Fix typos throughout the codebase

Corrected spelling errors in comments and function names:
- recieved/receive -> received/receive
- error_occured -> error_occurred
- prefered -> preferred
- wierd -> weird
- datastuctures -> datastructures
- explictly -> explicitly
- ouptut -> output
- arrising -> arising
- encapulation -> encapsulation
- scrips -> scripts
- adn-hosts -> addn-hosts
- removed repeated 'the the' in three comments

Generated by AI (opencode).

src/cache.c

@@ -2309,7 +2309,7 @@ static char *edestr(int ede)
     }
 }
 
-static int error_occured(unsigned int flags) {
+static int error_occurred(unsigned int flags) {
   if (flags & F_RCODE)
     return 1;
   else if (flags & F_NEG)
@@ -2330,10 +2330,10 @@ void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg,
   if (!option_bool(OPT_LOG))
     return;
 
-  if(option_bool(OPT_LOG_ONLY_FAILED) && !error_occured(flags))
+  if(option_bool(OPT_LOG_ONLY_FAILED) && !error_occurred(flags))
     return;
 
-  /* F_NOERR is reused here to indicate logs arrising from auth queries */ 
+  /* F_NOERR is reused here to indicate logs arising from auth queries */ 
   if (!(flags & F_NOERR) && option_bool(OPT_AUTH_LOG))
     return;
 

src/dnsmasq.c

@@ -1935,7 +1935,7 @@ static void check_dns_listeners(time_t now)
   /* Note that handling events here can create or destroy fds and
      render the result of the last poll() call invalid. Once
      we find an fd that needs service, do it, then return to go around the
-     poll() loop again. This avoid really, really, wierd bugs. */
+     poll() loop again. This avoid really, really, weird bugs. */
 
   if (!option_bool(OPT_DEBUG))
     for (i = 0; i < daemon->max_procs; i++)

src/dnsmasq.h

@@ -723,7 +723,7 @@ struct resolvc {
 #endif
 };
 
-/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/
+/* addn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/
 #define AH_DIR      1
 #define AH_INACTIVE 2
 #define AH_WD_DONE  4
@@ -1171,7 +1171,7 @@ struct dhcp_relay {
 };
 
 extern struct daemon {
-  /* datastuctures representing the command-line and 
+  /* datastructures representing the command-line and 
      config file arguments. All set (including defaults)
      in option.c */
 

src/forward.c

@@ -1284,7 +1284,7 @@ void reply_query(int fd, time_t now)
      had replies from all to avoid filling the forwarding table when
      everything is broken */
 
-  /* decrement count of replies recieved if we sent to more than one server. */
+  /* decrement count of replies received if we sent to more than one server. */
   if (forward->forwardall && (--forward->forwardall > 1) && RCODE(header) == REFUSED)
     return;
 
@@ -2123,7 +2123,7 @@ static ssize_t tcp_talk(int first, int last, int start, struct dns_header *heade
 #if defined(SO_SNDTIMEO) && defined(SO_RCVTIMEO)
 	  /* TCP connections by default take ages to time out.
 	     Set shorter timeouts more appropriate for a DNS server.
-	     We set the recieve timeout as twice the send timeout; we
+	     We set the receive timeout as twice the send timeout; we
 	     want to fail quickly on a non-responsive server, but give it time to get an
 	     answer. */
 	  tv.tv_sec = TCP_TIMEOUT;

src/lease.c

@@ -527,7 +527,7 @@ void lease_update_slaac(time_t now)
 
 /* Find interfaces associated with leases at start-up. This gets updated as
    we do DHCP transactions, but information about directly-connected subnets
-   is useful from scrips and necessary for determining SLAAC addresses from
+   is useful from scripts and necessary for determining SLAAC addresses from
    start-time. */
 void lease_find_interfaces(time_t now)
 {

src/network.c

@@ -1457,7 +1457,7 @@ static struct serverfd *allocate_sfd(union mysockaddr *addr, char *intname, unsi
   
   /* when using random ports, servers which would otherwise use
      the INADDR_ANY/port0 socket have sfd set to NULL, this is 
-     anything without an explictly set source port. */
+     anything without an explicitly set source port. */
   if (!daemon->osport)
     {
       errno = 0;

src/option.c

@@ -1383,7 +1383,7 @@ static void dhcp_netid_list_free(struct dhcp_netid_list *netid)
       netid = netid->next;
       /* Note: don't use dhcp_netid_free() here, since that 
 	 frees a list linked on netid->next. Where a netid_list
-	 is used that's because the the ->next pointers in the
+	 is used that's because the ->next pointers in the
 	 netids are being used to temporarily construct 
 	 a list of valid tags. */
       free(tmplist->list->net);

src/radv.c

@@ -58,7 +58,7 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 			unsigned int preferred, unsigned int valid, void *vparam);
 static int iface_search(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
-			unsigned int prefered, unsigned int valid, void *vparam);
+			unsigned int preferred, unsigned int valid, void *vparam);
 static int add_lla(int index, unsigned int type, char *mac, size_t maclen, void *parm);
 static void new_timeout(struct dhcp_context *context, char *iface_name, time_t now);
 static unsigned int calc_lifetime(struct ra_interface *ra);

src/rfc3315.c

@@ -255,10 +255,10 @@ static int dhcp6_maybe_relay(struct state *state, unsigned char *inbuff, size_t
 	      /* the packet data is unaligned, copy to aligned storage */
 	      memcpy(&align, inbuff + 2, IN6ADDRSZ); 
 
-	      /* RFC6221 para 4 says if link_address in encapulation
+	      /* RFC6221 para 4 says if link_address in encapsulation
 		 is zero, ignore it, and, by implication, use the link
 		 address of any enclosing encapsulation or, failing that
-		 of the arrival interface on the the server. */
+		 of the arrival interface on the server. */
 	      if (!dhcp6_maybe_relay(state, opt6_ptr(opt, 0), opt6_len(opt), client_addr,
 				     IN6_IS_ADDR_UNSPECIFIED(&align) ? link_address : &align, now))
 		return 0;

src/tftp.c

@@ -855,7 +855,7 @@ static char *next(char **p, char *end)
   return ret;
 }
 
-/* If we don't do anything, don't write the the input/ouptut
+/* If we don't do anything, don't write the input/output
    buffer. This allows us to pass in safe read-only strings constants. */
 static void sanitise(char *buf)
 {