#include "system.h"
#include <assert.h>
+#include <sys/types.h>
+#include <utime.h>
#include "conf.h"
#include "crypto.h"
#include "packmsg.h"
/// Generate a path to the main configuration file.
-static void make_main_path(meshlink_handle_t *mesh, char *path, size_t len) {
- snprintf(path, len, "%s" SLASH "meshlink.conf", mesh->confbase);
+static void make_main_path(meshlink_handle_t *mesh, const char *conf_subdir, char *path, size_t len) {
+ snprintf(path, len, "%s" SLASH "%s" SLASH "meshlink.conf", mesh->confbase, conf_subdir);
}
/// Generate a path to a host configuration file.
-static void make_host_path(meshlink_handle_t *mesh, const char *name, char *path, size_t len) {
- snprintf(path, len, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+static void make_host_path(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, char *path, size_t len) {
+ snprintf(path, len, "%s" SLASH "%s" SLASH "hosts" SLASH "%s", mesh->confbase, conf_subdir, name);
}
/// Generate a path to an unused invitation file.
-static void make_invitation_path(meshlink_handle_t *mesh, const char *name, char *path, size_t len) {
- snprintf(path, len, "%s" SLASH "invitations" SLASH "%s", mesh->confbase, name);
+static void make_invitation_path(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, char *path, size_t len) {
+ snprintf(path, len, "%s" SLASH "%s" SLASH "invitations" SLASH "%s", mesh->confbase, conf_subdir, name);
}
/// Generate a path to a used invitation file.
-static void make_used_invitation_path(meshlink_handle_t *mesh, const char *name, char *path, size_t len) {
- snprintf(path, len, "%s" SLASH "invitations" SLASH "%s.used", mesh->confbase, name);
+static void make_used_invitation_path(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, char *path, size_t len) {
+ snprintf(path, len, "%s" SLASH "%s" SLASH "invitations" SLASH "%s.used", mesh->confbase, conf_subdir, name);
}
/// Remove a directory recursively
rmdir(dirname);
}
+static bool sync_path(const char *pathname) {
+ int fd = open(pathname, O_RDONLY);
+
+ if(fd < 0) {
+ logger(NULL, MESHLINK_ERROR, "Failed to open %s: %s\n", pathname, strerror(errno));
+ return false;
+ }
+
+ if(fsync(fd)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to sync %s: %s\n", pathname, strerror(errno));
+ close(fd);
+ return false;
+ }
+
+ if(close(fd)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to close %s: %s\n", pathname, strerror(errno));
+ close(fd);
+ return false;
+ }
+
+ return true;
+}
+
+/// Try decrypting the main configuration file from the given sub-directory.
+static bool main_config_decrypt(meshlink_handle_t *mesh, const char *conf_subdir) {
+ if(!mesh->config_key && !mesh->confbase && !conf_subdir) {
+ return false;
+ }
+
+ config_t config;
+
+ if(!main_config_read(mesh, conf_subdir, &config, mesh->config_key)) {
+ logger(mesh, MESHLINK_ERROR, "Could not read main configuration file");
+ return false;
+ }
+
+ packmsg_input_t in = {config.buf, config.len};
+
+ uint32_t version = packmsg_get_uint32(&in);
+ config_free(&config);
+
+ return version == MESHLINK_CONFIG_VERSION;
+}
+
/// Create a fresh configuration directory
-bool config_init(meshlink_handle_t *mesh) {
+bool config_init(meshlink_handle_t *mesh, const char *conf_subdir) {
if(!mesh->confbase) {
return true;
}
+ if(!conf_subdir) {
+ return false;
+ }
+
if(mkdir(mesh->confbase, 0700) && errno != EEXIST) {
logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
return false;
char path[PATH_MAX];
- // Remove meshlink.conf
- snprintf(path, sizeof(path), "%s" SLASH "meshlink.conf", mesh->confbase);
- unlink(path);
-
- // Remove any host config files
- snprintf(path, sizeof(path), "%s" SLASH "hosts", mesh->confbase);
+ // Create "current" sub-directory in the confbase
+ snprintf(path, sizeof(path), "%s" SLASH "%s", mesh->confbase, conf_subdir);
deltree(path);
- if(mkdir(path, 0700) && errno != EEXIST) {
+ if(mkdir(path, 0700)) {
logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", path, strerror(errno));
return false;
}
- // Remove any invitation files
- snprintf(path, sizeof(path), "%s" SLASH "invitations", mesh->confbase);
- deltree(path);
+ make_host_path(mesh, conf_subdir, "", path, sizeof(path));
+
+ if(mkdir(path, 0700)) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", path, strerror(errno));
+ return false;
+ }
- if(mkdir(path, 0700) && errno != EEXIST) {
+ make_invitation_path(mesh, conf_subdir, "", path, sizeof(path));
+
+ if(mkdir(path, 0700)) {
logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", path, strerror(errno));
return false;
}
}
/// Wipe an existing configuration directory
-bool config_destroy(const char *confbase) {
+bool config_destroy(const char *confbase, const char *conf_subdir) {
+ if(!confbase && !conf_subdir) {
+ return false;
+ }
+
+ struct stat st;
+
char path[PATH_MAX];
- // Remove meshlink.conf
- snprintf(path, sizeof(path), "%s" SLASH "meshlink.conf", confbase);
+ // Check the presence of configuration base sub directory.
+ snprintf(path, sizeof(path), "%s" SLASH "%s", confbase, conf_subdir);
- if(unlink(path)) {
+ if(stat(path, &st)) {
if(errno == ENOENT) {
- meshlink_errno = MESHLINK_ENOENT;
- return false;
+ return true;
} else {
+ logger(NULL, MESHLINK_ERROR, "Cannot stat %s: %s\n", path, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return false;
+ }
+ }
+
+ // Remove meshlink.conf
+ snprintf(path, sizeof(path), "%s" SLASH "%s" SLASH "meshlink.conf", confbase, conf_subdir);
+
+ if(unlink(path)) {
+ if(errno != ENOENT) {
logger(NULL, MESHLINK_ERROR, "Cannot delete %s: %s\n", path, strerror(errno));
meshlink_errno = MESHLINK_ESTORAGE;
return false;
}
}
- deltree(confbase);
+ snprintf(path, sizeof(path), "%s" SLASH "%s", confbase, conf_subdir);
+ deltree(path);
return true;
}
+static bool copytree(const char *src_dir_name, const void *src_key, const char *dst_dir_name, const void *dst_key) {
+ if(!src_dir_name || !dst_dir_name) {
+ return false;
+ }
+
+ DIR *src_dir = opendir(src_dir_name);
+
+ if(!src_dir) {
+ logger(NULL, MESHLINK_ERROR, "Could not open directory file %s\n", src_dir_name);
+ return false;
+ }
+
+ struct dirent *ent;
+
+ while((ent = readdir(src_dir))) {
+ if(ent->d_name[0] == '.') {
+ continue;
+ }
+
+ char src_filename[PATH_MAX];
+ char dst_filename[PATH_MAX];
+
+ snprintf(dst_filename, sizeof(dst_filename), "%s" SLASH "%s", dst_dir_name, ent->d_name);
+ snprintf(src_filename, sizeof(src_filename), "%s" SLASH "%s", src_dir_name, ent->d_name);
+
+ if(ent->d_type == DT_DIR) {
+
+ // Delete if already exists and create a new destination directory
+ deltree(dst_filename);
+
+ if(mkdir(dst_filename, 0700)) {
+ logger(NULL, MESHLINK_ERROR, "Could create directory %s\n", dst_filename);
+ return false;
+ }
+
+ if(!copytree(src_filename, src_key, dst_filename, dst_key)) {
+ logger(NULL, MESHLINK_ERROR, "Copying %s to %s failed\n", src_filename, dst_filename);
+ return false;
+ }
+
+ if(!sync_path(dst_filename)) {
+ return false;
+ }
+
+ } else if(ent->d_type == DT_REG) {
+ struct stat st;
+ config_t config;
+
+ if(stat(src_filename, &st)) {
+ logger(NULL, MESHLINK_ERROR, "Could not stat file `%s': %s\n", src_filename, strerror(errno));
+ return false;
+ }
+
+ FILE *f = fopen(src_filename, "r");
+
+ if(!f) {
+ logger(NULL, MESHLINK_ERROR, "Failed to open `%s': %s\n", src_filename, strerror(errno));
+ return false;
+ }
+
+ if(!config_read_file(NULL, f, &config, src_key)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to read `%s': %s\n", src_filename, strerror(errno));
+ fclose(f);
+ return false;
+ }
+
+ if(fclose(f)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to close `%s': %s\n", src_filename, strerror(errno));
+ config_free(&config);
+ return false;
+ }
+
+ f = fopen(dst_filename, "w");
+
+ if(!f) {
+ logger(NULL, MESHLINK_ERROR, "Failed to open `%s': %s", dst_filename, strerror(errno));
+ config_free(&config);
+ return false;
+ }
+
+ if(!config_write_file(NULL, f, &config, dst_key)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to write `%s': %s", dst_filename, strerror(errno));
+ config_free(&config);
+ fclose(f);
+ return false;
+ }
+
+ if(fclose(f)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to close `%s': %s", dst_filename, strerror(errno));
+ config_free(&config);
+ return false;
+ }
+
+ config_free(&config);
+
+ struct utimbuf times;
+ times.modtime = st.st_mtime;
+ times.actime = st.st_atime;
+
+ if(utime(dst_filename, ×)) {
+ logger(NULL, MESHLINK_ERROR, "Failed to utime `%s': %s", dst_filename, strerror(errno));
+ return false;
+ }
+ }
+ }
+
+ closedir(src_dir);
+ return true;
+}
+
+bool config_copy(meshlink_handle_t *mesh, const char *src_dir_name, const void *src_key, const char *dst_dir_name, const void *dst_key) {
+ char src_filename[PATH_MAX];
+ char dst_filename[PATH_MAX];
+
+ snprintf(dst_filename, sizeof(dst_filename), "%s" SLASH "%s", mesh->confbase, dst_dir_name);
+ snprintf(src_filename, sizeof(src_filename), "%s" SLASH "%s", mesh->confbase, src_dir_name);
+
+ if(main_config_exists(mesh, dst_dir_name)) {
+ deltree(dst_dir_name);
+ }
+
+ if(mkdir(dst_filename, 0700)) {
+ logger(NULL, MESHLINK_ERROR, "Could create directory %s\n", dst_filename);
+ return false;
+ }
+
+ return copytree(src_filename, src_key, dst_filename, dst_key);
+}
+
/// Check the presence of the main configuration file.
-bool main_config_exists(meshlink_handle_t *mesh) {
- if(!mesh->confbase) {
+bool main_config_exists(meshlink_handle_t *mesh, const char *conf_subdir) {
+ if(!mesh->confbase && !conf_subdir) {
return false;
}
char path[PATH_MAX];
- make_main_path(mesh, path, sizeof(path));
-
+ make_main_path(mesh, conf_subdir, path, sizeof(path));
return access(path, F_OK) == 0;
}
+bool config_rename(meshlink_handle_t *mesh, const char *old_conf_subdir, const char *new_conf_subdir) {
+ if(!mesh->confbase && !old_conf_subdir && !new_conf_subdir) {
+ return false;
+ }
+
+ char old_path[PATH_MAX];
+ char new_path[PATH_MAX];
+
+ snprintf(old_path, sizeof(old_path), "%s" SLASH "%s", mesh->confbase, old_conf_subdir);
+ snprintf(new_path, sizeof(new_path), "%s" SLASH "%s", mesh->confbase, new_conf_subdir);
+
+ return rename(old_path, new_path) == 0;
+}
+
+bool meshlink_confbase_exists(meshlink_handle_t *mesh) {
+ if(!mesh->confbase) {
+ return false;
+ }
+
+ bool confbase_exists = false;
+ bool confbase_decryptable = false;
+
+ if(main_config_exists(mesh, "current")) {
+ confbase_exists = true;
+
+ if(mesh->config_key && main_config_decrypt(mesh, "current")) {
+ confbase_decryptable = true;
+ }
+ }
+
+ if(mesh->config_key && !confbase_decryptable && main_config_exists(mesh, "new")) {
+ confbase_exists = true;
+
+ if(main_config_decrypt(mesh, "new")) {
+ if(!config_destroy(mesh->confbase, "current")) {
+ return false;
+ }
+
+ if(!config_rename(mesh, "new", "current")) {
+ return false;
+ }
+
+ confbase_decryptable = true;
+ }
+ }
+
+ if(mesh->config_key && !confbase_decryptable && main_config_exists(mesh, "old")) {
+ confbase_exists = true;
+
+ if(main_config_decrypt(mesh, "old")) {
+ if(!config_destroy(mesh->confbase, "current")) {
+ return false;
+ }
+
+ if(!config_rename(mesh, "old", "current")) {
+ return false;
+ }
+
+ confbase_decryptable = true;
+ }
+ }
+
+ // Cleanup if current is existing with old and new
+ if(confbase_exists && confbase_decryptable) {
+ config_destroy(mesh->confbase, "old");
+ config_destroy(mesh->confbase, "new");
+ }
+
+ return confbase_exists;
+}
+
/// Lock the main configuration file.
bool main_config_lock(meshlink_handle_t *mesh) {
if(!mesh->confbase) {
}
char path[PATH_MAX];
- make_main_path(mesh, path, sizeof(path));
+ make_main_path(mesh, "current", path, sizeof(path));
mesh->conffile = fopen(path, "r");
}
/// Read a configuration file from a FILE handle.
-bool config_read_file(meshlink_handle_t *mesh, FILE *f, config_t *config) {
- if(!mesh->confbase) {
- return false;
- }
-
- (void)mesh;
+bool config_read_file(meshlink_handle_t *mesh, FILE *f, config_t *config, const void *key) {
long len;
if(fseek(f, 0, SEEK_END) || !(len = ftell(f)) || fseek(f, 0, SEEK_SET)) {
return false;
}
- if(mesh->config_key) {
+ if(key) {
uint8_t *decrypted = xmalloc(len);
size_t decrypted_len = len;
chacha_poly1305_ctx_t *ctx = chacha_poly1305_init();
- chacha_poly1305_set_key(ctx, mesh->config_key);
+ chacha_poly1305_set_key(ctx, key);
if(len > 12 && chacha_poly1305_decrypt_iv96(ctx, buf, buf + 12, len - 12, decrypted, &decrypted_len)) {
chacha_poly1305_exit(ctx);
}
/// Write a configuration file to a FILE handle.
-bool config_write_file(meshlink_handle_t *mesh, FILE *f, const config_t *config) {
- if(!mesh->confbase) {
- return true;
- }
-
- if(mesh->config_key) {
+bool config_write_file(meshlink_handle_t *mesh, FILE *f, const config_t *config, const void *key) {
+ if(key) {
uint8_t buf[config->len + 16];
size_t len = sizeof(buf);
uint8_t seqbuf[12];
randomize(&seqbuf, sizeof(seqbuf));
chacha_poly1305_ctx_t *ctx = chacha_poly1305_init();
- chacha_poly1305_set_key(ctx, mesh->config_key);
+ chacha_poly1305_set_key(ctx, key);
bool success = false;
if(chacha_poly1305_encrypt_iv96(ctx, seqbuf, config->buf, config->len, buf, &len)) {
return false;
}
+ if(fsync(fileno(f))) {
+ logger(mesh, MESHLINK_ERROR, "Failed to sync file: %s\n", strerror(errno));
+ return false;
+ }
+
return true;
}
}
/// Check the presence of a host configuration file.
-bool config_exists(meshlink_handle_t *mesh, const char *name) {
- if(!mesh->confbase) {
+bool config_exists(meshlink_handle_t *mesh, const char *conf_subdir, const char *name) {
+ if(!mesh->confbase && !conf_subdir) {
return false;
}
char path[PATH_MAX];
- make_host_path(mesh, name, path, sizeof(path));
+ make_host_path(mesh, conf_subdir, name, path, sizeof(path));
return access(path, F_OK) == 0;
}
/// Read a host configuration file.
-bool config_read(meshlink_handle_t *mesh, const char *name, config_t *config) {
- if(!mesh->confbase) {
+bool config_read(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, config_t *config, void *key) {
+ if(!mesh->confbase && !conf_subdir) {
return false;
}
char path[PATH_MAX];
- make_host_path(mesh, name, path, sizeof(path));
+ make_host_path(mesh, conf_subdir, name, path, sizeof(path));
FILE *f = fopen(path, "r");
return false;
}
- if(!config_read_file(mesh, f, config)) {
+ if(!config_read_file(mesh, f, config, key)) {
logger(mesh, MESHLINK_ERROR, "Failed to read `%s': %s", path, strerror(errno));
fclose(f);
return false;
}
- fclose(f);
+ if(fclose(f)) {
+ logger(mesh, MESHLINK_ERROR, "Failed to close `%s': %s", path, strerror(errno));
+ return false;
+ }
+
return true;
}
-void config_scan_all(meshlink_handle_t *mesh, config_scan_action_t action) {
- if(!mesh->confbase) {
- return;
+bool config_scan_all(meshlink_handle_t *mesh, const char *conf_subdir, const char *conf_type, config_scan_action_t action, void *arg) {
+ if(!mesh->confbase && !conf_subdir && !conf_type) {
+ return false;
}
DIR *dir;
struct dirent *ent;
char dname[PATH_MAX];
- make_host_path(mesh, "", dname, sizeof(dname));
+ snprintf(dname, sizeof(dname), "%s" SLASH "%s" SLASH "%s", mesh->confbase, conf_subdir, conf_type);
dir = opendir(dname);
if(!dir) {
logger(mesh, MESHLINK_ERROR, "Could not open %s: %s", dname, strerror(errno));
meshlink_errno = MESHLINK_ESTORAGE;
- return;
+ return false;
}
while((ent = readdir(dir))) {
- action(mesh, ent->d_name);
+ if(ent->d_name[0] == '.') {
+ continue;
+ }
+
+ if(!action(mesh, ent->d_name, arg)) {
+ closedir(dir);
+ return false;
+ }
}
closedir(dir);
+ return true;
}
/// Write a host configuration file.
-bool config_write(meshlink_handle_t *mesh, const char *name, const config_t *config) {
- if(!mesh->confbase) {
+bool config_write(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, const config_t *config, void *key) {
+ if(!mesh->confbase && !conf_subdir && !name) {
return true;
}
char path[PATH_MAX];
- make_host_path(mesh, name, path, sizeof(path));
+ make_host_path(mesh, conf_subdir, name, path, sizeof(path));
FILE *f = fopen(path, "w");
return false;
}
- if(!config_write_file(mesh, f, config)) {
+ if(!config_write_file(mesh, f, config, key)) {
logger(mesh, MESHLINK_ERROR, "Failed to write `%s': %s", path, strerror(errno));
fclose(f);
return false;
}
- fclose(f);
+ if(fclose(f)) {
+ logger(mesh, MESHLINK_ERROR, "Failed to close `%s': %s", path, strerror(errno));
+ return false;
+ }
+
return true;
}
/// Read the main configuration file.
-bool main_config_read(meshlink_handle_t *mesh, config_t *config) {
- if(!mesh->confbase) {
+bool main_config_read(meshlink_handle_t *mesh, const char *conf_subdir, config_t *config, void *key) {
+ if(!mesh->confbase && !conf_subdir) {
return false;
}
char path[PATH_MAX];
- make_main_path(mesh, path, sizeof(path));
+ make_main_path(mesh, conf_subdir, path, sizeof(path));
FILE *f = fopen(path, "r");
return false;
}
- if(!config_read_file(mesh, f, config)) {
+ if(!config_read_file(mesh, f, config, key)) {
logger(mesh, MESHLINK_ERROR, "Failed to read `%s': %s", path, strerror(errno));
fclose(f);
return false;
}
- fclose(f);
+ if(fclose(f)) {
+ logger(mesh, MESHLINK_ERROR, "Failed to close `%s': %s", path, strerror(errno));
+ return false;
+ }
+
return true;
}
/// Write the main configuration file.
-bool main_config_write(meshlink_handle_t *mesh, const config_t *config) {
- if(!mesh->confbase) {
+bool main_config_write(meshlink_handle_t *mesh, const char *conf_subdir, const config_t *config, void *key) {
+ if(!mesh->confbase && !conf_subdir) {
return true;
}
char path[PATH_MAX];
- make_main_path(mesh, path, sizeof(path));
+ make_main_path(mesh, conf_subdir, path, sizeof(path));
FILE *f = fopen(path, "w");
return false;
}
- if(!config_write_file(mesh, f, config)) {
+ if(!config_write_file(mesh, f, config, key)) {
logger(mesh, MESHLINK_ERROR, "Failed to write `%s': %s", path, strerror(errno));
fclose(f);
return false;
}
- fclose(f);
+ if(fclose(f)) {
+ logger(mesh, MESHLINK_ERROR, "Failed to close `%s': %s", path, strerror(errno));
+ return false;
+ }
+
return true;
}
-/// Read an invitation file, and immediately delete it.
-bool invitation_read(meshlink_handle_t *mesh, const char *name, config_t *config) {
- if(!mesh->confbase) {
+/// Read an invitation file from the confbase sub-directory, and immediately delete it.
+bool invitation_read(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, config_t *config, void *key) {
+ if(!mesh->confbase && !conf_subdir) {
return false;
}
char path[PATH_MAX];
char used_path[PATH_MAX];
- make_invitation_path(mesh, name, path, sizeof(path));
- make_used_invitation_path(mesh, name, used_path, sizeof(used_path));
+ make_invitation_path(mesh, conf_subdir, name, path, sizeof(path));
+ make_used_invitation_path(mesh, conf_subdir, name, used_path, sizeof(used_path));
// Atomically rename the invitation file
if(rename(path, used_path)) {
return false;
}
- if(!config_read_file(mesh, f, config)) {
+ if(!config_read_file(mesh, f, config, key)) {
logger(mesh, MESHLINK_ERROR, "Failed to read `%s': %s", path, strerror(errno));
fclose(f);
unlink(used_path);
return false;
}
- fclose(f);
+ if(fclose(f)) {
+ logger(mesh, MESHLINK_ERROR, "Failed to close `%s': %s", path, strerror(errno));
+ return false;
+ }
+
unlink(used_path);
return true;
}
/// Write an invitation file.
-bool invitation_write(meshlink_handle_t *mesh, const char *name, const config_t *config) {
- if(!mesh->confbase) {
- return true;
+bool invitation_write(meshlink_handle_t *mesh, const char *conf_subdir, const char *name, const config_t *config, void *key) {
+ if(!mesh->confbase && !conf_subdir) {
+ return false;
}
char path[PATH_MAX];
- make_invitation_path(mesh, name, path, sizeof(path));
+ make_invitation_path(mesh, conf_subdir, name, path, sizeof(path));
FILE *f = fopen(path, "w");
return false;
}
- if(!config_write_file(mesh, f, config)) {
+ if(!config_write_file(mesh, f, config, key)) {
logger(mesh, MESHLINK_ERROR, "Failed to write `%s': %s", path, strerror(errno));
fclose(f);
return false;
}
- fclose(f);
+ if(fclose(f)) {
+ logger(mesh, MESHLINK_ERROR, "Failed to close `%s': %s", path, strerror(errno));
+ return false;
+ }
+
return true;
}
}
char path[PATH_MAX];
- make_invitation_path(mesh, "", path, sizeof(path));
+ make_invitation_path(mesh, "current", "", path, sizeof(path));
DIR *dir = opendir(path);
projects / meshlink / blobdiff