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/*++
/* NAME
/* qmqp-source 1
/* SUMMARY
/* parallelized QMQP test generator
/* SYNOPSIS
/* .fi
/* \fBqmqp-source\fR [\fIoptions\fR] [\fBinet:\fR]\fIhost\fR[:\fIport\fR]
/*
/* \fBqmqp-source\fR [\fIoptions\fR] \fBunix:\fIpathname\fR
/* DESCRIPTION
/* \fBqmqp-source\fR connects to the named host and TCP port (default 628)
/* and sends one or more messages to it, either sequentially
/* or in parallel. The program speaks the QMQP protocol.
/* Connections can be made to UNIX-domain and IPv4 or IPv6 servers.
/* IPv4 and IPv6 are the default.
/*
/* Note: this is an unsupported test program. No attempt is made
/* to maintain compatibility between successive versions.
/*
/* Arguments:
/* .IP \fB-4\fR
/* Connect to the server with IPv4. This option has no effect when
/* Postfix is built without IPv6 support.
/* .IP \fB-6\fR
/* Connect to the server with IPv6. This option is not available when
/* Postfix is built without IPv6 support.
/* .IP \fB-c\fR
/* Display a running counter that is incremented each time
/* a delivery completes.
/* .IP "\fB-C \fIcount\fR"
/* When a host sends RESET instead of SYN|ACK, try \fIcount\fR times
/* before giving up. The default count is 1. Specify a larger count in
/* order to work around a problem with TCP/IP stacks that send RESET
/* when the listen queue is full.
/* .IP "\fB-f \fIfrom\fR"
/* Use the specified sender address (default: <foo@myhostname>).
/* .IP "\fB-l \fIlength\fR"
/* Send \fIlength\fR bytes as message payload. The length
/* includes the message headers.
/* .IP "\fB-m \fImessage_count\fR"
/* Send the specified number of messages (default: 1).
/* .IP "\fB-M \fImyhostname\fR"
/* Use the specified hostname or [address] in the default
/* sender and recipient addresses, instead of the machine
/* hostname.
/* .IP "\fB-r \fIrecipient_count\fR"
/* Send the specified number of recipients per transaction (default: 1).
/* Recipient names are generated by prepending a number to the
/* recipient address.
/* .IP "\fB-s \fIsession_count\fR"
/* Run the specified number of QMQP sessions in parallel (default: 1).
/* .IP "\fB-t \fIto\fR"
/* Use the specified recipient address (default: <foo@myhostname>).
/* .IP "\fB-R \fIinterval\fR"
/* Wait for a random period of time 0 <= n <= interval between messages.
/* Suspending one thread does not affect other delivery threads.
/* .IP \fB-v\fR
/* Make the program more verbose, for debugging purposes.
/* .IP "\fB-w \fIinterval\fR"
/* Wait a fixed time between messages.
/* Suspending one thread does not affect other delivery threads.
/* SEE ALSO
/* qmqp-sink(1), QMQP message dump
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <sys/un.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <msg_vstream.h>
#include <vstring.h>
#include <vstream.h>
#include <get_hostname.h>
#include <split_at.h>
#include <connect.h>
#include <mymalloc.h>
#include <events.h>
#include <iostuff.h>
#include <netstring.h>
#include <sane_connect.h>
#include <host_port.h>
#include <myaddrinfo.h>
#include <inet_proto.h>
#include <valid_hostname.h>
#include <valid_mailhost_addr.h>
/* Global library. */
#include <mail_date.h>
#include <qmqp_proto.h>
#include <mail_version.h>
/* Application-specific. */
/*
* Per-session data structure with state.
*
* This software can maintain multiple parallel connections to the same QMQP
* server. However, it makes no more than one connection request at a time
* to avoid overwhelming the server with SYN packets and having to back off.
* Back-off would screw up the benchmark. Pending connection requests are
* kept in a linear list.
*/
typedef struct SESSION {
int xfer_count; /* # of xfers in session */
int rcpt_done; /* # of recipients done */
int rcpt_count; /* # of recipients to go */
VSTREAM *stream; /* open connection */
int connect_count; /* # of connect()s to retry */
struct SESSION *next; /* connect() queue linkage */
} SESSION;
static SESSION *last_session; /* connect() queue tail */
static VSTRING *buffer;
static int var_line_limit = 10240;
static int var_timeout = 300;
static const char *var_myhostname;
static int session_count;
static int message_count = 1;
static struct sockaddr_storage ss;
#undef sun
static struct sockaddr_un sun;
static struct sockaddr *sa;
static int sa_length;
static int recipients = 1;
static char *defaddr;
static char *recipient;
static char *sender;
static int message_length = 1024;
static int count = 0;
static int counter = 0;
static int connect_count = 1;
static int random_delay = 0;
static int fixed_delay = 0;
static const char *mydate;
static int mypid;
static void enqueue_connect(SESSION *);
static void start_connect(SESSION *);
static void connect_done(int, void *);
static void send_data(SESSION *);
static void receive_reply(int, void *);
static VSTRING *message_buffer;
static VSTRING *sender_buffer;
static VSTRING *recipient_buffer;
/* Silly little macros. */
#define STR(x) vstring_str(x)
#define LEN(x) VSTRING_LEN(x)
/* random_interval - generate a random value in 0 .. (small) interval */
static int random_interval(int interval)
{
return (rand() % (interval + 1));
}
/* socket_error - look up and reset the last socket error */
static int socket_error(int sock)
{
int error;
SOCKOPT_SIZE error_len;
/*
* Some Solaris 2 versions have getsockopt() itself return the error,
* instead of returning it via the parameter list.
*/
error = 0;
error_len = sizeof(error);
if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *) &error, &error_len) < 0)
return (-1);
if (error) {
errno = error;
return (-1);
}
/*
* No problems.
*/
return (0);
}
/* exception_text - translate exceptions from the netstring module */
static char *exception_text(int except)
{
;
switch (except) {
case NETSTRING_ERR_EOF:
return ("lost connection");
case NETSTRING_ERR_TIME:
return ("timeout");
case NETSTRING_ERR_FORMAT:
return ("netstring format error");
case NETSTRING_ERR_SIZE:
return ("netstring size exceeds limit");
default:
msg_panic("exception_text: unknown exception %d", except);
}
/* NOTREACHED */
}
/* startup - connect to server but do not wait */
static void startup(SESSION *session)
{
if (message_count-- <= 0) {
myfree((void *) session);
session_count--;
return;
}
enqueue_connect(session);
}
/* start_event - invoke startup from timer context */
static void start_event(int unused_event, void *context)
{
SESSION *session = (SESSION *) context;
startup(session);
}
/* start_another - start another session */
static void start_another(SESSION *session)
{
if (random_delay > 0) {
event_request_timer(start_event, (void *) session,
random_interval(random_delay));
} else if (fixed_delay > 0) {
event_request_timer(start_event, (void *) session, fixed_delay);
} else {
startup(session);
}
}
/* enqueue_connect - queue a connection request */
static void enqueue_connect(SESSION *session)
{
session->next = 0;
if (last_session == 0) {
last_session = session;
start_connect(session);
} else {
last_session->next = session;
last_session = session;
}
}
/* dequeue_connect - connection request completed */
static void dequeue_connect(SESSION *session)
{
if (session == last_session) {
if (session->next != 0)
msg_panic("dequeue_connect: queue ends after last");
last_session = 0;
} else {
if (session->next == 0)
msg_panic("dequeue_connect: queue ends before last");
start_connect(session->next);
}
}
/* fail_connect - handle failed startup */
static void fail_connect(SESSION *session)
{
if (session->connect_count-- == 1)
msg_fatal("connect: %m");
msg_warn("connect: %m");
event_disable_readwrite(vstream_fileno(session->stream));
vstream_fclose(session->stream);
session->stream = 0;
#ifdef MISSING_USLEEP
doze(10);
#else
usleep(10);
#endif
start_connect(session);
}
/* start_connect - start TCP handshake */
static void start_connect(SESSION *session)
{
int fd;
struct linger linger;
/*
* Some systems don't set the socket error when connect() fails early
* (loopback) so we must deal with the error immediately, rather than
* retrieving it later with getsockopt(). We can't use MSG_PEEK to
* distinguish between server disconnect and connection refused.
*/
if ((fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0)
msg_fatal("socket: %m");
(void) non_blocking(fd, NON_BLOCKING);
linger.l_onoff = 1;
linger.l_linger = 0;
if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (void *) &linger,
sizeof(linger)) < 0)
msg_warn("setsockopt SO_LINGER %d: %m", linger.l_linger);
session->stream = vstream_fdopen(fd, O_RDWR);
event_enable_write(fd, connect_done, (void *) session);
netstring_setup(session->stream, var_timeout);
if (sane_connect(fd, sa, sa_length) < 0 && errno != EINPROGRESS)
fail_connect(session);
}
/* connect_done - send message sender info */
static void connect_done(int unused_event, void *context)
{
SESSION *session = (SESSION *) context;
int fd = vstream_fileno(session->stream);
/*
* Try again after some delay when the connection failed, in case they
* run a Mickey Mouse protocol stack.
*/
if (socket_error(fd) < 0) {
fail_connect(session);
} else {
dequeue_connect(session);
non_blocking(fd, BLOCKING);
event_disable_readwrite(fd);
/* Avoid poor performance when TCP MSS > VSTREAM_BUFSIZE. */
if (sa->sa_family == AF_INET
#ifdef AF_INET6
|| sa->sa_family == AF_INET6
#endif
)
vstream_tweak_tcp(session->stream);
send_data(session);
}
}
/* send_data - send message+sender+recipients */
static void send_data(SESSION *session)
{
int fd = vstream_fileno(session->stream);
int except;
/*
* Prepare for disaster.
*/
if ((except = vstream_setjmp(session->stream)) != 0)
msg_fatal("%s while sending message", exception_text(except));
/*
* Send the message content, by wrapping three netstrings into an
* over-all netstring.
*
* XXX This should be done more carefully to avoid blocking when sending
* large messages over slow networks.
*/
netstring_put_multi(session->stream,
STR(message_buffer), LEN(message_buffer),
STR(sender_buffer), LEN(sender_buffer),
STR(recipient_buffer), LEN(recipient_buffer),
(char *) 0);
netstring_fflush(session->stream);
/*
* Wake me up when the server replies or when something bad happens.
*/
event_enable_read(fd, receive_reply, (void *) session);
}
/* receive_reply - read server reply */
static void receive_reply(int unused_event, void *context)
{
SESSION *session = (SESSION *) context;
int except;
/*
* Prepare for disaster.
*/
if ((except = vstream_setjmp(session->stream)) != 0)
msg_fatal("%s while receiving server reply", exception_text(except));
/*
* Receive and process the server reply.
*/
netstring_get(session->stream, buffer, var_line_limit);
if (msg_verbose)
vstream_printf("<< %.*s\n", (int) LEN(buffer), STR(buffer));
if (STR(buffer)[0] != QMQP_STAT_OK)
msg_fatal("%s error: %.*s",
STR(buffer)[0] == QMQP_STAT_RETRY ? "recoverable" :
STR(buffer)[0] == QMQP_STAT_HARD ? "unrecoverable" :
"unknown", (int) LEN(buffer) - 1, STR(buffer) + 1);
/*
* Update the optional running counter.
*/
if (count) {
counter++;
vstream_printf("%d\r", counter);
vstream_fflush(VSTREAM_OUT);
}
/*
* Finish this session. QMQP sends only one message per session.
*/
event_disable_readwrite(vstream_fileno(session->stream));
vstream_fclose(session->stream);
session->stream = 0;
start_another(session);
}
/* usage - explain */
static void usage(char *myname)
{
msg_fatal("usage: %s -cv -s sess -l msglen -m msgs -C count -M myhostname -f from -t to -R delay -w delay host[:port]", myname);
}
MAIL_VERSION_STAMP_DECLARE;
/* main - parse JCL and start the machine */
int main(int argc, char **argv)
{
SESSION *session;
char *host;
char *port;
char *path;
int path_len;
int sessions = 1;
int ch;
ssize_t len;
int n;
int i;
char *buf;
const char *parse_err;
struct addrinfo *res;
int aierr;
const char *protocols = INET_PROTO_NAME_ALL;
/*
* Fingerprint executables and core dumps.
*/
MAIL_VERSION_STAMP_ALLOCATE;
signal(SIGPIPE, SIG_IGN);
msg_vstream_init(argv[0], VSTREAM_ERR);
/*
* Parse JCL.
*/
while ((ch = GETOPT(argc, argv, "46cC:f:l:m:M:r:R:s:t:vw:")) > 0) {
switch (ch) {
case '4':
protocols = INET_PROTO_NAME_IPV4;
break;
case '6':
protocols = INET_PROTO_NAME_IPV6;
break;
case 'c':
count++;
break;
case 'C':
if ((connect_count = atoi(optarg)) <= 0)
usage(argv[0]);
break;
case 'f':
sender = optarg;
break;
case 'l':
if ((message_length = atoi(optarg)) <= 0)
usage(argv[0]);
break;
case 'm':
if ((message_count = atoi(optarg)) <= 0)
usage(argv[0]);
break;
case 'M':
if (*optarg == '[') {
if (!valid_mailhost_literal(optarg, DO_GRIPE))
msg_fatal("bad address literal: %s", optarg);
} else {
if (!valid_hostname(optarg, DO_GRIPE))
msg_fatal("bad hostname: %s", optarg);
}
var_myhostname = optarg;
break;
case 'r':
if ((recipients = atoi(optarg)) <= 0)
usage(argv[0]);
break;
case 'R':
if (fixed_delay > 0 || (random_delay = atoi(optarg)) <= 0)
usage(argv[0]);
break;
case 's':
if ((sessions = atoi(optarg)) <= 0)
usage(argv[0]);
break;
case 't':
recipient = optarg;
break;
case 'v':
msg_verbose++;
break;
case 'w':
if (random_delay > 0 || (fixed_delay = atoi(optarg)) <= 0)
usage(argv[0]);
break;
default:
usage(argv[0]);
}
}
if (argc - optind != 1)
usage(argv[0]);
if (random_delay > 0)
srand(getpid());
/*
* Translate endpoint address to internal form.
*/
(void) inet_proto_init("protocols", protocols);
if (strncmp(argv[optind], "unix:", 5) == 0) {
path = argv[optind] + 5;
path_len = strlen(path);
if (path_len >= (int) sizeof(sun.sun_path))
msg_fatal("unix-domain name too long: %s", path);
memset((void *) &sun, 0, sizeof(sun));
sun.sun_family = AF_UNIX;
#ifdef HAS_SUN_LEN
sun.sun_len = path_len + 1;
#endif
memcpy(sun.sun_path, path, path_len);
sa = (struct sockaddr *) &sun;
sa_length = sizeof(sun);
} else {
if (strncmp(argv[optind], "inet:", 5) == 0)
argv[optind] += 5;
buf = mystrdup(argv[optind]);
if ((parse_err = host_port(buf, &host, (char *) 0, &port, "628")) != 0)
msg_fatal("%s: %s", argv[optind], parse_err);
if ((aierr = hostname_to_sockaddr(host, port, SOCK_STREAM, &res)) != 0)
msg_fatal("%s: %s", argv[optind], MAI_STRERROR(aierr));
myfree(buf);
sa = (struct sockaddr *) &ss;
if (res->ai_addrlen > sizeof(ss))
msg_fatal("address length %d > buffer length %d",
(int) res->ai_addrlen, (int) sizeof(ss));
memcpy((void *) sa, res->ai_addr, res->ai_addrlen);
sa_length = res->ai_addrlen;
#ifdef HAS_SA_LEN
sa->sa_len = sa_length;
#endif
freeaddrinfo(res);
}
/*
* Allocate space for temporary buffer.
*/
buffer = vstring_alloc(100);
/*
* Make sure we have sender and recipient addresses.
*/
if (var_myhostname == 0)
var_myhostname = get_hostname();
if (sender == 0 || recipient == 0) {
vstring_sprintf(buffer, "foo@%s", var_myhostname);
defaddr = mystrdup(vstring_str(buffer));
if (sender == 0)
sender = defaddr;
if (recipient == 0)
recipient = defaddr;
}
/*
* Prepare some results that may be used multiple times: the message
* content netstring, the sender netstring, and the recipient netstrings.
*/
mydate = mail_date(time((time_t *) 0));
mypid = getpid();
message_buffer = vstring_alloc(message_length + 200);
vstring_sprintf(buffer,
"From: <%s>\nTo: <%s>\nDate: %s\nMessage-Id: <%d@%s>\n\n",
sender, recipient, mydate, mypid, var_myhostname);
for (n = 1; LEN(buffer) < message_length; n++) {
for (i = 0; i < n && i < 79; i++)
VSTRING_ADDCH(buffer, 'X');
VSTRING_ADDCH(buffer, '\n');
}
STR(buffer)[message_length - 1] = '\n';
netstring_memcpy(message_buffer, STR(buffer), message_length);
len = strlen(sender);
sender_buffer = vstring_alloc(len);
netstring_memcpy(sender_buffer, sender, len);
if (recipients == 1) {
len = strlen(recipient);
recipient_buffer = vstring_alloc(len);
netstring_memcpy(recipient_buffer, recipient, len);
} else {
recipient_buffer = vstring_alloc(100);
for (n = 0; n < recipients; n++) {
vstring_sprintf(buffer, "%d%s", n, recipient);
netstring_memcat(recipient_buffer, STR(buffer), LEN(buffer));
}
}
/*
* Start sessions.
*/
while (sessions-- > 0) {
session = (SESSION *) mymalloc(sizeof(*session));
session->stream = 0;
session->xfer_count = 0;
session->connect_count = connect_count;
session->next = 0;
session_count++;
startup(session);
}
for (;;) {
event_loop(-1);
if (session_count <= 0 && message_count <= 0) {
if (count) {
VSTREAM_PUTC('\n', VSTREAM_OUT);
vstream_fflush(VSTREAM_OUT);
}
exit(0);
}
}
}