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-rw-r--r--src/or/config.c639
1 files changed, 358 insertions, 281 deletions
diff --git a/src/or/config.c b/src/or/config.c
index 37811f37ae..5db8d4d5f0 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -2,22 +2,9 @@
/* See LICENSE for licensing information */
/* $Id$ */
-/**
- * config.c
- * Routines for loading the configuration file.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
#include "or.h"
-#ifndef POPT_TABLEEND /* handle popt 1.6 before 1.6.2 */
-#define POPT_TABLEEND { NULL, '\0', 0, 0, 0, NULL, NULL }
-#endif
-
-const char *
-basename(const char *filename)
-{
+const char *basename(const char *filename) {
char *result;
/* XXX This won't work on windows. */
result = strrchr(filename, '/');
@@ -27,279 +14,369 @@ basename(const char *filename)
return filename;
}
-/* loads the configuration file */
-int getconfig(char *conf_filename, config_opt_t *options)
-{
- FILE *cf = NULL;
- int retval = 0;
-
- if ((!conf_filename) || (!options))
- return -1;
-
- /* load config file */
- cf = open_config(conf_filename);
- if (!cf)
- {
- log(LOG_ERR,"Could not open configuration file %s.",conf_filename);
- return -1;
+/* open configuration file for reading */
+FILE *config_open(const unsigned char *filename) {
+ assert(filename);
+ if (strspn(filename,CONFIG_LEGAL_FILENAME_CHARACTERS) != strlen(filename)) {
+ /* filename has illegal letters */
+ return NULL;
+ }
+ return fopen(filename, "r");
+}
+
+/* close configuration file */
+int config_close(FILE *f) {
+ assert(f);
+ return fclose(f);
+}
+
+struct config_line *config_get_commandlines(int argc, char **argv) {
+ struct config_line *new;
+ struct config_line *front = NULL;
+ char *s;
+ int i = 1;
+
+ while(i < argc-1) {
+ if(!strcmp(argv[i],"-f")) {
+// log(LOG_DEBUG,"Commandline: skipping over -f.");
+ i+=2; /* this is the config file option. ignore it. */
+ continue;
+ }
+
+ new = malloc(sizeof(struct config_line));
+ s = argv[i];
+ while(*s == '-')
+ s++;
+ new->key = strdup(s);
+ new->value = strdup(argv[i+1]);
+
+ log(LOG_DEBUG,"Commandline: parsed keyword '%s', value '%s'",
+ new->key, new->value);
+ new->next = front;
+ front = new;
+ i += 2;
+ }
+ return front;
+}
+
+/* parse the config file and strdup into key/value strings. Return list.
+ * * Warn and ignore mangled lines. */
+struct config_line *config_get_lines(FILE *f) {
+ struct config_line *new;
+ struct config_line *front = NULL;
+ char line[CONFIG_LINE_MAXLEN];
+ int lineno=0; /* current line number */
+ char *s;
+ char *start, *end;
+
+ assert(f);
+
+ fseek(f,0,SEEK_SET); /* make sure we start at the beginning of file */
+
+ while(fgets(line, CONFIG_LINE_MAXLEN, f)) {
+ lineno++;
+
+ /* first strip comments */
+ s = strchr(line,'#');
+ if(s) {
+ *s = 0; /* stop the line there */
+ }
+
+ /* walk to the end, remove end whitespace */
+ s = index(line, 0); /* now we're at the null */
+ do {
+ *s = 0;
+ s--;
+ } while (isspace(*s));
+
+ start = line;
+ while(isspace(*start))
+ start++;
+ if(*start == 0)
+ continue; /* this line has nothing on it */
+
+ end = start;
+ while(*end && !isspace(*end))
+ end++;
+ s = end;
+ while(*s && isspace(*s))
+ s++;
+ if(!*end || !*s) { /* only a keyword on this line. no value. */
+ log(LOG_WARNING,"Config line %d has keyword '%s' but no value. Skipping.",lineno,s);
+ }
+ *end = 0; /* null it out */
+
+ /* prepare to parse the string into key / value */
+ new = malloc(sizeof(struct config_line));
+ new->key = strdup(start);
+ new->value = strdup(s);
+
+ log(LOG_DEBUG,"Config line %d: parsed keyword '%s', value '%s'",
+ lineno, new->key, new->value);
+ new->next = front;
+ front = new;
}
- retval = parse_config(cf,options);
- if (retval)
- return -1;
- return 0;
+ return front;
}
-int getoptions(int argc, char **argv, or_options_t *options)
-/**
-
-A replacement for getargs() and getconfig() which uses the <popt> library to parse
-both command-line arguments and configuration files. A specific configuration file
-may be specified using the --ConfigFile option. If one is not specified, then the
-configuration files at /etc/<cmd>rc and ~/.<cmd>rc will be loaded in that order so
-user preferences will override the ones specified in /etc.
-
-The --ConfigFile (-f) option may only be used on the command-line. All other command-line
-options may also be specified in configuration files. <popt> aliases are enabled
-so a user can define their own options in the /etc/popt or ~/.popt files as outlined
-in "man popt" pages.
-
-RETURN VALUE: 0 on success, non-zero on error
-**/
-{
- char *ConfigFile;
- int Verbose;
- int code;
- poptContext optCon;
- const char *cmd;
- struct poptOption opt_tab[] =
- {
- { "APPort", 'a', POPT_ARG_INT, &options->APPort,
- 0, "application proxy port", "<port>" },
- { "CoinWeight", 'w', POPT_ARG_FLOAT, &options->CoinWeight,
- 0, "coin weight used in determining routes", "<weight>" },
- { "ConfigFile", 'f', POPT_ARG_STRING, &ConfigFile,
- 0, "user specified configuration file", "<file>" },
- { "LogLevel", 'l', POPT_ARG_STRING, &options->LogLevel,
- 0, "emerg|alert|crit|err|warning|notice|info|debug", "<level>" },
- { "MaxConn", 'm', POPT_ARG_INT, &options->MaxConn,
- 0, "maximum number of incoming connections", "<max>" },
- { "OPPort", 'o', POPT_ARG_INT, &options->OPPort,
- 0, "onion proxy port", "<port>" },
- { "ORPort", 'p', POPT_ARG_INT, &options->ORPort,
- 0, "onion router port", "<port>" },
- { "DirPort", 'd', POPT_ARG_INT, &options->DirPort,
- 0, "directory server port", "<port>" },
- { "PrivateKeyFile", 'k', POPT_ARG_STRING, &options->PrivateKeyFile,
- 0, "maximum number of incoming connections", "<file>" },
- { "RouterFile", 'r', POPT_ARG_STRING, &options->RouterFile,
- 0, "local port on which the onion proxy is running", "<file>" },
- { "TrafficShaping", 't', POPT_ARG_INT, &options->TrafficShaping,
- 0, "which traffic shaping policy to use", "<policy>" },
- { "LinkPadding", 'P', POPT_ARG_INT, &options->LinkPadding,
- 0, "whether to use link padding", "<padding>" },
- { "DirRebuildPeriod",'D', POPT_ARG_INT, &options->DirRebuildPeriod,
- 0, "how many seconds between directory rebuilds", "<rebuildperiod>" },
- { "DirFetchPeriod", 'F', POPT_ARG_INT, &options->DirFetchPeriod,
- 0, "how many seconds between directory fetches", "<fetchperiod>" },
- { "KeepalivePeriod", 'K', POPT_ARG_INT, &options->KeepalivePeriod,
- 0, "how many seconds between keepalives", "<keepaliveperiod>" },
-// { "ReconnectPeriod", 'e', POPT_ARG_INT, &options->ReconnectPeriod,
-// 0, "how many seconds between retrying all OR connections", "<reconnectperiod>" },
- { "Role", 'R', POPT_ARG_INT, &options->Role,
- 0, "4-bit global role id", "<role>" },
- { "Verbose", 'v', POPT_ARG_NONE, &Verbose,
- 0, "display options selected before execution", NULL },
- POPT_AUTOHELP /* handles --usage and --help automatically */
- POPT_TABLEEND /* marks end of table */
- };
- cmd = basename(argv[0]);
- optCon = poptGetContext(cmd,argc,(const char **)argv,opt_tab,0);
-
- poptReadDefaultConfig(optCon,0); /* read <popt> alias definitions */
-
- /* assign default option values */
-
- bzero(options,sizeof(or_options_t));
- options->LogLevel = "debug";
- options->loglevel = LOG_DEBUG;
- options->CoinWeight = 0.8;
- options->LinkPadding = 0;
- options->DirRebuildPeriod = 600;
- options->DirFetchPeriod = 6000;
- options->KeepalivePeriod = 300;
-// options->ReconnectPeriod = 6001;
- options->Role = ROLE_OR_LISTEN | ROLE_OR_CONNECT_ALL | ROLE_OP_LISTEN | ROLE_AP_LISTEN;
-
- code = poptGetNextOpt(optCon); /* first we handle command-line args */
- if ( code == -1 )
- {
- if ( ConfigFile ) /* handle user-specified config file */
- code = poptReadOptions(optCon,ConfigFile);
- else /* load Default configuration files */
- code = poptReadDefaultOptions(cmd,optCon);
- }
-
- switch(code) /* error checking */
- {
- case INT_MIN:
- log(LOG_ERR, "%s: Unable to open configuration file.\n", ConfigFile);
+void config_free_lines(struct config_line *front) {
+ struct config_line *tmp;
+
+ while(front) {
+ tmp = front;
+ front = tmp->next;
+
+ free(tmp->key);
+ free(tmp->value);
+ free(tmp);
+ }
+}
+
+int config_compare(struct config_line *c, char *key, int type, void *arg) {
+
+ if(strncasecmp(c->key,key,strlen(c->key)))
+ return 0;
+
+ /* it's a match. cast and assign. */
+ log(LOG_DEBUG,"config_compare(): Recognized keyword '%s' as %s, using value '%s'.",c->key,key,c->value);
+
+ switch(type) {
+ case CONFIG_TYPE_INT:
+ *(int *)arg = atoi(c->value);
break;
- case -1:
- code = 0;
+ case CONFIG_TYPE_STRING:
+ *(char **)arg = strdup(c->value);
break;
- default:
- poptPrintUsage(optCon, stderr, 0);
- log(LOG_ERR, "%s: %s\n", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(code));
+ case CONFIG_TYPE_DOUBLE:
+ *(double *)arg = atof(c->value);
break;
- }
-
- poptFreeContext(optCon);
-
- if ( code ) return code; /* return here if we encountered any problems */
-
- /* Display options upon user request */
-
- if ( Verbose )
- {
- printf("LogLevel=%s, Role=%d\n",
- options->LogLevel,
- options->Role);
- printf("RouterFile=%s, PrivateKeyFile=%s\n",
- options->RouterFile,
- options->PrivateKeyFile);
- printf("ORPort=%d, OPPort=%d, APPort=%d DirPort=%d\n",
- options->ORPort,options->OPPort,
- options->APPort,options->DirPort);
- printf("CoinWeight=%6.4f, MaxConn=%d, TrafficShaping=%d, LinkPadding=%d\n",
- options->CoinWeight,
- options->MaxConn,
- options->TrafficShaping,
- options->LinkPadding);
- printf("DirRebuildPeriod=%d, DirFetchPeriod=%d KeepalivePeriod=%d\n",
- options->DirRebuildPeriod,
- options->DirFetchPeriod,
- options->KeepalivePeriod);
- }
-
- /* Validate options */
-
- if ( options->LogLevel )
- {
- if (!strcmp(options->LogLevel,"emerg"))
- options->loglevel = LOG_EMERG;
- else if (!strcmp(options->LogLevel,"alert"))
- options->loglevel = LOG_ALERT;
- else if (!strcmp(options->LogLevel,"crit"))
- options->loglevel = LOG_CRIT;
- else if (!strcmp(options->LogLevel,"err"))
- options->loglevel = LOG_ERR;
- else if (!strcmp(options->LogLevel,"warning"))
- options->loglevel = LOG_WARNING;
- else if (!strcmp(options->LogLevel,"notice"))
- options->loglevel = LOG_NOTICE;
- else if (!strcmp(options->LogLevel,"info"))
- options->loglevel = LOG_INFO;
- else if (!strcmp(options->LogLevel,"debug"))
- options->loglevel = LOG_DEBUG;
- else
- {
- log(LOG_ERR,"LogLevel must be one of emerg|alert|crit|err|warning|notice|info|debug.");
- code = -1;
- }
- }
-
- if ( options->Role < 0 || options->Role > 63 )
- {
- log(LOG_ERR,"Role option must be an integer between 0 and 63 (inclusive).");
- code = -1;
- }
-
- if ( options->RouterFile == NULL )
- {
- log(LOG_ERR,"RouterFile option required, but not found.");
- code = -1;
- }
-
- if ( ROLE_IS_OR(options->Role) && options->PrivateKeyFile == NULL )
- {
- log(LOG_ERR,"PrivateKeyFile option required for OR, but not found.");
- code = -1;
- }
-
- if ( (options->Role & ROLE_OR_LISTEN) && options->ORPort < 1 )
- {
- log(LOG_ERR,"ORPort option required and must be a positive integer value.");
- code = -1;
- }
-
- if ( (options->Role & ROLE_OP_LISTEN) && options->OPPort < 1 )
- {
- log(LOG_ERR,"OPPort option required and must be a positive integer value.");
- code = -1;
- }
-
- if ( (options->Role & ROLE_AP_LISTEN) && options->APPort < 1 )
- {
- log(LOG_ERR,"APPort option required and must be a positive integer value.");
- code = -1;
- }
-
- if ( (options->Role & ROLE_DIR_LISTEN) && options->DirPort < 1 )
- {
- log(LOG_ERR,"DirPort option required and must be a positive integer value.");
- code = -1;
- }
-
- if ( (options->Role & ROLE_AP_LISTEN) &&
- (options->CoinWeight < 0.0 || options->CoinWeight >= 1.0) )
- {
- log(LOG_ERR,"CoinWeight option must be a value from 0.0 upto 1.0, but not including 1.0.");
- code = -1;
- }
-
- if ( options->MaxConn <= 0 )
- {
- log(LOG_ERR,"MaxConn option must be a non-zero positive integer.");
- code = -1;
- }
-
- if ( options->MaxConn >= MAXCONNECTIONS )
- {
- log(LOG_ERR,"MaxConn option must be less than %d.", MAXCONNECTIONS);
- code = -1;
- }
-
- if ( options->TrafficShaping != 0 && options->TrafficShaping != 1 )
- {
- log(LOG_ERR,"TrafficShaping option must be either 0 or 1.");
- code = -1;
- }
-
- if ( options->LinkPadding != 0 && options->LinkPadding != 1 )
- {
- log(LOG_ERR,"LinkPadding option must be either 0 or 1.");
- code = -1;
- }
-
- if ( options->DirRebuildPeriod < 1)
- {
- log(LOG_ERR,"DirRebuildPeriod option must be positive.");
- code = -1;
- }
-
- if ( options->DirFetchPeriod < 1)
- {
- log(LOG_ERR,"DirFetchPeriod option must be positive.");
- code = -1;
- }
-
- if ( options->KeepalivePeriod < 1)
- {
- log(LOG_ERR,"KeepalivePeriod option must be positive.");
- code = -1;
- }
-
- return code;
+ }
+ return 1;
+}
+
+void config_assign(or_options_t *options, struct config_line *list) {
+
+ /* iterate through list. for each item convert as appropriate and assign to 'options'. */
+
+ while(list) {
+ if(
+
+ /* order matters here! abbreviated arguments use the first match. */
+
+ /* string options */
+ config_compare(list, "LogLevel", CONFIG_TYPE_STRING, &options->LogLevel) ||
+ config_compare(list, "PrivateKeyFile", CONFIG_TYPE_STRING, &options->PrivateKeyFile) ||
+ config_compare(list, "RouterFile", CONFIG_TYPE_STRING, &options->RouterFile) ||
+
+ /* int options */
+ config_compare(list, "Role", CONFIG_TYPE_INT, &options->Role) ||
+ config_compare(list, "MaxConn", CONFIG_TYPE_INT, &options->MaxConn) ||
+ config_compare(list, "APPort", CONFIG_TYPE_INT, &options->APPort) ||
+ config_compare(list, "OPPort", CONFIG_TYPE_INT, &options->OPPort) ||
+ config_compare(list, "ORPort", CONFIG_TYPE_INT, &options->ORPort) ||
+ config_compare(list, "DirPort", CONFIG_TYPE_INT, &options->DirPort) ||
+ config_compare(list, "TrafficShaping", CONFIG_TYPE_INT, &options->TrafficShaping) ||
+ config_compare(list, "LinkPadding", CONFIG_TYPE_INT, &options->LinkPadding) ||
+ config_compare(list, "DirRebuildPeriod",CONFIG_TYPE_INT, &options->DirRebuildPeriod) ||
+ config_compare(list, "DirFetchPeriod", CONFIG_TYPE_INT, &options->DirFetchPeriod) ||
+ config_compare(list, "KeepalivePeriod", CONFIG_TYPE_INT, &options->KeepalivePeriod) ||
+
+ /* float options */
+ config_compare(list, "CoinWeight", CONFIG_TYPE_DOUBLE, &options->CoinWeight)
+
+ ) {
+ /* then we're ok. it matched something. */
+ } else {
+ log(LOG_WARNING,"config_assign(): Ignoring unknown keyword '%s'.",list->key);
+ }
+
+ list = list->next;
+ }
+}
+
+/* return 0 if success, <0 if failure. */
+int getconfig(int argc, char **argv, or_options_t *options) {
+ struct config_line *cl;
+ FILE *cf;
+ char fname[256];
+ int i;
+ const char *cmd;
+ int result = 0;
+
+/* give reasonable defaults for each option */
+ memset(options,0,sizeof(or_options_t));
+ options->LogLevel = "debug";
+ options->loglevel = LOG_DEBUG;
+ options->CoinWeight = 0.8;
+ options->LinkPadding = 0;
+ options->DirRebuildPeriod = 600;
+ options->DirFetchPeriod = 6000;
+ options->KeepalivePeriod = 300;
+// options->ReconnectPeriod = 6001;
+ options->Role = ROLE_OR_LISTEN | ROLE_OR_CONNECT_ALL | ROLE_OP_LISTEN | ROLE_AP_LISTEN;
+
+/* get config lines from /etc/torrc and assign them */
+ cmd = basename(argv[0]);
+ snprintf(fname,256,"/etc/%src",cmd);
+
+ cf = config_open(fname);
+ if(cf) {
+ /* we got it open. pull out the config lines. */
+ cl = config_get_lines(cf);
+ config_assign(options,cl);
+ config_free_lines(cl);
+ config_close(cf);
+ }
+ /* if we failed to open it, ignore */
+
+/* learn config file name, get config lines, assign them */
+ i = 1;
+ while(i < argc-1 && strcmp(argv[i],"-f")) {
+// log(LOG_DEBUG,"examining arg %d (%s), it's not -f.",i,argv[i]);
+ i++;
+ }
+ if(i < argc-1) { /* we found one */
+ log(LOG_DEBUG,"Opening specified config file '%s'",argv[i+1]);
+ cf = config_open(argv[i+1]);
+ if(!cf) { /* it's defined but not there. that's no good. */
+ log(LOG_ERR, "Unable to open configuration file '%s'.",argv[i+1]);
+ return -1;
+ }
+ cl = config_get_lines(cf);
+ config_assign(options,cl);
+ config_free_lines(cl);
+ config_close(cf);
+ }
+
+/* go through command-line variables too */
+ cl = config_get_commandlines(argc,argv);
+ config_assign(options,cl);
+ config_free_lines(cl);
+
+/* print config */
+ if (options->loglevel == LOG_DEBUG) {
+ printf("LogLevel=%s, Role=%d\n",
+ options->LogLevel,
+ options->Role);
+ printf("RouterFile=%s, PrivateKeyFile=%s\n",
+ options->RouterFile ? options->RouterFile : "(undefined)",
+ options->PrivateKeyFile ? options->PrivateKeyFile : "(undefined)");
+ printf("ORPort=%d, OPPort=%d, APPort=%d DirPort=%d\n",
+ options->ORPort,options->OPPort,
+ options->APPort,options->DirPort);
+ printf("CoinWeight=%6.4f, MaxConn=%d, TrafficShaping=%d, LinkPadding=%d\n",
+ options->CoinWeight,
+ options->MaxConn,
+ options->TrafficShaping,
+ options->LinkPadding);
+ printf("DirRebuildPeriod=%d, DirFetchPeriod=%d KeepalivePeriod=%d\n",
+ options->DirRebuildPeriod,
+ options->DirFetchPeriod,
+ options->KeepalivePeriod);
+ }
+
+/* Validate options */
+
+ if(options->LogLevel) {
+ if(!strcmp(options->LogLevel,"emerg"))
+ options->loglevel = LOG_EMERG;
+ else if(!strcmp(options->LogLevel,"alert"))
+ options->loglevel = LOG_ALERT;
+ else if(!strcmp(options->LogLevel,"crit"))
+ options->loglevel = LOG_CRIT;
+ else if(!strcmp(options->LogLevel,"err"))
+ options->loglevel = LOG_ERR;
+ else if(!strcmp(options->LogLevel,"warning"))
+ options->loglevel = LOG_WARNING;
+ else if(!strcmp(options->LogLevel,"notice"))
+ options->loglevel = LOG_NOTICE;
+ else if(!strcmp(options->LogLevel,"info"))
+ options->loglevel = LOG_INFO;
+ else if(!strcmp(options->LogLevel,"debug"))
+ options->loglevel = LOG_DEBUG;
+ else {
+ log(LOG_ERR,"LogLevel must be one of emerg|alert|crit|err|warning|notice|info|debug.");
+ result = -1;
+ }
+ }
+
+ if(options->Role < 0 || options->Role > 63) {
+ log(LOG_ERR,"Role option must be an integer between 0 and 63 (inclusive).");
+ result = -1;
+ }
+
+ if(options->RouterFile == NULL) {
+ log(LOG_ERR,"RouterFile option required, but not found.");
+ result = -1;
+ }
+
+ if(ROLE_IS_OR(options->Role) && options->PrivateKeyFile == NULL) {
+ log(LOG_ERR,"PrivateKeyFile option required for OR, but not found.");
+ result = -1;
+ }
+
+ if((options->Role & ROLE_OR_LISTEN) && options->ORPort < 1) {
+ log(LOG_ERR,"ORPort option required and must be a positive integer value.");
+ result = -1;
+ }
+
+ if((options->Role & ROLE_OP_LISTEN) && options->OPPort < 1) {
+ log(LOG_ERR,"OPPort option required and must be a positive integer value.");
+ result = -1;
+ }
+
+ if((options->Role & ROLE_AP_LISTEN) && options->APPort < 1) {
+ log(LOG_ERR,"APPort option required and must be a positive integer value.");
+ result = -1;
+ }
+
+ if((options->Role & ROLE_DIR_LISTEN) && options->DirPort < 1) {
+ log(LOG_ERR,"DirPort option required and must be a positive integer value.");
+ result = -1;
+ }
+
+ if((options->Role & ROLE_AP_LISTEN) &&
+ (options->CoinWeight < 0.0 || options->CoinWeight >= 1.0)) {
+ log(LOG_ERR,"CoinWeight option must be a value from 0.0 upto 1.0, but not including 1.0.");
+ result = -1;
+ }
+
+ if(options->MaxConn <= 0) {
+ log(LOG_ERR,"MaxConn option must be a non-zero positive integer.");
+ result = -1;
+ }
+
+ if(options->MaxConn >= MAXCONNECTIONS) {
+ log(LOG_ERR,"MaxConn option must be less than %d.", MAXCONNECTIONS);
+ result = -1;
+ }
+
+ if(options->TrafficShaping != 0 && options->TrafficShaping != 1) {
+ log(LOG_ERR,"TrafficShaping option must be either 0 or 1.");
+ result = -1;
+ }
+
+ if(options->LinkPadding != 0 && options->LinkPadding != 1) {
+ log(LOG_ERR,"LinkPadding option must be either 0 or 1.");
+ result = -1;
+ }
+
+ if(options->DirRebuildPeriod < 1) {
+ log(LOG_ERR,"DirRebuildPeriod option must be positive.");
+ result = -1;
+ }
+
+ if(options->DirFetchPeriod < 1) {
+ log(LOG_ERR,"DirFetchPeriod option must be positive.");
+ result = -1;
+ }
+
+ if(options->KeepalivePeriod < 1) {
+ log(LOG_ERR,"KeepalivePeriod option must be positive.");
+ result = -1;
+ }
+
+ return result;
}
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