/* Copyright 2003-2004 Roger Dingledine * Copyright 2004-2005 Roger Dingledine, Nick Mathewson */ /* See LICENSE for licensing information */ /* $Id$ */ /** * \file util.h * \brief Headers for util.c **/ #ifndef __UTIL_H #define __UTIL_H #define UTIL_H_ID "$Id$" #include "orconfig.h" #include "torint.h" #include "compat.h" #include #ifdef HAVE_SYS_TIME_H #include #endif #ifdef HAVE_TIME_H #include #endif /* Replace assert() with a variant that sends failures to the log before * calling assert() normally. */ #ifdef NDEBUG /* Nobody should ever want to build with NDEBUG set. 99% of your asserts will * be outside the critical path anyway, so it's silly to disable bugchecking * throughout the entire program just because a few asserts are slowing you * down. Profile, optimize the critical path, and keep debugging on. * * And I'm not just saying that because some of our asserts check * security-critical properties. */ #error "Sorry; we don't support building with NDEBUG." #else #define tor_assert(expr) do { \ if (!(expr)) { \ log(LOG_ERR, "%s:%d: %s: Assertion %s failed; aborting.", \ _SHORT_FILE_, __LINE__, __FUNCTION__, #expr); \ fprintf(stderr,"%s:%d %s: Assertion %s failed; aborting.\n", \ _SHORT_FILE_, __LINE__, __FUNCTION__, #expr); \ abort(); /* unreached */ \ } } while (0) #endif #ifdef USE_DMALLOC #define DMALLOC_PARAMS const char *file, const int line, #define DMALLOC_ARGS _SHORT_FILE_, __LINE__, #else #define DMALLOC_PARAMS #define DMALLOC_ARGS #endif /** Define this if you want Tor to crash when any problem comes up, * so you can get a coredump and track things down. */ // #define tor_fragile_assert() tor_assert(0) #define tor_fragile_assert() /* Memory management */ void *_tor_malloc(DMALLOC_PARAMS size_t size); void *_tor_malloc_zero(DMALLOC_PARAMS size_t size); void *_tor_realloc(DMALLOC_PARAMS void *ptr, size_t size); char *_tor_strdup(DMALLOC_PARAMS const char *s); char *_tor_strndup(DMALLOC_PARAMS const char *s, size_t n); #ifdef USE_DMALLOC extern int dmalloc_free(const char *file, const int line, void *pnt, const int func_id); #define tor_free(p) do { \ if (p) { \ dmalloc_free(_SHORT_FILE_, __LINE__, (p), 0); \ (p)=NULL; \ } \ } while (0) #else #define tor_free(p) do { if (p) {free(p); (p)=NULL;} } while (0) #endif #define tor_malloc(size) _tor_malloc(DMALLOC_ARGS size) #define tor_malloc_zero(size) _tor_malloc_zero(DMALLOC_ARGS size) #define tor_realloc(ptr, size) _tor_realloc(DMALLOC_ARGS ptr, size) #define tor_strdup(s) _tor_strdup(DMALLOC_ARGS s) #define tor_strndup(s, n) _tor_strndup(DMALLOC_ARGS s, n) /* String manipulation */ #define HEX_CHARACTERS "0123456789ABCDEFabcdef" void tor_strlower(char *s); void tor_strupper(char *s); int strcmpstart(const char *s1, const char *s2); int strcasecmpstart(const char *s1, const char *s2); int strcmpend(const char *s1, const char *s2); int strcasecmpend(const char *s1, const char *s2); int tor_strstrip(char *s, const char *strip); typedef enum { ALWAYS_TERMINATE, NEVER_TERMINATE, TERMINATE_IF_EVEN } part_finish_rule_t; int tor_strpartition(char *dest, size_t dest_len, const char *s, const char *insert, size_t n, part_finish_rule_t rule); long tor_parse_long(const char *s, int base, long min, long max, int *ok, char **next); unsigned long tor_parse_ulong(const char *s, int base, unsigned long min, unsigned long max, int *ok, char **next); uint64_t tor_parse_uint64(const char *s, int base, uint64_t min, uint64_t max, int *ok, char **next); const char *hex_str(const char *from, size_t fromlen); const char *eat_whitespace(const char *s); const char *eat_whitespace_no_nl(const char *s); const char *find_whitespace(const char *s); void base16_encode(char *dest, size_t destlen, const char *src, size_t srclen); int base16_decode(char *dest, size_t destlen, const char *src, size_t srclen); /* Time helpers */ long tv_udiff(struct timeval *start, struct timeval *end); void tv_addms(struct timeval *a, long ms); void tv_add(struct timeval *a, struct timeval *b); int tv_cmp(struct timeval *a, struct timeval *b); time_t tor_timegm(struct tm *tm); #define RFC1123_TIME_LEN 29 void format_rfc1123_time(char *buf, time_t t); int parse_rfc1123_time(const char *buf, time_t *t); #define ISO_TIME_LEN 19 void format_local_iso_time(char *buf, time_t t); void format_iso_time(char *buf, time_t t); int parse_iso_time(const char *buf, time_t *t); /* File helpers */ int write_all(int fd, const char *buf, size_t count, int isSocket); int read_all(int fd, char *buf, size_t count, int isSocket); typedef enum { FN_ERROR, FN_NOENT, FN_FILE, FN_DIR} file_status_t; file_status_t file_status(const char *filename); typedef enum { CPD_NONE, CPD_CREATE, CPD_CHECK } cpd_check_t; int check_private_dir(const char *dirname, cpd_check_t check); int write_str_to_file(const char *fname, const char *str, int bin); int write_bytes_to_file(const char *fname, const char *str, size_t len, int bin); typedef struct sized_chunk_t { const char *bytes; size_t len; } sized_chunk_t; struct smartlist_t; int write_chunks_to_file(const char *fname, const struct smartlist_t *chunks, int bin); int append_bytes_to_file(const char *fname, const char *str, size_t len, int bin); char *read_file_to_str(const char *filename, int bin); char *parse_line_from_str(char *line, char **key_out, char **value_out); char *expand_filename(const char *filename); struct smartlist_t *tor_listdir(const char *dirname); /* Net helpers */ int is_internal_IP(uint32_t ip); int is_local_IP(uint32_t ip); int parse_addr_port(const char *addrport, char **address, uint32_t *addr, uint16_t *port); int parse_addr_and_port_range(const char *s, uint32_t *addr_out, uint32_t *mask_out, uint16_t *port_min_out, uint16_t *port_max_out); #define INET_NTOA_BUF_LEN 16 int tor_inet_ntoa(struct in_addr *in, char *buf, size_t buf_len); char *tor_dup_addr(uint32_t addr); int is_plausible_address(const char *name); int get_interface_address(uint32_t *addr); /* Process helpers */ void start_daemon(void); void finish_daemon(const char *desired_cwd); void write_pidfile(char *filename); #endif