ctdb-common: Clean up comments in TCP packet parsing

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Thu Aug 30 07:50:04 CEST 2018 on sn-devel-144

diff --git a/ctdb/common/system_socket.c b/ctdb/common/system_socket.c
index 9336eb50713661cec16c74162aa14e461c478db8..668c04546199dec003d2fb3fc55712dc7ed373e4 100644 (file)
--- a/ctdb/common/system_socket.c
+++ b/ctdb/common/system_socket.c
@@ -752,18 +752,17 @@ static int tcp4_extract(const uint8_t *ip_pkt,
                return EMSGSIZE;
        }
 
-       /* IP */
        ip = (const struct ip *)ip_pkt;
 
-       /* We only want IPv4 packets */
+       /* IPv4 only */
        if (ip->ip_v != 4) {
                return ENOMSG;
        }
-       /* Dont look at fragments */
+       /* Don't look at fragments */
        if ((ntohs(ip->ip_off)&0x1fff) != 0) {
                return ENOMSG;
        }
-       /* we only want TCP */
+       /* TCP only */
        if (ip->ip_p != IPPROTO_TCP) {
                return ENOMSG;
        }
@@ -774,10 +773,8 @@ static int tcp4_extract(const uint8_t *ip_pkt,
                return EMSGSIZE;
        }
 
-       /* TCP */
        tcp = (const struct tcphdr *)(ip_pkt + (ip->ip_hl * sizeof(uint32_t)));
 
-       /* tell the caller which one we've found */
        src->sin_family      = AF_INET;
        src->sin_addr.s_addr = ip->ip_src.s_addr;
        src->sin_port        = tcp->th_sport;
@@ -815,7 +812,6 @@ static int tcp6_extract(const uint8_t *ip_pkt,
                return EMSGSIZE;
        }
 
-       /* IP6 */
        ip6 = (const struct ip6_hdr *)ip_pkt;
 
        /* IPv6 only */
@@ -823,15 +819,13 @@ static int tcp6_extract(const uint8_t *ip_pkt,
                return ENOMSG;
        }
 
-       /* we only want TCP */
+       /* TCP only */
        if (ip6->ip6_nxt != IPPROTO_TCP) {
                return ENOMSG;
        }
 
-       /* TCP */
        tcp = (const struct tcphdr *)(ip_pkt + sizeof(struct ip6_hdr));
 
-       /* tell the caller which one we've found */
        src->sin6_family = AF_INET6;
        src->sin6_port   = tcp->th_sport;
        src->sin6_addr   = ip6->ip6_src;