Fixed tabs into spaces. Fixed other stylos.

src/core/ipv4/ip_addr.c

@@ -33,9 +33,6 @@
 #include "lwip/ip_addr.h"
 #include "lwip/inet.h"
 
+/* used by IP_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */
 const struct ip_addr ip_addr_any = { 0x00000000UL };
 const struct ip_addr ip_addr_broadcast = { 0xffffffffUL };
-
-/*-----------------------------------------------------------------------------------*/
-
-/*-----------------------------------------------------------------------------------*/

src/core/pbuf.c

@@ -529,10 +529,11 @@ pbuf_free(struct pbuf *p)
    */
   SYS_ARCH_PROTECT(old_level);
   /* de-allocate all consecutive pbufs from the head of the chain that
-   * obtain a zero reference count */
+   * obtain a zero reference count after decrementing*/
   while (p != NULL) {
     /* all pbufs in a chain are referenced at least once */
     LWIP_ASSERT("pbuf_free: p->ref > 0", p->ref > 0);
+    /* decrease reference count (number of pointers to pbuf) */
     p->ref--;
     /* this pbuf is no longer referenced to? */
     if (p->ref == 0) {
@@ -543,10 +544,10 @@ pbuf_free(struct pbuf *p)
         p->len = p->tot_len = PBUF_POOL_BUFSIZE;
         p->payload = (void *)((u8_t *)p + sizeof(struct pbuf));
         PBUF_POOL_FREE(p);
-      /* a RAM/ROM referencing pbuf */
+      /* a ROM or RAM referencing pbuf */
       } else if (p->flags == PBUF_FLAG_ROM || p->flags == PBUF_FLAG_REF) {
         memp_freep(MEMP_PBUF, p);
-      /* pbuf with data */
+      /* p->flags == PBUF_FLAG_RAM */
       } else {
         mem_free(p);
       }
@@ -554,7 +555,7 @@ pbuf_free(struct pbuf *p)
       /* proceed to next pbuf */
       p = q;
     /* p->ref > 0, this pbuf is still referenced to */
-    /* (so the remaining pbufs in chain as well)    */
+    /* (and so the remaining pbufs in chain as well) */
     } else {
       /* stop walking through chain */
       p = NULL;

src/core/tcp.c

@@ -500,13 +500,11 @@ tcp_slowtmr(void)
           pcb->rtime, pcb->rto));
 
         /* Double retransmission time-out unless we are trying to
-           connect to somebody (i.e., we are in SYN_SENT). */
+         * connect to somebody (i.e., we are in SYN_SENT). */
         if (pcb->state != SYN_SENT) {
           pcb->rto = ((pcb->sa >> 3) + pcb->sv) << tcp_backoff[pcb->nrtx];
         }
-
         tcp_rexmit(pcb);
-	
         /* Reduce congestion window and ssthresh. */
         eff_wnd = MIN(pcb->cwnd, pcb->snd_wnd);
         pcb->ssthresh = eff_wnd >> 1;
@@ -514,12 +512,10 @@ tcp_slowtmr(void)
           pcb->ssthresh = pcb->mss * 2;
         }
         pcb->cwnd = pcb->mss;
-
         DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: cwnd %u ssthresh %u\n",
                                 pcb->cwnd, pcb->ssthresh));
       }
     }
-	  
     /* Check if this PCB has stayed too long in FIN-WAIT-2 */
     if (pcb->state == FIN_WAIT_2) {
       if((u32_t)(tcp_ticks - pcb->tmr) >

src/core/udp.c

@@ -337,12 +337,12 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
 
   DEBUGF(UDP_DEBUG | DBG_TRACE | 3, ("udp_send\n"));
 
-  /* if the PCB is not yet bound, bind it here */
+  /* if the PCB is not yet bound to a port, bind it here */
   if (pcb->local_port == 0) {
-    DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: not yet bound\n"));
+    DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: not yet bound to a port, binding now\n"));
     err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
     if (err != ERR_OK) {
-      DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: forced bind failed\n"));
+      DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: forced port bind failed\n"));
       return err;
     }
   }
@@ -360,6 +360,7 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
     pbuf_chain(q, p);
     /* { first pbuf q points to header pbuf } */
     DEBUGF(UDP_DEBUG, ("udp_send: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
+  /* adding a header within p succeeded */
   }	else {
     /* first pbuf q equals given pbuf */
     q = p;
@@ -380,7 +381,7 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
   }
   /* using IP_ANY_ADDR? */
   if (ip_addr_isany(&pcb->local_ip)) {
-    /* use network interface IP address as source address */
+    /* use outgoing network interface IP address as source address */
     src_ip = &(netif->ip_addr);
   } else {
     /* use UDP PCB local IP address as source address */

src/include/lwip/tcp.h

@@ -209,7 +209,6 @@ struct tcp_pcb {
   u32_t rcv_nxt;   /* next seqno expected */
   u16_t rcv_wnd;   /* receiver window */
   
-  
   /* Timers */
   u32_t tmr;
   u8_t polltmr, pollinterval;