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hush/patches/tftp_timeout_multicast.diff
Eric Andersen 70060d25d2 s/fileno\(stdin\)/STDIN_FILENO/g 
s/fileno\(stdout\)/STDOUT_FILENO/g
2004-03-27 10:02:48 +00:00

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Index: AUTHORS
===================================================================
RCS file: /var/cvs/busybox/AUTHORS,v
retrieving revision 1.40
diff -u -r1.40 AUTHORS
--- a/AUTHORS 9 Oct 2003 21:19:21 -0000 1.40
+++ b/AUTHORS 5 Mar 2004 15:45:47 -0000
@@ -92,6 +92,9 @@
Original author of BusyBox in 1995, 1996. Some of his code can
still be found hiding here and there...
+John Powers <jpp@ti.com>
+ Added multicast option (rfc2090) and timeout option (rfc2349) to tftp.
+
Tim Riker <Tim@Rikers.org>
bug fixes, member of fan club
Index: include/usage.h
===================================================================
RCS file: /var/cvs/busybox/include/usage.h,v
retrieving revision 1.191
diff -u -r1.191 usage.h
--- a/include/usage.h 25 Feb 2004 10:35:55 -0000 1.191
+++ b/include/usage.h 5 Mar 2004 15:45:59 -0000
@@ -2492,6 +2492,21 @@
#else
#define USAGE_TFTP_BS(a)
#endif
+#ifdef CONFIG_FEATURE_TFTP_TIMEOUT
+ #define USAGE_TFTP_TIMEOUT(a) a
+#else
+ #define USAGE_TFTP_TIMEOUT(a)
+#endif
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ #define USAGE_TFTP_MULTICAST(a) a
+#else
+ #define USAGE_TFTP_MULTICAST(a)
+#endif
+#ifdef CONFIG_FEATURE_TFTP_DEBUG
+ #define USAGE_TFTP_DEBUG(a) a
+#else
+ #define USAGE_TFTP_DEBUG(a)
+#endif
#define tftp_trivial_usage \
"[OPTION]... HOST [PORT]"
@@ -2508,6 +2523,16 @@
) \
USAGE_TFTP_BS( \
"\t-b SIZE\tTransfer blocks of SIZE octets.\n" \
+ ) \
+ USAGE_TFTP_TIMEOUT( \
+ "\t-T SEC\tClient timeout SEC seconds (default: 5).\n" \
+ "\t-t SEC\tServer timeout SEC seconds\n" \
+ ) \
+ USAGE_TFTP_MULTICAST( \
+ "\t-m\tMulticast get file.\n" \
+ ) \
+ USAGE_TFTP_DEBUG( \
+ "\t-D\tPrint debug messages.\n" \
)
#define time_trivial_usage \
"[OPTION]... COMMAND [ARGS...]"
Index: networking/Config.in
===================================================================
RCS file: /var/cvs/busybox/networking/Config.in,v
retrieving revision 1.27
diff -u -r1.27 Config.in
--- a/networking/Config.in 22 Feb 2004 12:25:47 -0000 1.27
+++ b/networking/Config.in 5 Mar 2004 15:45:59 -0000
@@ -522,6 +522,13 @@
Add support for the GET command within the TFTP client. This allows
a client to retrieve a file from a TFTP server.
+config CONFIG_FEATURE_TFTP_MULTICAST
+ bool " Enable \"multicast\" option"
+ default n
+ depends on CONFIG_FEATURE_TFTP_GET
+ help
+ Allow the client to receive multicast file transfers.
+
config CONFIG_FEATURE_TFTP_PUT
bool " Enable \"put\" command"
default y
@@ -531,12 +538,19 @@
a client to transfer a file to a TFTP server.
config CONFIG_FEATURE_TFTP_BLOCKSIZE
- bool " Enable \"blocksize\" command"
+ bool " Enable \"blksize\" option"
default n
depends on CONFIG_TFTP
help
Allow the client to specify the desired block size for transfers.
+config CONFIG_FEATURE_TFTP_TIMEOUT
+ bool " Enable \"timeout\" option"
+ default n
+ depends on CONFIG_TFTP
+ help
+ Allow the client to negotiate timeout option with server.
+
config CONFIG_FEATURE_TFTP_DEBUG
bool " Enable debug"
default n
Index: networking/tftp.c
===================================================================
RCS file: /var/cvs/busybox/networking/tftp.c,v
retrieving revision 1.25
diff -u -r1.25 tftp.c
--- a/networking/tftp.c 5 Mar 2004 13:04:39 -0000 1.25
+++ b/networking/tftp.c 5 Mar 2004 15:46:00 -0000
@@ -1,11 +1,26 @@
+/* vi: set sw=4 ts=4: */
/* ------------------------------------------------------------------------- */
/* tftp.c */
+/* Copyright (c) 2003, 2004 Texas Instruments */
+/* */
+/* This package is free software; you can redistribute it and/or */
+/* modify it under the terms of the license found in the file */
+/* named COPYING that should have accompanied this file. */
+/* */
+/* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
+/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
+/* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */
/* */
/* A simple tftp client for busybox. */
/* Tries to follow RFC1350. */
/* Only "octet" mode supported. */
/* Optional blocksize negotiation (RFC2347 + RFC2348) */
/* */
+/* New features added at Texas Instruments, October 2003 */
+/* Author: John Powers */
+/* Multicast option: rfc2090 */
+/* Timeout option: rfc2349 */
+/* */
/* Copyright (C) 2001 Magnus Damm <damm@opensource.se> */
/* */
/* Parts of the code based on: */
@@ -46,8 +61,20 @@
#include "busybox.h"
+#if defined(CONFIG_FEATURE_TFTP_BLOCKSIZE) || defined(CONFIG_FEATURE_TFTP_MULTICAST) || defined(CONFIG_FEATURE_TFTP_TIMEOUT)
+ #define TFTP_OPTIONS
+#endif
+
//#define CONFIG_FEATURE_TFTP_DEBUG
+#ifdef CONFIG_FEATURE_TFTP_DEBUG
+ static void printtime(void);
+ #define dprintf(fmt...) if (debug) {printtime(); printf(fmt);}
+ int debug = 0;
+#else
+ #define dprintf(fmt...)
+#endif
+
#define TFTP_BLOCKSIZE_DEFAULT 512 /* according to RFC 1350, don't change */
#define TFTP_TIMEOUT 5 /* seconds */
@@ -68,12 +95,24 @@
"Illegal TFTP operation",
"Unknown transfer ID",
"File already exists",
- "No such user"
+ "No such user",
+#ifdef TFTP_OPTIONS
+ "Unsupported option",
+#endif
};
const int tftp_cmd_get = 1;
const int tftp_cmd_put = 2;
+
+struct tftp_option {
+ int multicast;
+ int blksize;
+ int client_timeout;
+ int server_timeout;
+};
+
+
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
static int tftp_blocksize_check(int blocksize, int bufsize)
@@ -93,16 +132,158 @@
return blocksize;
}
+#endif
+
+#ifdef CONFIG_FEATURE_TFTP_TIMEOUT
+
+static int
+tftp_timeout_check(int timeout)
+{
+ /* Check if timeout seconds is valid:
+ * RFC2349 says between 1 and 255.
+ */
+
+ if (timeout < 1 || timeout > 255) {
+ bb_error_msg("bad timeout value");
+ return 0;
+ }
+ return timeout;
+}
+
+#endif
+
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+static int
+tftp_multicast_check(const char *opt, char **phost, unsigned short *pport, int *pactive)
+{
+ /* Option string contains comma delimited addr,port,active.
+ * addr = multicast IP address
+ * port = port number
+ * active = 1 if active client
+ * 0 if passive client
+ *
+ * Addr and port will be empty fields when the server notifies a
+ * passive client that it is now the active client.
+ *
+ * The host address string must be freed by the caller. Neither host
+ * nor port will be set/changed if the input fields are empty.
+ *
+ * If any tokenization errors occur in the opt string, the host
+ * address string is automatically freed.
+ *
+ * Return 0 if any tokenization error, 1 if all parameters are good.
+ */
+
+ char *token = NULL;
+ char *parse_buf = NULL;
+ char *tokenv = NULL;
+ char *host = NULL;
+ int port;
+ int active;
+
+ parse_buf = bb_xstrdup(opt);
+
+ dprintf("multicast option=%s\n", opt);
+
+ /* IP address */
+ if ((token = strtok_r(parse_buf, ",", &tokenv)) == NULL) {
+ dprintf("tftp_multicast_check: cannot parse IP address from %s\n", parse_buf);
+ free(parse_buf);
+ return 0;
+ }
+ if (strlen(token) > 0)
+ *phost = host = bb_xstrdup(token);
+
+ /* Port */
+ if ((token = strtok_r(NULL, ",", &tokenv)) == NULL) {
+ dprintf("tftp_multicast_check: cannot parse port number from %s\n", tokenv);
+ goto token_error;
+ }
+ if (strlen(token) > 0) {
+ port = atoi(token);
+ if (port < 0 || port > 0xFFFF) {
+ dprintf("tftp_multicast_check: bad port number (%d)\n", port);
+ goto token_error;
+ }
+ *pport = htons(port);
+ }
+
+ /* Active/passive */
+ if ((token = strtok_r(NULL, ",", &tokenv)) == NULL) {
+ dprintf("tftp_multicast_check: cannot parse active/passive from %s\n", tokenv);
+ goto token_error;
+ }
+ active = atoi(token);
+ if (active != 0 && active != 1) {
+ dprintf("tftp_multicast_check: bad active/passive flag (%d)\n", active);
+ goto token_error;
+ }
+ *pactive = active;
+
+ free(parse_buf);
+ return 1;
+
+token_error:
+ free(parse_buf);
+ if (host != NULL)
+ free(host);
+ *phost = NULL;
+ return 0;
+
+}
+
+#define VECTOR_QUANTUM_WIDTH 8
+#define VECTOR_QUANTUM_ALL_ONES ((1<<VECTOR_QUANTUM_WIDTH)-1)
+
+static void inline
+bit_set(int bit, unsigned char *vector)
+{
+ int offset = bit / VECTOR_QUANTUM_WIDTH;
+ int mask = 1 << (bit % VECTOR_QUANTUM_WIDTH);
+ vector[offset] |= mask;
+}
+
+static int inline
+bit_isset(int bit, const unsigned char *vector)
+{
+ int offset = bit / VECTOR_QUANTUM_WIDTH;
+ int mask = 1 << (bit % VECTOR_QUANTUM_WIDTH);
+ return vector[offset] & mask ? 1 : 0;
+}
+
+static int inline
+bit_lmz(const unsigned char *vector)
+{
+ /* Return number of left-most zero in bit vector */
+ const unsigned char *vp = vector;
+ int i;
+ unsigned char velem;
+
+ while (*vp == VECTOR_QUANTUM_ALL_ONES)
+ vp++;
+ velem = *vp;
+ for (i = 0; i < VECTOR_QUANTUM_WIDTH; i++) {
+ if ((velem & (1 << i)) == 0)
+ break;
+ }
+ dprintf("bit_lmz: block=%d\n", (vp - vector)*VECTOR_QUANTUM_WIDTH + i);
+ return (vp - vector)*VECTOR_QUANTUM_WIDTH + i;
+}
+
+#endif
+
+
+
+#ifdef TFTP_OPTIONS
+
static char *tftp_option_get(char *buf, int len, char *option)
{
- int opt_val = 0;
+ int opt_val = 0;
int opt_found = 0;
int k;
-
- while (len > 0) {
+ while (len > 0) {
/* Make sure the options are terminated correctly */
-
for (k = 0; k < len; k++) {
if (buf[k] == '\0') {
break;
@@ -117,9 +298,8 @@
if (strcasecmp(buf, option) == 0) {
opt_found = 1;
}
- }
- else {
- if (opt_found) {
+ } else {
+ if (opt_found) {
return buf;
}
}
@@ -138,7 +318,8 @@
#endif
static inline int tftp(const int cmd, const struct hostent *host,
- const char *remotefile, int localfd, const unsigned short port, int tftp_bufsize)
+ const char *remotefile, int localfd, const unsigned short port,
+ struct tftp_option *option)
{
const int cmd_get = cmd & tftp_cmd_get;
const int cmd_put = cmd & tftp_cmd_put;
@@ -155,18 +336,29 @@
int len;
int opcode = 0;
int finished = 0;
- int timeout = bb_tftp_num_retries;
+ int retry = bb_tftp_num_retries;
unsigned short block_nr = 1;
-#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
- int want_option_ack = 0;
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ struct hostent *mchost;
+ struct sockaddr_in mcsa;
+ char *mchostname;
+ unsigned short mcport;
+ unsigned char *mcblockmap = NULL;
+ int master_client = 1;
+ int mcfd = -1;
+ int mcmaxblock = 0x10000;
+ int ack_oack = 0;
+#else
+ #define master_client 1
+ #define ack_oack 0
#endif
/* Can't use RESERVE_CONFIG_BUFFER here since the allocation
* size varies meaning BUFFERS_GO_ON_STACK would fail */
- char *buf=xmalloc(tftp_bufsize + 4);
+ char *buf=xmalloc(option->blksize + 4);
- tftp_bufsize += 4;
+ int tftp_bufsize = option->blksize + 4;
if ((socketfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
bb_perror_msg("socket");
@@ -183,15 +375,21 @@
memcpy(&sa.sin_addr, (struct in_addr *) host->h_addr,
sizeof(sa.sin_addr));
- /* build opcode */
-
- if (cmd_get) {
- opcode = TFTP_RRQ;
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ if (option->multicast) {
+ const int bmsize = 0x10000 / VECTOR_QUANTUM_WIDTH;
+ if ((mcfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
+ bb_perror_msg("multicast socket");
+ return EXIT_FAILURE;
+ }
+ mcblockmap = xmalloc(bmsize+1);
+ memset(mcblockmap, 0, bmsize+1);
}
+#endif
- if (cmd_put) {
- opcode = TFTP_WRQ;
- }
+ /* build opcode */
+
+ opcode = cmd_get ? TFTP_RRQ : TFTP_WRQ;
while (1) {
@@ -203,7 +401,7 @@
cp += 2;
- /* add filename and mode */
+ /* First packet of file transfer includes file name, mode, and options */
if ((cmd_get && (opcode == TFTP_RRQ)) ||
(cmd_put && (opcode == TFTP_WRQ))) {
@@ -223,7 +421,7 @@
}
if (too_long || ((&buf[tftp_bufsize - 1] - cp) < 6)) {
- bb_error_msg("too long remote-filename");
+ bb_error_msg("too long: remote filename");
break;
}
@@ -238,8 +436,8 @@
if (len != TFTP_BLOCKSIZE_DEFAULT) {
- if ((&buf[tftp_bufsize - 1] - cp) < 15) {
- bb_error_msg("too long remote-filename");
+ if ((&buf[tftp_bufsize - 1] - cp) < 15) {
+ bb_error_msg("buffer too small for blksize option");
break;
}
@@ -249,16 +447,65 @@
cp += 8;
cp += snprintf(cp, 6, "%d", len) + 1;
+ }
+#endif
+
+
+
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+
+ if (option->multicast) {
+ if ((&buf[tftp_bufsize - 1] - cp) < 12) {
+ bb_error_msg("buffer too small for multicast option");
+ break;
+ }
+
+ /* add "multicast" option */
- want_option_ack = 1;
+ memcpy(cp, "multicast\0", 11);
+ cp += 11;
+
+ option->multicast = 0; /* turn back on when server accepts option */
+ ack_oack = 1; /* acknowledge OACK */
}
+
#endif
+
+#ifdef CONFIG_FEATURE_TFTP_TIMEOUT
+
+ if (option->server_timeout != TFTP_TIMEOUT) {
+ if ((&buf[tftp_bufsize - 1] - cp) < 12) {
+ bb_error_msg("buffer too small for timeout option");
+ break;
+ }
+
+ /* add "timeout" option */
+
+ memcpy(cp, "timeout", 8);
+ cp += 8;
+
+ cp += snprintf(cp, 4, "%d", option->server_timeout) + 1;
+ }
+#endif
+
}
/* add ack and data */
- if ((cmd_get && (opcode == TFTP_ACK)) ||
- (cmd_put && (opcode == TFTP_DATA))) {
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ else if (option->multicast && opcode == TFTP_ACK) {
+ if (master_client || ack_oack) {
+ int blocknum = bit_lmz(mcblockmap);
+ *((unsigned short *) cp) = htons(blocknum);
+ cp += 2;
+ if (blocknum >= mcmaxblock)
+ finished = 1;
+ dprintf("ack block %d/%d %s\n", blocknum, mcmaxblock, finished? "finished": "");
+ }
+ }
+#endif
+ else if ((cmd_get && opcode == TFTP_ACK) ||
+ (cmd_put && opcode == TFTP_DATA)) {
*((unsigned short *) cp) = htons(block_nr);
@@ -275,7 +522,7 @@
}
if (len != (tftp_bufsize - 4)) {
- finished++;
+ finished = 1;
}
cp += len;
@@ -283,82 +530,119 @@
}
- /* send packet */
+ /* send packet and receive reply */
- timeout = bb_tftp_num_retries; /* re-initialize */
+ retry = bb_tftp_num_retries; /* re-initialize */
do {
-
+ int selectrc;
len = cp - buf;
-#ifdef CONFIG_FEATURE_TFTP_DEBUG
- fprintf(stderr, "sending %u bytes\n", len);
- for (cp = buf; cp < &buf[len]; cp++)
- fprintf(stderr, "%02x ", (unsigned char)*cp);
- fprintf(stderr, "\n");
-#endif
- if (sendto(socketfd, buf, len, 0,
- (struct sockaddr *) &sa, sizeof(sa)) < 0) {
- bb_perror_msg("send");
- len = -1;
- break;
- }
-
+ /* send packet */
+ if ((len > 2) && (! option->multicast || master_client || ack_oack)) {
- if (finished && (opcode == TFTP_ACK)) {
- break;
+#ifdef CONFIG_FEATURE_TFTP_DEBUG
+ dprintf("sending %u bytes\n", len);
+ for (cp = buf; cp < &buf[len]; cp++)
+ if (debug)
+ printf("%02x ", *(unsigned char *)cp);
+ if (debug)
+ printf("\n");
+#endif
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ ack_oack = 0;
+#endif
+ if (sendto(socketfd, buf, len, 0, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
+ bb_perror_msg("send");
+ len = -1;
+ break;
+ }
+ if (finished && opcode == TFTP_ACK) {
+ break;
+ }
}
- /* receive packet */
+ /* receive reply packet */
memset(&from, 0, sizeof(from));
fromlen = sizeof(from);
- tv.tv_sec = TFTP_TIMEOUT;
+ tv.tv_sec = option->client_timeout;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_SET(socketfd, &rfds);
+ dprintf("set to receive from socketfd (%d)\n", socketfd);
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ if (option->multicast) {
+ FD_SET(mcfd, &rfds);
+ dprintf("set to receive from mcfd (%d)\n", mcfd);
+ }
+#endif
- switch (select(FD_SETSIZE, &rfds, NULL, NULL, &tv)) {
- case 1:
- len = recvfrom(socketfd, buf, tftp_bufsize, 0,
- (struct sockaddr *) &from, &fromlen);
-
- if (len < 0) {
- bb_perror_msg("recvfrom");
- break;
+ dprintf("select\n");
+ selectrc = select(FD_SETSIZE, &rfds, NULL, NULL, &tv);
+ if (selectrc > 0) {
+ /* A packet was received */
+ if (FD_ISSET(socketfd, &rfds)) { /* Unicast packet */
+ dprintf("from socketfd\n");
+ len = recvfrom(socketfd, buf, tftp_bufsize, 0, (struct sockaddr *) &from, &fromlen);
+
+ if (len < 0) {
+ bb_perror_msg("recvfrom");
+ } else {
+ if (sa.sin_port == port) {
+ sa.sin_port = from.sin_port;
+ }
+ if (sa.sin_port == from.sin_port) {
+ retry = 0;
+ } else {
+ /* bad packet */
+ /* discard the packet - treat as timeout */
+ retry = bb_tftp_num_retries;
+ bb_error_msg("timeout");
+ }
+ }
}
- timeout = 0;
-
- if (sa.sin_port == port) {
- sa.sin_port = from.sin_port;
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ else if (option->multicast && FD_ISSET(mcfd, &rfds)) { /* Multicast packet */
+ dprintf("from mcfd\n");
+ len = recvfrom(mcfd, buf, tftp_bufsize, 0, (struct sockaddr *) &from, &fromlen);
+ if (len < 0) {
+ bb_perror_msg("multicast recvfrom");
+ } else {
+ if (mcsa.sin_port == mcport) {
+ mcsa.sin_port = from.sin_port;
+ }
+ if (mcsa.sin_port == from.sin_port) {
+ retry = 0;
+ } else {
+ retry = bb_tftp_num_retries;
+ bb_error_msg("multicast timeout");
+ }
+ }
}
- if (sa.sin_port == from.sin_port) {
- break;
- }
-
- /* fall-through for bad packets! */
- /* discard the packet - treat as timeout */
- timeout = bb_tftp_num_retries;
+#endif
- case 0:
+ } else if (selectrc == 0) {
+ /* Time out */
+ dprintf("timeout\n");
bb_error_msg("timeout");
- timeout--;
- if (timeout == 0) {
+ retry--;
+ if (retry == 0) {
len = -1;
bb_error_msg("last timeout");
}
- break;
-
- default:
+ } else {
+ /* Error condition */
+ dprintf("error\n");
bb_perror_msg("select");
len = -1;
}
- } while (timeout && (len >= 0));
+ } while (retry && len >= 0);
if ((finished) || (len < 0)) {
break;
@@ -370,9 +654,8 @@
opcode = ntohs(*((unsigned short *) buf));
tmp = ntohs(*((unsigned short *) &buf[2]));
-#ifdef CONFIG_FEATURE_TFTP_DEBUG
- fprintf(stderr, "received %d bytes: %04x %04x\n", len, opcode, tmp);
-#endif
+ dprintf("received %d bytes: %04x %04x\n", len, opcode, tmp);
+ dprintf("master_client=%d\n", master_client);
if (opcode == TFTP_ERROR) {
char *msg = NULL;
@@ -393,55 +676,116 @@
break;
}
-#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
- if (want_option_ack) {
+#ifdef TFTP_OPTIONS
- want_option_ack = 0;
+ if (opcode == TFTP_OACK) {
- if (opcode == TFTP_OACK) {
+ /* server seems to support options */
- /* server seems to support options */
+ char *res;
+
+ block_nr = 0; /* acknowledge option packet with block number 0 */
+ opcode = cmd_put ? TFTP_DATA : TFTP_ACK;
- char *res;
- res = tftp_option_get(&buf[2], len-2,
- "blksize");
+#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
+ res = tftp_option_get(&buf[2], len-2, "blksize");
- if (res) {
- int blksize = atoi(res);
-
- if (tftp_blocksize_check(blksize,
- tftp_bufsize - 4)) {
+ if (res) {
+ int blksize = atoi(res);
- if (cmd_put) {
- opcode = TFTP_DATA;
- }
- else {
- opcode = TFTP_ACK;
- }
-#ifdef CONFIG_FEATURE_TFTP_DEBUG
- fprintf(stderr, "using blksize %u\n", blksize);
+ if (tftp_blocksize_check(blksize, tftp_bufsize - 4)) {
+ dprintf("using blksize %d\n", blksize);
+ tftp_bufsize = blksize + 4;
+ free(buf);
+ buf = xmalloc(tftp_bufsize);
+ } else {
+ bb_error_msg("bad blksize %d", blksize);
+ break;
+ }
+ }
#endif
- tftp_bufsize = blksize + 4;
- block_nr = 0;
- continue;
- }
- }
- /* FIXME:
- * we should send ERROR 8 */
- bb_error_msg("bad server option");
- break;
- }
- bb_error_msg("warning: blksize not supported by server"
- " - reverting to 512");
- tftp_bufsize = TFTP_BLOCKSIZE_DEFAULT + 4;
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ res = tftp_option_get(&buf[2], len-2, "multicast");
+
+ if (res) {
+ ack_oack = 1;
+ if (tftp_multicast_check(res, &mchostname, &mcport, &master_client)) {
+ struct ip_mreq mreq;
+ struct in_addr mcaddr;
+
+ dprintf("using multicast\n");
+
+ mchost = xgethostbyname(mchostname);
+ if (mchost) {
+ memcpy(&mcaddr, mchost->h_addr, mchost->h_length);
+ if (! IN_MULTICAST(ntohl(mcaddr.s_addr))) {
+ bb_error_msg("bad multicast address: %s", mchostname);
+ break;
+ }
+ } else {
+ bb_error_msg("bad multicast address: %s", mchostname);
+ break;
+ }
+
+ memset(&mcsa, 0, sizeof(mcsa));
+ mcsa.sin_family = AF_INET;
+ mcsa.sin_addr.s_addr = htonl(INADDR_ANY);
+ mcsa.sin_port = mcport;
+
+ bind(mcfd, (struct sockaddr *)&mcsa, sizeof(mcsa));
+
+ mreq.imr_multiaddr.s_addr = mcaddr.s_addr;
+ mreq.imr_interface.s_addr = htonl(INADDR_ANY);
+
+ if (setsockopt(mcfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
+ {
+ bb_error_msg("setsockopt");
+ break;
+ }
+
+ option->multicast = 1;
+ } else {
+ bb_error_msg("bad multicast option value: %s", res);
+ break;
+ }
+ }
+#endif
+
}
+ else
#endif
if (cmd_get && (opcode == TFTP_DATA)) {
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ if (option->multicast) {
+ int bn = tmp - 1;
+ /* Do I need this block? */
+ if (! bit_isset(bn, mcblockmap)) {
+ lseek(localfd, bn*(tftp_bufsize-4), SEEK_SET);
+ len = write(localfd, &buf[4], len-4);
+ if (len < 0) {
+ bb_perror_msg("write");
+ break;
+ }
+ bit_set(bn, mcblockmap);
+ if (len != (tftp_bufsize-4)) {
+ mcmaxblock = tmp;
+ dprintf("mcmaxblock=%d, (len(%d) != tftp_bufsize-4(%d))\n", mcmaxblock, len, tftp_bufsize-4);
+ }
+ opcode = TFTP_ACK;
+ }
+ /* Do not acknowledge block if I already have a copy of the block. A situation can arise when the server
+ * and client timeout nearly simultaneously. The server retransmits the block at the same time the client
+ * re-requests the block. From then on out, each block is transmitted twice--not a good use of bandwidth.
+ */
+ }
+ else
+#endif
+
if (tmp == block_nr) {
len = write(localfd, &buf[4], len - 4);
@@ -452,15 +796,14 @@
}
if (len != (tftp_bufsize - 4)) {
- finished++;
+ finished = 1;
}
opcode = TFTP_ACK;
- continue;
}
}
- if (cmd_put && (opcode == TFTP_ACK)) {
+ else if (cmd_put && opcode == TFTP_ACK) {
if (tmp == (unsigned short)(block_nr - 1)) {
if (finished) {
@@ -468,15 +811,19 @@
}
opcode = TFTP_DATA;
- continue;
}
}
}
#ifdef CONFIG_FEATURE_CLEAN_UP
close(socketfd);
+ free(buf);
+
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ if (mcblockmap != NULL)
+ free(mcblockmap);
+#endif
- free(buf);
#endif
return finished ? EXIT_SUCCESS : EXIT_FAILURE;
@@ -487,13 +834,18 @@
struct hostent *host = NULL;
char *localfile = NULL;
char *remotefile = NULL;
- int port;
+ unsigned short port;
int cmd = 0;
int fd = -1;
int flags = 0;
int opt;
int result;
- int blocksize = TFTP_BLOCKSIZE_DEFAULT;
+ struct tftp_option option = {
+ .multicast = 0,
+ .blksize = TFTP_BLOCKSIZE_DEFAULT,
+ .client_timeout = TFTP_TIMEOUT,
+ .server_timeout = TFTP_TIMEOUT,
+ };
/* figure out what to pass to getopt */
@@ -515,13 +867,45 @@
#define PUT
#endif
- while ((opt = getopt(argc, argv, BS GET PUT "l:r:")) != -1) {
+#ifdef CONFIG_FEATURE_TFTP_TIMEOUT
+#define TO "T:t:"
+#else
+#define TO
+#endif
+
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+#define MC "m"
+#else
+#define MC
+#endif
+
+#ifdef CONFIG_FEATURE_TFTP_DEBUG
+#define DB "D"
+#else
+#define DB
+#endif
+
+ while ((opt = getopt(argc, argv, BS GET PUT TO MC DB "l:r:")) != -1) {
switch (opt) {
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
case 'b':
- blocksize = atoi(optarg);
- if (!tftp_blocksize_check(blocksize, 0)) {
- return EXIT_FAILURE;
+ option.blksize = atoi(optarg);
+ if (!tftp_blocksize_check(option.blksize, 0)) {
+ return EXIT_FAILURE;
+ }
+ break;
+#endif
+#ifdef CONFIG_FEATURE_TFTP_TIMEOUT
+ case 'T':
+ option.client_timeout = atoi(optarg);
+ if (!tftp_timeout_check(option.client_timeout)) {
+ return EXIT_FAILURE;
+ }
+ break;
+ case 't':
+ option.server_timeout = atoi(optarg);
+ if (!tftp_timeout_check(option.server_timeout)) {
+ return EXIT_FAILURE;
}
break;
#endif
@@ -537,18 +921,34 @@
flags = O_RDONLY;
break;
#endif
+#ifdef CONFIG_FEATURE_TFTP_MULTICAST
+ case 'm':
+ option.multicast = 1; /* receive multicast file */
+ break;
+#endif
+#ifdef CONFIG_FEATURE_TFTP_DEBUG
+ case 'D':
+ debug = 1;
+ break;
+#endif
case 'l':
localfile = bb_xstrdup(optarg);
break;
case 'r':
remotefile = bb_xstrdup(optarg);
break;
+ default:
+ bb_show_usage();
}
}
if ((cmd == 0) || (optind == argc)) {
bb_show_usage();
}
+ if (cmd == tftp_cmd_put && option.multicast) {
+ fprintf(stderr, "Multicast (-m) invalid option with put (-p) command\n");
+ exit(EXIT_FAILURE);
+ }
if(localfile && strcmp(localfile, "-") == 0) {
fd = fileno((cmd==tftp_cmd_get)? stdout : stdin);
}
@@ -566,14 +966,12 @@
host = xgethostbyname(argv[optind]);
port = bb_lookup_port(argv[optind + 1], "udp", 69);
-#ifdef CONFIG_FEATURE_TFTP_DEBUG
- fprintf(stderr, "using server \"%s\", remotefile \"%s\", "
+ dprintf("using server \"%s\", remotefile \"%s\", "
"localfile \"%s\".\n",
inet_ntoa(*((struct in_addr *) host->h_addr)),
remotefile, localfile);
-#endif
- result = tftp(cmd, host, remotefile, fd, port, blocksize);
+ result = tftp(cmd, host, remotefile, fd, port, &option);
#ifdef CONFIG_FEATURE_CLEAN_UP
if (!(fd == STDOUT_FILENO || fd == STDIN_FILENO)) {
@@ -582,3 +980,18 @@
#endif
return(result);
}
+
+
+#ifdef CONFIG_FEATURE_TFTP_DEBUG
+
+#include <sys/time.h>
+
+static void
+printtime(void)
+{
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ printf("%11lu.%06lu ", tv.tv_sec, tv.tv_usec);
+}
+
+#endif
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