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-rw-r--r--src/server.c154
1 files changed, 98 insertions, 56 deletions
diff --git a/src/server.c b/src/server.c
index 44b98f0..e73c51c 100644
--- a/src/server.c
+++ b/src/server.c
@@ -120,7 +120,7 @@ extern size_t outputs_n;
*(np) = (size_t)m__; \
} \
while (0)
-
+
/**
@@ -469,6 +469,82 @@ static inline int continue_send(size_t conn)
{
return send_message(conn, NULL, 0);
}
+
+
+/**
+ * Send a custom error without an error number
+ *
+ * @param ... The error description to send
+ * @return 1: Client disconnected
+ * 0: Success (possibily delayed)
+ * -1: An error occurred
+ */
+#define send_error(...) ((send_error)(conn, message_id, __VA_ARGS__))
+
+
+/**
+ * Send a custom error without an error number
+ *
+ * @param conn The index of the connection
+ * @param message_id The ID of the message to which this message is a response
+ * @param desc The error description to send
+ * @return 1: Client disconnected
+ * 0: Success (possibily delayed)
+ * -1: An error occurred
+ */
+static int (send_error)(size_t conn, const char* message_id, const char* desc)
+{
+ char* buf;
+ size_t n;
+
+ MAKE_MESSAGE(&buf, &n, 0,
+ "Command: error\n"
+ "In response to: %s\n"
+ "Error: custom\n"
+ "Length: %zu\n"
+ "\n"
+ "%s\n",
+ message_id, strlen(desc) + 1, desc);
+
+ return send_message(conn, buf, n);
+}
+
+
+/**
+ * Send a standard error
+ *
+ * @param ... The value of `errno`, 0 to indicate success
+ * @return 1: Client disconnected
+ * 0: Success (possibily delayed)
+ * -1: An error occurred
+ */
+#define send_errno(...) ((send_errno)(conn, message_id, __VA_ARGS__))
+
+
+/**
+ * Send a standard error
+ *
+ * @param conn The index of the connection
+ * @param message_id The ID of the message to which this message is a response
+ * @param number The value of `errno`, 0 to indicate success
+ * @return 1: Client disconnected
+ * 0: Success (possibily delayed)
+ * -1: An error occurred
+ */
+static int (send_errno)(size_t conn, const char* message_id, int number)
+{
+ char* buf;
+ size_t n;
+
+ MAKE_MESSAGE(&buf, &n, 0,
+ "Command: error\n"
+ "In response to: %s\n"
+ "Error: %i\n"
+ "\n",
+ message_id, number);
+
+ return send_message(conn, buf, n);
+}
/**
@@ -522,23 +598,11 @@ static int get_gamma_info(size_t conn, char* message_id, char* crtc)
const char* supported;
size_t n;
- if (crtc == NULL)
- return fprintf(stderr, "%s: ignoring incomplete Command: get-gamma-info message\n", argv0), 0;
+ if (crtc == NULL) return send_error("protocol error: 'CRTC' header omitted");
output = output_find_by_name(crtc, outputs, outputs_n);
if (output == NULL)
- {
- MAKE_MESSAGE(&buf, &n, 0,
- "Command: error\n"
- "In response to: %s\n"
- "Error: custom\n"
- "Length: 13\n"
- "\n"
- "No such CRTC\n",
- message_id);
-
- return send_message(conn, buf, n);
- }
+ return send_error("selected CRTC does not exist");
switch (output->depth)
{
@@ -598,13 +662,11 @@ static int get_gamma(size_t conn, char* message_id, char* crtc, char* coalesce,
size_t start, end, len, n, i;
char depth[3];
char tables[sizeof("Tables: \n") + 3 * sizeof(size_t)];
- const char *error = NULL;
- if ((crtc == NULL) ||
- (coalesce == NULL) ||
- (high_priority == NULL) ||
- (low_priority == NULL))
- return fprintf(stderr, "%s: ignoring incomplete Command: get-gamma message\n", argv0), 0;
+ if (crtc == NULL) return send_error("protocol error: 'CRTC' header omitted");
+ if (coalesce == NULL) return send_error("protocol error: 'Coalesce' header omitted");
+ if (high_priority == NULL) return send_error("protocol error: 'High priority' header omitted");
+ if (low_priority == NULL) return send_error("protocol error: 'Low priority' header omitted");
high = (int64_t)atoll(high_priority);
low = (int64_t)atoll(low_priority);
@@ -614,28 +676,13 @@ static int get_gamma(size_t conn, char* message_id, char* crtc, char* coalesce,
else if (!strcmp(coalesce, "no"))
coal = 0;
else
- return fprintf(stderr, "%s: ignoring Command: get-gamma message with bad Coalesce value: %s\n",
- argv0, coalesce), 0;
+ return send_error("protocol error: recognised value for 'Coalesce' header");
output = output_find_by_name(crtc, outputs, outputs_n);
if (output == NULL)
- error = "No such CRTC";
+ return send_error("selected CRTC does not exist");
else if (output->supported == LIBGAMMA_NO)
- error = "CRTC does not support gamma ramps";
-
- if (error != NULL)
- {
- MAKE_MESSAGE(&buf, &n, 0,
- "Command: error\n"
- "In response to: %s\n"
- "Error: custom\n"
- "Length: %zu\n"
- "\n"
- "%s\n",
- message_id, strlen(error) + 1, error);
-
- return send_message(conn, buf, n);
- }
+ return send_error("selected CRTC does not support gamma adjustments");
for (start = 0; start < output->table_size; start++)
if (output->table_filters[start].priority <= high)
@@ -742,10 +789,9 @@ static int set_gamma(size_t conn, char* message_id, char* crtc, char* priority,
int saved_errno;
ssize_t r;
- if ((crtc == NULL) ||
- (class == NULL) ||
- (lifespan == NULL))
- return fprintf(stderr, "%s: ignoring incomplete Command: set-gamma message\n", argv0), 0;
+ if (crtc == NULL) return send_error("protocol error: 'CRTC' header omitted");
+ if (class == NULL) return send_error("protocol error: 'Class' header omitted");
+ if (lifespan == NULL) return send_error("protocol error: 'Lifespan' header omitted");
filter.client = connections[conn];
filter.priority = priority == NULL ? 0 : (int64_t)atoll(priority);
@@ -753,17 +799,14 @@ static int set_gamma(size_t conn, char* message_id, char* crtc, char* priority,
output = output_find_by_name(crtc, outputs, outputs_n);
if (output == NULL)
- return fprintf(stderr, "%s: ignoring Command: set-gamma message with non-existing CRTC: %s\n",
- argv0, crtc), 0;
+ return send_error("CRTC does not exists");
p = strstr(class, "::");
if ((p == NULL) || (p == class))
- return fprintf(stderr, "%s: ignoring Command: set-gamma message with malformatted class: %s\n",
- argv0, class), 0;
+ return send_error("protocol error: malformatted value for 'Class' header");
q = strstr(p + 2, "::");
if ((q == NULL) || (q == p))
- return fprintf(stderr, "%s: ignoring Command: set-gamma message with malformatted class: %s\n",
- argv0, class), 0;
+ return send_error("protocol error: malformatted value for 'Class' header");
if (!strcmp(lifespan, "until-removal"))
filter.lifespan = LIFESPAN_UNTIL_REMOVAL;
@@ -772,8 +815,7 @@ static int set_gamma(size_t conn, char* message_id, char* crtc, char* priority,
else if (!strcmp(lifespan, "remove"))
filter.lifespan = LIFESPAN_REMOVE;
else
- return fprintf(stderr, "%s: ignoring Command: set-gamma message with bad lifetime: %s\n",
- argv0, lifespan), 0;
+ return send_error("protocol error: recognised value for 'Lifespan' header");
if (filter.lifespan == LIFESPAN_REMOVE)
{
@@ -785,10 +827,9 @@ static int set_gamma(size_t conn, char* message_id, char* crtc, char* priority,
"Lifespan: remove\n", argv0);
}
else if (msg->payload_size != output->ramps_size)
- return fprintf(stderr, "%s: ignoring Command: set-gamma message bad payload: size: %zu instead of %zu\n",
- argv0, msg->payload_size, output->ramps_size), 0;
- else if (priority == 0)
- return fprintf(stderr, "%s: ignoring incomplete Command: set-gamma message\n", argv0), 0;
+ return send_error("invalid payload: size of message payload does matched the expectancy");
+ else if (priority == NULL)
+ return send_error("protocol error: 'Priority' header omitted");
filter.class = memdup(class, strlen(class) + 1);
if (filter.class == NULL)
@@ -808,10 +849,11 @@ static int set_gamma(size_t conn, char* message_id, char* crtc, char* priority,
if (flush_filters(output, (size_t)r))
goto fail;
- return 0;
+ return send_errno(0);
fail:
saved_errno = errno;
+ send_errno(saved_errno);
free(filter.class);
free(filter.ramps);
errno = saved_errno;
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-30 19:38:24 +0000