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owipcalc: separate in client and lib 

Separate owipcalc in client and lib part. Owipcalc brings a lot of nice
functionality with it, e.g. parsing and calculating prefixes.

Signed-off-by: Nick Hainke <vincent@systemli.org>
lilik-openwrt-22.03
Nick Hainke 4 years ago
committed by Polynomdivision
parent
aafbe8bcf1
commit
686f919194
4 changed files with 425 additions and 348 deletions
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  1. +29
    -2
      net/owipcalc/Makefile
  2. +279
    -0
      net/owipcalc/src/main.c
  3. +35
    -346
      net/owipcalc/src/owipcalc.c
  4. +82
    -0
      net/owipcalc/src/owipcalc.h

+ 29
- 2
net/owipcalc/Makefile View File

@ -12,12 +12,12 @@ PKG_LICENSE:=Apache-2.0
include $(INCLUDE_DIR)/package.mk
define Package/owipcalc
SECTION:=utils
CATEGORY:=Utilities
TITLE:=Simple IPv4/IPv6 address calculator
MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
DEPENDS:=+libowipcalc
endef
define Package/owipcalc/description
@ -27,18 +27,45 @@ define Package/owipcalc/description
for dhcp pools.
endef
define Package/libowipcalc
SECTION:=libs
CATEGORY:=Libraries
TITLE:=Owipcalc Library
endef
define Package/libowipcalc/description
The owipcalc library supports a number of calculations and tests to work
with ip-address ranges, this is useful for programms that e.g. need to
partition ipv6-prefixes into small subnets or to calculate address ranges
for dhcp pools.
endef
define Build/Configure
endef
define Build/Compile
$(TARGET_CC) $(TARGET_CFLAGS) \
-o $(PKG_BUILD_DIR)/owipcalc $(PKG_BUILD_DIR)/owipcalc.c
-shared -fPIC -o $(PKG_BUILD_DIR)/libowipcalc.so $(PKG_BUILD_DIR)/owipcalc.c
$(TARGET_CC) $(TARGET_CFLAGS) \
-o $(PKG_BUILD_DIR)/owipcalc $(PKG_BUILD_DIR)/main.c -L$(PKG_BUILD_DIR)/ -lowipcalc
endef
define Build/InstallDev
$(INSTALL_DIR) $(1)/usr/include/
$(CP) $(PKG_BUILD_DIR)/owipcalc.h $(1)/usr/include/
$(INSTALL_DIR) $(1)/usr/lib
$(INSTALL_BIN) $(PKG_BUILD_DIR)/libowipcalc.so $(1)/usr/lib/libowipcalc.so
endef
define Package/owipcalc/install
$(INSTALL_DIR) $(1)/usr/bin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/owipcalc $(1)/usr/bin/owipcalc
endef
define Package/libowipcalc/install
$(INSTALL_DIR) $(1)/usr/lib
$(INSTALL_BIN) $(PKG_BUILD_DIR)/libowipcalc.so $(1)/usr/lib/libowipcalc.so
endef
$(eval $(call BuildPackage,libowipcalc))
$(eval $(call BuildPackage,owipcalc))

+ 279
- 0
net/owipcalc/src/main.c View File

@ -0,0 +1,279 @@
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include "owipcalc.h"
struct op {
const char *name;
const char *desc;
struct {
bool (*a1)(struct cidr *a);
bool (*a2)(struct cidr *a, struct cidr *b);
} f4;
struct {
bool (*a1)(struct cidr *a);
bool (*a2)(struct cidr *a, struct cidr *b);
} f6;
};
struct op ops[] = {
{ .name = "add",
.desc = "Add argument to base address",
.f4.a2 = cidr_add4,
.f6.a2 = cidr_add6 },
{ .name = "sub",
.desc = "Substract argument from base address",
.f4.a2 = cidr_sub4,
.f6.a2 = cidr_sub6 },
{ .name = "next",
.desc = "Advance base address to next prefix of given size",
.f4.a2 = cidr_next4,
.f6.a2 = cidr_next6 },
{ .name = "prev",
.desc = "Lower base address to previous prefix of give size",
.f4.a2 = cidr_prev4,
.f6.a2 = cidr_prev6 },
{ .name = "network",
.desc = "Turn base address into network address",
.f4.a1 = cidr_network4,
.f6.a1 = cidr_network6 },
{ .name = "broadcast",
.desc = "Turn base address into broadcast address",
.f4.a1 = cidr_broadcast4 },
{ .name = "prefix",
.desc = "Set the prefix of base address to argument",
.f4.a2 = cidr_prefix,
.f6.a2 = cidr_prefix },
{ .name = "netmask",
.desc = "Calculate netmask of base address",
.f4.a1 = cidr_netmask4 },
{ .name = "6to4",
.desc = "Calculate 6to4 prefix of given ipv4-address",
.f4.a1 = cidr_6to4 },
{ .name = "howmany",
.desc = "Print amount of righ-hand prefixes that fit into base address",
.f4.a2 = cidr_howmany,
.f6.a2 = cidr_howmany },
{ .name = "contains",
.desc = "Print '1' if argument fits into base address or '0' if not",
.f4.a2 = cidr_contains4,
.f6.a2 = cidr_contains6 },
{ .name = "private",
.desc = "Print '1' if base address is in RFC1918 private space or '0' "
"if not",
.f4.a1 = cidr_private4 },
{ .name = "linklocal",
.desc = "Print '1' if base address is in 169.254.0.0/16 or FE80::/10 "
"link local space or '0' if not",
.f4.a1 = cidr_linklocal4,
.f6.a1 = cidr_linklocal6 },
{ .name = "ula",
.desc = "Print '1' if base address is in FC00::/7 unique local address "
"(ULA) space or '0' if not",
.f6.a1 = cidr_ula6 },
{ .name = "quiet",
.desc = "Suppress output, useful for test operation where the result can "
"be inferred from the exit code",
.f4.a1 = cidr_quiet,
.f6.a1 = cidr_quiet },
{ .name = "pop",
.desc = "Pop intermediate result from stack",
.f4.a1 = cidr_pop,
.f6.a1 = cidr_pop },
{ .name = "print",
.desc = "Print intermediate result and pop it from stack, invoked "
"implicitely at the end of calculation if no intermediate prints "
"happened",
.f4.a1 = cidr_print4,
.f6.a1 = cidr_print6 },
};
static void usage(const char *prog)
{
int i;
fprintf(stderr,
"\n"
"Usage:\n\n"
" %s {base address} operation [argument] "
"[operation [argument] ...]\n\n"
"Operations:\n\n",
prog);
for (i = 0; i < sizeof(ops) / sizeof(ops[0]); i++)
{
if (ops[i].f4.a2 || ops[i].f6.a2)
{
fprintf(stderr, " %s %s\n",
ops[i].name,
(ops[i].f4.a2 && ops[i].f6.a2) ? "{ipv4/ipv6/amount}" :
(ops[i].f6.a2 ? "{ipv6/amount}" : "{ipv4/amount}"));
}
else
{
fprintf(stderr, " %s\n", ops[i].name);
}
fprintf(stderr, " %s.\n", ops[i].desc);
if ((ops[i].f4.a1 && ops[i].f6.a1) || (ops[i].f4.a2 && ops[i].f6.a2))
fprintf(stderr, " Applicable to ipv4- and ipv6-addresses.\n\n");
else if (ops[i].f6.a2 || ops[i].f6.a1)
fprintf(stderr, " Only applicable to ipv6-addresses.\n\n");
else
fprintf(stderr, " Only applicable to ipv4-addresses.\n\n");
}
fprintf(stderr,
"Examples:\n\n"
" Calculate a DHCP range:\n\n"
" $ %s 192.168.1.1/255.255.255.0 network add 100 print add 150 print\n"
" 192.168.1.100\n"
" 192.168.1.250\n\n"
" Count number of prefixes:\n\n"
" $ %s 2001:0DB8:FDEF::/48 howmany ::/64\n"
" 65536\n\n",
prog, prog);
exit(1);
}
static bool runop(char ***arg, int *status)
{
int i;
char *arg1 = **arg;
char *arg2 = *(*arg+1);
struct cidr *a = stack;
struct cidr *b = NULL;
if (!arg1)
return false;
for (i = 0; i < sizeof(ops) / sizeof(ops[0]); i++)
{
if (!strcmp(ops[i].name, arg1))
{
if (ops[i].f4.a2 || ops[i].f6.a2)
{
if (!arg2)
{
fprintf(stderr, "'%s' requires an argument\n",
ops[i].name);
*status = 2;
return false;
}
b = cidr_parse(ops[i].name, arg2, a->family);
if (!b)
{
fprintf(stderr, "invalid address argument for '%s'\n",
ops[i].name);
*status = 3;
return false;
}
*arg += 2;
if (((a->family == AF_INET) && !ops[i].f4.a2) ||
((a->family == AF_INET6) && !ops[i].f6.a2))
{
fprintf(stderr, "'%s' not supported for %s addresses\n",
ops[i].name,
(a->family == AF_INET) ? "ipv4" : "ipv6");
*status = 5;
return false;
}
*status = !((a->family == AF_INET) ? ops[i].f4.a2(a, b)
: ops[i].f6.a2(a, b));
return true;
}
else
{
*arg += 1;
if (((a->family == AF_INET) && !ops[i].f4.a1) ||
((a->family == AF_INET6) && !ops[i].f6.a1))
{
fprintf(stderr, "'%s' not supported for %s addresses\n",
ops[i].name,
(a->family == AF_INET) ? "ipv4" : "ipv6");
*status = 5;
return false;
}
*status = !((a->family == AF_INET) ? ops[i].f4.a1(a)
: ops[i].f6.a1(a));
return true;
}
}
}
return false;
}
int main(int argc, char **argv)
{
int status = 0;
char **arg = argv+2;
struct cidr *a;
// enable printing
quiet = false;
if (argc < 3)
usage(argv[0]);
a = strchr(argv[1], ':') ? cidr_parse6(argv[1]) : cidr_parse4(argv[1]);
if (!a)
usage(argv[0]);
cidr_push(a);
while (runop(&arg, &status));
if (*arg)
{
fprintf(stderr, "unknown operation '%s'\n", *arg);
exit(6);
}
if (!printed && (status < 2))
{
if (stack->family == AF_INET)
cidr_print4(stack);
else
cidr_print6(stack);
}
qprintf("\n");
exit(status);
}

+ 35
- 346
net/owipcalc/src/owipcalc.c View File

@ -1,72 +1,18 @@
/*
* owipcalc - OpenWrt IP Calculator
*
* Copyright (C) 2012 Jo-Philipp Wich <jo@mein.io>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include "owipcalc.h"
bool quiet = true;
bool printed = false;
struct cidr *stack = NULL;
struct cidr {
uint8_t family;
uint32_t prefix;
union {
struct in_addr v4;
struct in6_addr v6;
} addr;
union {
char v4[sizeof("255.255.255.255/255.255.255.255 ")];
char v6[sizeof("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255/128 ")];
} buf;
struct cidr *next;
};
struct op {
const char *name;
const char *desc;
struct {
bool (*a1)(struct cidr *a);
bool (*a2)(struct cidr *a, struct cidr *b);
} f4;
struct {
bool (*a1)(struct cidr *a);
bool (*a2)(struct cidr *a, struct cidr *b);
} f6;
};
static bool quiet = false;
static bool printed = false;
static struct cidr *stack = NULL;
#define qprintf(...) \
do { \
if (!quiet) printf(__VA_ARGS__); \
printed = true; \
} while(0)
static void cidr_push(struct cidr *a)
void cidr_push(struct cidr *a)
{
if (a)
{
@ -75,7 +21,7 @@ static void cidr_push(struct cidr *a)
}
}
static bool cidr_pop(struct cidr *a)
bool cidr_pop(struct cidr *a)
{
struct cidr *old = stack;
@ -107,7 +53,7 @@ static struct cidr * cidr_clone(struct cidr *a)
}
static struct cidr * cidr_parse4(const char *s)
struct cidr * cidr_parse4(const char *s)
{
char *p = NULL, *r;
struct in_addr mask;
@ -159,7 +105,7 @@ err:
return NULL;
}
static bool cidr_add4(struct cidr *a, struct cidr *b)
bool cidr_add4(struct cidr *a, struct cidr *b)
{
uint32_t x = ntohl(a->addr.v4.s_addr);
uint32_t y = ntohl(b->addr.v4.s_addr);
@ -179,7 +125,7 @@ static bool cidr_add4(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_sub4(struct cidr *a, struct cidr *b)
bool cidr_sub4(struct cidr *a, struct cidr *b)
{
uint32_t x = ntohl(a->addr.v4.s_addr);
uint32_t y = ntohl(b->addr.v4.s_addr);
@ -199,7 +145,7 @@ static bool cidr_sub4(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_network4(struct cidr *a)
bool cidr_network4(struct cidr *a)
{
struct cidr *n = cidr_clone(a);
@ -209,7 +155,7 @@ static bool cidr_network4(struct cidr *a)
return true;
}
static bool cidr_broadcast4(struct cidr *a)
bool cidr_broadcast4(struct cidr *a)
{
struct cidr *n = cidr_clone(a);
@ -219,7 +165,7 @@ static bool cidr_broadcast4(struct cidr *a)
return true;
}
static bool cidr_contains4(struct cidr *a, struct cidr *b)
bool cidr_contains4(struct cidr *a, struct cidr *b)
{
uint32_t net1 = a->addr.v4.s_addr & htonl(~((1 << (32 - a->prefix)) - 1));
uint32_t net2 = b->addr.v4.s_addr & htonl(~((1 << (32 - a->prefix)) - 1));
@ -239,7 +185,7 @@ static bool cidr_contains4(struct cidr *a, struct cidr *b)
}
}
static bool cidr_netmask4(struct cidr *a)
bool cidr_netmask4(struct cidr *a)
{
struct cidr *n = cidr_clone(a);
@ -249,7 +195,7 @@ static bool cidr_netmask4(struct cidr *a)
return true;
}
static bool cidr_private4(struct cidr *a)
bool cidr_private4(struct cidr *a)
{
uint32_t x = ntohl(a->addr.v4.s_addr);
@ -270,7 +216,7 @@ static bool cidr_private4(struct cidr *a)
}
}
static bool cidr_linklocal4(struct cidr *a)
bool cidr_linklocal4(struct cidr *a)
{
uint32_t x = ntohl(a->addr.v4.s_addr);
@ -289,7 +235,7 @@ static bool cidr_linklocal4(struct cidr *a)
}
}
static bool cidr_prev4(struct cidr *a, struct cidr *b)
bool cidr_prev4(struct cidr *a, struct cidr *b)
{
struct cidr *n = cidr_clone(a);
@ -299,7 +245,7 @@ static bool cidr_prev4(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_next4(struct cidr *a, struct cidr *b)
bool cidr_next4(struct cidr *a, struct cidr *b)
{
struct cidr *n = cidr_clone(a);
@ -309,7 +255,7 @@ static bool cidr_next4(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_6to4(struct cidr *a)
bool cidr_6to4(struct cidr *a)
{
struct cidr *n = cidr_clone(a);
uint32_t x = a->addr.v4.s_addr;
@ -329,7 +275,7 @@ static bool cidr_6to4(struct cidr *a)
return true;
}
static bool cidr_print4(struct cidr *a)
bool cidr_print4(struct cidr *a)
{
char *p;
@ -353,7 +299,7 @@ static bool cidr_print4(struct cidr *a)
}
static struct cidr * cidr_parse6(const char *s)
struct cidr * cidr_parse6(const char *s)
{
char *p = NULL, *r;
struct cidr *addr = malloc(sizeof(struct cidr));
@ -393,7 +339,7 @@ err:
return NULL;
}
static bool cidr_add6(struct cidr *a, struct cidr *b)
bool cidr_add6(struct cidr *a, struct cidr *b)
{
uint8_t idx = 15, carry = 0, overflow = 0;
@ -420,7 +366,7 @@ static bool cidr_add6(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_sub6(struct cidr *a, struct cidr *b)
bool cidr_sub6(struct cidr *a, struct cidr *b)
{
uint8_t idx = 15, carry = 0, underflow = 0;
@ -447,7 +393,7 @@ static bool cidr_sub6(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_prev6(struct cidr *a, struct cidr *b)
bool cidr_prev6(struct cidr *a, struct cidr *b)
{
uint8_t idx, carry = 1, underflow = 0;
struct cidr *n = cidr_clone(a);
@ -479,7 +425,7 @@ static bool cidr_prev6(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_next6(struct cidr *a, struct cidr *b)
bool cidr_next6(struct cidr *a, struct cidr *b)
{
uint8_t idx, carry = 1, overflow = 0;
struct cidr *n = cidr_clone(a);
@ -511,7 +457,7 @@ static bool cidr_next6(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_network6(struct cidr *a)
bool cidr_network6(struct cidr *a)
{
uint8_t i;
struct cidr *n = cidr_clone(a);
@ -525,7 +471,7 @@ static bool cidr_network6(struct cidr *a)
return true;
}
static bool cidr_contains6(struct cidr *a, struct cidr *b)
bool cidr_contains6(struct cidr *a, struct cidr *b)
{
struct in6_addr *x = &a->addr.v6;
struct in6_addr *y = &b->addr.v6;
@ -551,7 +497,7 @@ static bool cidr_contains6(struct cidr *a, struct cidr *b)
}
}
static bool cidr_linklocal6(struct cidr *a)
bool cidr_linklocal6(struct cidr *a)
{
if (printed)
qprintf(" ");
@ -570,7 +516,7 @@ static bool cidr_linklocal6(struct cidr *a)
}
}
static bool cidr_ula6(struct cidr *a)
bool cidr_ula6(struct cidr *a)
{
if (printed)
qprintf(" ");
@ -588,7 +534,7 @@ static bool cidr_ula6(struct cidr *a)
}
}
static bool cidr_print6(struct cidr *a)
bool cidr_print6(struct cidr *a)
{
char *p;
@ -612,7 +558,7 @@ static bool cidr_print6(struct cidr *a)
}
static struct cidr * cidr_parse(const char *op, const char *s, int af_hint)
struct cidr * cidr_parse(const char *op, const char *s, int af_hint)
{
char *r;
struct cidr *a;
@ -668,7 +614,7 @@ static struct cidr * cidr_parse(const char *op, const char *s, int af_hint)
return a;
}
static bool cidr_howmany(struct cidr *a, struct cidr *b)
bool cidr_howmany(struct cidr *a, struct cidr *b)
{
if (printed)
qprintf(" ");
@ -681,271 +627,14 @@ static bool cidr_howmany(struct cidr *a, struct cidr *b)
return true;
}
static bool cidr_prefix(struct cidr *a, struct cidr *b)
bool cidr_prefix(struct cidr *a, struct cidr *b)
{
a->prefix = b->prefix;
return true;
}
static bool cidr_quiet(struct cidr *a)
bool cidr_quiet(struct cidr *a)
{
quiet = true;
return true;
}
struct op ops[] = {
{ .name = "add",
.desc = "Add argument to base address",
.f4.a2 = cidr_add4,
.f6.a2 = cidr_add6 },
{ .name = "sub",
.desc = "Substract argument from base address",
.f4.a2 = cidr_sub4,
.f6.a2 = cidr_sub6 },
{ .name = "next",
.desc = "Advance base address to next prefix of given size",
.f4.a2 = cidr_next4,
.f6.a2 = cidr_next6 },
{ .name = "prev",
.desc = "Lower base address to previous prefix of give size",
.f4.a2 = cidr_prev4,
.f6.a2 = cidr_prev6 },
{ .name = "network",
.desc = "Turn base address into network address",
.f4.a1 = cidr_network4,
.f6.a1 = cidr_network6 },
{ .name = "broadcast",
.desc = "Turn base address into broadcast address",
.f4.a1 = cidr_broadcast4 },
{ .name = "prefix",
.desc = "Set the prefix of base address to argument",
.f4.a2 = cidr_prefix,
.f6.a2 = cidr_prefix },
{ .name = "netmask",
.desc = "Calculate netmask of base address",
.f4.a1 = cidr_netmask4 },
{ .name = "6to4",
.desc = "Calculate 6to4 prefix of given ipv4-address",
.f4.a1 = cidr_6to4 },
{ .name = "howmany",
.desc = "Print amount of righ-hand prefixes that fit into base address",
.f4.a2 = cidr_howmany,
.f6.a2 = cidr_howmany },
{ .name = "contains",
.desc = "Print '1' if argument fits into base address or '0' if not",
.f4.a2 = cidr_contains4,
.f6.a2 = cidr_contains6 },
{ .name = "private",
.desc = "Print '1' if base address is in RFC1918 private space or '0' "
"if not",
.f4.a1 = cidr_private4 },
{ .name = "linklocal",
.desc = "Print '1' if base address is in 169.254.0.0/16 or FE80::/10 "
"link local space or '0' if not",
.f4.a1 = cidr_linklocal4,
.f6.a1 = cidr_linklocal6 },
{ .name = "ula",
.desc = "Print '1' if base address is in FC00::/7 unique local address "
"(ULA) space or '0' if not",
.f6.a1 = cidr_ula6 },
{ .name = "quiet",
.desc = "Suppress output, useful for test operation where the result can "
"be inferred from the exit code",
.f4.a1 = cidr_quiet,
.f6.a1 = cidr_quiet },
{ .name = "pop",
.desc = "Pop intermediate result from stack",
.f4.a1 = cidr_pop,
.f6.a1 = cidr_pop },
{ .name = "print",
.desc = "Print intermediate result and pop it from stack, invoked "
"implicitely at the end of calculation if no intermediate prints "
"happened",
.f4.a1 = cidr_print4,
.f6.a1 = cidr_print6 },
};
static void usage(const char *prog)
{
int i;
fprintf(stderr,
"\n"
"Usage:\n\n"
" %s {base address} operation [argument] "
"[operation [argument] ...]\n\n"
"Operations:\n\n",
prog);
for (i = 0; i < sizeof(ops) / sizeof(ops[0]); i++)
{
if (ops[i].f4.a2 || ops[i].f6.a2)
{
fprintf(stderr, " %s %s\n",
ops[i].name,
(ops[i].f4.a2 && ops[i].f6.a2) ? "{ipv4/ipv6/amount}" :
(ops[i].f6.a2 ? "{ipv6/amount}" : "{ipv4/amount}"));
}
else
{
fprintf(stderr, " %s\n", ops[i].name);
}
fprintf(stderr, " %s.\n", ops[i].desc);
if ((ops[i].f4.a1 && ops[i].f6.a1) || (ops[i].f4.a2 && ops[i].f6.a2))
fprintf(stderr, " Applicable to ipv4- and ipv6-addresses.\n\n");
else if (ops[i].f6.a2 || ops[i].f6.a1)
fprintf(stderr, " Only applicable to ipv6-addresses.\n\n");
else
fprintf(stderr, " Only applicable to ipv4-addresses.\n\n");
}
fprintf(stderr,
"Examples:\n\n"
" Calculate a DHCP range:\n\n"
" $ %s 192.168.1.1/255.255.255.0 network add 100 print add 150 print\n"
" 192.168.1.100\n"
" 192.168.1.250\n\n"
" Count number of prefixes:\n\n"
" $ %s 2001:0DB8:FDEF::/48 howmany ::/64\n"
" 65536\n\n",
prog, prog);
exit(1);
}
static bool runop(char ***arg, int *status)
{
int i;
char *arg1 = **arg;
char *arg2 = *(*arg+1);
struct cidr *a = stack;
struct cidr *b = NULL;
if (!arg1)
return false;
for (i = 0; i < sizeof(ops) / sizeof(ops[0]); i++)
{
if (!strcmp(ops[i].name, arg1))
{
if (ops[i].f4.a2 || ops[i].f6.a2)
{
if (!arg2)
{
fprintf(stderr, "'%s' requires an argument\n",
ops[i].name);
*status = 2;
return false;
}
b = cidr_parse(ops[i].name, arg2, a->family);
if (!b)
{
fprintf(stderr, "invalid address argument for '%s'\n",
ops[i].name);
*status = 3;
return false;
}
*arg += 2;
if (((a->family == AF_INET) && !ops[i].f4.a2) ||
((a->family == AF_INET6) && !ops[i].f6.a2))
{
fprintf(stderr, "'%s' not supported for %s addresses\n",
ops[i].name,
(a->family == AF_INET) ? "ipv4" : "ipv6");
*status = 5;
return false;
}
*status = !((a->family == AF_INET) ? ops[i].f4.a2(a, b)
: ops[i].f6.a2(a, b));
return true;
}
else
{
*arg += 1;
if (((a->family == AF_INET) && !ops[i].f4.a1) ||
((a->family == AF_INET6) && !ops[i].f6.a1))
{
fprintf(stderr, "'%s' not supported for %s addresses\n",
ops[i].name,
(a->family == AF_INET) ? "ipv4" : "ipv6");
*status = 5;
return false;
}
*status = !((a->family == AF_INET) ? ops[i].f4.a1(a)
: ops[i].f6.a1(a));
return true;
}
}
}
return false;
}
int main(int argc, char **argv)
{
int status = 0;
char **arg = argv+2;
struct cidr *a;
if (argc < 3)
usage(argv[0]);
a = strchr(argv[1], ':') ? cidr_parse6(argv[1]) : cidr_parse4(argv[1]);
if (!a)
usage(argv[0]);
cidr_push(a);
while (runop(&arg, &status));
if (*arg)
{
fprintf(stderr, "unknown operation '%s'\n", *arg);
exit(6);
}
if (!printed && (status < 2))
{
if (stack->family == AF_INET)
cidr_print4(stack);
else
cidr_print6(stack);
}
qprintf("\n");
exit(status);
}

+ 82
- 0
net/owipcalc/src/owipcalc.h View File

@ -0,0 +1,82 @@
/*
* owipcalc - OpenWrt IP Calculator
*
* Copyright (C) 2012 Jo-Philipp Wich <jo@mein.io>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __OWIPCALC_H__
#define __OWIPCALC_H__
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <arpa/inet.h>
#define qprintf(...) \
do { \
if (!quiet) printf(__VA_ARGS__); \
printed = true; \
} while(0)
struct cidr {
uint8_t family;
uint32_t prefix;
union {
struct in_addr v4;
struct in6_addr v6;
} addr;
union {
char v4[sizeof("255.255.255.255/255.255.255.255 ")];
char v6[sizeof("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255/128 ")];
} buf;
struct cidr *next;
};
void cidr_push(struct cidr *a);
bool cidr_pop(struct cidr *a);
struct cidr * cidr_parse4(const char *s);
bool cidr_add4(struct cidr *a, struct cidr *b);
bool cidr_sub4(struct cidr *a, struct cidr *b);
bool cidr_network4(struct cidr *a);
bool cidr_broadcast4(struct cidr *a);
bool cidr_contains4(struct cidr *a, struct cidr *b);
bool cidr_netmask4(struct cidr *a);
bool cidr_private4(struct cidr *a);
bool cidr_linklocal4(struct cidr *a);
bool cidr_prev4(struct cidr *a, struct cidr *b);
bool cidr_next4(struct cidr *a, struct cidr *b);
bool cidr_6to4(struct cidr *a);
bool cidr_print4(struct cidr *a);
struct cidr * cidr_parse6(const char *s);
bool cidr_add6(struct cidr *a, struct cidr *b);
bool cidr_sub6(struct cidr *a, struct cidr *b);
bool cidr_prev6(struct cidr *a, struct cidr *b);
bool cidr_next6(struct cidr *a, struct cidr *b);
bool cidr_network6(struct cidr *a);
bool cidr_contains6(struct cidr *a, struct cidr *b);
bool cidr_linklocal6(struct cidr *a);
bool cidr_ula6(struct cidr *a);
bool cidr_print6(struct cidr *a);
struct cidr * cidr_parse(const char *op, const char *s, int af_hint);
bool cidr_howmany(struct cidr *a, struct cidr *b);
bool cidr_prefix(struct cidr *a, struct cidr *b);
bool cidr_quiet(struct cidr *a);
extern struct cidr *stack;
extern bool quiet;
extern bool printed;
#endif

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