tools/testing/selftests/net/netfilter/conntrack_reverse_clash.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/net/netfilter/conntrack_reverse_clash.c

Extension

.c

Size

2643 bytes

Lines

131

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: implementation source

Status

source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• errno.h
• stdbool.h
• stdint.h
• stdio.h
• string.h
• stdlib.h
• time.h
• unistd.h
• arpa/inet.h
• sys/socket.h
• sys/wait.h

Detected Declarations

• function die
• function die_port
• function udp_socket
• function main

Annotated Snippet

if (child) {
			if (sendto(s1, buf, LEN, 0, (struct sockaddr *)&sa2, sizeof(sa2)) != LEN)
				continue;

			if (recvfrom(s2, buf, LEN, 0, (struct sockaddr *)&peer, &plen) < 0)
				die("child recvfrom");

			if (peer.sin_port != htons(PORT))
				die_port(&peer, PORT);
		} else {
			if (sendto(s2, buf, LEN, 0, (struct sockaddr *)&sa1, sizeof(sa1)) != LEN)
				continue;

			if (recvfrom(s1, buf, LEN, 0, (struct sockaddr *)&peer, &plen) < 0)
				die("parent recvfrom");

			if (peer.sin_port != htons((PORT + 1)))
				die_port(&peer, PORT + 1);
		}
	}

	if (child)
		return 0;

	wait(&status);

	if (WIFEXITED(status))
		return WEXITSTATUS(status);

	return 1;
}

Annotation

• Immediate include surface: `errno.h`, `stdbool.h`, `stdint.h`, `stdio.h`, `string.h`, `stdlib.h`, `time.h`, `unistd.h`.
• Detected declarations: `function die`, `function die_port`, `function udp_socket`, `function main`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.