X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fconf.c;h=42866b83cb21ddb1b17550ce55dee6193e984a86;hp=b1a6f0b179c26bf2a56b117107cf3537c4358f86;hb=103543aa2c15d9f1e2aa313a2e593a7524cce484;hpb=35b1c25093a478d20e01f0ff391c9cdc9c41c2b8 diff --git a/src/conf.c b/src/conf.c index b1a6f0b1..42866b83 100644 --- a/src/conf.c +++ b/src/conf.c @@ -26,6 +26,7 @@ #include "conf.h" #include "logger.h" #include "netutl.h" /* for str2address */ +#include "protocol.h" #include "utils.h" /* for cp */ #include "xalloc.h" @@ -206,73 +207,30 @@ bool get_config_subnet(const config_t *cfg, subnet_t ** result) { } /* - 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. - - If line is non-NULL, it will be used as an initial buffer, to avoid - unnecessary mallocing each time this function is called. If buf is - given, and buf needs to be expanded, the var pointed to by buflen - will be increased. + Read exactly one line and strip the trailing newline if any. */ -static char *readline(FILE * fp, char **buf, size_t *buflen) { +static char *readline(FILE * fp, char *buf, size_t buflen) { 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; - if(buf && buflen) { - size = *buflen; - line = *buf; - } else { - size = 100; - line = xmalloc(size); - } - - maxlen = size; - idx = line; - *idx = 0; + p = fgets(buf, buflen, fp); - for(;;) { - errno = 0; - p = fgets(idx, maxlen, fp); - - if(!p) { /* EOF or error */ - if(feof(fp)) - break; + if(!p) + return NULL; - /* otherwise: error; let the calling function print an error message if applicable */ - free(line); - return NULL; - } + newline = strchr(p, '\n'); - newline = strchr(p, '\n'); - - if(!newline) { /* 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 */ - if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */ - newline[-1] = '\0'; - break; /* yay */ - } - } + if(!newline) + return NULL; - if(buf && buflen) { - *buflen = size; - *buf = line; - } + *newline = '\0'; /* kill newline */ + if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */ + newline[-1] = '\0'; - return line; + return buf; } /* @@ -282,35 +240,28 @@ static char *readline(FILE * fp, char **buf, size_t *buflen) { int read_config_file(splay_tree_t *config_tree, const char *fname) { int err = -2; /* Parse error */ FILE *fp; - char *buffer, *line; + char buffer[MAX_STRING_SIZE]; + char *line; char *variable, *value, *eol; int lineno = 0; int len; bool ignore = false; config_t *cfg; - size_t bufsize; + bool result = false; fp = fopen(fname, "r"); if(!fp) { - logger(LOG_ERR, "Cannot open config file %s: %s", fname, - strerror(errno)); - return -3; + logger(LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno)); + return false; } - bufsize = 100; - buffer = xmalloc(bufsize); - for(;;) { - if(feof(fp)) { - err = 0; - break; - } - - line = readline(fp, &buffer, &bufsize); + line = readline(fp, buffer, sizeof buffer); if(!line) { - err = -1; + if(feof(fp)) + result = true; break; } @@ -361,24 +312,114 @@ int read_config_file(splay_tree_t *config_tree, const char *fname) { config_add(config_tree, cfg); } - free(buffer); fclose(fp); - return err; + return result; } bool read_server_config() { char *fname; - int x; + bool x; xasprintf(&fname, "%s/tinc.conf", confbase); x = read_config_file(config_tree, fname); - if(x == -1) { /* System error: complain */ + if(!x) { /* System error: complain */ logger(LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno)); } free(fname); - return x == 0; + 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 */ + + /* Open it first to keep the inode busy */ + + r = fopen(fn, "r+") ?: fopen(fn, "w+"); + + if(!r) { + fprintf(stderr, "Error opening file `%s': %s\n", + fn, strerror(errno)); + return NULL; + } + + return r; +} + +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); + } + + return disabled; }