X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fconf.c;h=7399c823a7dbe537e23b2dfeed4e0840092db23d;hp=1536b583a86270fff6ff1d9ebde60b2dfee61f42;hb=54ef13bf75a7a1e787716ce395ffe847fa74673f;hpb=9c2f805255fa36b05e8fe9391f639581d938b653 diff --git a/src/conf.c b/src/conf.c index 1536b583..7399c823 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 @@ -19,9 +19,10 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: conf.c,v 1.9.4.17 2000/10/24 15:46:15 guus Exp $ + $Id: conf.c,v 1.9.4.24 2000/11/29 14:24:40 zarq Exp $ */ +#include "config.h" #include #include @@ -32,13 +33,11 @@ #include #include +#include /* for cp */ #include "conf.h" #include "netutl.h" /* for strtoip */ -#include /* for cp */ -#include "config.h" -#include "connlist.h" #include "system.h" config_t *config = NULL; @@ -55,27 +54,26 @@ int sighup = 0; */ static internal_config_t hazahaza[] = { /* Main configuration file keywords */ - { "Name", tincname, TYPE_NAME }, - { "ConnectTo", connectto, TYPE_NAME }, - { "PingTimeout", pingtimeout, TYPE_INT }, - { "TapDevice", tapdevice, TYPE_NAME }, - { "TapSubnet", tapsubnet, TYPE_IP }, - { "PrivateKey", privatekey, TYPE_NAME }, - { "KeyExpire", keyexpire, TYPE_INT }, - { "Hostnames", resolve_dns, TYPE_BOOL }, - { "Interface", interface, TYPE_NAME }, - { "InterfaceIP", interfaceip, TYPE_IP }, + { "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", address, TYPE_NAME }, - { "Port", port, TYPE_INT }, - { "PublicKey", publickey, TYPE_NAME }, - { "Subnet", subnet, TYPE_IP }, /* Use IPv4 subnets only for now */ - { "RestrictHosts", restricthosts, TYPE_BOOL }, - { "RestrictSubnets", restrictsubnets, TYPE_BOOL }, - { "RestrictAddress", restrictaddress, TYPE_BOOL }, - { "RestrictPort", restrictport, TYPE_BOOL }, - { "IndirectData", indirectdata, TYPE_BOOL }, - { "TCPonly", tcponly, TYPE_BOOL }, + { "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 } }; @@ -85,7 +83,7 @@ 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)); @@ -131,6 +129,66 @@ cp } } +/* + Read exactly one line and strip the trailing newline if any. If the + file was on EOF, return NULL. Otherwise, return all the data in a + dynamically allocated buffer. +*/ +char *readline(FILE *fp) +{ + char *newline = NULL; + char *p; + char *line; /* The array that contains everything that has been read + so far */ + char *idx; /* Read into this pointer, which points to an offset + within line */ + size_t size, newsize; /* The size of the current array pointed to by + line */ + size_t maxlen; /* Maximum number of characters that may be read with + fgets. This is newsize - oldsize. */ + + if(feof(fp)) + return NULL; + + size = 100; + maxlen = size; + line = xmalloc(size); + idx = line; + for(;;) + { + errno = 0; + p = fgets(idx, maxlen, fp); + if(p == NULL) /* EOF or error */ + { + if(feof(fp)) + break; + + /* otherwise: error; let the calling function print an error + message if applicable */ + free(line); + return NULL; + } + + newline = strchr(p, '\n'); + if(newline == NULL) + /* We haven't yet read everything to the end of the line */ + { + newsize = size << 1; + line = xrealloc(line, newsize); + idx = &line[size - 1]; + maxlen = newsize - size + 1; + size = newsize; + } + else + { + *newline = '\0'; /* kill newline */ + break; /* yay */ + } + } + + return line; +} + /* Parse a configuration file and put the results in the configuration tree starting at *base. @@ -256,3 +314,69 @@ cp *base = NULL; cp } + +#define is_safe_file(p) 1 + +FILE *ask_and_safe_open(const char* filename, const char* what) +{ + FILE *r; + char *directory; + char *fn; + int len; + + /* 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 = xstrdup(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); /* Don't wait for a newline */ + if((fn = readline(stdin)) == NULL) + { + fprintf(stderr, _("Error while reading stdin: %m\n")); + return NULL; + } + if(strlen(fn) == 0) + /* User just pressed enter. */ + fn = xstrdup(filename); + } + + if((strchr(fn, '/') == NULL) || (fn[0] != '/')) + { + /* The directory is a relative path or a filename. */ + char *p; + + directory = get_current_dir_name(); + len = strlen(fn) + strlen(directory) + 2; /* 1 for the / */ + p = xmalloc(len); + snprintf(p, len, "%s/%s", directory, fn); + free(fn); + fn = p; + } + + 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\n"), + fn); + } + + free(fn); + free(directory); + + return r; +}