* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * $Id$
*
* Trivial file transfer protocol server.
*
* SUCH DAMAGE.
*/
-#include "setup.h" /* portability help from the lib directory */
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
+#include "server_setup.h"
+
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-
+#ifdef HAVE_SIGNAL_H
#include <signal.h>
-
+#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
#ifdef HAVE_ARPA_TFTP_H
#include <arpa/tftp.h>
#else
#endif
#include <setjmp.h>
-#include <stdio.h>
-#include <errno.h>
-#include <ctype.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
+
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include "curlx.h" /* from the private lib dir */
#include "getpart.h"
#include "util.h"
+#include "server_sockaddr.h"
/* include memdebug.h last */
#include "memdebug.h"
+/*****************************************************************************
+* STRUCT DECLARATIONS AND DEFINES *
+*****************************************************************************/
+
+#ifndef PKTSIZE
+#define PKTSIZE (SEGSIZE + 4) /* SEGSIZE defined in arpa/tftp.h */
+#endif
+
struct testcase {
char *buffer; /* holds the file data to send to the client */
size_t bufsize; /* size of the data in buffer */
char *rptr; /* read pointer into the buffer */
size_t rcount; /* amount of data left to read of the file */
- long num; /* test case number */
+ long testno; /* test case number */
int ofile; /* file descriptor for output file when uploading to us */
- FILE *server; /* write input "protocol" there for client verification */
+
+ int writedelay; /* number of seconds between each packet */
};
-static int synchnet(curl_socket_t);
-static struct tftphdr *r_init(void);
-static struct tftphdr *w_init(void);
-static int readit(struct testcase *test, struct tftphdr **dpp, int convert);
-static int writeit(struct testcase *test, struct tftphdr **dpp, int ct,
- int convert);
-static void mysignal(int, void (*func)(int));
+struct formats {
+ const char *f_mode;
+ int f_convert;
+};
+struct errmsg {
+ int e_code;
+ const char *e_msg;
+};
-#define TIMEOUT 5
+typedef union {
+ struct tftphdr hdr;
+ char storage[PKTSIZE];
+} tftphdr_storage_t;
-#define PKTSIZE SEGSIZE+4
+/*
+ * bf.counter values in range [-1 .. SEGSIZE] represents size of data in the
+ * bf.buf buffer. Additionally it can also hold flags BF_ALLOC or BF_FREE.
+ */
-struct formats;
-static int tftp(struct testcase *test, struct tftphdr *tp, int size);
-static void nak(int error);
-static void sendtftp(struct testcase *test, struct formats *pf);
-static void recvtftp(struct testcase *test, struct formats *pf);
-static int validate_access(struct testcase *test, const char *, int);
+struct bf {
+ int counter; /* size of data in buffer, or flag */
+ tftphdr_storage_t buf; /* room for data packet */
+};
-static curl_socket_t peer;
-static int rexmtval = TIMEOUT;
-static int maxtimeout = 5*TIMEOUT;
+#define BF_ALLOC -3 /* alloc'd but not yet filled */
+#define BF_FREE -2 /* free */
-static char buf[PKTSIZE];
-static char ackbuf[PKTSIZE];
-static struct sockaddr_in from;
-static socklen_t fromlen;
+#define opcode_RRQ 1
+#define opcode_WRQ 2
+#define opcode_DATA 3
+#define opcode_ACK 4
+#define opcode_ERROR 5
-struct bf {
- int counter; /* size of data in buffer, or flag */
- char buf[PKTSIZE]; /* room for data packet */
-} bfs[2];
+#define TIMEOUT 5
+
+#undef MIN
+#define MIN(x,y) ((x)<(y)?(x):(y))
+
+#ifndef DEFAULT_LOGFILE
+#define DEFAULT_LOGFILE "log/tftpd.log"
+#endif
+
+#define REQUEST_DUMP "log/server.input"
+
+#define DEFAULT_PORT 8999 /* UDP */
- /* Values for bf.counter */
-#define BF_ALLOC -3 /* alloc'd but not yet filled */
-#define BF_FREE -2 /* free */
-/* [-1 .. SEGSIZE] = size of data in the data buffer */
+/*****************************************************************************
+* GLOBAL VARIABLES *
+*****************************************************************************/
+
+static struct errmsg errmsgs[] = {
+ { EUNDEF, "Undefined error code" },
+ { ENOTFOUND, "File not found" },
+ { EACCESS, "Access violation" },
+ { ENOSPACE, "Disk full or allocation exceeded" },
+ { EBADOP, "Illegal TFTP operation" },
+ { EBADID, "Unknown transfer ID" },
+ { EEXISTS, "File already exists" },
+ { ENOUSER, "No such user" },
+ { -1, 0 }
+};
+
+static struct formats formata[] = {
+ { "netascii", 1 },
+ { "octet", 0 },
+ { NULL, 0 }
+};
+
+static struct bf bfs[2];
static int nextone; /* index of next buffer to use */
static int current; /* index of buffer in use */
- /* control flags for crlf conversions */
-int newline = 0; /* fillbuf: in middle of newline expansion */
-int prevchar = -1; /* putbuf: previous char (cr check) */
+ /* control flags for crlf conversions */
+static int newline = 0; /* fillbuf: in middle of newline expansion */
+static int prevchar = -1; /* putbuf: previous char (cr check) */
+
+static tftphdr_storage_t buf;
+static tftphdr_storage_t ackbuf;
+
+static srvr_sockaddr_union_t from;
+static curl_socklen_t fromlen;
+
+static curl_socket_t peer = CURL_SOCKET_BAD;
+
+static int timeout;
+static int maxtimeout = 5 * TIMEOUT;
+
+#ifdef ENABLE_IPV6
+static bool use_ipv6 = FALSE;
+#endif
+static const char *ipv_inuse = "IPv4";
+
+const char *serverlogfile = DEFAULT_LOGFILE;
+static char *pidname= (char *)".tftpd.pid";
+static int serverlogslocked = 0;
+static int wrotepidfile = 0;
+
+#ifdef HAVE_SIGSETJMP
+static sigjmp_buf timeoutbuf;
+#endif
+
+#if defined(HAVE_ALARM) && defined(SIGALRM)
+static int rexmtval = TIMEOUT;
+#endif
+
+/* do-nothing macro replacement for systems which lack siginterrupt() */
+
+#ifndef HAVE_SIGINTERRUPT
+#define siginterrupt(x,y) do {} while(0)
+#endif
+
+/* vars used to keep around previous signal handlers */
+
+typedef RETSIGTYPE (*SIGHANDLER_T)(int);
+
+#ifdef SIGHUP
+static SIGHANDLER_T old_sighup_handler = SIG_ERR;
+#endif
+
+#ifdef SIGPIPE
+static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
+#endif
+
+#ifdef SIGINT
+static SIGHANDLER_T old_sigint_handler = SIG_ERR;
+#endif
+
+#ifdef SIGTERM
+static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
+#endif
+
+#if defined(SIGBREAK) && defined(WIN32)
+static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
+#endif
+
+/* var which if set indicates that the program should finish execution */
+
+SIG_ATOMIC_T got_exit_signal = 0;
+
+/* if next is set indicates the first signal handled in exit_signal_handler */
+
+static volatile int exit_signal = 0;
+
+/*****************************************************************************
+* FUNCTION PROTOTYPES *
+*****************************************************************************/
-static void read_ahead(struct testcase *test,
- int convert /* if true, convert to ascii */);
-static ssize_t write_behind(struct testcase *test, int convert);
static struct tftphdr *rw_init(int);
-static struct tftphdr *w_init(void) { return rw_init(0); } /* write-behind */
-static struct tftphdr *r_init(void) { return rw_init(1); } /* read-ahead */
-static struct tftphdr *
-rw_init(int x) /* init for either read-ahead or write-behind */
-{ /* zero for write-behind, one for read-head */
- newline = 0; /* init crlf flag */
+static struct tftphdr *w_init(void);
+
+static struct tftphdr *r_init(void);
+
+static void read_ahead(struct testcase *test, int convert);
+
+static ssize_t write_behind(struct testcase *test, int convert);
+
+static int synchnet(curl_socket_t);
+
+static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size);
+
+static int validate_access(struct testcase *test, const char *fname, int mode);
+
+static void sendtftp(struct testcase *test, struct formats *pf);
+
+static void recvtftp(struct testcase *test, struct formats *pf);
+
+static void nak(int error);
+
+#if defined(HAVE_ALARM) && defined(SIGALRM)
+
+static void mysignal(int sig, void (*handler)(int));
+
+static void timer(int signum);
+
+static void justtimeout(int signum);
+
+#endif /* HAVE_ALARM && SIGALRM */
+
+static RETSIGTYPE exit_signal_handler(int signum);
+
+static void install_signal_handlers(void);
+
+static void restore_signal_handlers(void);
+
+/*****************************************************************************
+* FUNCTION IMPLEMENTATIONS *
+*****************************************************************************/
+
+#if defined(HAVE_ALARM) && defined(SIGALRM)
+
+/*
+ * Like signal(), but with well-defined semantics.
+ */
+static void mysignal(int sig, void (*handler)(int))
+{
+ struct sigaction sa;
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = handler;
+ sigaction(sig, &sa, NULL);
+}
+
+static void timer(int signum)
+{
+ (void)signum;
+
+ logmsg("alarm!");
+
+ timeout += rexmtval;
+ if(timeout >= maxtimeout) {
+ if(wrotepidfile) {
+ wrotepidfile = 0;
+ unlink(pidname);
+ }
+ if(serverlogslocked) {
+ serverlogslocked = 0;
+ clear_advisor_read_lock(SERVERLOGS_LOCK);
+ }
+ exit(1);
+ }
+#ifdef HAVE_SIGSETJMP
+ siglongjmp(timeoutbuf, 1);
+#endif
+}
+
+static void justtimeout(int signum)
+{
+ (void)signum;
+}
+
+#endif /* HAVE_ALARM && SIGALRM */
+
+/* signal handler that will be triggered to indicate that the program
+ should finish its execution in a controlled manner as soon as possible.
+ The first time this is called it will set got_exit_signal to one and
+ store in exit_signal the signal that triggered its execution. */
+
+static RETSIGTYPE exit_signal_handler(int signum)
+{
+ int old_errno = errno;
+ if(got_exit_signal == 0) {
+ got_exit_signal = 1;
+ exit_signal = signum;
+ }
+ (void)signal(signum, exit_signal_handler);
+ errno = old_errno;
+}
+
+static void install_signal_handlers(void)
+{
+#ifdef SIGHUP
+ /* ignore SIGHUP signal */
+ if((old_sighup_handler = signal(SIGHUP, SIG_IGN)) == SIG_ERR)
+ logmsg("cannot install SIGHUP handler: %s", strerror(errno));
+#endif
+#ifdef SIGPIPE
+ /* ignore SIGPIPE signal */
+ if((old_sigpipe_handler = signal(SIGPIPE, SIG_IGN)) == SIG_ERR)
+ logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
+#endif
+#ifdef SIGINT
+ /* handle SIGINT signal with our exit_signal_handler */
+ if((old_sigint_handler = signal(SIGINT, exit_signal_handler)) == SIG_ERR)
+ logmsg("cannot install SIGINT handler: %s", strerror(errno));
+ else
+ siginterrupt(SIGINT, 1);
+#endif
+#ifdef SIGTERM
+ /* handle SIGTERM signal with our exit_signal_handler */
+ if((old_sigterm_handler = signal(SIGTERM, exit_signal_handler)) == SIG_ERR)
+ logmsg("cannot install SIGTERM handler: %s", strerror(errno));
+ else
+ siginterrupt(SIGTERM, 1);
+#endif
+#if defined(SIGBREAK) && defined(WIN32)
+ /* handle SIGBREAK signal with our exit_signal_handler */
+ if((old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler)) == SIG_ERR)
+ logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
+ else
+ siginterrupt(SIGBREAK, 1);
+#endif
+}
+
+static void restore_signal_handlers(void)
+{
+#ifdef SIGHUP
+ if(SIG_ERR != old_sighup_handler)
+ (void)signal(SIGHUP, old_sighup_handler);
+#endif
+#ifdef SIGPIPE
+ if(SIG_ERR != old_sigpipe_handler)
+ (void)signal(SIGPIPE, old_sigpipe_handler);
+#endif
+#ifdef SIGINT
+ if(SIG_ERR != old_sigint_handler)
+ (void)signal(SIGINT, old_sigint_handler);
+#endif
+#ifdef SIGTERM
+ if(SIG_ERR != old_sigterm_handler)
+ (void)signal(SIGTERM, old_sigterm_handler);
+#endif
+#if defined(SIGBREAK) && defined(WIN32)
+ if(SIG_ERR != old_sigbreak_handler)
+ (void)signal(SIGBREAK, old_sigbreak_handler);
+#endif
+}
+
+/*
+ * init for either read-ahead or write-behind.
+ * zero for write-behind, one for read-head.
+ */
+static struct tftphdr *rw_init(int x)
+{
+ newline = 0; /* init crlf flag */
prevchar = -1;
bfs[0].counter = BF_ALLOC; /* pass out the first buffer */
current = 0;
bfs[1].counter = BF_FREE;
nextone = x; /* ahead or behind? */
- return (struct tftphdr *)bfs[0].buf;
+ return &bfs[0].buf.hdr;
+}
+
+static struct tftphdr *w_init(void)
+{
+ return rw_init(0); /* write-behind */
}
+static struct tftphdr *r_init(void)
+{
+ return rw_init(1); /* read-ahead */
+}
/* Have emptied current buffer by sending to net and getting ack.
Free it and return next buffer filled with data.
*/
static int readit(struct testcase *test, struct tftphdr **dpp,
- int convert /* if true, convert to ascii */)
+ int convert /* if true, convert to ascii */)
{
struct bf *b;
b = &bfs[current]; /* look at new buffer */
if (b->counter == BF_FREE) /* if it's empty */
- read_ahead(test, convert); /* fill it */
+ read_ahead(test, convert); /* fill it */
- *dpp = (struct tftphdr *)b->buf; /* set caller's ptr */
+ *dpp = &b->buf.hdr; /* set caller's ptr */
return b->counter;
}
-#undef MIN /* some systems have this defined already, some don't */
-#define MIN(x,y) ((x)<(y)?(x):(y));
-
/*
* fill the input buffer, doing ascii conversions if requested
* conversions are lf -> cr,lf and cr -> cr, nul
return;
nextone = !nextone; /* "incr" next buffer ptr */
- dp = (struct tftphdr *)b->buf;
+ dp = &b->buf.hdr;
if (convert == 0) {
/* The former file reading code did this:
newline = 1;
}
}
- *p++ = c;
+ *p++ = (char)c;
}
b->counter = (int)(p - dp->th_data);
}
/* Update count associated with the buffer, get new buffer from the queue.
Calls write_behind only if next buffer not available.
*/
-static int writeit(struct testcase *test, struct tftphdr **dpp,
+static int writeit(struct testcase *test, struct tftphdr * volatile *dpp,
int ct, int convert)
{
bfs[current].counter = ct; /* set size of data to write */
if (bfs[current].counter != BF_FREE) /* if not free */
write_behind(test, convert); /* flush it */
bfs[current].counter = BF_ALLOC; /* mark as alloc'd */
- *dpp = (struct tftphdr *)bfs[current].buf;
+ *dpp = &bfs[current].buf.hdr;
return ct; /* this is a lie of course */
}
*/
static ssize_t write_behind(struct testcase *test, int convert)
{
- char *buf;
+ char *writebuf;
int count;
int ct;
char *p;
if(!test->ofile) {
char outfile[256];
- snprintf(outfile, sizeof(outfile), "log/upload.%ld", test->num);
+ snprintf(outfile, sizeof(outfile), "log/upload.%ld", test->testno);
test->ofile=open(outfile, O_CREAT|O_RDWR, 0777);
if(test->ofile == -1) {
logmsg("Couldn't create and/or open file %s for upload!", outfile);
count = b->counter; /* remember byte count */
b->counter = BF_FREE; /* reset flag */
- dp = (struct tftphdr *)b->buf;
+ dp = &b->buf.hdr;
nextone = !nextone; /* incr for next time */
- buf = dp->th_data;
+ writebuf = dp->th_data;
if (count <= 0)
return -1; /* nak logic? */
if (convert == 0)
- return write(test->ofile, buf, count);
+ return write(test->ofile, writebuf, count);
- p = buf;
+ p = writebuf;
ct = count;
while (ct--) { /* loop over the buffer */
c = *p++; /* pick up a character */
}
/* formerly
putc(c, file); */
- write(test->ofile, &c, 1);
+ if(1 != write(test->ofile, &c, 1))
+ break;
skipit:
prevchar = c;
}
return count;
}
-
/* When an error has occurred, it is possible that the two sides are out of
* synch. Ie: that what I think is the other side's response to packet N is
* really their response to packet N-1.
#endif
int j = 0;
char rbuf[PKTSIZE];
- struct sockaddr_in from;
- socklen_t fromlen;
+ srvr_sockaddr_union_t fromaddr;
+ curl_socklen_t fromaddrlen;
- while (1) {
+ for (;;) {
#if defined(HAVE_IOCTLSOCKET)
(void) ioctlsocket(f, FIONREAD, &i);
#else
#endif
if (i) {
j++;
- fromlen = sizeof from;
- (void) recvfrom(f, rbuf, sizeof (rbuf), 0,
- (struct sockaddr *)&from, &fromlen);
+#ifdef ENABLE_IPV6
+ if(!use_ipv6)
+#endif
+ fromaddrlen = sizeof(fromaddr.sa4);
+#ifdef ENABLE_IPV6
+ else
+ fromaddrlen = sizeof(fromaddr.sa6);
+#endif
+ (void) recvfrom(f, rbuf, sizeof(rbuf), 0,
+ &fromaddr.sa, &fromaddrlen);
}
else
break;
return j;
}
-#if defined(HAVE_ALARM) && defined(SIGALRM)
-/*
- * Like signal(), but with well-defined semantics.
- */
-static void mysignal(int sig, void (*handler)(int))
-{
- struct sigaction sa;
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = handler;
- sigaction(sig, &sa, NULL);
-}
-#endif
-
-#ifndef DEFAULT_LOGFILE
-#define DEFAULT_LOGFILE "log/tftpd.log"
-#endif
-
-#define DEFAULT_PORT 8999 /* UDP */
-const char *serverlogfile = DEFAULT_LOGFILE;
-
-#define REQUEST_DUMP "log/server.input"
-
-char use_ipv6=FALSE;
-
int main(int argc, char **argv)
{
- struct sockaddr_in me;
-#ifdef ENABLE_IPV6
- struct sockaddr_in6 me6;
-#endif /* ENABLE_IPV6 */
-
+ srvr_sockaddr_union_t me;
struct tftphdr *tp;
- int n = 0;
+ ssize_t n = 0;
int arg = 1;
- FILE *pidfile;
- char *pidname= (char *)".tftpd.pid";
unsigned short port = DEFAULT_PORT;
- curl_socket_t sock;
+ curl_socket_t sock = CURL_SOCKET_BAD;
int flag;
int rc;
+ int error;
+ long pid;
struct testcase test;
+ int result = 0;
+
+ memset(&test, 0, sizeof(test));
while(argc>arg) {
if(!strcmp("--version", argv[arg])) {
if(argc>arg)
pidname = argv[arg++];
}
+ else if(!strcmp("--logfile", argv[arg])) {
+ arg++;
+ if(argc>arg)
+ serverlogfile = argv[arg++];
+ }
+ else if(!strcmp("--ipv4", argv[arg])) {
+#ifdef ENABLE_IPV6
+ ipv_inuse = "IPv4";
+ use_ipv6 = FALSE;
+#endif
+ arg++;
+ }
else if(!strcmp("--ipv6", argv[arg])) {
#ifdef ENABLE_IPV6
- use_ipv6=TRUE;
+ ipv_inuse = "IPv6";
+ use_ipv6 = TRUE;
#endif
arg++;
}
- else if(argc>arg) {
-
- if(atoi(argv[arg]))
- port = (unsigned short)atoi(argv[arg++]);
-
- if(argc>arg)
- path = argv[arg++];
+ else if(!strcmp("--port", argv[arg])) {
+ arg++;
+ if(argc>arg) {
+ char *endptr;
+ unsigned long ulnum = strtoul(argv[arg], &endptr, 10);
+ if((endptr != argv[arg] + strlen(argv[arg])) ||
+ (ulnum < 1025UL) || (ulnum > 65535UL)) {
+ fprintf(stderr, "tftpd: invalid --port argument (%s)\n",
+ argv[arg]);
+ return 0;
+ }
+ port = curlx_ultous(ulnum);
+ arg++;
+ }
+ }
+ else if(!strcmp("--srcdir", argv[arg])) {
+ arg++;
+ if(argc>arg) {
+ path = argv[arg];
+ arg++;
+ }
+ }
+ else {
+ puts("Usage: tftpd [option]\n"
+ " --version\n"
+ " --logfile [file]\n"
+ " --pidfile [file]\n"
+ " --ipv4\n"
+ " --ipv6\n"
+ " --port [port]\n"
+ " --srcdir [path]");
+ return 0;
}
}
-#if defined(WIN32) && !defined(__CYGWIN__)
+#ifdef WIN32
win32_init();
atexit(win32_cleanup);
#endif
+ install_signal_handlers();
+
+ pid = (long)getpid();
+
#ifdef ENABLE_IPV6
if(!use_ipv6)
#endif
sock = socket(AF_INET6, SOCK_DGRAM, 0);
#endif
- if (sock < 0) {
- perror("opening stream socket");
- logmsg("Error opening socket");
- return 1;
+ if(CURL_SOCKET_BAD == sock) {
+ error = SOCKERRNO;
+ logmsg("Error creating socket: (%d) %s",
+ error, strerror(error));
+ result = 1;
+ goto tftpd_cleanup;
}
flag = 1;
- if (setsockopt
- (sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &flag,
- sizeof(int)) < 0) {
- perror("setsockopt(SO_REUSEADDR)");
+ if (0 != setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ (void *)&flag, sizeof(flag))) {
+ error = SOCKERRNO;
+ logmsg("setsockopt(SO_REUSEADDR) failed with error: (%d) %s",
+ error, strerror(error));
+ result = 1;
+ goto tftpd_cleanup;
}
#ifdef ENABLE_IPV6
if(!use_ipv6) {
#endif
- me.sin_family = AF_INET;
- me.sin_addr.s_addr = INADDR_ANY;
- me.sin_port = htons(port);
- rc = bind(sock, (struct sockaddr *) &me, sizeof(me));
+ memset(&me.sa4, 0, sizeof(me.sa4));
+ me.sa4.sin_family = AF_INET;
+ me.sa4.sin_addr.s_addr = INADDR_ANY;
+ me.sa4.sin_port = htons(port);
+ rc = bind(sock, &me.sa, sizeof(me.sa4));
#ifdef ENABLE_IPV6
}
else {
- memset(&me6, 0, sizeof(struct sockaddr_in6));
- me6.sin6_family = AF_INET6;
- me6.sin6_addr = in6addr_any;
- me6.sin6_port = htons(port);
- rc = bind(sock, (struct sockaddr *) &me6, sizeof(me6));
+ memset(&me.sa6, 0, sizeof(me.sa6));
+ me.sa6.sin6_family = AF_INET6;
+ me.sa6.sin6_addr = in6addr_any;
+ me.sa6.sin6_port = htons(port);
+ rc = bind(sock, &me.sa, sizeof(me.sa6));
}
#endif /* ENABLE_IPV6 */
- if(rc < 0) {
- perror("binding stream socket");
- logmsg("Error binding socket");
- return 1;
+ if(0 != rc) {
+ error = SOCKERRNO;
+ logmsg("Error binding socket on port %hu: (%d) %s",
+ port, error, strerror(error));
+ result = 1;
+ goto tftpd_cleanup;
}
- pidfile = fopen(pidname, "w");
- if(pidfile) {
- fprintf(pidfile, "%d\n", (int)getpid());
- fclose(pidfile);
+ wrotepidfile = write_pidfile(pidname);
+ if(!wrotepidfile) {
+ result = 1;
+ goto tftpd_cleanup;
}
- else
- fprintf(stderr, "Couldn't write pid file\n");
- logmsg("Running IPv%d version on port UDP/%d",
-#ifdef ENABLE_IPV6
- (use_ipv6?6:4)
-#else
- 4
-#endif
- , port );
-
- do {
- FILE *server;
+ logmsg("Running %s version on port UDP/%d", ipv_inuse, (int)port);
+ for (;;) {
fromlen = sizeof(from);
- n = recvfrom(sock, buf, sizeof (buf), 0,
- (struct sockaddr *)&from, &fromlen);
+#ifdef ENABLE_IPV6
+ if(!use_ipv6)
+#endif
+ fromlen = sizeof(from.sa4);
+#ifdef ENABLE_IPV6
+ else
+ fromlen = sizeof(from.sa6);
+#endif
+ n = (ssize_t)recvfrom(sock, &buf.storage[0], sizeof(buf.storage), 0,
+ &from.sa, &fromlen);
+ if(got_exit_signal)
+ break;
if (n < 0) {
- logmsg("recvfrom:\n");
- return 3;
+ logmsg("recvfrom");
+ result = 3;
+ break;
}
- from.sin_family = AF_INET;
+ set_advisor_read_lock(SERVERLOGS_LOCK);
+ serverlogslocked = 1;
- peer = socket(AF_INET, SOCK_DGRAM, 0);
- if (peer < 0) {
- logmsg("socket:\n");
- return 2;
+#ifdef ENABLE_IPV6
+ if(!use_ipv6) {
+#endif
+ from.sa4.sin_family = AF_INET;
+ peer = socket(AF_INET, SOCK_DGRAM, 0);
+ if(CURL_SOCKET_BAD == peer) {
+ logmsg("socket");
+ result = 2;
+ break;
+ }
+ if(connect(peer, &from.sa, sizeof(from.sa4)) < 0) {
+ logmsg("connect: fail");
+ result = 1;
+ break;
+ }
+#ifdef ENABLE_IPV6
}
-
- if (connect(peer, (struct sockaddr *)&from, sizeof(from)) < 0) {
- logmsg("connect: fail\n");
- return 1;
+ else {
+ from.sa6.sin6_family = AF_INET6;
+ peer = socket(AF_INET6, SOCK_DGRAM, 0);
+ if(CURL_SOCKET_BAD == peer) {
+ logmsg("socket");
+ result = 2;
+ break;
+ }
+ if(connect(peer, &from.sa, sizeof(from.sa6)) < 0) {
+ logmsg("connect: fail");
+ result = 1;
+ break;
+ }
}
+#endif
+
maxtimeout = 5*TIMEOUT;
- tp = (struct tftphdr *)buf;
+ tp = &buf.hdr;
tp->th_opcode = ntohs(tp->th_opcode);
- if (tp->th_opcode == RRQ || tp->th_opcode == WRQ) {
+ if (tp->th_opcode == opcode_RRQ || tp->th_opcode == opcode_WRQ) {
memset(&test, 0, sizeof(test));
- server = fopen(REQUEST_DUMP, "ab");
- if(!server)
+ if (do_tftp(&test, tp, n) < 0)
break;
- test.server = server;
- tftp(&test, tp, n);
if(test.buffer)
free(test.buffer);
}
- fclose(server);
sclose(peer);
- } while(1);
- return 0;
-}
+ peer = CURL_SOCKET_BAD;
-struct formats {
- const char *f_mode;
- int f_convert;
-} formats[] = {
- { "netascii", 1 },
- { "octet", 0 },
- { NULL, 0 }
-};
+ if(test.ofile > 0) {
+ close(test.ofile);
+ test.ofile = 0;
+ }
+
+ if(got_exit_signal)
+ break;
+
+ if(serverlogslocked) {
+ serverlogslocked = 0;
+ clear_advisor_read_lock(SERVERLOGS_LOCK);
+ }
+
+ logmsg("end of one transfer");
+
+ }
+
+tftpd_cleanup:
+
+ if(test.ofile > 0)
+ close(test.ofile);
+
+ if((peer != sock) && (peer != CURL_SOCKET_BAD))
+ sclose(peer);
+
+ if(sock != CURL_SOCKET_BAD)
+ sclose(sock);
+
+ if(got_exit_signal)
+ logmsg("signalled to die");
+
+ if(wrotepidfile)
+ unlink(pidname);
+
+ if(serverlogslocked) {
+ serverlogslocked = 0;
+ clear_advisor_read_lock(SERVERLOGS_LOCK);
+ }
+
+ restore_signal_handlers();
+
+ if(got_exit_signal) {
+ logmsg("========> %s tftpd (port: %d pid: %ld) exits with signal (%d)",
+ ipv_inuse, (int)port, pid, exit_signal);
+ /*
+ * To properly set the return status of the process we
+ * must raise the same signal SIGINT or SIGTERM that we
+ * caught and let the old handler take care of it.
+ */
+ raise(exit_signal);
+ }
+
+ logmsg("========> tftpd quits");
+ return result;
+}
/*
* Handle initial connection protocol.
*/
-static int tftp(struct testcase *test, struct tftphdr *tp, int size)
+static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size)
{
char *cp;
int first = 1, ecode;
struct formats *pf;
char *filename, *mode = NULL;
+ int error;
+ FILE *server;
+#ifdef USE_WINSOCK
+ DWORD recvtimeout, recvtimeoutbak;
+#endif
+
+ /* Open request dump file. */
+ server = fopen(REQUEST_DUMP, "ab");
+ if(!server) {
+ error = errno;
+ logmsg("fopen() failed with error: %d %s", error, strerror(error));
+ logmsg("Error opening file: %s", REQUEST_DUMP);
+ return -1;
+ }
/* store input protocol */
- fprintf(test->server, "opcode: %x\n", tp->th_opcode);
+ fprintf(server, "opcode: %x\n", tp->th_opcode);
cp = (char *)&tp->th_stuff;
filename = cp;
again:
- while (cp < buf + size) {
+ while (cp < &buf.storage[size]) {
if (*cp == '\0')
break;
cp++;
}
if (*cp) {
nak(EBADOP);
+ fclose(server);
return 3;
}
if (first) {
goto again;
}
/* store input protocol */
- fprintf(test->server, "filename: %s\n", filename);
+ fprintf(server, "filename: %s\n", filename);
- for (cp = mode; *cp; cp++)
- if (isupper((int)*cp))
- *cp = tolower((int)*cp);
+ for (cp = mode; cp && *cp; cp++)
+ if(ISUPPER(*cp))
+ *cp = (char)tolower((int)*cp);
/* store input protocol */
- fprintf(test->server, "mode: %s\n", mode);
+ fprintf(server, "mode: %s\n", mode);
+ fclose(server);
- for (pf = formats; pf->f_mode; pf++)
+ for (pf = formata; pf->f_mode; pf++)
if (strcmp(pf->f_mode, mode) == 0)
break;
if (!pf->f_mode) {
nak(ecode);
return 1;
}
- if (tp->th_opcode == WRQ)
+
+#ifdef USE_WINSOCK
+ recvtimeout = sizeof(recvtimeoutbak);
+ getsockopt(peer, SOL_SOCKET, SO_RCVTIMEO,
+ (char*)&recvtimeoutbak, (int*)&recvtimeout);
+ recvtimeout = TIMEOUT*1000;
+ setsockopt(peer, SOL_SOCKET, SO_RCVTIMEO,
+ (const char*)&recvtimeout, sizeof(recvtimeout));
+#endif
+
+ if (tp->th_opcode == opcode_WRQ)
recvtftp(test, pf);
else
sendtftp(test, pf);
+#ifdef USE_WINSOCK
+ recvtimeout = recvtimeoutbak;
+ setsockopt(peer, SOL_SOCKET, SO_RCVTIMEO,
+ (const char*)&recvtimeout, sizeof(recvtimeout));
+#endif
+
return 0;
}
+/* Based on the testno, parse the correct server commands. */
+static int parse_servercmd(struct testcase *req)
+{
+ FILE *stream;
+ char *filename;
+ int error;
+
+ filename = test2file(req->testno);
+
+ stream=fopen(filename, "rb");
+ if(!stream) {
+ error = errno;
+ logmsg("fopen() failed with error: %d %s", error, strerror(error));
+ logmsg(" [1] Error opening file: %s", filename);
+ logmsg(" Couldn't open test file %ld", req->testno);
+ return 1; /* done */
+ }
+ else {
+ char *orgcmd = NULL;
+ char *cmd = NULL;
+ size_t cmdsize = 0;
+ int num=0;
+
+ /* get the custom server control "commands" */
+ error = getpart(&orgcmd, &cmdsize, "reply", "servercmd", stream);
+ fclose(stream);
+ if(error) {
+ logmsg("getpart() failed with error: %d", error);
+ return 1; /* done */
+ }
+
+ cmd = orgcmd;
+ while(cmd && cmdsize) {
+ char *check;
+ if(1 == sscanf(cmd, "writedelay: %d", &num)) {
+ logmsg("instructed to delay %d secs between packets", num);
+ req->writedelay = num;
+ }
+ else {
+ logmsg("Unknown <servercmd> instruction found: %s", cmd);
+ }
+ /* try to deal with CRLF or just LF */
+ check = strchr(cmd, '\r');
+ if(!check)
+ check = strchr(cmd, '\n');
+
+ if(check) {
+ /* get to the letter following the newline */
+ while((*check == '\r') || (*check == '\n'))
+ check++;
+
+ if(!*check)
+ /* if we reached a zero, get out */
+ break;
+ cmd = check;
+ }
+ else
+ break;
+ }
+ if(orgcmd)
+ free(orgcmd);
+ }
+
+ return 0; /* OK! */
+}
+
+
/*
* Validate file access.
*/
const char *filename, int mode)
{
char *ptr;
- long testno;
+ long testno, partno;
+ int error;
+ char partbuf[80]="data";
logmsg("trying to get file: %s mode %x", filename, mode);
- if(!strncmp("verifiedserver", filename, 15)) {
+ if(!strncmp("verifiedserver", filename, 14)) {
char weare[128];
- size_t count = sprintf(weare, "WE ROOLZ: %d\r\n", (int)getpid());
+ size_t count = sprintf(weare, "WE ROOLZ: %ld\r\n", (long)getpid());
logmsg("Are-we-friendly question received");
test->buffer = strdup(weare);
ptr++; /* skip the slash */
/* skip all non-numericals following the slash */
- while(*ptr && !isdigit((int)*ptr))
+ while(*ptr && !ISDIGIT(*ptr))
ptr++;
/* get the number */
testno = strtol(ptr, &ptr, 10);
- logmsg("requested test number %d", testno);
+ if(testno > 10000) {
+ partno = testno % 10000;
+ testno /= 10000;
+ }
+ else
+ partno = 0;
+
+
+ logmsg("requested test number %ld part %ld", testno, partno);
+
+ test->testno = testno;
- test->num = testno;
+ (void)parse_servercmd(test);
file = test2file(testno);
+ if(0 != partno)
+ sprintf(partbuf, "data%ld", partno);
+
if(file) {
FILE *stream=fopen(file, "rb");
if(!stream) {
+ error = errno;
+ logmsg("fopen() failed with error: %d %s", error, strerror(error));
+ logmsg("Error opening file: %s", file);
logmsg("Couldn't open test file: %s", file);
return EACCESS;
}
else {
size_t count;
- test->buffer = (char *)spitout(stream, "reply", "data", &count);
+ error = getpart(&test->buffer, &count, "reply", partbuf, stream);
fclose(stream);
+ if(error) {
+ logmsg("getpart() failed with error: %d", error);
+ return EACCESS;
+ }
if(test->buffer) {
test->rptr = test->buffer; /* set read pointer */
test->bufsize = count; /* set total count */
return EACCESS; /* failure */
}
+ logmsg("file opened and all is good");
return 0;
}
-int timeout;
-#ifdef HAVE_SIGSETJMP
-sigjmp_buf timeoutbuf;
-#endif
-
-static void timer(int signum)
-{
- (void)signum;
-
- logmsg("alarm!");
-
- timeout += rexmtval;
- if (timeout >= maxtimeout)
- exit(1);
-#ifdef HAVE_SIGSETJMP
- siglongjmp(timeoutbuf, 1);
-#endif
-}
-
/*
* Send the requested file.
*/
static void sendtftp(struct testcase *test, struct formats *pf)
{
- struct tftphdr *dp;
- struct tftphdr *ap; /* ack packet */
- unsigned short block = 1;
int size;
ssize_t n;
+ /* This is volatile to live through a siglongjmp */
+ volatile unsigned short sendblock; /* block count */
+ struct tftphdr *sdp; /* data buffer */
+ struct tftphdr *sap; /* ack buffer */
+
+ sendblock = 1;
#if defined(HAVE_ALARM) && defined(SIGALRM)
mysignal(SIGALRM, timer);
#endif
- dp = r_init();
- ap = (struct tftphdr *)ackbuf;
+ sdp = r_init();
+ sap = &ackbuf.hdr;
do {
- size = readit(test, &dp, pf->f_convert);
+ size = readit(test, &sdp, pf->f_convert);
if (size < 0) {
nak(errno + 100);
return;
}
- dp->th_opcode = htons((u_short)DATA);
- dp->th_block = htons((u_short)block);
+ sdp->th_opcode = htons((unsigned short)opcode_DATA);
+ sdp->th_block = htons(sendblock);
timeout = 0;
#ifdef HAVE_SIGSETJMP
(void) sigsetjmp(timeoutbuf, 1);
#endif
+ if(test->writedelay) {
+ logmsg("Pausing %d seconds before %d bytes", test->writedelay,
+ size);
+ wait_ms(1000*test->writedelay);
+ }
+
send_data:
- if (swrite(peer, dp, size + 4) != size + 4) {
- logmsg("write\n");
+ if (swrite(peer, sdp, size + 4) != size + 4) {
+ logmsg("write");
return;
}
read_ahead(test, pf->f_convert);
#ifdef HAVE_ALARM
alarm(rexmtval); /* read the ack */
#endif
- n = sread(peer, ackbuf, sizeof (ackbuf));
+ n = sread(peer, &ackbuf.storage[0], sizeof(ackbuf.storage));
#ifdef HAVE_ALARM
alarm(0);
#endif
+ if(got_exit_signal)
+ return;
if (n < 0) {
- logmsg("read: fail\n");
+ logmsg("read: fail");
return;
}
- ap->th_opcode = ntohs((u_short)ap->th_opcode);
- ap->th_block = ntohs((u_short)ap->th_block);
+ sap->th_opcode = ntohs((unsigned short)sap->th_opcode);
+ sap->th_block = ntohs(sap->th_block);
- if (ap->th_opcode == ERROR) {
+ if (sap->th_opcode == opcode_ERROR) {
logmsg("got ERROR");
return;
}
- if (ap->th_opcode == ACK) {
- if (ap->th_block == block) {
+ if (sap->th_opcode == opcode_ACK) {
+ if (sap->th_block == sendblock) {
break;
}
/* Re-synchronize with the other side */
(void) synchnet(peer);
- if (ap->th_block == (block -1)) {
+ if (sap->th_block == (sendblock-1)) {
goto send_data;
}
}
}
- block++;
+ sendblock++;
} while (size == SEGSIZE);
}
-static void justquit(int signum)
-{
- (void)signum;
- exit(0);
-}
-
-
/*
* Receive a file.
*/
static void recvtftp(struct testcase *test, struct formats *pf)
{
- struct tftphdr *dp;
- struct tftphdr *ap; /* ack buffer */
- unsigned short block = 0;
ssize_t n, size;
+ /* These are volatile to live through a siglongjmp */
+ volatile unsigned short recvblock; /* block count */
+ struct tftphdr * volatile rdp; /* data buffer */
+ struct tftphdr *rap; /* ack buffer */
+
+ recvblock = 0;
+ rdp = w_init();
#if defined(HAVE_ALARM) && defined(SIGALRM)
mysignal(SIGALRM, timer);
#endif
- dp = w_init();
- ap = (struct tftphdr *)ackbuf;
+ rap = &ackbuf.hdr;
do {
timeout = 0;
- ap->th_opcode = htons((u_short)ACK);
- ap->th_block = htons((u_short)block);
- block++;
+ rap->th_opcode = htons((unsigned short)opcode_ACK);
+ rap->th_block = htons(recvblock);
+ recvblock++;
#ifdef HAVE_SIGSETJMP
(void) sigsetjmp(timeoutbuf, 1);
#endif
send_ack:
- if (swrite(peer, ackbuf, 4) != 4) {
+ if (swrite(peer, &ackbuf.storage[0], 4) != 4) {
logmsg("write: fail\n");
goto abort;
}
#ifdef HAVE_ALARM
alarm(rexmtval);
#endif
- n = sread(peer, dp, PKTSIZE);
+ n = sread(peer, rdp, PKTSIZE);
#ifdef HAVE_ALARM
alarm(0);
#endif
+ if(got_exit_signal)
+ goto abort;
if (n < 0) { /* really? */
logmsg("read: fail\n");
goto abort;
}
- dp->th_opcode = ntohs((u_short)dp->th_opcode);
- dp->th_block = ntohs((u_short)dp->th_block);
- if (dp->th_opcode == ERROR)
+ rdp->th_opcode = ntohs((unsigned short)rdp->th_opcode);
+ rdp->th_block = ntohs(rdp->th_block);
+ if (rdp->th_opcode == opcode_ERROR)
goto abort;
- if (dp->th_opcode == DATA) {
- if (dp->th_block == block) {
+ if (rdp->th_opcode == opcode_DATA) {
+ if (rdp->th_block == recvblock) {
break; /* normal */
}
/* Re-synchronize with the other side */
(void) synchnet(peer);
- if (dp->th_block == (block-1))
+ if (rdp->th_block == (recvblock-1))
goto send_ack; /* rexmit */
}
}
- size = writeit(test, &dp, (int)(n - 4), pf->f_convert);
+ size = writeit(test, &rdp, (int)(n - 4), pf->f_convert);
if (size != (n-4)) { /* ahem */
if (size < 0)
nak(errno + 100);
} while (size == SEGSIZE);
write_behind(test, pf->f_convert);
- ap->th_opcode = htons((u_short)ACK); /* send the "final" ack */
- ap->th_block = htons((u_short)(block));
- (void) swrite(peer, ackbuf, 4);
+ rap->th_opcode = htons((unsigned short)opcode_ACK); /* send the "final" ack */
+ rap->th_block = htons(recvblock);
+ (void) swrite(peer, &ackbuf.storage[0], 4);
#if defined(HAVE_ALARM) && defined(SIGALRM)
- mysignal(SIGALRM, justquit); /* just quit on timeout */
+ mysignal(SIGALRM, justtimeout); /* just abort read on timeout */
alarm(rexmtval);
#endif
- n = sread(peer, buf, sizeof(buf)); /* normally times out and quits */
+ /* normally times out and quits */
+ n = sread(peer, &buf.storage[0], sizeof(buf.storage));
#ifdef HAVE_ALARM
alarm(0);
#endif
- if (n >= 4 && /* if read some data */
- dp->th_opcode == DATA && /* and got a data block */
- block == dp->th_block) { /* then my last ack was lost */
- (void) swrite(peer, ackbuf, 4); /* resend final ack */
+ if(got_exit_signal)
+ goto abort;
+ if (n >= 4 && /* if read some data */
+ rdp->th_opcode == opcode_DATA && /* and got a data block */
+ recvblock == rdp->th_block) { /* then my last ack was lost */
+ (void) swrite(peer, &ackbuf.storage[0], 4); /* resend final ack */
}
abort:
return;
}
-struct errmsg {
- int e_code;
- const char *e_msg;
-} errmsgs[] = {
- { EUNDEF, "Undefined error code" },
- { ENOTFOUND, "File not found" },
- { EACCESS, "Access violation" },
- { ENOSPACE, "Disk full or allocation exceeded" },
- { EBADOP, "Illegal TFTP operation" },
- { EBADID, "Unknown transfer ID" },
- { EEXISTS, "File already exists" },
- { ENOUSER, "No such user" },
- { -1, 0 }
-};
-
/*
* Send a nak packet (error message). Error code passed in is one of the
* standard TFTP codes, or a UNIX errno offset by 100.
int length;
struct errmsg *pe;
- tp = (struct tftphdr *)buf;
- tp->th_opcode = htons((u_short)ERROR);
- tp->th_code = htons((u_short)error);
+ tp = &buf.hdr;
+ tp->th_opcode = htons((unsigned short)opcode_ERROR);
+ tp->th_code = htons((unsigned short)error);
for (pe = errmsgs; pe->e_code >= 0; pe++)
if (pe->e_code == error)
break;
pe->e_msg = strerror(error - 100);
tp->th_code = EUNDEF; /* set 'undef' errorcode */
}
- strcpy(tp->th_msg, pe->e_msg);
length = (int)strlen(pe->e_msg);
- tp->th_msg[length] = '\0';
+
+ /* we use memcpy() instead of strcpy() in order to avoid buffer overflow
+ * report from glibc with FORTIFY_SOURCE */
+ memcpy(tp->th_msg, pe->e_msg, length + 1);
length += 5;
- if (swrite(peer, buf, length) != length)
+ if (swrite(peer, &buf.storage[0], length) != length)
logmsg("nak: fail\n");
}
projects / platform / upstream / curl.git / blobdiff