MAJOR: dns: save a copy of the DNS response in struct resolution
Prior this patch, the DNS responses were stored in a pre-allocated
memory area (allocated at HAProxy's startup).
The problem is that this memory is erased for each new DNS responses
received and processed.
This patch removes the global memory allocation (which was not thread
safe by the way) and introduces a storage of the dns response in the
struct
resolution.
The memory in the struct resolution is also reserved at start up and is
thread safe, since each resolution structure will have its own memory
area.
For now, we simply store the response and use it atomically per
response per server.
diff --git a/include/proto/dns.h b/include/proto/dns.h
index ffb1cac..14a6af1 100644
--- a/include/proto/dns.h
+++ b/include/proto/dns.h
@@ -32,7 +32,7 @@
struct task *dns_process_resolve(struct task *t);
int dns_init_resolvers(int close_socket);
uint16_t dns_rnd16(void);
-int dns_validate_dns_response(unsigned char *resp, unsigned char *bufend, struct dns_response_packet *dns_p);
+int dns_validate_dns_response(unsigned char *resp, unsigned char *bufend, struct dns_resolution *resolution);
int dns_get_ip_from_response(struct dns_response_packet *dns_p,
struct dns_options *dns_opts, void *currentip,
short currentip_sin_family,