X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fconf.c;h=aa22c47ff9a67807e2721ba7d7671a3bcbfe7a0e;hb=656a7bca4fd4acac5c3411087a6ed62fa4b7fa81;hp=42866b83cb21ddb1b17550ce55dee6193e984a86;hpb=103543aa2c15d9f1e2aa313a2e593a7524cce484;p=meshlink diff --git a/src/conf.c b/src/conf.c index 42866b83..aa22c47f 100644 --- a/src/conf.c +++ b/src/conf.c @@ -1,9 +1,6 @@ /* conf.c -- configuration code - Copyright (C) 1998 Robert van der Meulen - 1998-2005 Ivo Timmermans - 2000-2009 Guus Sliepen - 2000 Cris van Pelt + Copyright (C) 2014 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -23,20 +20,16 @@ #include "system.h" #include "splay_tree.h" +#include "connection.h" #include "conf.h" +#include "list.h" #include "logger.h" -#include "netutl.h" /* for str2address */ +#include "meshlink_internal.h" +#include "netutl.h" /* for str2address */ #include "protocol.h" -#include "utils.h" /* for cp */ +#include "utils.h" /* for cp */ #include "xalloc.h" -splay_tree_t *config_tree; - -int pinginterval = 0; /* seconds between pings */ -int pingtimeout = 0; /* seconds to wait for response */ -char *confbase = NULL; /* directory in which all config files are */ -char *netname = NULL; /* name of the vpn network */ - static int config_compare(const config_t *a, const config_t *b) { int result; @@ -50,20 +43,20 @@ static int config_compare(const config_t *a, const config_t *b) { if(result) return result; else - return strcmp(a->file, b->file); + return a->file ? strcmp(a->file, b->file) : 0; } -void init_configuration(splay_tree_t ** config_tree) { +void init_configuration(splay_tree_t **config_tree) { *config_tree = splay_alloc_tree((splay_compare_t) config_compare, (splay_action_t) free_config); } -void exit_configuration(splay_tree_t ** config_tree) { +void exit_configuration(splay_tree_t **config_tree) { splay_delete_tree(*config_tree); *config_tree = NULL; } config_t *new_config(void) { - return xmalloc_and_zero(sizeof(config_t)); + return xzalloc(sizeof(config_t)); } void free_config(config_t *cfg) { @@ -87,7 +80,7 @@ config_t *lookup_config(splay_tree_t *config_tree, char *variable) { config_t cfg, *found; cfg.variable = variable; - cfg.file = ""; + cfg.file = NULL; cfg.line = 0; found = splay_search_closest_greater(config_tree, &cfg); @@ -131,7 +124,7 @@ bool get_config_bool(const config_t *cfg, bool *result) { return true; } - logger(LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d", + logger(DEBUG_ALWAYS, LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d", cfg->variable, cfg->file, cfg->line); return false; @@ -144,7 +137,7 @@ bool get_config_int(const config_t *cfg, int *result) { if(sscanf(cfg->value, "%d", result) == 1) return true; - logger(LOG_ERR, "Integer expected for configuration variable %s in %s line %d", + logger(DEBUG_ALWAYS, LOG_ERR, "Integer expected for configuration variable %s in %s line %d", cfg->variable, cfg->file, cfg->line); return false; @@ -172,40 +165,12 @@ bool get_config_address(const config_t *cfg, struct addrinfo **result) { return true; } - logger(LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d", + logger(DEBUG_ALWAYS, LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d", cfg->variable, cfg->file, cfg->line); return false; } -bool get_config_subnet(const config_t *cfg, subnet_t ** result) { - subnet_t subnet = {0}; - - if(!cfg) - return false; - - if(!str2net(&subnet, cfg->value)) { - logger(LOG_ERR, "Subnet expected for configuration variable %s in %s line %d", - cfg->variable, cfg->file, cfg->line); - return false; - } - - /* Teach newbies what subnets are... */ - - if(((subnet.type == SUBNET_IPV4) - && !maskcheck(&subnet.net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof subnet.net.ipv4.address)) - || ((subnet.type == SUBNET_IPV6) - && !maskcheck(&subnet.net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof subnet.net.ipv6.address))) { - logger(LOG_ERR, "Network address and prefix length do not match for configuration variable %s in %s line %d", - cfg->variable, cfg->file, cfg->line); - return false; - } - - *(*result = new_subnet()) = subnet; - - return true; -} - /* Read exactly one line and strip the trailing newline if any. */ @@ -224,27 +189,60 @@ static char *readline(FILE * fp, char *buf, size_t buflen) { newline = strchr(p, '\n'); if(!newline) - return NULL; + return buf; - *newline = '\0'; /* kill newline */ - if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */ + /* kill newline and carriage return if necessary */ + *newline = '\0'; + if(newline > p && newline[-1] == '\r') newline[-1] = '\0'; return buf; } +config_t *parse_config_line(char *line, const char *fname, int lineno) { + config_t *cfg; + int len; + char *variable, *value, *eol; + variable = value = line; + + eol = line + strlen(line); + while(strchr("\t ", *--eol)) + *eol = '\0'; + + len = strcspn(value, "\t ="); + value += len; + value += strspn(value, "\t "); + if(*value == '=') { + value++; + value += strspn(value, "\t "); + } + variable[len] = '\0'; + + if(!*value) { + const char err[] = "No value for variable"; + logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' on line %d while reading config file %s", + err, variable, lineno, fname); + return NULL; + } + + cfg = new_config(); + cfg->variable = xstrdup(variable); + cfg->value = xstrdup(value); + cfg->file = xstrdup(fname); + cfg->line = lineno; + + return cfg; +} + /* Parse a configuration file and put the results in the configuration tree starting at *base. */ -int read_config_file(splay_tree_t *config_tree, const char *fname) { - int err = -2; /* Parse error */ +bool read_config_file(splay_tree_t *config_tree, const char *fname) { FILE *fp; char buffer[MAX_STRING_SIZE]; char *line; - char *variable, *value, *eol; int lineno = 0; - int len; bool ignore = false; config_t *cfg; bool result = false; @@ -252,7 +250,7 @@ int read_config_file(splay_tree_t *config_tree, const char *fname) { fp = fopen(fname, "r"); if(!fp) { - logger(LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno)); + logger(DEBUG_ALWAYS, LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno)); return false; } @@ -275,40 +273,15 @@ int read_config_file(splay_tree_t *config_tree, const char *fname) { ignore = false; continue; } - + if(!strncmp(line, "-----BEGIN", 10)) { ignore = true; continue; } - variable = value = line; - - eol = line + strlen(line); - while(strchr("\t ", *--eol)) - *eol = '\0'; - - len = strcspn(value, "\t ="); - value += len; - value += strspn(value, "\t "); - if(*value == '=') { - value++; - value += strspn(value, "\t "); - } - variable[len] = '\0'; - - - if(!*value) { - logger(LOG_ERR, "No value for variable `%s' on line %d while reading config file %s", - variable, lineno, fname); + cfg = parse_config_line(line, fname, lineno); + if (!cfg) break; - } - - cfg = new_config(); - cfg->variable = xstrdup(variable); - cfg->value = xstrdup(value); - cfg->file = xstrdup(fname); - cfg->line = lineno; - config_add(config_tree, cfg); } @@ -317,109 +290,41 @@ int read_config_file(splay_tree_t *config_tree, const char *fname) { return result; } -bool read_server_config() { - char *fname; +bool read_server_config(meshlink_handle_t *mesh) { + char filename[PATH_MAX]; bool x; - xasprintf(&fname, "%s/tinc.conf", confbase); - x = read_config_file(config_tree, fname); - - if(!x) { /* System error: complain */ - logger(LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno)); - } + snprintf(filename, PATH_MAX,"%s" SLASH "meshlink.conf", mesh->confbase); + errno = 0; + x = read_config_file(mesh->config, filename); - free(fname); + if(!x && errno) + logger(DEBUG_ALWAYS, LOG_ERR, "Failed to read `%s': %s", filename, strerror(errno)); return x; } -FILE *ask_and_open(const char *filename, const char *what) { - FILE *r; - char *directory; - char line[PATH_MAX]; - const char *fn; - - /* Check stdin and stdout */ - if(!isatty(0) || !isatty(1)) { - /* Argh, they are running us from a script or something. Write - the files to the current directory and let them burn in hell - for ever. */ - fn = filename; - } else { - /* Ask for a file and/or directory name. */ - fprintf(stdout, "Please enter a file to save %s to [%s]: ", - what, filename); - fflush(stdout); - - fn = readline(stdin, line, sizeof line); - - if(!fn) { - fprintf(stderr, "Error while reading stdin: %s\n", - strerror(errno)); - return NULL; - } - - if(!strlen(fn)) - /* User just pressed enter. */ - fn = filename; - } - -#ifdef HAVE_MINGW - if(fn[0] != '\\' && fn[0] != '/' && !strchr(fn, ':')) { -#else - if(fn[0] != '/') { -#endif - /* The directory is a relative path or a filename. */ - char *p; - - directory = get_current_dir_name(); - xasprintf(&p, "%s/%s", directory, fn); - free(directory); - fn = p; - } - - umask(0077); /* Disallow everything for group and other */ +bool read_host_config(meshlink_handle_t *mesh, splay_tree_t *config_tree, const char *name) { + char filename[PATH_MAX]; + bool x; - /* Open it first to keep the inode busy */ + snprintf(filename,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name); + x = read_config_file(config_tree, filename); - r = fopen(fn, "r+") ?: fopen(fn, "w+"); + return x; +} - if(!r) { - fprintf(stderr, "Error opening file `%s': %s\n", - fn, strerror(errno)); - return NULL; - } +bool append_config_file(meshlink_handle_t *mesh, const char *name, const char *key, const char *value) { + char filename[PATH_MAX]; + snprintf(filename,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name); - return r; -} + FILE *fp = fopen(filename, "a"); -bool disable_old_keys(FILE *f) { - char buf[100]; - long pos; - bool disabled = false; - - rewind(f); - pos = ftell(f); - - while(fgets(buf, sizeof buf, f)) { - if(!strncmp(buf, "-----BEGIN RSA", 14)) { - buf[11] = 'O'; - buf[12] = 'L'; - buf[13] = 'D'; - fseek(f, pos, SEEK_SET); - fputs(buf, f); - disabled = true; - } - else if(!strncmp(buf, "-----END RSA", 12)) { - buf[ 9] = 'O'; - buf[10] = 'L'; - buf[11] = 'D'; - fseek(f, pos, SEEK_SET); - fputs(buf, f); - disabled = true; - } - pos = ftell(f); + if(!fp) { + logger(DEBUG_ALWAYS, LOG_ERR, "Cannot open config file %s: %s", filename, strerror(errno)); + } else { + fclose(fp); } - return disabled; + return fp != NULL; }