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-rw-r--r--cmake/config.cmake17
-rw-r--r--src/config.c9
-rw-r--r--src/config.y10
-rw-r--r--src/fastd.c27
-rw-r--r--src/fastd.h2
-rw-r--r--src/fastd_config.h.in3
-rw-r--r--src/status.c5
7 files changed, 57 insertions, 16 deletions
diff --git a/cmake/config.cmake b/cmake/config.cmake
index e6b70a2..049304f 100644
--- a/cmake/config.cmake
+++ b/cmake/config.cmake
@@ -18,6 +18,14 @@ set(USE_PMTU ${LINUX})
set(USE_PKTINFO ${LINUX})
set(USE_PACKET_MARK ${LINUX})
+
+if(ANDROID)
+ set(USE_USER FALSE)
+else(ANDROID)
+ set(USE_USER TRUE)
+endif(ANDROID)
+
+
# OSX doesn't support poll on devices...
set(USE_SELECT ${DARWIN})
@@ -36,9 +44,16 @@ set(ENABLE_LTO FALSE CACHE BOOL "Enable link-time optimization")
if(LINUX AND NOT ANDROID)
set(ENABLE_SYSTEMD TRUE CACHE BOOL "Enable systemd support")
+else(LINUX AND NOT ANDROID)
+ set(ENABLE_SYSTEMD FALSE)
endif(LINUX AND NOT ANDROID)
-set(WITH_CMDLINE_USER TRUE CACHE BOOL "Include support for setting user/group related options on the command line")
+if(USE_USER)
+ set(WITH_CMDLINE_USER TRUE CACHE BOOL "Include support for setting user/group related options on the command line")
+else(USE_USER)
+ set(WITH_CMDLINE_USER FALSE)
+endif(USE_USER)
+
set(WITH_CMDLINE_LOGGING TRUE CACHE BOOL "Include support for setting logging related options on the command line")
set(WITH_CMDLINE_OPERATION TRUE CACHE BOOL "Include support for setting options related to the VPN operation (like mode, interface, encryption method) on the command line")
set(WITH_CMDLINE_COMMANDS TRUE CACHE BOOL "Include support for setting handler scripts (e.g. --on-up) on the command line")
diff --git a/src/config.c b/src/config.c
index 86e7df6..d0d1d52 100644
--- a/src/config.c
+++ b/src/config.c
@@ -383,14 +383,10 @@ bool fastd_config_read(const char *filename, fastd_peer_group_t *peer_group, fas
/** Loads information about the configured user and group */
static void configure_user(void) {
+#ifdef USE_USER
conf.uid = getuid();
conf.gid = getgid();
-#ifdef __ANDROID__
- if (conf.user || conf.group) {
- exit_error("config error: setting user/group is not supported on Android");
- }
-#else
if (conf.user) {
struct passwd pwd, *pwdr;
size_t bufspace = 1024;
@@ -683,9 +679,12 @@ void fastd_config_release(void) {
free(conf.status_socket);
#endif
+#ifdef USE_USER
free(conf.user);
free(conf.group);
free(conf.groups);
+#endif
+
free(conf.ifname);
free(conf.secret);
free(conf.protocol_config);
diff --git a/src/config.y b/src/config.y
index c998a41..404ac1d 100644
--- a/src/config.y
+++ b/src/config.y
@@ -213,13 +213,23 @@ peer_group_statement:
;
user: TOK_STRING {
+#ifdef USE_USER
free(conf.user);
conf.user = fastd_strdup($1->str);
+#else
+ fastd_config_error(&@$, state, "user setting is not supported on this platform");
+ YYERROR;
+#endif
}
group: TOK_STRING {
+#ifdef USE_USER
free(conf.group);
conf.group = fastd_strdup($1->str);
+#else
+ fastd_config_error(&@$, state, "group setting is not supported on this platform");
+ YYERROR;
+#endif
}
drop_capabilities:
diff --git a/src/fastd.c b/src/fastd.c
index 5a71b6a..f05b43e 100644
--- a/src/fastd.c
+++ b/src/fastd.c
@@ -256,6 +256,8 @@ static inline void write_pid(void) {
return;
}
#endif
+
+#ifdef USE_USER
uid_t uid = geteuid();
gid_t gid = getegid();
@@ -265,28 +267,32 @@ static inline void write_pid(void) {
if (seteuid(conf.uid) < 0)
pr_debug_errno("seteuid");
}
+#endif
FILE *f = fopen(conf.pid_file, "w");
- if (f == NULL) {
- pr_error_errno("can't write PID file: fopen");
- goto end;
- }
+ if (f) {
+ if (fprintf(f, "%u", (unsigned)getpid()) < 0)
+ pr_error_errno("can't write PID file: fprintf");
- if (fprintf(f, "%u", (unsigned)getpid()) < 0)
- pr_error_errno("can't write PID file: fprintf");
+ if (fclose(f) < 0)
+ pr_warn_errno("fclose");
- if (fclose(f) < 0)
- pr_warn_errno("fclose");
+ }
+ else {
+ pr_error_errno("can't write PID file: fopen");
+ }
- end:
+#ifdef USE_USER
if (seteuid(uid) < 0)
pr_debug_errno("seteuid");
if (setegid(gid) < 0)
pr_debug_errno("setegid");
+#endif
}
/** Switches to the configured user */
static void set_user(void) {
+#ifdef USE_USER
if (conf.user || conf.group) {
if (setgid(conf.gid) < 0)
exit_errno("setgid");
@@ -296,10 +302,12 @@ static void set_user(void) {
pr_info("changed to UID %i, GID %i", (int)conf.uid, (int)conf.gid);
}
+#endif
}
/** Sets the configured user's supplementary groups */
static void set_groups(void) {
+#ifdef USE_USER
if (conf.groups) {
if (setgroups(conf.n_groups, conf.groups) < 0) {
if (errno != EPERM)
@@ -312,6 +320,7 @@ static void set_groups(void) {
pr_debug_errno("setgroups");
}
}
+#endif
}
/** Switches the user and drops all capabilities */
diff --git a/src/fastd.h b/src/fastd.h
index fc4acd1..f46e221 100644
--- a/src/fastd.h
+++ b/src/fastd.h
@@ -204,6 +204,7 @@ struct fastd_config {
fastd_drop_caps_t drop_caps; /**< Specifies if and when to drop capabilities */
+#ifdef USE_USER
char *user; /**< Specifies which user to switch to after initialization */
char *group; /**< Can specify an alternative group to switch to */
@@ -211,6 +212,7 @@ struct fastd_config {
gid_t gid; /**< The GID of the configured group */
size_t n_groups; /**< The number of supplementary groups of the user */
gid_t *groups; /**< The supplementary groups of the configured user */
+#endif
const fastd_protocol_t *protocol; /**< The handshake protocol */
fastd_string_stack_t *method_list; /**< The list of configured method names */
diff --git a/src/fastd_config.h.in b/src/fastd_config.h.in
index 5286992..03ccc56 100644
--- a/src/fastd_config.h.in
+++ b/src/fastd_config.h.in
@@ -71,6 +71,9 @@
/** Defined if the platform supports SO_MARK */
#cmakedefine USE_PACKET_MARK
+/** Defined if the platform supports settings users and groups */
+#cmakedefine USE_USER
+
/** Defined if the platform supports binding on IPv4 and IPv6 with a single socket */
#cmakedefine USE_MULTIAF_BIND
diff --git a/src/status.c b/src/status.c
index 7505ef9..3c82e0c 100644
--- a/src/status.c
+++ b/src/status.c
@@ -203,6 +203,7 @@ void fastd_status_init(void) {
return;
}
+#ifdef USE_USER
uid_t uid = geteuid();
gid_t gid = getegid();
@@ -212,7 +213,7 @@ void fastd_status_init(void) {
if (seteuid(conf.uid) < 0)
pr_debug_errno("seteuid");
}
-
+#endif
ctx.status_fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (ctx.status_fd < 0)
@@ -242,10 +243,12 @@ void fastd_status_init(void) {
exit_errno("fastd_status_init: listen");
+#ifdef USE_USER
if (seteuid(uid) < 0)
pr_debug_errno("seteuid");
if (setegid(gid) < 0)
pr_debug_errno("setegid");
+#endif
}
/** Closes the status socket */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 10:44:55 +0100