[PATCH v2] release/checks/integration: handle partial sends
Sometimes we see a test failure that looks like this: unexpected connection data: qemu-system-aarch64: terminating on signal 15 from pid 184 () I think this is because, now that the nc command in the networking integration test has a timeout, it's possible for it to time out after having opened the connection, but before having written all its input to it. Therefore, ignore connections that send a prefix of the expected data (including nothing), and just wait for the next connection rather than failing if that happens. Closes: https://spectrum-os.org/lists/archives/spectrum-devel/875xbl33vw.fsf@alyssa.... Fixes: c61b297 ("release/checks/integration: add nc timeout") Signed-off-by: Alyssa Ross <hi@alyssa.is> --- v2: close connections when finished reading. v1: https://spectrum-os.org/lists/archives/spectrum-devel/20251129163521.717709-... release/checks/integration/networking.c | 50 +++++++++++++++---------- 1 file changed, 31 insertions(+), 19 deletions(-) diff --git a/release/checks/integration/networking.c b/release/checks/integration/networking.c index 97d7895..df76ec5 100644 --- a/release/checks/integration/networking.c +++ b/release/checks/integration/networking.c @@ -57,32 +57,44 @@ static int setup_server(void) static void expect_connection(int listener) { - int conn_fd; - FILE *conn; + int conn, r; char msg[7]; size_t len; - fputs("waiting for server connection\n", stderr); - if ((conn_fd = accept(listener, nullptr, nullptr)) == -1) { - perror("accept"); - exit(EXIT_FAILURE); - } - fputs("accepted connection!\n", stderr); - if (!(conn = fdopen(conn_fd, "r"))) { - perror("fdopen(server connection)"); - exit(EXIT_FAILURE); - } + for (;;) { + len = 0; - len = fread(msg, 1, sizeof msg, conn); - if (len != 6 || memcmp("hello\n", msg, 6)) { - if (ferror(conn)) - perror("fread(server connection)"); - else + fputs("waiting for server connection\n", stderr); + if ((conn = accept(listener, nullptr, nullptr)) == -1) { + perror("accept"); + exit(EXIT_FAILURE); + } + fputs("accepted connection!\n", stderr); + + for (;;) { + r = read(conn, msg + len, sizeof msg - len); + if (r == -1) { + perror("read"); + exit(EXIT_FAILURE); + } + if (r == 0) + break; + len += r; + } + close(conn); + + if (memcmp("hello\n", msg, len) || len > 6) { fprintf(stderr, "unexpected connection data: %.*s", (int)len, msg); - exit(EXIT_FAILURE); + exit(EXIT_FAILURE); + } + + // If connection was disconnect partway through, try again. + if (len < 6) + continue; + + return; } - fclose(conn); } static void drain_connections(int listener) base-commit: 067c6a5d50971242f9cb8ac0ac76e20d88a9b5c1 -- 2.51.0
On 11/29/25 19:00, Alyssa Ross wrote:
Sometimes we see a test failure that looks like this:
unexpected connection data: qemu-system-aarch64: terminating on signal 15 from pid 184 ()
I think this is because, now that the nc command in the networking integration test has a timeout, it's possible for it to time out after having opened the connection, but before having written all its input to it. Therefore, ignore connections that send a prefix of the expected data (including nothing), and just wait for the next connection rather than failing if that happens.
Closes: https://spectrum-os.org/lists/archives/spectrum-devel/875xbl33vw.fsf@alyssa.... Fixes: c61b297 ("release/checks/integration: add nc timeout") Signed-off-by: Alyssa Ross <hi@alyssa.is> --- v2: close connections when finished reading. v1: https://spectrum-os.org/lists/archives/spectrum-devel/20251129163521.717709-...
release/checks/integration/networking.c | 50 +++++++++++++++---------- 1 file changed, 31 insertions(+), 19 deletions(-)
diff --git a/release/checks/integration/networking.c b/release/checks/integration/networking.c index 97d7895..df76ec5 100644 --- a/release/checks/integration/networking.c +++ b/release/checks/integration/networking.c @@ -57,32 +57,44 @@ static int setup_server(void)
static void expect_connection(int listener) { - int conn_fd; - FILE *conn; + int conn, r; char msg[7]; size_t len;
- fputs("waiting for server connection\n", stderr); - if ((conn_fd = accept(listener, nullptr, nullptr)) == -1) { - perror("accept"); - exit(EXIT_FAILURE); - } - fputs("accepted connection!\n", stderr); - if (!(conn = fdopen(conn_fd, "r"))) { - perror("fdopen(server connection)"); - exit(EXIT_FAILURE); - } + for (;;) { + len = 0;
- len = fread(msg, 1, sizeof msg, conn); - if (len != 6 || memcmp("hello\n", msg, 6)) { - if (ferror(conn)) - perror("fread(server connection)"); - else + fputs("waiting for server connection\n", stderr); + if ((conn = accept(listener, nullptr, nullptr)) == -1) { + perror("accept"); + exit(EXIT_FAILURE); + } + fputs("accepted connection!\n", stderr); + + for (;;) { + r = read(conn, msg + len, sizeof msg - len); + if (r == -1) { + perror("read"); + exit(EXIT_FAILURE); + } + if (r == 0) + break; + len += r; + } + close(conn); + + if (memcmp("hello\n", msg, len) || len > 6) { fprintf(stderr, "unexpected connection data: %.*s", (int)len, msg); - exit(EXIT_FAILURE); + exit(EXIT_FAILURE); + } + + // If connection was disconnect partway through, try again. + if (len < 6) + continue; + + return; } - fclose(conn); }
static void drain_connections(int listener)
base-commit: 067c6a5d50971242f9cb8ac0ac76e20d88a9b5c1 Reviewed-by: Yureka Lilian <yureka@cyberchaos.dev>
This patch has been committed as d0dba15c869b52ae49dfb94a7195c3e7b2c972df, which can be viewed online at https://spectrum-os.org/git/spectrum/commit/?id=d0dba15c869b52ae49dfb94a7195.... This is an automated message. Send comments/questions/requests to: Alyssa Ross <hi@alyssa.is>
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