feat(systemadmin)!: match ports 80 and 443 in con80, req20 and http20

The three helpers hard-coded port 80. Most web traffic is HTTPS now, so
counting port 80 alone misses most of it. With no argument they now
match 80 and 443 together; passing one or more ports narrows them to
those (`con80 8080 8443`).

http20 also moves -c before the filter expression, since BSD getopt
stops at the first non-option argument.

BREAKING CHANGE: con80, req20 and http20 now include port 443 by
default. Pass the port explicitly (`con80 80`) to get the old behavior.

Closes #14114

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

plugins/systemadmin/README.md

@@ -33,10 +33,10 @@ plugins=(... systemadmin)
 | killit      | Kills any process that matches a regular expression passed to it                                                      |
 | tree        | List contents of directories in a tree-like format (if tree isn't installed)                                          |
 | sortcons    | Sort connections by state                                                                                             |
-| con80       | View all 80 Port Connections                                                                                          |
+| con80       | View all connections on ports 80 and 443, or on the ports given as arguments (`con80 8080`)                           |
 | sortconip   | On the connected IP sorted by the number of connections                                                               |
-| req20       | List the top 20 requests on port 80                                                                                   |
-| http20      | List the top 20 connections to port 80 based on tcpdump data                                                          |
+| req20       | List the top 20 requests on ports 80 and 443, or on the ports given as arguments (`req20 8080`)                       |
+| http20      | List the top 20 connections to ports 80 and 443 based on tcpdump data, or to the ports given as arguments             |
 | timewait20  | List the top 20 time_wait connections                                                                                 |
 | syn20       | List the top 20 SYN connections                                                                                       |
 | port_pro    | Output all processes according to the port number                                                                     |

plugins/systemadmin/systemadmin.plugin.zsh

@@ -71,11 +71,13 @@ function sortcons() {
   } | sort | uniq -c | sort -rn
 }
 
-# View all 80 Port Connections
+# View all connections on the given ports (default 80 and 443)
 function con80() {
+  local -a ports=($@)
+  (( $# )) || ports=(80 443)
   {
     LANG= ss -nat || LANG= netstat -nat
-  } | grep -E ":80[^0-9]" | wc -l
+  } | grep -E ":(${(j:|:)ports})[^0-9]" | wc -l
 }
 
 # On the connected IP sorted by the number of connections
@@ -86,17 +88,21 @@ function sortconip() {
   } | cut -d: -f1 | sort | uniq -c | sort -n
 }
 
-# top20 of Find the number of requests on 80 port
+# top20 of Find the number of requests on the given ports (default 80 and 443)
 function req20() {
+  local -a ports=($@)
+  (( $# )) || ports=(80 443)
   {
-    LANG= ss -tn | awk '$4 ~ /:80$/ {print $5}' \
-    || LANG= netstat -tn | awk '$4 ~ /:80$/ {print $5}'
+    LANG= ss -tn | awk -v ports="${(j:|:)ports}" '$4 ~ ":("ports")$" {print $5}' \
+    || LANG= netstat -tn | awk -v ports="${(j:|:)ports}" '$4 ~ ":("ports")$" {print $5}'
   } | awk -F: '{print $1}' | sort | uniq -c | sort -nr | head -n 20
 }
 
-# top20 of Using tcpdump port 80 access to view
+# top20 of Using tcpdump to view access to the given ports (default 80 and 443)
 function http20() {
-  sudo tcpdump -i eth0 -tnn dst port 80 -c 1000 | awk -F"." '{print $1"."$2"."$3"."$4}' | sort | uniq -c | sort -nr | head -n 20
+  local -a ports=($@)
+  (( $# )) || ports=(80 443)
+  sudo tcpdump -i eth0 -tnn -c 1000 "dst port ${(j: or :)ports}" | awk -F"." '{print $1"."$2"."$3"."$4}' | sort | uniq -c | sort -nr | head -n 20
 }
 
 # top20 of Find time_wait connection