Add mg_ prefix to mongoose sources

CL: none

PUBLISHED_FROM=d6ebe5fa88c61ae3b8569897d9b09d54610bec73

src/mg_dns_server.c

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2014 Cesanta Software Limited
+ * All rights reserved
+ */
+
+#if MG_ENABLE_DNS_SERVER
+
+#include "mongoose/src/mg_internal.h"
+#include "mongoose/src/dns-server.h"
+
+struct mg_dns_reply mg_dns_create_reply(struct mbuf *io,
+                                        struct mg_dns_message *msg) {
+  struct mg_dns_reply rep;
+  rep.msg = msg;
+  rep.io = io;
+  rep.start = io->len;
+
+  /* reply + recursion allowed */
+  msg->flags |= 0x8080;
+  mg_dns_copy_questions(io, msg);
+
+  msg->num_answers = 0;
+  return rep;
+}
+
+void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r) {
+  size_t sent = r->io->len - r->start;
+  mg_dns_insert_header(r->io, r->start, r->msg);
+  if (!(nc->flags & MG_F_UDP)) {
+    uint16_t len = htons((uint16_t) sent);
+    mbuf_insert(r->io, r->start, &len, 2);
+  }
+
+  if (&nc->send_mbuf != r->io) {
+    mg_send(nc, r->io->buf + r->start, r->io->len - r->start);
+    r->io->len = r->start;
+  }
+}
+
+int mg_dns_reply_record(struct mg_dns_reply *reply,
+                        struct mg_dns_resource_record *question,
+                        const char *name, int rtype, int ttl, const void *rdata,
+                        size_t rdata_len) {
+  struct mg_dns_message *msg = (struct mg_dns_message *) reply->msg;
+  char rname[512];
+  struct mg_dns_resource_record *ans = &msg->answers[msg->num_answers];
+  if (msg->num_answers >= MG_MAX_DNS_ANSWERS) {
+    return -1; /* LCOV_EXCL_LINE */
+  }
+
+  if (name == NULL) {
+    name = rname;
+    rname[511] = 0;
+    mg_dns_uncompress_name(msg, &question->name, rname, sizeof(rname) - 1);
+  }
+
+  *ans = *question;
+  ans->kind = MG_DNS_ANSWER;
+  ans->rtype = rtype;
+  ans->ttl = ttl;
+
+  if (mg_dns_encode_record(reply->io, ans, name, strlen(name), rdata,
+                           rdata_len) == -1) {
+    return -1; /* LCOV_EXCL_LINE */
+  };
+
+  msg->num_answers++;
+  return 0;
+}
+
+#endif /* MG_ENABLE_DNS_SERVER */