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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 16:28:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 16:28:20 +0000 |
commit | dcc721a95bef6f0d8e6d8775b8efe33e5aecd562 (patch) | |
tree | 66a2774cd0ee294d019efd71d2544c70f42b2842 /plugins/mmanon | |
parent | Initial commit. (diff) | |
download | rsyslog-dcc721a95bef6f0d8e6d8775b8efe33e5aecd562.tar.xz rsyslog-dcc721a95bef6f0d8e6d8775b8efe33e5aecd562.zip |
Adding upstream version 8.2402.0.upstream/8.2402.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plugins/mmanon')
-rw-r--r-- | plugins/mmanon/Makefile.am | 8 | ||||
-rw-r--r-- | plugins/mmanon/Makefile.in | 797 | ||||
-rw-r--r-- | plugins/mmanon/mmanon.c | 1375 |
3 files changed, 2180 insertions, 0 deletions
diff --git a/plugins/mmanon/Makefile.am b/plugins/mmanon/Makefile.am new file mode 100644 index 0000000..98f0da2 --- /dev/null +++ b/plugins/mmanon/Makefile.am @@ -0,0 +1,8 @@ +pkglib_LTLIBRARIES = mmanon.la + +mmanon_la_SOURCES = mmanon.c +mmanon_la_CPPFLAGS = $(RSRT_CFLAGS) $(PTHREADS_CFLAGS) +mmanon_la_LDFLAGS = -module -avoid-version +mmanon_la_LIBADD = + +EXTRA_DIST = diff --git a/plugins/mmanon/Makefile.in b/plugins/mmanon/Makefile.in new file mode 100644 index 0000000..e3fc686 --- /dev/null +++ b/plugins/mmanon/Makefile.in @@ -0,0 +1,797 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +am__is_gnu_make = { \ + if test -z '$(MAKELEVEL)'; then \ + false; \ + elif test -n '$(MAKE_HOST)'; then \ + true; \ + elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \ + true; \ + else \ + false; \ + fi; \ +} +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; \ + *) echo "am__make_running_with_option: internal error: invalid" \ + "target option '$${target_option-}' specified" >&2; \ + exit 1;; \ + esac; \ + has_opt=no; \ + sane_makeflags=$$MAKEFLAGS; \ + if $(am__is_gnu_make); then \ + sane_makeflags=$$MFLAGS; \ + else \ + case $$MAKEFLAGS in \ + *\\[\ \ ]*) \ + bs=\\; \ + sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \ + | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \ + esac; \ + fi; \ + skip_next=no; \ + strip_trailopt () \ + { \ + flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \ + }; \ + for flg in $$sane_makeflags; do \ + test $$skip_next = yes && { skip_next=no; continue; }; \ + case $$flg in \ + *=*|--*) continue;; \ + -*I) strip_trailopt 'I'; skip_next=yes;; \ + -*I?*) strip_trailopt 'I';; \ + -*O) strip_trailopt 'O'; skip_next=yes;; \ + -*O?*) strip_trailopt 'O';; \ + -*l) strip_trailopt 'l'; skip_next=yes;; \ + -*l?*) strip_trailopt 'l';; \ + -[dEDm]) skip_next=yes;; \ + -[JT]) skip_next=yes;; \ + esac; \ + case $$flg in \ + *$$target_option*) has_opt=yes; break;; \ + esac; \ + done; \ + test $$has_opt = yes +am__make_dryrun = (target_option=n; $(am__make_running_with_option)) +am__make_keepgoing = (target_option=k; $(am__make_running_with_option)) +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = plugins/mmanon +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/m4/ac_check_define.m4 \ + $(top_srcdir)/m4/atomic_operations.m4 \ + $(top_srcdir)/m4/atomic_operations_64bit.m4 \ + $(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \ + $(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \ + $(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/configure.ac +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = $(top_builddir)/config.h +CONFIG_CLEAN_FILES = +CONFIG_CLEAN_VPATH_FILES = +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; +am__vpath_adj = case $$p in \ + $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \ + *) f=$$p;; \ + esac; +am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`; +am__install_max = 40 +am__nobase_strip_setup = \ + srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'` +am__nobase_strip = \ + for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||" +am__nobase_list = $(am__nobase_strip_setup); \ + for p in $$list; do echo "$$p $$p"; done | \ + sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \ + $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \ + if (++n[$$2] == $(am__install_max)) \ + { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \ + END { for (dir in files) print dir, files[dir] }' +am__base_list = \ + sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \ + sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g' +am__uninstall_files_from_dir = { \ + test -z "$$files" \ + || { test ! 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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 "config.h" +#include "rsyslog.h" +#include <stdio.h> +#include <ctype.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <signal.h> +#include <errno.h> +#include <unistd.h> +#include <stdint.h> +#include "conf.h" +#include "syslogd-types.h" +#include "srUtils.h" +#include "template.h" +#include "module-template.h" +#include "errmsg.h" +#include "parserif.h" +#include "hashtable.h" + + + +MODULE_TYPE_OUTPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("mmanon") + + +DEF_OMOD_STATIC_DATA + +/* config variables */ + +// enumerator for the mode +enum mode {ZERO, RANDOMINT, SIMPLE}; + +union node { + struct { + union node* more; + union node* less; + } pointer; + struct { + char ip_high[16]; + char ip_low[16]; + } ips; +}; + +struct ipv6_int { + unsigned long long high; + unsigned long long low; + }; +/* define operation modes we have */ +#define SIMPLE_MODE 0 /* just overwrite */ +#define REWRITE_MODE 1 /* rewrite IP address, canoninized */ +typedef struct _instanceData { + struct { + sbool enable; + int8_t bits; + union node* Root; + int randConsis; + enum mode mode; + uchar replaceChar; + } ipv4; + + struct { + sbool enable; + uint8_t bits; + enum mode anonmode; + int randConsis; + struct hashtable* hash; + } ipv6; + + struct { + sbool enable; + uint8_t bits; + enum mode anonmode; + int randConsis; + struct hashtable* hash; + } embeddedIPv4; +} instanceData; + +typedef struct wrkrInstanceData { + instanceData *pData; + unsigned randstatus; +} wrkrInstanceData_t; + +struct modConfData_s { + rsconf_t *pConf; /* our overall config object */ +}; +static modConfData_t *loadModConf = NULL;/* modConf ptr to use for the current load process */ +static modConfData_t *runModConf = NULL;/* modConf ptr to use for the current exec process */ + + +/* tables for interfacing with the v6 config system */ +/* action (instance) parameters */ +static struct cnfparamdescr actpdescr[] = { + { "ipv4.enable", eCmdHdlrBinary, 0 }, + { "ipv4.mode", eCmdHdlrGetWord, 0 }, + { "mode", eCmdHdlrGetWord, 0 }, + { "ipv4.bits", eCmdHdlrPositiveInt, 0 }, + { "ipv4.replacechar", eCmdHdlrGetChar, 0}, + { "replacementchar", eCmdHdlrGetChar, 0}, + { "ipv6.enable", eCmdHdlrBinary, 0 }, + { "ipv6.anonmode", eCmdHdlrGetWord, 0 }, + { "ipv6.bits", eCmdHdlrPositiveInt, 0 }, + { "embeddedipv4.enable", eCmdHdlrBinary, 0 }, + { "embeddedipv4.anonmode", eCmdHdlrGetWord, 0 }, + { "embeddedipv4.bits", eCmdHdlrPositiveInt, 0 } +}; +static struct cnfparamblk actpblk = + { CNFPARAMBLK_VERSION, + sizeof(actpdescr)/sizeof(struct cnfparamdescr), + actpdescr + }; + +BEGINbeginCnfLoad +CODESTARTbeginCnfLoad + loadModConf = pModConf; + pModConf->pConf = pConf; +ENDbeginCnfLoad + +BEGINendCnfLoad +CODESTARTendCnfLoad +ENDendCnfLoad + +BEGINcheckCnf +CODESTARTcheckCnf +ENDcheckCnf + +BEGINactivateCnf +CODESTARTactivateCnf + runModConf = pModConf; +ENDactivateCnf + +BEGINfreeCnf +CODESTARTfreeCnf +ENDfreeCnf + + +BEGINcreateInstance +CODESTARTcreateInstance +ENDcreateInstance + +BEGINcreateWrkrInstance +CODESTARTcreateWrkrInstance + pWrkrData->randstatus = time(NULL); +ENDcreateWrkrInstance + + +BEGINisCompatibleWithFeature +CODESTARTisCompatibleWithFeature +ENDisCompatibleWithFeature + + +static void +delTree(union node* node, const int layer) +{ + if(node == NULL){ + return; + } + if(layer == 31){ + free(node); + } else { + delTree(node->pointer.more, layer + 1); + delTree(node->pointer.less, layer + 1); + free(node); + } +} + + +BEGINfreeInstance +CODESTARTfreeInstance + delTree(pData->ipv4.Root, 0); + if(pData->ipv6.hash != NULL) { + hashtable_destroy(pData->ipv6.hash, 1); + } + if(pData->embeddedIPv4.hash != NULL) { + hashtable_destroy(pData->embeddedIPv4.hash, 1); + } +ENDfreeInstance + + +BEGINfreeWrkrInstance +CODESTARTfreeWrkrInstance +ENDfreeWrkrInstance + + +static inline void +setInstParamDefaults(instanceData *pData) +{ + pData->ipv4.enable = 1; + pData->ipv4.bits = 16; + pData->ipv4.Root = NULL; + pData->ipv4.randConsis = 0; + pData->ipv4.mode = ZERO; + pData->ipv4.replaceChar = 'x'; + + pData->ipv6.enable = 1; + pData->ipv6.bits = 96; + pData->ipv6.anonmode = ZERO; + pData->ipv6.randConsis = 0; + pData->ipv6.hash = NULL; + + pData->embeddedIPv4.enable = 1; + pData->embeddedIPv4.bits = 96; + pData->embeddedIPv4.anonmode = ZERO; + pData->embeddedIPv4.randConsis = 0; + pData->embeddedIPv4.hash = NULL; +} + +BEGINnewActInst + struct cnfparamvals *pvals; + int i; +CODESTARTnewActInst + DBGPRINTF("newActInst (mmanon)\n"); + if((pvals = nvlstGetParams(lst, &actpblk, NULL)) == NULL) { + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + CODE_STD_STRING_REQUESTnewActInst(1) + CHKiRet(OMSRsetEntry(*ppOMSR, 0, NULL, OMSR_TPL_AS_MSG)); + CHKiRet(createInstance(&pData)); + setInstParamDefaults(pData); + + for(i = 0 ; i < actpblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(actpblk.descr[i].name, "ipv4.mode") || !strcmp(actpblk.descr[i].name, "mode")) { + if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"zero", + sizeof("zero")-1)) { + pData->ipv4.mode = ZERO; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"random", + sizeof("random")-1)) { + pData->ipv4.mode = RANDOMINT; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"simple", + sizeof("simple")-1) || + !es_strbufcmp(pvals[i].val.d.estr, (uchar*)"rewrite", + sizeof("rewrite")-1)) { + pData->ipv4.mode = SIMPLE; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"random-consistent", + sizeof("random-consistent")-1)) { + pData->ipv4.mode = RANDOMINT; + pData->ipv4.randConsis = 1; + } else { + parser_errmsg("mmanon: configuration error, unknown option for ipv4.mode, " + "will use \"zero\"\n"); + } + } else if(!strcmp(actpblk.descr[i].name, "ipv4.bits")) { + if((int8_t) pvals[i].val.d.n <= 32) { + pData->ipv4.bits = (int8_t) pvals[i].val.d.n; + } else { + pData->ipv4.bits = 32; + parser_errmsg("warning: invalid number of ipv4.bits (%d), corrected " + "to 32", (int) pvals[i].val.d.n); + } + } else if(!strcmp(actpblk.descr[i].name, "ipv4.enable")) { + pData->ipv4.enable = (int) pvals[i].val.d.n; + } else if(!strcmp(actpblk.descr[i].name, "ipv4.replacechar") || !strcmp(actpblk.descr[i].name, + "replacementchar")) { + uchar* tmp = (uchar*) es_str2cstr(pvals[i].val.d.estr, NULL); + pData->ipv4.replaceChar = tmp[0]; + free(tmp); + } else if(!strcmp(actpblk.descr[i].name, "ipv6.enable")) { + pData->ipv6.enable = (int) pvals[i].val.d.n; + } else if(!strcmp(actpblk.descr[i].name, "ipv6.bits")) { + if((uint8_t) pvals[i].val.d.n <= 128) { + pData->ipv6.bits = (uint8_t) pvals[i].val.d.n; + } else { + pData->ipv6.bits = 128; + parser_errmsg("warning: invalid number of ipv6.bits (%d), corrected " + "to 128", (int) pvals[i].val.d.n); + } + } else if(!strcmp(actpblk.descr[i].name, "ipv6.anonmode")) { + if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"zero", + sizeof("zero")-1)) { + pData->ipv6.anonmode = ZERO; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"random", + sizeof("random")-1)) { + pData->ipv6.anonmode = RANDOMINT; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"random-consistent", + sizeof("random-consistent")-1)) { + pData->ipv6.anonmode = RANDOMINT; + pData->ipv6.randConsis = 1; + } else { + parser_errmsg("mmanon: configuration error, unknown option for " + "ipv6.anonmode, will use \"zero\"\n"); + } + } else if(!strcmp(actpblk.descr[i].name, "embeddedipv4.enable")) { + pData->embeddedIPv4.enable = (int) pvals[i].val.d.n; + } else if(!strcmp(actpblk.descr[i].name, "embeddedipv4.bits")) { + if((uint8_t) pvals[i].val.d.n <= 128) { + pData->embeddedIPv4.bits = (uint8_t) pvals[i].val.d.n; + } else { + pData->embeddedIPv4.bits = 128; + parser_errmsg("warning: invalid number of embeddedipv4.bits (%d), " + "corrected to 128", (int) pvals[i].val.d.n); + } + } else if(!strcmp(actpblk.descr[i].name, "embeddedipv4.anonmode")) { + if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"zero", + sizeof("zero")-1)) { + pData->embeddedIPv4.anonmode = ZERO; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"random", + sizeof("random")-1)) { + pData->embeddedIPv4.anonmode = RANDOMINT; + } else if(!es_strbufcmp(pvals[i].val.d.estr, (uchar*)"random-consistent", + sizeof("random-consistent")-1)) { + pData->embeddedIPv4.anonmode = RANDOMINT; + pData->embeddedIPv4.randConsis = 1; + } else { + parser_errmsg("mmanon: configuration error, unknown option for ipv6.anonmode, " + "will use \"zero\"\n"); + } + } else { + parser_errmsg("mmanon: program error, non-handled " + "param '%s'\n", actpblk.descr[i].name); + } + } + + int bHadBitsErr = 0; + if(pData->ipv4.mode == SIMPLE) { + if(pData->ipv4.bits < 8 && pData->ipv4.bits > -1) { + pData->ipv4.bits = 8; + bHadBitsErr = 1; + } else if(pData->ipv4.bits < 16 && pData->ipv4.bits > 8) { + pData->ipv4.bits = 16; + bHadBitsErr = 1; + } else if(pData->ipv4.bits < 24 && pData->ipv4.bits > 16) { + pData->ipv4.bits = 24; + bHadBitsErr = 1; + } else if((pData->ipv4.bits != 32 && pData->ipv4.bits > 24) || pData->ipv4.bits < 0) { + pData->ipv4.bits = 32; + bHadBitsErr = 1; + } + if(bHadBitsErr) { + LogError(0, RS_RET_INVLD_ANON_BITS, + "mmanon: invalid number of ipv4 bits " + "in simple mode, corrected to %d", + pData->ipv4.bits); + } + } + +CODE_STD_FINALIZERnewActInst + cnfparamvalsDestruct(pvals, &actpblk); +ENDnewActInst + + +BEGINdbgPrintInstInfo +CODESTARTdbgPrintInstInfo +ENDdbgPrintInstInfo + + +BEGINtryResume +CODESTARTtryResume +ENDtryResume + + +static int +getHexVal(char c) +{ + if('0' <= c && c <= '9') { + return c - '0'; + } else if('a' <= c && c <= 'f') { + return (c - 'a') + 10; + } else if('A' <= c && c <= 'F') { + return (c - 'A') + 10; + } else { + return -1; + } +} + + +/* returns 1 if valid IPv4 digit, 0 if not */ +static int +isPosByte(const uchar *const __restrict__ buf, + const size_t buflen, + size_t *const __restrict__ nprocessed) +{ + int val = 0; /* Default means no byte found */ + size_t i; + for(i = 0 ; i < buflen; i++) { + if('0' <= buf[i] && buf[i] <= '9') { + /* Maximum 3 digits for single IPv4 Number, we only copy up to 4 numbers + * but process forward to non digits */ + if (i < 4) { + val = val*10 + buf[i]-'0'; + } + } else + break; + } + *nprocessed = i; + /* Return 1 if more than 1 and less the 4 digits and between 0 and 255 */ + if( i > 0 && + i < 4 && + (val >= 0 && val <= 255)) { + return 1; + } else { + return 0; + } +} + +/* 1 - is IPv4, 0 not */ +static int +syntax_ipv4(const uchar *const __restrict__ buf, + const size_t buflen, + size_t *const __restrict__ nprocessed) +{ + size_t nproc = 0; + size_t i; + int r = 0; + if(isPosByte(buf, buflen, &i) == 0) { + goto done; + } + if(i >= buflen || buf[i] != '.') { + goto done; + } + i++; + if(isdigit(buf[i]) == 0 || isPosByte(buf+i, buflen-i, &nproc) == 0) { + goto done; + } + i += nproc; + + if(i >= buflen || buf[i] != '.') { + goto done; + } + i++; + if(isdigit(buf[i]) == 0 || isPosByte(buf+i, buflen-i, &nproc) == 0) { + goto done; + } + i += nproc; + + if(i >= buflen || buf[i] != '.') { + goto done; + } + i++; + if(isdigit(buf[i]) == 0 || isPosByte(buf+i, buflen-i, &nproc) == 0) { + goto done; + } + i += nproc; + + *nprocessed = i; + r = 1; +done: + return r; +} + + +static int +isValidHexNum(const uchar *const __restrict__ buf, + const size_t buflen, + size_t *const __restrict__ nprocessed, + int handleDot) +{ + size_t idx = 0; + int cyc = 0; + + while(idx < buflen) { + switch(buf[idx]) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + + case 'a': + case 'b': + case 'c': + case 'd': + case 'e': + case 'f': + + case 'A': + case 'B': + case 'C': + case 'D': + case 'E': + case 'F': + cyc++; + (*nprocessed)++; + if(cyc == 5) { + goto done; + } + break; + case '.': + if(handleDot && cyc == 0) { + (*nprocessed)++; + cyc = -2; + } + goto done; + case ':': + if(cyc == 0) { + (*nprocessed)++; + cyc = -1; + } + goto done; + default: + goto done; + } + idx++; + } +done: + return cyc; +} + + +static int +syntax_ipv6(const uchar *const __restrict__ buf, + const size_t buflen, + size_t *const __restrict__ nprocessed) +{ + int lastSep = 0; + sbool hadAbbrev = 0; + sbool lastAbbrev = 0; + int ipParts = 0; + int numLen; + int isIP = 0; + + while(*nprocessed < buflen) { + numLen = isValidHexNum(buf + *nprocessed, buflen - *nprocessed, nprocessed, 0); + if(numLen > 0 && numLen < 5) { //found a valid num + if((ipParts == 7 && hadAbbrev) || ipParts > 7) { + isIP = 0; + goto done; + } + if (ipParts == 0 && lastSep && !hadAbbrev) { + isIP = 0; + goto done; + } + lastSep = 0; + lastAbbrev = 0; + ipParts++; + } else if (numLen < 0) { //':' + if(lastSep) { + if(hadAbbrev) { + isIP = 0; + goto done; + } else { + hadAbbrev = 1; + lastAbbrev = 1; + } + } + lastSep = 1; + } else if (numLen == 5) { // maybe truncated with port + if(hadAbbrev && ipParts >= 2) { + isIP = 1; + /* we need to go back 6 chars: + * 5 digits plus leading ":" which designates port! + */ + *nprocessed -= 6; + } else { + isIP = 0; + /* nprocessed need not be corrected - it's only used if isIP == 1 */ + } + goto done; + } else { //no valid num + if(lastSep) { + if(lastAbbrev && ipParts < 8) { + isIP = 1; + goto done; + } + isIP = 0; + goto done; + } + if((ipParts == 8 && !hadAbbrev) || (ipParts < 8 && hadAbbrev)) { + isIP = 1; + goto done; + } else { + isIP = 0; + goto done; + } + } + if(ipParts == 8 && !hadAbbrev) { + isIP = 1; + goto done; + } + } + + if((!lastSep && (ipParts == 8 && !hadAbbrev)) || (ipParts < 8 && hadAbbrev)) { + isIP = 1; + } + +done: + return isIP; +} + + +static unsigned +ipv42num(const char *str) +{ + unsigned num[4] = {0, 0, 0, 0}; + unsigned value = -1; + size_t len = strlen(str); + int cyc = 0; + for(unsigned i = 0 ; i < len ; i++) { + switch(str[i]) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + num[cyc] = num[cyc]*10+(str[i]-'0'); + break; + case '.': + cyc++; + break; + } + } + + value = num[0]*256*256*256+num[1]*256*256+num[2]*256+num[3]; + return(value); +} + + +static unsigned +code_int(unsigned ip, wrkrInstanceData_t *pWrkrData){ + unsigned random; + unsigned long long shiftIP_subst = ip; + // variable needed because shift operation of 32nd bit in unsigned does not work + switch(pWrkrData->pData->ipv4.mode) { + case ZERO: + shiftIP_subst = ((shiftIP_subst>>(pWrkrData->pData->ipv4.bits))<<(pWrkrData->pData->ipv4.bits)); + return (unsigned)shiftIP_subst; + case RANDOMINT: + shiftIP_subst = ((shiftIP_subst>>(pWrkrData->pData->ipv4.bits))<<(pWrkrData->pData->ipv4.bits)); + // multiply the random number between 0 and 1 with a mask of (2^n)-1: + random = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)* + ((1ull<<(pWrkrData->pData->ipv4.bits))-1)); + return (unsigned)shiftIP_subst + random; + case SIMPLE: //can't happen, since this case is caught at the start of anonipv4() + default: + LogError(0, RS_RET_INTERNAL_ERROR, "mmanon: unexpected code path reached in code_int function"); + return 0; + } +} + + +static int +num2ipv4(unsigned num, char *str) { + int numip[4]; + size_t len; + for(int i = 0 ; i < 4 ; i++){ + numip[i] = num % 256; + num = num / 256; + } + len = snprintf(str, 16, "%d.%d.%d.%d", numip[3], numip[2], numip[1], numip[0]); + return len; +} + + +static void +getip(uchar *start, size_t end, char *address) +{ + size_t i; + + for(i = 0; i < end; i++){ + address[i] = *(start+i); + } + address[i] = '\0'; +} + +/* in case of error with malloc causing abort of function, the + * string at the target of address remains the same */ +static rsRetVal +findip(char* address, wrkrInstanceData_t *pWrkrData) +{ + DEFiRet; + int i; + unsigned num; + union node* current; + union node* Last; + int MoreLess; + char* CurrentCharPtr; + + current = pWrkrData->pData->ipv4.Root; + num = ipv42num(address); + for(i = 0; i < 31; i++){ + if(pWrkrData->pData->ipv4.Root == NULL) { + CHKmalloc(current = (union node*)calloc(1, sizeof(union node))); + pWrkrData->pData->ipv4.Root = current; + } + Last = current; + if((num >> (31 - i)) & 1){ + current = current->pointer.more; + MoreLess = 1; + } else { + current = current->pointer.less; + MoreLess = 0; + } + if(current == NULL){ + CHKmalloc(current = (union node*)calloc(1, sizeof(union node))); + if(MoreLess == 1){ + Last->pointer.more = current; + } else { + Last->pointer.less = current; + } + } + } + if(num & 1){ + CurrentCharPtr = current->ips.ip_high; + } else { + CurrentCharPtr = current->ips.ip_low; + } + if(CurrentCharPtr[0] != '\0'){ + strcpy(address, CurrentCharPtr); + } else { + num = code_int(num, pWrkrData); + num2ipv4(num, CurrentCharPtr); + strcpy(address, CurrentCharPtr); + } +finalize_it: + RETiRet; +} + + +static void +process_IPv4 (char* address, wrkrInstanceData_t *pWrkrData) +{ + unsigned num; + + if(pWrkrData->pData->ipv4.randConsis){ + findip(address, pWrkrData); + }else { + num = ipv42num(address); + num = code_int(num, pWrkrData); + num2ipv4(num, address); + } +} + + +static void +simpleAnon(wrkrInstanceData_t *const pWrkrData, uchar *const msg, int *const hasChanged, int iplen) +{ + int maxidx = iplen - 1; + + int j = -1; + for(int i = (pWrkrData->pData->ipv4.bits / 8); i > 0; i--) { + j++; + while('0' <= msg[maxidx - j] && msg[maxidx - j] <= '9') { + if(msg[maxidx - j] != pWrkrData->pData->ipv4.replaceChar) { + msg[maxidx - j] = pWrkrData->pData->ipv4.replaceChar; + *hasChanged = 1; + } + j++; + } + } +} + + +static void +anonipv4(wrkrInstanceData_t *pWrkrData, uchar **msg, int *pLenMsg, int *idx, int *hasChanged) +{ + char address[16]; + char caddress[16]; + int offset = *idx; + uchar* msgcpy = *msg; + size_t iplen; + size_t caddresslen; + int oldLen = *pLenMsg; + + if(syntax_ipv4((*msg) + offset, *pLenMsg - offset, &iplen)) { + if(pWrkrData->pData->ipv4.mode == SIMPLE) { + simpleAnon(pWrkrData, *msg + *idx, hasChanged, iplen); + *idx += iplen; + return; + } + + assert(iplen < sizeof(address)); + getip(*msg + offset, iplen, address); + offset += iplen; + strcpy(caddress, address); + process_IPv4(caddress, pWrkrData); + caddresslen = strlen(caddress); + *hasChanged = 1; + + if(caddresslen != strlen(address)) { + *pLenMsg = *pLenMsg + ((int)caddresslen - (int)strlen(address)); + *msg = (uchar*) malloc(*pLenMsg); + memcpy(*msg, msgcpy, *idx); + } + memcpy(*msg + *idx, caddress, caddresslen); + *idx = *idx + caddresslen; + if(*idx < *pLenMsg) { + memcpy(*msg + *idx, msgcpy + offset, oldLen - offset); + } + if(msgcpy != *msg) { + free(msgcpy); + } + } +} + + +static void +code_ipv6_int(struct ipv6_int* ip, wrkrInstanceData_t *pWrkrData, int useEmbedded) +{ + unsigned long long randlow = 0; + unsigned long long randhigh = 0; + unsigned tmpRand; + int fullbits; + + int bits = useEmbedded ? pWrkrData->pData->embeddedIPv4.bits : pWrkrData->pData->ipv6.bits; + enum mode anonmode = useEmbedded ? pWrkrData->pData->embeddedIPv4.anonmode : pWrkrData->pData->ipv6.anonmode; + + if(bits == 128) { //has to be handled separately, since shift + //128 bits doesn't work on unsigned long long + ip->high = 0; + ip->low = 0; + } else if(bits > 64) { + ip->low = 0; + ip->high = (ip->high >> (bits - 64)) << (bits - 64); + } else if(bits == 64) { + ip->low = 0; + } else { + ip->low = (ip->low >> bits) << bits; + } + switch(anonmode) { + case ZERO: + break; + case RANDOMINT: + if(bits == 128) { + for(int i = 0; i < 8; i++) { + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*0xff); + ip->high <<= 8; + ip->high |= tmpRand; + + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*0xff); + ip->low <<= 8; + ip->low |= tmpRand; + } + } else if(bits > 64) { + for(int i = 0; i < 8; i++) { + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*0xff); + ip->low <<= 8; + ip->low |= tmpRand; + } + + bits -= 64; + fullbits = bits / 8; + bits = bits % 8; + while(fullbits > 0) { + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*0xff); + randhigh <<= 8; + randhigh |= tmpRand; + fullbits--; + } + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*((1 << bits) - 1)); + randhigh <<= bits; + randhigh |= tmpRand; + + ip->high |= randhigh; + } else if(bits == 64) { + for(int i = 0; i < 8; i++) { + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*0xff); + ip->low <<= 8; + ip->low |= tmpRand; + } + } else { + fullbits = bits / 8; + bits = bits % 8; + while(fullbits > 0) { + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*0xff); + randlow <<= 8; + randlow |= tmpRand; + fullbits--; + } + tmpRand = (unsigned)((rand_r(&(pWrkrData->randstatus))/(double)RAND_MAX)*((1 << bits) - 1)); + randlow <<= bits; + randlow |= tmpRand; + + ip->low |= randlow; + } + break; + case SIMPLE: //can't happen, since this case is caught at the start of anonipv4() + default: + LogError(0, RS_RET_INTERNAL_ERROR, "mmanon: unexpected code path reached in code_int function"); + } +} + + +//separate function from recognising ipv6, since the recognition might get more +//complex. This function always stays +//the same, since it always gets an valid ipv6 input +static void +ipv62num(char* const address, const size_t iplen, struct ipv6_int* const ip) +{ + int num[8] = {0, 0, 0, 0, 0, 0, 0, 0}; + int cyc = 0; + int dots = 0; + int val; + unsigned i; + + for(i = 0; i < iplen && dots < 2; i++) { + val = getHexVal(address[i]); + if(val == -1) { + dots++; + if(dots < 2) { + cyc++; + } + } else { + num[cyc] = num[cyc] * 16 + val; + dots = 0; + } + } + if(dots == 2) { + if(i < iplen - 1) { + int shift = 0; + cyc = 7; + for(unsigned j = iplen - 1; j >= i; j--) { + val = getHexVal(address[j]); + if(val == -1) { + cyc--; + shift = 0; + } else { + val <<= shift; + shift += 4; + num[cyc] += val; + } + } + } else { + while(cyc < 8) { + num[cyc] = 0; + cyc++; + } + } + } + + for(i = 0; i < 4; i++) { + ip->high <<= 16; + ip->high |= num[i]; + } + while(i < 8) { + ip->low <<= 16; + ip->low |= num[i]; + i++; + } +} + + +static void +num2ipv6 (struct ipv6_int* ip, char* address) +{ + int num[8]; + int i; + + for(i = 7; i > 3; i--) { + num[i] = ip->low & 0xffff; + ip->low >>= 16; + } + while(i > -1) { + num[i] = ip->high & 0xffff; + ip->high >>= 16; + i--; + } + + snprintf(address, 40, "%x:%x:%x:%x:%x:%x:%x:%x", num[0], num[1], num[2], num[3], num[4], num[5], + num[6], num[7]); +} + + +static int +keys_equal_fn(void* key1, void* key2) +{ + struct ipv6_int *const k1 = (struct ipv6_int*) key1; + struct ipv6_int *const k2 = (struct ipv6_int*) key2; + + return((k1->high == k2->high) && (k1->low == k2->low)); +} + + +static unsigned +hash_from_key_fn (void* k) +{ + struct ipv6_int *const key = (struct ipv6_int*) k; + unsigned hashVal; + + hashVal = (key->high & 0xFFC00000) | (key->low & 0x3FFFFF); + return hashVal; +} + + +static void +num2embedded (struct ipv6_int* ip, char* address) +{ + int num[8]; + int i; + + for(i = 7; i > 3; i--) { + num[i] = ip->low & 0xffff; + ip->low >>= 16; + } + while(i > -1) { + num[i] = ip->high & 0xffff; + ip->high >>= 16; + i--; + } + + snprintf(address, 46, "%x:%x:%x:%x:%x:%x:%d.%d.%d.%d", num[0], num[1], num[2], num[3], num[4], num[5], + (num[6] & 0xff00) >> 8, num[6] & 0xff, (num[7] & 0xff00) >> 8, num[7] & 0xff); +} + + +static rsRetVal +findIPv6(struct ipv6_int* num, char* address, wrkrInstanceData_t *const pWrkrData, int useEmbedded) +{ + struct ipv6_int* hashKey = NULL; + DEFiRet; + struct hashtable* hash = useEmbedded? pWrkrData->pData->embeddedIPv4.hash : pWrkrData->pData->ipv6.hash; + + + if(hash == NULL) { + CHKmalloc(hash = create_hashtable(512, hash_from_key_fn, keys_equal_fn, NULL)); + if(useEmbedded) { + pWrkrData->pData->embeddedIPv4.hash = hash; + } else { + pWrkrData->pData->ipv6.hash = hash; + } + } + + char* val = (char*)(hashtable_search(hash, num)); + + if(val != NULL) { + strcpy(address, val); + } else { + CHKmalloc(hashKey = (struct ipv6_int*) malloc(sizeof(struct ipv6_int))); + hashKey->low = num->low; + hashKey->high = num->high; + + if(useEmbedded) { + code_ipv6_int(num, pWrkrData, 1); + num2embedded(num, address); + } else { + code_ipv6_int(num, pWrkrData, 0); + num2ipv6(num, address); + } + char* hashString; + CHKmalloc(hashString = strdup(address)); + + if(!hashtable_insert(hash, hashKey, hashString)) { + DBGPRINTF("hashtable error: insert to %s-table failed", + useEmbedded ? "embedded ipv4" : "ipv6"); + free(hashString); + ABORT_FINALIZE(RS_RET_ERR); + } + hashKey = NULL; + } +finalize_it: + free(hashKey); + RETiRet; +} + + +static void +process_IPv6 (char* address, wrkrInstanceData_t *pWrkrData, const size_t iplen) +{ + struct ipv6_int num = {0, 0}; + + ipv62num(address, iplen, &num); + + if(pWrkrData->pData->ipv6.randConsis) { + findIPv6(&num, address, pWrkrData, 0); + } else { + code_ipv6_int(&num, pWrkrData, 0); + num2ipv6(&num, address); + } +} + + +static void +anonipv6(wrkrInstanceData_t *pWrkrData, uchar **msg, int *pLenMsg, int *idx, int *hasChanged) +{ + size_t iplen = 0; + int offset = *idx; + char address[40]; + uchar* msgcpy = *msg; + size_t caddresslen; + size_t oldLen = *pLenMsg; + + int syn = syntax_ipv6(*msg + offset, *pLenMsg - offset, &iplen); + if(syn) { + assert(iplen < sizeof(address)); //has to be < instead of <= since address includes space for a '\0' + getip(*msg + offset, iplen, address); + offset += iplen; + process_IPv6(address, pWrkrData, iplen); + + caddresslen = strlen(address); + *hasChanged = 1; + + if(caddresslen != iplen) { + *pLenMsg = *pLenMsg + ((int)caddresslen - (int)iplen); + *msg = (uchar*) malloc(*pLenMsg); + memcpy(*msg, msgcpy, *idx); + } + memcpy(*msg + *idx, address, caddresslen); + *idx = *idx + caddresslen; + if(*idx < *pLenMsg) { + memcpy(*msg + *idx, msgcpy + offset, oldLen - offset); + } + if(msgcpy != *msg) { + free(msgcpy); + } + } +} + + +static size_t +findV4Start(const uchar *const __restrict__ buf, size_t dotPos) +{ + while(dotPos > 0) { + if(buf[dotPos] == ':') { + return dotPos + 1; + } + dotPos--; + } + return -1; //should not happen +} + + +static int +syntax_embedded(const uchar *const __restrict__ buf, + const size_t buflen, + size_t *const __restrict__ nprocessed, + size_t * v4Start) +{ + int lastSep = 0; + sbool hadAbbrev = 0; + int ipParts = 0; + int numLen; + int isIP = 0; + size_t ipv4Len; + + while(*nprocessed < buflen) { + numLen = isValidHexNum(buf + *nprocessed, buflen - *nprocessed, nprocessed, 1); + if(numLen > 0) { //found a valid num + if((ipParts == 6 && hadAbbrev) || ipParts > 6) { //is 6 since the first part of + //IPv4 will also result in a valid hexvalue + isIP = 0; + goto done; + } + if (ipParts == 0 && lastSep && !hadAbbrev) { + isIP = 0; + goto done; + } + lastSep = 0; + ipParts++; + } else if (numLen == -1) { //':' + if(lastSep) { + if(hadAbbrev) { + isIP = 0; + goto done; + } else { + hadAbbrev = 1; + } + } + lastSep = 1; + } else if (numLen == -2) { //'.' + if (lastSep || (ipParts == 0 && hadAbbrev) || (ipParts <= 6 && !hadAbbrev)) { + isIP = 0; + goto done; + } + *v4Start = findV4Start(buf, (*nprocessed) - 1); + if(syntax_ipv4(buf + (*v4Start), buflen, &ipv4Len)) { + *nprocessed += (ipv4Len - ((*nprocessed) - (*v4Start))); + isIP = 1; + goto done; + } else { + isIP = 0; + goto done; + } + } else { //no valid num + isIP = 0; + goto done; + } + } + + isIP = 0; + +done: + return isIP; +} + + +static void +embedded2num(char* address, size_t v4Start, struct ipv6_int* ip) +{ + int num[8] = {0, 0, 0, 0, 0, 0, 0, 0}; + int cyc = 0; + int dots = 0; + int val; + unsigned i; + + unsigned v4Val = ipv42num(address + v4Start); + num[7] = v4Val & 0xffff; + num[6] = (v4Val & 0xffff0000) >> 16; + + for(i = 0; i < v4Start && dots < 2; i++) { + val = getHexVal(address[i]); + if(val == -1) { + dots++; + if(dots < 2) { + cyc++; + } + } else { + num[cyc] = num[cyc] * 16 + val; + dots = 0; + } + } + if(dots == 2) { + if(i < v4Start) { + int shift = 0; + cyc = 5; + for(unsigned j = v4Start - 1; j >= i; j--) { + val = getHexVal(address[j]); + if(val == -1) { + cyc--; + shift = 0; + } else { + val <<= shift; + shift += 4; + num[cyc] += val; + } + } + } else { + while(cyc < 6) { + num[cyc] = 0; + cyc++; + } + } + } + + for(i = 0; i < 4; i++) { + ip->high <<= 16; + ip->high |= num[i]; + } + while(i < 8) { + ip->low <<= 16; + ip->low |= num[i]; + i++; + } +} + + +static void +process_embedded (char* address, wrkrInstanceData_t *pWrkrData, size_t v4Start) +{ + struct ipv6_int num = {0, 0}; + + embedded2num(address, v4Start, &num); + + if(pWrkrData->pData->embeddedIPv4.randConsis) { + findIPv6(&num, address, pWrkrData, 1); + } else { + code_ipv6_int(&num, pWrkrData, 1); + num2embedded(&num, address); + } +} + + +static void +anonEmbedded(wrkrInstanceData_t *pWrkrData, uchar **msg, int *pLenMsg, int *idx, int *hasChanged) +{ + size_t iplen = 0; + int offset = *idx; + char address[46]; + uchar* msgcpy = *msg; + unsigned caddresslen; + size_t oldLen = *pLenMsg; + size_t v4Start; + + int syn = syntax_embedded(*msg + offset, *pLenMsg - offset, &iplen, &v4Start); + if(syn) { + assert(iplen < sizeof(address)); + getip(*msg + offset, iplen, address); + offset += iplen; + process_embedded(address, pWrkrData, v4Start); + + caddresslen = strlen(address); + *hasChanged = 1; + + if(caddresslen != iplen) { + *pLenMsg = *pLenMsg + ((int)caddresslen - (int)iplen); + *msg = (uchar*) malloc(*pLenMsg); + memcpy(*msg, msgcpy, *idx); + } + memcpy(*msg + *idx, address, caddresslen); + *idx = *idx + caddresslen; + if(*idx < *pLenMsg) { + memcpy(*msg + *idx, msgcpy + offset, oldLen - offset); + } + if(msgcpy != *msg) { + free(msgcpy); + } + } +} + +BEGINdoAction_NoStrings + smsg_t **ppMsg = (smsg_t **) pMsgData; + smsg_t *pMsg = ppMsg[0]; + uchar *msg; + int lenMsg; + int i; + int hasChanged = 0; +CODESTARTdoAction + lenMsg = getMSGLen(pMsg); + msg = (uchar*)strdup((char*)getMSG(pMsg)); + + for(i = 0 ; i <= lenMsg - 2 ; i++) { + if(pWrkrData->pData->embeddedIPv4.enable) { + anonEmbedded(pWrkrData, &msg, &lenMsg, &i, &hasChanged); + } + if(pWrkrData->pData->ipv4.enable) { + anonipv4(pWrkrData, &msg, &lenMsg, &i, &hasChanged); + } + if(pWrkrData->pData->ipv6.enable) { + anonipv6(pWrkrData, &msg, &lenMsg, &i, &hasChanged); + } + } + if(hasChanged) { + MsgReplaceMSG(pMsg, msg, lenMsg); + } + free(msg); +ENDdoAction + + +NO_LEGACY_CONF_parseSelectorAct + + +BEGINmodExit +CODESTARTmodExit +ENDmodExit + + +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_OMOD_QUERIES +CODEqueryEtryPt_STD_OMOD8_QUERIES +CODEqueryEtryPt_STD_CONF2_OMOD_QUERIES +CODEqueryEtryPt_STD_CONF2_QUERIES +ENDqueryEtryPt + + + +BEGINmodInit() +CODESTARTmodInit + *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */ +CODEmodInit_QueryRegCFSLineHdlr + DBGPRINTF("mmanon: module compiled with rsyslog version %s.\n", VERSION); +ENDmodInit |