X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fconf.c;h=37bfe9469639d3fd423ff57566ec97e2ccc96e99;hp=9bc25a79cecdfc517fbab696f3af33ca2ecedb2e;hb=3ff76eb10acc55b6f269c1075de6bbaa5bc83516;hpb=b1ecbf977722ec473fc8007acd39eb0de581de1a diff --git a/src/conf.c b/src/conf.c index 9bc25a79..37bfe946 100644 --- a/src/conf.c +++ b/src/conf.c @@ -1,6 +1,6 @@ /* conf.c -- configuration code - Copyright (C) 1998 Emphyrio, + Copyright (C) 1998 Robert van der Meulen Copyright (C) 1998,1999,2000 Ivo Timmermans 2000 Guus Sliepen 2000 Cris van Pelt @@ -19,10 +19,9 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: conf.c,v 1.9.4.6 2000/07/02 13:36:18 guus Exp $ + $Id: conf.c,v 1.9.4.23 2000/11/28 23:12:56 zarq Exp $ */ - #include "config.h" #include @@ -31,46 +30,51 @@ #include #include #include +#include #include +#include /* for cp */ #include "conf.h" #include "netutl.h" /* for strtoip */ -#include /* for cp */ +#include "config.h" #include "system.h" -config_t *config; +config_t *config = NULL; int debug_lvl = 0; int timeout = 0; /* seconds before timeout */ -char *configfilename = NULL; +char *confbase = NULL; /* directory in which all config files are */ +char *netname = NULL; /* name of the vpn network */ /* Will be set if HUP signal is received. It will be processed when it is safe. */ int sighup = 0; -typedef struct internal_config_t { - char *name; - enum which_t which; - int argtype; -} internal_config_t; - /* These are all the possible configurable values */ static internal_config_t hazahaza[] = { - { "AllowConnect", allowconnect, TYPE_BOOL }, /* Is not used anywhere. Remove? */ - { "ConnectTo", upstreamip, TYPE_NAME }, - { "ConnectPort", upstreamport, TYPE_INT }, - { "ListenPort", listenport, TYPE_INT }, - { "MyOwnVPNIP", myvpnip, TYPE_IP }, - { "MyVirtualIP", myvpnip, TYPE_IP }, /* an alias */ - { "Passphrases", passphrasesdir, TYPE_NAME }, - { "PingTimeout", pingtimeout, TYPE_INT }, - { "TapDevice", tapdevice, TYPE_NAME }, - { "KeyExpire", keyexpire, TYPE_INT }, - { "VpnMask", vpnmask, TYPE_IP }, - { "Hostnames", resolve_dns, TYPE_BOOL }, - { "IndirectData", indirectdata, TYPE_BOOL }, +/* Main configuration file keywords */ + { "Name", config_name, TYPE_NAME }, + { "ConnectTo", config_connectto, TYPE_NAME }, + { "PingTimeout", config_pingtimeout, TYPE_INT }, + { "TapDevice", config_tapdevice, TYPE_NAME }, + { "PrivateKey", config_privatekey, TYPE_NAME }, + { "KeyExpire", config_keyexpire, TYPE_INT }, + { "Hostnames", config_hostnames, TYPE_BOOL }, + { "Interface", config_interface, TYPE_NAME }, + { "InterfaceIP", config_interfaceip, TYPE_IP }, +/* Host configuration file keywords */ + { "Address", config_address, TYPE_NAME }, + { "Port", config_port, TYPE_INT }, + { "PublicKey", config_publickey, TYPE_NAME }, + { "Subnet", config_subnet, TYPE_IP }, /* Use IPv4 subnets only for now */ + { "RestrictHosts", config_restricthosts, TYPE_BOOL }, + { "RestrictSubnets", config_restrictsubnets, TYPE_BOOL }, + { "RestrictAddress", config_restrictaddress, TYPE_BOOL }, + { "RestrictPort", config_restrictport, TYPE_BOOL }, + { "IndirectData", config_indirectdata, TYPE_BOOL }, + { "TCPonly", config_tcponly, TYPE_BOOL }, { NULL, 0, 0 } }; @@ -80,12 +84,12 @@ static internal_config_t hazahaza[] = { config_t * add_config_val(config_t **cfg, int argtype, char *val) { - config_t *p, *r; + config_t *p; char *q; cp p = (config_t*)xmalloc(sizeof(*p)); p->data.val = 0; - + switch(argtype) { case TYPE_INT: @@ -113,52 +117,52 @@ cp if(p->data.val) { - if(*cfg) - { - r = *cfg; - while(r->next) - r = r->next; - r->next = p; - } - else - *cfg = p; - p->next = NULL; + p->next = *cfg; + *cfg = p; +cp return p; } - - free(p); + else + { + free(p); cp - return NULL; + return NULL; + } } /* - Get variable from a section in a configfile. returns -1 on failure. + Parse a configuration file and put the results in the configuration tree + starting at *base. */ -int -readconfig(const char *fname, FILE *fp) +int read_config_file(config_t **base, const char *fname) { - char *line, *temp_buf; + int err = -1; + FILE *fp; + char line[MAXBUFSIZE]; /* There really should not be any line longer than this... */ char *p, *q; int i, lineno = 0; config_t *cfg; cp - line = (char *)xmalloc(80 * sizeof(char)); - temp_buf = (char *)xmalloc(80 * sizeof(char)); - + if((fp = fopen (fname, "r")) == NULL) + { + return -1; + } + for(;;) { - if(fgets(line, 80, fp) == NULL) - return 0; + if(fgets(line, MAXBUFSIZE, fp) == NULL) + { + err = 0; + break; + } + + lineno++; - while(!index(line, '\n')) + if(!index(line, '\n')) { - fgets(temp_buf, (strlen(line)+1) * 80, fp); - if(!temp_buf) - break; - strcat(line, temp_buf); - line = (char *)xrealloc(line, (strlen(line)+1) * sizeof(char)); + syslog(LOG_ERR, _("Line %d too long while reading config file %s"), lineno, fname); + break; } - lineno++; if((p = strtok(line, "\t\n\r =")) == NULL) continue; /* no tokens on this line */ @@ -172,97 +176,74 @@ cp if(!hazahaza[i].name) { - fprintf(stderr, _("%s: %d: Invalid variable name `%s'.\n"), - fname, lineno, p); - return -1; + syslog(LOG_ERR, _("Invalid variable name on line %d while reading config file %s"), + lineno, fname); + break; } if(((q = strtok(NULL, "\t\n\r =")) == NULL) || q[0] == '#') { - fprintf(stderr, _("%s: %d: No value given for `%s'.\n"), - fname, lineno, hazahaza[i].name); - return -1; + fprintf(stderr, _("No value for variable on line %d while reading config file %s"), + lineno, fname); + break; } - cfg = add_config_val(&config, hazahaza[i].argtype, q); + cfg = add_config_val(base, hazahaza[i].argtype, q); if(cfg == NULL) { - fprintf(stderr, _("%s: %d: Invalid value `%s' for variable `%s'.\n"), - fname, lineno, q, hazahaza[i].name); - return -1; + fprintf(stderr, _("Invalid value for variable on line %d while reading config file %s"), + lineno, fname); + break; } cfg->which = hazahaza[i].which; if(!config) config = cfg; } + + fclose (fp); cp - return 0; + return err; } -/* - wrapper function for readconfig -*/ -int -read_config_file(const char *fname) +int read_server_config() { - int err; - FILE *fp; + char *fname; + int x; cp - if((fp = fopen (fname, "r")) == NULL) + asprintf(&fname, "%s/tinc.conf", confbase); + x = read_config_file(&config, fname); + if(x != 0) { - fprintf(stderr, _("Could not open %s: %s\n"), fname, sys_errlist[errno]); - return 1; + fprintf(stderr, _("Failed to read `%s': %m\n"), + fname); } - - err = readconfig(fname, fp); - fclose (fp); + free(fname); cp - return err; + return x; } /* Look up the value of the config option type */ -const config_t * -get_config_val(which_t type) +const config_t *get_config_val(config_t *p, which_t type) { - config_t *p; cp - for(p = config; p != NULL; p = p->next) + for(; p != NULL; p = p->next) if(p->which == type) - return p; + break; cp - /* Not found */ - return NULL; -} - -/* - Support for multiple config lines. - Index is used to get a specific value, 0 being the first, 1 the second etc. -*/ -const config_t * -get_next_config_val(which_t type, int index) -{ - config_t *p; -cp - for(p = config; p != NULL; p = p->next) - if(p->which == type) - if(--index < 0) - return p; -cp - /* Not found */ - return NULL; + return p; } /* Remove the complete configuration tree. */ -void clear_config() +void clear_config(config_t **base) { config_t *p, *next; cp - for(p = config; p != NULL; p = next) + for(p = *base; p != NULL; p = next) { next = p->next; if(p->data.ptr && (p->argtype == TYPE_NAME)) @@ -271,6 +252,50 @@ cp } free(p); } - config = NULL; + *base = NULL; cp } + +#define is_safe_file(p) 1 + +FILE *ask_and_safe_open(const char* filename) +{ + FILE *r; + char *directory; + char *fn; + int len; + + if(!isatty(0)) + { + /* 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. */ + directory = "."; /* get_current_directory */ + } + else + { + directory = "."; + } + + len = strlen(filename) + strlen(directory) + 2; /* 1 for the / */ + fn = xmalloc(len); + snprintf(fn, len, "%s/%s", directory, filename); + + if(!is_safe_file(fn)) + { + fprintf(stderr, _("The file `%s' (or any of the leading directories) has unsafe permissions.\n" + "I will not create or overwrite this file.\n"), + fn); + return NULL; + } + + if((r = fopen(fn, "w")) == NULL) + { + fprintf(stderr, _("Error opening file `%s': %m"), + fn); + } + + free(fn); + + return r; +}