Documentation update and new logo

README.md

@@ -3,13 +3,13 @@
 [![GitHub license](https://img.shields.io/github/license/dkorunic/pktstat-bpf)](https://github.com/dkorunic/pktstat-bpf/blob/master/LICENSE)
 [![GitHub release](https://img.shields.io/github/release/dkorunic/pktstat-bpf)](https://github.com/dkorunic/pktstat-bpf/releases/latest)
 
-![](gopher.png)
+![](gopher.jpg)
 
 ## About
 
-pktstat-bpf is a simple replacement for ncurses-based [pktstat](https://github.com/dleonard0/pktstat), using Linux eBPF ([extended Berkeley Packet Filter](https://prototype-kernel.readthedocs.io/en/latest/bpf/)) program, allowing packet statistics gathering even under **very high traffic volume** conditions, typically several million packets per second even on an average server. In this scenario (high volume, DoS attacks etc.) typically both regular PCAP or AF_PACKET solutions start being unreliable due to increasing packet loss.
+pktstat-bpf is a simple replacement for ncurses/libpcap-based [pktstat](https://github.com/dleonard0/pktstat), using Linux eBPF ([extended Berkeley Packet Filter](https://prototype-kernel.readthedocs.io/en/latest/bpf/)) program, allowing packet statistics gathering even under **very high traffic volume** conditions, typically several million packets per second even on an average server. In this scenario (high volume, DoS attacks etc.) typically regular packet capture solutions start being unreliable due to increasing packet loss.
 
-By default it uses **TC** (Traffic Control) eBPF hooks with TCX attaching and that requires at minimum Linux kernel **v6.6** for both ingress and egress traffic statistics. Alternatively it can switch to [XDP](https://github.com/xdp-project/xdp-tutorial) (eXpress Data Path) hook but with a consequence of **losing egress statistics** since **XDP** works only in ingress path. XDP mode supports older kernels, starting with Linux kernel v4.8, but XDP program to network interface attaching call requires Linux kernel **v5.9**. As always, some distributions might have backported patches (notable example is Red Hat Enterprise Linux kernel) and XDP/TC eBPF program might work on older kernels too.
+By default it uses **TC** (Traffic Control) eBPF hooks with TCX attaching requiring at minimum Linux kernel **v6.6** for both ingress and egress traffic statistics. Alternatively it can switch to [XDP](https://github.com/xdp-project/xdp-tutorial) (eXpress Data Path) hook but with a consequence of **losing egress statistics** since **XDP** works only in ingress path. XDP mode due to XDP program to network interface attaching calls requires at minimum Linux kernel **v5.9**. Some distributions might have backported XDP/TC patches (notable example is Red Hat Enterprise Linux kernel) and eBPF program might work on older kernels too.
 
 At the end of the execution program will display per-IP and per-protocol statistics sorted by per-connection bps, packets and (source-IP:port, destination-IP:port) tuples.
 
@@ -19,7 +19,7 @@ Program consists of the [eBPF code in C](counter.c) and the pure-Go userland Gol
 
 ## Requirements
 
-Loading eBPF program typically requires root privileges, but it is also possible to run rootless and set specific CAP_BPF and CAP_NET_ADMIN [capabilities](https://man7.org/linux/man-pages/man7/capabilities.7.html):
+Loading eBPF program typically requires root privileges, but it is also possible to run rootless and set specific `CAP_BPF` and `CAP_NET_ADMIN` [capabilities](https://man7.org/linux/man-pages/man7/capabilities.7.html):
 
 ```shell
 $ setcap CAP_BPF,CAP_NET_ADMIN=eip pktstat-bpf
@@ -35,14 +35,14 @@ In case of XDP, not all NIC drivers support **Native XDP** (XDP program is loade
 
 The following table maps features, requirements and expected performance for described modes:
 
-| Capture type                                     | Ingress | Egress | Performance    | Kernel required | SmartNIC required |
-| ------------------------------------------------ | ------- | ------ | -------------- | --------------- | ----------------- |
-| [PCAP](https://github.com/dkorunic/pktstat)      | Yes     | Yes    | Low            | Any             | No                |
-| [AF_PACKET](https://github.com/dkorunic/pktstat) | Yes     | Yes    | Medium         | Any             | No                |
-| TC                                               | Yes     | Yes    | **High**       | v6.6            | No                |
-| XDP Generic                                      | Yes     | **No** | **High**       | v5.9            | No                |
-| XDP Native                                       | Yes     | **No** | **Very high**  | v5.9            | No                |
-| XDP Offloaded                                    | Yes     | **No** | **Wire speed** | v5.9            | **Yes**           |
+| Capture type                                        | Ingress | Egress | Performance    | Kernel required | SmartNIC required |
+| --------------------------------------------------- | ------- | ------ | -------------- | --------------- | ----------------- |
+| Generic [PCAP](https://github.com/dkorunic/pktstat) | Yes     | Yes    | Low            | Any             | No                |
+| [AF_PACKET](https://github.com/dkorunic/pktstat)    | Yes     | Yes    | Medium         | Any             | No                |
+| TC                                                  | Yes     | Yes    | **High**       | v6.6            | No                |
+| XDP Generic                                         | Yes     | **No** | **High**       | v5.9            | No                |
+| XDP Native                                          | Yes     | **No** | **Very high**  | v5.9            | No                |
+| XDP Offloaded                                       | Yes     | **No** | **Wire speed** | v5.9            | **Yes**           |
 
 A list of XDP compatible drivers follows (and it is not necessarily up-to-date):