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/* lib9p/tests/testclient-sess.c - Test the 9P `test_server`'s sessions
*
* Copyright (C) 2025 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <arpa/inet.h> /* for htons(), inet_addr() */
#include <errno.h>
#include <error.h>
#include <netinet/in.h> /* for struct sockaddr{,_in} */
#include <stdlib.h> /* for atoi() */
#include <sys/socket.h> /* for socket(), connect() */
#include <sys/uio.h> /* for writev() */
#include <unistd.h> /* for read() */
#include <libmisc/assert.h>
#include <libmisc/endian.h>
#include <lib9p/core.h>
#define MAX_MSG_SIZE (8*1024)
static void _send9p(int fd, struct lib9p_ctx *ctx, enum lib9p_msg_type typ, void *body) {
struct lib9p_Tmsg_send_buf buf;
bool err = lib9p_Tmsg_marshal(ctx, typ, body, &buf);
assert(!err);
size_t exp = 0;
for (size_t i = 0; i < buf.iov_cnt; i++)
exp += buf.iov[i].iov_len;
ssize_t act = writev(fd, buf.iov, buf.iov_cnt);
if (act < 0)
error(1, errno, "writev");
assert((size_t)act == exp);
}
#define send9p(typ, ...) _send9p(fd, &ctx, LIB9P_TYP_##typ, &((struct lib9p_msg_##typ){ __VA_ARGS__ }))
static void _recv9p(int fd) {
uint8_t buf[MAX_MSG_SIZE];
size_t goal = 4;
size_t done = 0;
while (done < goal) {
ssize_t n = read(fd, &buf[done], goal-done);
if (n < 0)
error(1, errno, "read");
done += n;
}
goal = uint32le_decode(buf);
assert(goal <= MAX_MSG_SIZE);
while (done < goal) {
ssize_t n = read(fd, &buf[done], goal-done);
if (n < 0)
error(1, errno, "read");
done += n;
}
}
#define recv9p() _recv9p(fd)
int main(int argc, char *argv[]) {
if (argc != 2)
error(2, 0, "Usage: %s SERVER_PORT", argv[0]);
uint16_t server_port = atoi(argv[1]);
union {
struct sockaddr gen;
struct sockaddr_in in;
} server_addr = {};
server_addr.in.sin_family = AF_INET;
server_addr.in.sin_addr.s_addr = inet_addr("127.0.0.1");
server_addr.in.sin_port = htons(server_port);
int fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd < 0)
error(1, errno, "socket");
if (connect(fd, &server_addr.gen, sizeof(server_addr)) < 0)
error(1, errno, "connect");
struct lib9p_ctx ctx = {
.max_msg_size = 16*1024,
};
struct lib9p_s wname[1];
/* numeric downgrade, unknown ext *************************************/
send9p(Tversion, .tag=0, .max_msg_size=57, .version=lib9p_str("9P2025.x"));
recv9p(); /* Rversion */
ctx.version = LIB9P_VER_9P2000;
/* numeric downgrade, known ext ***************************************/
send9p(Tversion, .tag=0, .max_msg_size=57, .version=lib9p_str("9P2025.u"));
recv9p(); /* Rversion */
ctx.version = LIB9P_VER_9P2000_u;
/* ext version, users *************************************************/
send9p(Tversion, .tag=0, .max_msg_size=(8*1024), .version=lib9p_str("9P2000.u"));
recv9p(); /* Rversion */
ctx.version = LIB9P_VER_9P2000_u;
send9p(Tattach, .tag=0, .fid=0, .afid=LIB9P_FID_NOFID, .uname=lib9p_str("alice"), .n_uid=1000, .aname=lib9p_str(""));
recv9p(); /* Rattach */
send9p(Tattach, .tag=0, .fid=1, .afid=LIB9P_FID_NOFID, .uname=lib9p_str("bob"), .n_uid=1001, .aname=lib9p_str(""));
recv9p(); /* Rattach */
wname[0] = lib9p_str("whoami"); send9p(Twalk, .tag=0, .fid=0, .newfid=2, .nwname=1, .wname=wname);
recv9p(); /* Rwalk */
wname[0] = lib9p_str("whoami"); send9p(Twalk, .tag=0, .fid=1, .newfid=3, .nwname=1, .wname=wname);
recv9p(); /* Rwalk */
send9p(Topen, .tag=0, .fid=2, .mode=LIB9P_O_MODE_READ);
recv9p(); /* Ropen */
send9p(Topen, .tag=0, .fid=3, .mode=LIB9P_O_MODE_READ);
recv9p(); /* Ropen */
send9p(Tread, .tag=0, .fid=2, .offset=0, .count=100);
recv9p(); /* Rread */
send9p(Tread, .tag=0, .fid=3, .offset=0, .count=100);
recv9p(); /* Rread */
/* walk ***************************************************************/
send9p(Tversion, .tag=0, .max_msg_size=(8*1024), .version=lib9p_str("9P2000"));
recv9p(); /* Rversion */
ctx.version = LIB9P_VER_9P2000;
send9p(Tattach, .tag=0, .fid=0, .afid=LIB9P_FID_NOFID, .uname=lib9p_str("nobody"), .aname=lib9p_str(""));
recv9p(); /* Rattach */
/* dup */
send9p(Twalk, .tag=0, .fid=0, .newfid=1, .nwname=0);
recv9p(); /* Rwalk */
/* "The walk request carries as arguments an existing fid"... */
send9p(Twalk, .tag=0, .fid=2, .newfid=3, .nwname=0);
recv9p(); /* Rerror */
/* ..."and a proposed newfid"... */
send9p(Twalk, .tag=0, .fid=1, .newfid=0xffffffff, .nwname=0);
recv9p(); /* Rerror */
/* ..."(which must not be in use"... */
send9p(Twalk, .tag=0, .fid=1, .newfid=0, .nwname=0);
recv9p(); /* Rerror */
/* ..."unless it is the same as fid)"... */
send9p(Twalk, .tag=0, .fid=1, .newfid=1, .nwname=0);
recv9p(); /* Rwalk */
/* ... "that the client wishes to associate with the result of
* traversing the directory hierarchy by `walking' the heierarchy using
* the successive path name elements wname."... */
/* ..."The fid must represent a directory"... */
wname[0] = lib9p_str("README.md"); send9p(Twalk, .tag=0, .fid=1, .newfid=2, .nwname=1, .wname=wname);
recv9p(); /* Rwalk */
wname[0] = lib9p_str(".."); send9p(Twalk, .tag=0, .fid=2, .newfid=3, .nwname=1, .wname=wname);
recv9p(); /* Rerror */
/* ..."unless zero path name elements are specified." */
send9p(Twalk, .tag=0, .fid=2, .newfid=3, .nwname=0);
recv9p(); /* Rwalk */
/* "The fid must be valid in the current session" (tested above)... */
/* ..."and must not have been opened for I/O by an open or create
* message."... */
send9p(Topen, .tag=0, .fid=3, .mode=LIB9P_O_MODE_READ);
recv9p(); /* Ropen */
send9p(Twalk, .tag=0, .fid=3, .newfid=4, .nwname=0);
recv9p(); /* Rerror */
/* flush **************************************************************/
send9p(Tversion, .tag=0, .max_msg_size=(8*1024), .version=lib9p_str("9P2000"));
recv9p(); /* Rversion */
ctx.version = LIB9P_VER_9P2000;
send9p(Tattach, .tag=0, .fid=0, .afid=LIB9P_FID_NOFID, .uname=lib9p_str("nobody"), .aname=lib9p_str(""));
recv9p(); /* Rattach */
/* flush, but original response comes back first */
wname[0] = lib9p_str("slowread"); send9p(Twalk, .tag=0, .fid=0, .newfid=1, .nwname=1, .wname=wname);
recv9p(); /* Rwalk */
send9p(Topen, .tag=0, .fid=1, .mode=LIB9P_O_MODE_READ);
recv9p(); /* Ropen */
send9p(Tread, .tag=1, .fid=1, .offset=0, .count=6);
send9p(Tflush, .tag=2, .oldtag=1);
recv9p(); /* Rread */
recv9p(); /* Rflush */
/* flush, original request is aborted with error */
wname[0] = lib9p_str("slowread-flushable"); send9p(Twalk, .tag=1, .fid=0, .newfid=2, .nwname=1, .wname=wname);
recv9p(); /* Rwalk */
send9p(Topen, .tag=0, .fid=2, .mode=LIB9P_O_MODE_READ);
recv9p(); /* Ropen */
send9p(Tread, .tag=1, .fid=2, .offset=0, .count=6);
send9p(Tflush, .tag=2, .oldtag=1);
recv9p(); /* Rerror */
recv9p(); /* Rflush */
/* flush, unknown tag */
send9p(Tflush, .tag=0, .oldtag=99);
recv9p(); /* Rflush */
/* shutdown ***********************************************************/
send9p(Tversion, .tag=0, .max_msg_size=(8*1024), .version=lib9p_str("9P2000"));
recv9p(); /* Rversion */
ctx.version = LIB9P_VER_9P2000;
send9p(Tattach, .tag=0, .fid=0, .afid=LIB9P_FID_NOFID, .uname=lib9p_str("nobody"), .aname=lib9p_str(""));
recv9p(); /* Rattach */
/* check the newfid==fid case */
wname[0] = lib9p_str("shutdown"); send9p(Twalk, .tag=0, .fid=0, .newfid=0, .nwname=1, .wname=wname);
recv9p(); /* Rwalk */
send9p(Topen, .tag=0, .fid=0, .mode=LIB9P_O_MODE_WRITE);
recv9p(); /* Ropen */
send9p(Twrite, .tag=0, .fid=0, .offset=0, .count=2, .data="1\n");
recv9p(); /* Rwrite */
return 0;
}
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