mirror of https://github.com/bol-van/zapret/
bolvan
6 years ago
15 changed files with 434 additions and 14 deletions
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@ -0,0 +1,32 @@ |
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#
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include $(TOPDIR)/rules.mk |
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PKG_NAME:=ip2net |
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PKG_RELEASE:=1 |
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include $(INCLUDE_DIR)/package.mk |
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define Package/ip2net |
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SECTION:=net |
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CATEGORY:=Network |
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TITLE:=ip2net |
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SUBMENU:=Zapret |
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endef |
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define Build/Prepare |
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mkdir -p $(PKG_BUILD_DIR) |
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$(CP) ./ip2net/* $(PKG_BUILD_DIR)/ |
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endef |
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define Build/Compile |
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$(MAKE) -C $(PKG_BUILD_DIR) $(TARGET_CONFIGURE_OPTS) |
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endef |
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define Package/ip2net/install |
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$(INSTALL_DIR) $(1)/opt/zapret/ip2net |
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$(INSTALL_BIN) $(PKG_BUILD_DIR)/ip2net $(1)/opt/zapret/ip2net |
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endef |
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$(eval $(call BuildPackage,ip2net)) |
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@ -0,0 +1 @@ |
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Copy "ip2net" folder here ! |
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@ -0,0 +1,12 @@ |
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CC ?= gcc |
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CFLAGS += -s |
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LIBS = |
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SRC_FILES = *.c |
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all: ip2net |
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ip2net: $(SRC_FILES) |
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$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS) |
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clean: |
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rm -f ip2net *.o |
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@ -0,0 +1,93 @@ |
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// group ip list from stdout into subnets
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// ip list must be pre-uniqued
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "qsort.h" |
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#define ALLOC_STEP 16384 |
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#define PCTMULT 3/4 |
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typedef unsigned int uint; |
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typedef unsigned char uchar; |
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int ucmp (const void * a,const void * b, void *arg) |
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{ |
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if (*(uint*)a < *(uint*)b) |
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return -1; |
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else if (*(uint*)a > *(uint*)b) |
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return 1; |
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else |
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return 0; |
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} |
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uint mask_from_bitcount(uint zct) |
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{ |
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return ~((1<<zct)-1); |
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} |
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int main() |
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{ |
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uint u1,u2,u3,u4,ip; |
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uint ipct=0,iplist_size=0,*iplist=NULL,*iplist_new; |
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uint pos=0,p; |
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uint i,zct,subnet_ct,end_ip; |
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while (!feof(stdin)) |
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if (scanf("%u.%u.%u.%u",&u1,&u2,&u3,&u4)==4 && !(u1 & 0xFFFFFF00) && !(u2 & 0xFFFFFF00) && !(u3 & 0xFFFFFF00) && !(u4 & 0xFFFFFF00)) |
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{ |
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ip = u1<<24 | u2<<16 | u3<<8 | u4; |
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if (ipct>=iplist_size) |
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{ |
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iplist_size += ALLOC_STEP; |
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iplist_new = (uint*)(iplist ? realloc(iplist,sizeof(*iplist)*iplist_size) : malloc(sizeof(*iplist)*iplist_size)); |
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if (!iplist_new) |
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{ |
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free(iplist); |
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fprintf(stderr,"out of memory\n"); |
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return 100; |
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} |
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iplist = iplist_new; |
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} |
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iplist[ipct++]= ip; |
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} |
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gnu_quicksort(iplist,ipct,sizeof(*iplist),ucmp,NULL); |
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while(pos<ipct) |
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{ |
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uchar subnet_ok=0; |
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uint mask,ip_start,ip_end,ip_ct,subnet_ct,pos_end; |
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for(zct=10, pos_end=pos+1 ; zct>=2 ; zct--) |
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{ |
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mask = mask_from_bitcount(zct); |
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ip_start = iplist[pos] & mask; |
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subnet_ct = ~mask+1; |
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if (iplist[pos]>(ip_start+subnet_ct*PCTMULT)) continue; |
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ip_end = ip_start | ~mask; |
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for(p=pos, ip_ct=0 ; p<ipct && iplist[p]<=ip_end; p++) ip_ct++; |
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if (ip_ct>=(subnet_ct*PCTMULT)) |
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{ |
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subnet_ok=1; |
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pos_end = p; |
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break; |
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} |
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} |
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if (!subnet_ok) zct=0,ip_start=iplist[pos]; |
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u1 = ip_start>>24; |
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u2 = (ip_start>>16) & 0xFF; |
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u3 = (ip_start>>8) & 0xFF; |
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u4 = ip_start & 0xFF; |
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if (zct) |
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printf("%u.%u.%u.%u/%u\n",u1,u2,u3,u4,32-zct); |
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else |
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printf("%u.%u.%u.%u\n",u1,u2,u3,u4); |
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pos = pos_end; |
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} |
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free(iplist); |
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return 0; |
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} |
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@ -0,0 +1,250 @@ |
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/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library. |
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Written by Douglas C. Schmidt (schmidt@ics.uci.edu). |
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The GNU C Library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with the GNU C Library; if not, see |
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<http://www.gnu.org/licenses/>. */
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/* If you consider tuning this algorithm, you should consult first:
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Engineering a sort function; Jon Bentley and M. Douglas McIlroy; |
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Software - Practice and Experience; Vol. 23 (11), 1249-1265, 1993. */ |
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//#include <alloca.h>
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#include <limits.h> |
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#include <stdlib.h> |
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//#include <string.h>
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#include "qsort.h" |
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/* Byte-wise swap two items of size SIZE. */ |
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#define SWAP(a, b, size) \ |
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do \ |
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{ \ |
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size_t __size = (size); \ |
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char *__a = (a), *__b = (b); \ |
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do \ |
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{ \ |
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char __tmp = *__a; \ |
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*__a++ = *__b; \ |
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*__b++ = __tmp; \ |
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} while (--__size > 0); \ |
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} while (0) |
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/* Discontinue quicksort algorithm when partition gets below this size.
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This particular magic number was chosen to work best on a Sun 4/260. */ |
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#define MAX_THRESH 4 |
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/* Stack node declarations used to store unfulfilled partition obligations. */ |
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typedef struct |
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{ |
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char *lo; |
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char *hi; |
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} stack_node; |
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/* The next 4 #defines implement a very fast in-line stack abstraction. */ |
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/* The stack needs log (total_elements) entries (we could even subtract
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log(MAX_THRESH)). Since total_elements has type size_t, we get as |
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upper bound for log (total_elements): |
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bits per byte (CHAR_BIT) * sizeof(size_t). */ |
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#define STACK_SIZE (CHAR_BIT * sizeof(size_t)) |
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#define PUSH(low, high) ((void) ((top->lo = (low)), (top->hi = (high)), ++top)) |
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#define POP(low, high) ((void) (--top, (low = top->lo), (high = top->hi))) |
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#define STACK_NOT_EMPTY (stack < top) |
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/* Order size using quicksort. This implementation incorporates
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four optimizations discussed in Sedgewick: |
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1. Non-recursive, using an explicit stack of pointer that store the |
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next array partition to sort. To save time, this maximum amount |
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of space required to store an array of SIZE_MAX is allocated on the |
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stack. Assuming a 32-bit (64 bit) integer for size_t, this needs |
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only 32 * sizeof(stack_node) == 256 bytes (for 64 bit: 1024 bytes). |
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Pretty cheap, actually. |
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2. Chose the pivot element using a median-of-three decision tree. |
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This reduces the probability of selecting a bad pivot value and |
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eliminates certain extraneous comparisons. |
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3. Only quicksorts TOTAL_ELEMS / MAX_THRESH partitions, leaving |
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insertion sort to order the MAX_THRESH items within each partition. |
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This is a big win, since insertion sort is faster for small, mostly |
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sorted array segments. |
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4. The larger of the two sub-partitions is always pushed onto the |
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stack first, with the algorithm then concentrating on the |
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smaller partition. This *guarantees* no more than log (total_elems) |
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stack size is needed (actually O(1) in this case)! */ |
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void |
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gnu_quicksort (void *const pbase, size_t total_elems, size_t size, |
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__gnu_compar_d_fn_t cmp, void *arg) |
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{ |
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char *base_ptr = (char *) pbase; |
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const size_t max_thresh = MAX_THRESH * size; |
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if (total_elems == 0) |
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/* Avoid lossage with unsigned arithmetic below. */ |
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return; |
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if (total_elems > MAX_THRESH) |
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{ |
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char *lo = base_ptr; |
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char *hi = &lo[size * (total_elems - 1)]; |
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stack_node stack[STACK_SIZE]; |
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stack_node *top = stack; |
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PUSH (NULL, NULL); |
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while (STACK_NOT_EMPTY) |
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{ |
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char *left_ptr; |
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char *right_ptr; |
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/* Select median value from among LO, MID, and HI. Rearrange
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LO and HI so the three values are sorted. This lowers the |
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probability of picking a pathological pivot value and |
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skips a comparison for both the LEFT_PTR and RIGHT_PTR in |
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the while loops. */ |
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char *mid = lo + size * ((hi - lo) / size >> 1); |
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if ((*cmp) ((void *) mid, (void *) lo, arg) < 0) |
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SWAP (mid, lo, size); |
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if ((*cmp) ((void *) hi, (void *) mid, arg) < 0) |
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SWAP (mid, hi, size); |
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else |
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goto jump_over; |
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if ((*cmp) ((void *) mid, (void *) lo, arg) < 0) |
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SWAP (mid, lo, size); |
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jump_over:; |
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left_ptr = lo + size; |
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right_ptr = hi - size; |
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/* Here's the famous ``collapse the walls'' section of quicksort.
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Gotta like those tight inner loops! They are the main reason |
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that this algorithm runs much faster than others. */ |
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do |
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{ |
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while ((*cmp) ((void *) left_ptr, (void *) mid, arg) < 0) |
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left_ptr += size; |
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while ((*cmp) ((void *) mid, (void *) right_ptr, arg) < 0) |
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right_ptr -= size; |
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if (left_ptr < right_ptr) |
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{ |
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SWAP (left_ptr, right_ptr, size); |
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if (mid == left_ptr) |
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mid = right_ptr; |
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else if (mid == right_ptr) |
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mid = left_ptr; |
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left_ptr += size; |
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right_ptr -= size; |
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} |
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else if (left_ptr == right_ptr) |
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{ |
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left_ptr += size; |
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right_ptr -= size; |
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break; |
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} |
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} |
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while (left_ptr <= right_ptr); |
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/* Set up pointers for next iteration. First determine whether
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left and right partitions are below the threshold size. If so, |
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ignore one or both. Otherwise, push the larger partition's |
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bounds on the stack and continue sorting the smaller one. */ |
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if ((size_t) (right_ptr - lo) <= max_thresh) |
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{ |
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if ((size_t) (hi - left_ptr) <= max_thresh) |
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/* Ignore both small partitions. */ |
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POP (lo, hi); |
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else |
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/* Ignore small left partition. */ |
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lo = left_ptr; |
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} |
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else if ((size_t) (hi - left_ptr) <= max_thresh) |
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/* Ignore small right partition. */ |
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hi = right_ptr; |
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else if ((right_ptr - lo) > (hi - left_ptr)) |
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{ |
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/* Push larger left partition indices. */ |
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PUSH (lo, right_ptr); |
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lo = left_ptr; |
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} |
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else |
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{ |
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/* Push larger right partition indices. */ |
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PUSH (left_ptr, hi); |
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hi = right_ptr; |
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} |
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} |
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} |
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/* Once the BASE_PTR array is partially sorted by quicksort the rest
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is completely sorted using insertion sort, since this is efficient |
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for partitions below MAX_THRESH size. BASE_PTR points to the beginning |
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of the array to sort, and END_PTR points at the very last element in |
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the array (*not* one beyond it!). */ |
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#define min(x, y) ((x) < (y) ? (x) : (y)) |
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{ |
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char *const end_ptr = &base_ptr[size * (total_elems - 1)]; |
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char *tmp_ptr = base_ptr; |
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char *thresh = min(end_ptr, base_ptr + max_thresh); |
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char *run_ptr; |
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/* Find smallest element in first threshold and place it at the
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array's beginning. This is the smallest array element, |
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and the operation speeds up insertion sort's inner loop. */ |
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for (run_ptr = tmp_ptr + size; run_ptr <= thresh; run_ptr += size) |
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if ((*cmp) ((void *) run_ptr, (void *) tmp_ptr, arg) < 0) |
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tmp_ptr = run_ptr; |
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if (tmp_ptr != base_ptr) |
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SWAP (tmp_ptr, base_ptr, size); |
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/* Insertion sort, running from left-hand-side up to right-hand-side. */ |
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run_ptr = base_ptr + size; |
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while ((run_ptr += size) <= end_ptr) |
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{ |
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tmp_ptr = run_ptr - size; |
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while ((*cmp) ((void *) run_ptr, (void *) tmp_ptr, arg) < 0) |
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tmp_ptr -= size; |
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tmp_ptr += size; |
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if (tmp_ptr != run_ptr) |
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{ |
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char *trav; |
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trav = run_ptr + size; |
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while (--trav >= run_ptr) |
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{ |
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char c = *trav; |
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char *hi, *lo; |
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for (hi = lo = trav; (lo -= size) >= tmp_ptr; hi = lo) |
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*hi = *lo; |
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*hi = c; |
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} |
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} |
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} |
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} |
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} |
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@ -0,0 +1,6 @@ |
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#pragma once |
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// GNU qsort is 2x faster than musl
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typedef int (*__gnu_compar_d_fn_t) (const void *, const void *, void *); |
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void gnu_quicksort (void *const pbase, size_t total_elems, size_t size, __gnu_compar_d_fn_t cmp, void *arg); |
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