Fix advanced ping endpoint and clarify packet crafting behavior

[Copilot]

The Traffic page ping functionality was failing because the frontend sends multi-protocol requests (ICMP/TCP/UDP/HTTP/DNS) but the backend only accepted a simple hostname parameter. Additionally, users reported SYN packets to 8.8.8.8 not receiving responses, which is expected behavior for filtered ports.

Changes

Backend API (traffic.py)

• Expanded PingRequest model to accept protocol-specific parameters: target, protocol, port, count, timeout, packet_size, use_https
• Implemented protocol handlers:
  • ICMP: Standard ping with RTT statistics and packet loss calculation
  • TCP: hping3 SYN probes with response parsing
  • UDP: hping3 UDP probes with ICMP unreachable detection
  • HTTP/HTTPS: Request-based connectivity with status code tracking
  • DNS: dig queries to root domain for maximum compatibility
• Added input validators (port 1-65535, count 1-100, timeout 1-30s, etc.)

Packet Crafting (SnifferService.py)

• Added explanatory notes when packets receive no response
• Extracted informational text to class constants for maintainability

Example

# Before: Only basic ping
PingRequest(host="8.8.8.8")

# After: Multi-protocol with full control
PingRequest(
    target="8.8.8.8",
    protocol="tcp",      # or icmp, udp, http, dns
    port=53,
    count=4,
    timeout=5
)

Response now includes detailed statistics:

{
  "protocol": "tcp",
  "target": "8.8.8.8",
  "port": 53,
  "successful": 4,
  "packet_loss": 0,
  "min_ms": 12.3,
  "avg_ms": 15.7,
  "max_ms": 18.2,
  "results": [...]
}

Notes

SYN packets to public DNS servers (8.8.8.8) not responding to non-DNS ports is correct firewall behavior. The UI now displays explanatory notes to avoid confusion.

Original prompt

Ping is throwing error in gui in traffic page also packet craft seems to be sending but i tried creating oacket syn to 8.8.8.8 didnt get any response

Custom agent used: _DevTeam
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