 82543e6..810e9bf 100644
---- a/src/erec.c
-+++ b/src/erec.c
-@@ -44,6 +44,7 @@ static void erec_destroy(struct error_record *erec)
- xfree(erec);
- }
-
-+__attribute__((format(printf, 3, 0)))
- struct error_record *erec_vcreate(enum error_record_types type,
- const struct location *loc,
- const char *fmt, va_list ap)
-@@ -55,10 +56,13 @@ struct error_record *erec_vcreate(enum error_record_types type,
- erec->num_locations = 0;
- erec_add_location(erec, loc);
-
-- gmp_vasprintf(&erec->msg, fmt, ap);
-+ if (vasprintf(&erec->msg, fmt, ap) < 0)
-+ erec->msg = NULL;
-+
- return erec;
- }
-
-+__attribute__((format(printf, 3, 4)))
- struct error_record *erec_create(enum error_record_types type,
- const struct location *loc,
- const char *fmt, ...)
-diff --git a/src/evaluate.c b/src/evaluate.c
-index 0732660..3cb5cca 100644
---- a/src/evaluate.c
-+++ b/src/evaluate.c
-@@ -232,9 +232,13 @@ static int expr_evaluate_value(struct eval_ctx *ctx, struct expr **expr)
- case TYPE_INTEGER:
- mpz_init_bitmask(mask, ctx->ectx.len);
- if (mpz_cmp((*expr)->value, mask) > 0) {
-+ char *valstr = mpz_get_str(NULL, 10, (*expr)->value);
-+ char *rangestr = mpz_get_str(NULL, 10, mask);
- expr_error(ctx->msgs, *expr,
-- "Value %Zu exceeds valid range 0-%Zu",
-- (*expr)->value, mask);
-+ "Value %s exceeds valid range 0-%s",
-+ valstr, rangestr);
-+ free(valstr);
-+ free(rangestr);
- mpz_clear(mask);
- return -1;
- }
-diff --git a/src/gmputil.c b/src/gmputil.c
-index cb46445..acbf369 100644
---- a/src/gmputil.c
-+++ b/src/gmputil.c
-@@ -14,7 +14,6 @@
- #include <stdio.h>
- #include <unistd.h>
- #include <string.h>
--#include <gmp.h>
-
- #include <nftables.h>
- #include <datatype.h>
-@@ -148,6 +147,59 @@ void mpz_switch_byteorder(mpz_t rop, unsigned int len)
- mpz_import_data(rop, data, BYTEORDER_HOST_ENDIAN, len);
- }
-
-+int mpz_printf(const char *f, const mpz_t value)
-+{
-+ /* minimalistic gmp_printf replacement to format a single mpz_t
-+ * using only mini-gmp functions */
-+ int n = 0;
-+ while (*f) {
-+ if (*f != '%') {
-+ if (fputc(*f, stdout) != *f)
-+ return -1;
-+
-+ ++n;
-+ } else {
-+ unsigned long prec = 0;
-+ int base;
-+ size_t len;
-+ char *str;
-+ bool ok;
-+
-+ if (*++f == '.')
-+ prec = strtoul(++f, (char**)&f, 10);
-+
-+ if (*f++ != 'Z')
-+ return -1;
-+
-+ if (*f == 'u')
-+ base = 10;
-+ else if (*f == 'x')
-+ base = 16;
-+ else
-+ return -1;
-+
-+ len = mpz_sizeinbase(value, base);
-+ while (prec-- > len) {
-+ if (fputc('0', stdout) != '0')
-+ return -1;
-+
-+ ++n;
-+ }
-+
-+ str = mpz_get_str(NULL, base, value);
-+ ok = str && fwrite(str, 1, len, stdout) == len;
-+ free(str);
-+
-+ if (!ok)
-+ return -1;
-+
-+ n += len;
-+ }
-+ ++f;
-+ }
-+ return n;
-+}
-+
- static void *gmp_xrealloc(void *ptr, size_t old_size, size_t new_size)
- {
- return xrealloc(ptr, new_size);
-diff --git a/src/parser_bison.y b/src/parser_bison.y
-index 99dbd08..eb5cf90 100644
---- a/src/parser_bison.y
-+++ b/src/parser_bison.y
-@@ -237,7 +237,7 @@ static void location_update(struct location *loc, struct location *rhs, int n)
- %token OPERATION "operation"
-
- %token IP "ip"
--%token VERSION "version"
-+%token IPHDRVERSION "version"
- %token HDRLENGTH "hdrlength"
- %token TOS "tos"
- %token LENGTH "length"
-@@ -1947,7 +1947,7 @@ ip_hdr_expr : IP ip_hdr_field
- }
- ;
-
--ip_hdr_field : VERSION { $$ = IPHDR_VERSION; }
-+ip_hdr_field : IPHDRVERSION { $$ = IPHDR_VERSION; }
- | HDRLENGTH { $$ = IPHDR_HDRLENGTH; }
- | TOS { $$ = IPHDR_TOS; }
- | LENGTH { $$ = IPHDR_LENGTH; }
-@@ -1994,7 +1994,7 @@ ip6_hdr_expr : IP6 ip6_hdr_field
- }
- ;
-
--ip6_hdr_field : VERSION { $$ = IP6HDR_VERSION; }
-+ip6_hdr_field : IPHDRVERSION { $$ = IP6HDR_VERSION; }
- | PRIORITY { $$ = IP6HDR_PRIORITY; }
- | FLOWLABEL { $$ = IP6HDR_FLOWLABEL; }
- | LENGTH { $$ = IP6HDR_LENGTH; }
-diff --git a/src/scanner.l b/src/scanner.l
-index ed87da6..92b6a10 100644
---- a/src/scanner.l
-+++ b/src/scanner.l
-@@ -349,7 +349,7 @@ addrstring ({macaddr}|{ip4addr}|{ip6addr})
- "operation" { return OPERATION; }
-
- "ip" { return IP; }
--"version" { return VERSION; }
-+"version" { return IPHDRVERSION; }
- "hdrlength" { return HDRLENGTH; }
- "tos" { return TOS; }
- "length" { return LENGTH; }
---
-2.1.3
-
projects / openwrt / staging / lynxis / omap.git / blobdiff