kboot: Add HTTP client support - #2411
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Obtained from: https://git.musl-libc.org/cgit/musl Commit: 5122f9f3c99fee366167c5de98b31546312921ab Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Allow stand consumers to opt out of libsa-specific compiler flags while retaining the common standalone flags. A follow-up commit will use this for kboot's musl compatibility library, which needs to compile with musl's headers instead of libsa's. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Add host_unlink() to the host syscall interface. This will be used by the HTTP file sink in a follow-up commit to remove incomplete downloads. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
The kboot HTTP client added in a follow-up commit needs DNS resolution and Linux socket interfaces. Build a compatibility library from the required musl resolver and networking sources. Route allocation, errno, and syscalls through the existing kboot/libsa runtime. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
The kboot HTTPS client needs BearSSL's SSL client/engine and X.509 validation, which are not part of the BearSSL subset built into libsa for loader verification. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Build BearSSL's brssl_ta as a host tool and use it at build time to generate the trust-anchor table for kboot's HTTPS client from the system CA certificates. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Add the HTTP client and file sink used to download files over HTTP and HTTPS. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Add --http-test-get so the HTTP client can be exercised without entering the loader. This provides an entry point for the HTTP and HTTPS client tests added in a follow-up commit. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Add the build, fixtures, and local HTTP and TLS server support needed to exercise a test loader. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Cover response framing, failures, redirects, timeouts, and TLS behavior. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
Add HTTP client documentation and further work. Signed-off-by: Aryan Arora <aryanarora.w1@gmail.com>
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Depends on: #2410
Add an HTTP/1.1 client implementation to kboot.
Project: https://wiki.freebsd.org/SummerOfCode2026Projects/AddNetworkingSupportToKboot
Sponsored by: Google LLC (GSoC 2026)