parser: recover from errors in any block

Move error recovery to the common_block definition to handle errors
in any block. Queue those errors and abort parsing once a threshold
is reached.

With this in place, we can continue parsing when errors occur and
show all of them to the user at once.

tests/error.1:3:8-8: Error: syntax error, unexpected '{', expecting string
filter {
       ^
tests/error.1:4:13-13: Error: syntax error, unexpected newline
filter input
            ^
tests/error.1:5:17-17: Error: syntax error, unexpected newline
filter input tcp
                ^
tests/error.1:6:23-23: Error: syntax error, unexpected newline
filter input tcp dport

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index 28ce1aa6..2320a826 100644
--- a/src/main.c
+++ b/src/main.c
@@ -26,6 +26,7 @@
 #include <erec.h>
 #include <mnl.h>
 
+unsigned int max_errors = 10;
 unsigned int numeric_output;
 unsigned int handle_output;
 #ifdef DEBUG
@@ -219,7 +220,7 @@ int nft_run(void *scanner, struct parser_state *state, struct list_head *msgs)
 	int ret = 0;
 
 	ret = nft_parse(scanner, state);
-	if (ret != 0)
+	if (ret != 0 || state->nerrs > 0)
 		return -1;
 
 	memset(&ctx, 0, sizeof(ctx));