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Data Structures
struct	tftp_msg

Macros
#define	TFTP_ACK 4 /* Acknowledgement */

#define	TFTP_DATA 3 /* Data Packet */

#define	TFTP_ERROR 5 /* Error */

#define	TFTP_ERROR_ACCESS_VIOLATION 2 /* Access violation. */

#define	TFTP_ERROR_DISK_FULL 3 /* Disk full or allocation exceeded. */

#define	TFTP_ERROR_FILE_EXISTS 6 /* File already exists. */

#define	TFTP_ERROR_FILE_NOT_FOUND 1 /* File not found. */

#define	TFTP_ERROR_ILLEGAL_OP 4 /* Illegal TFTP operation. */

#define	TFTP_ERROR_NO_SUCH_USER 7 /* No such user. */

#define	TFTP_ERROR_NOT_DEFINED 0 /* Not defined, see error message (if any). */

#define	TFTP_ERROR_UNKNOWN_TRANSFER_ID 5 /* Unknown transfer ID. */

#define	TFTP_MAXDATA 512 /* Max size of a data packet */

#define	TFTP_MAXNAM 64 /* Max length of a file name */

#define	TFTP_MAXRETRIES 3 /* Number of retranmissions */

#define	TFTP_NON_VERBOSE 0 /* Do not use verbose output */

#define	TFTP_PORT 69 /* UDP Port for TFTP */

#define	TFTP_RRQ 1 /* Read Request */

#define	TFTP_VERBOSE 1 /* Use verbose output */

#define	TFTP_WAIT 5000 /* Time to wait for reply (ms) */

#define	TFTP_WRQ 2 /* Write Request */

Functions
status	tftpget (uint32 serverip, const char filename, char rcv_buf, uint32 rcv_buf_size, byte verbose)

status	tftpget_mb (uint32 serverip, const char filename, char rcv_bufs, uint32 rcv_buf_sizes, uint32 rcv_buf_count, byte verbose)

Macro Definition Documentation

◆ TFTP_ACK

#define TFTP_ACK 4 /* Acknowledgement */

Definition at line 7 of file tftp.h.

Referenced by tftpget_mb().

◆ TFTP_DATA

#define TFTP_DATA 3 /* Data Packet */

Definition at line 6 of file tftp.h.

Referenced by tftp_send1().

◆ TFTP_ERROR

#define TFTP_ERROR 5 /* Error */

Definition at line 8 of file tftp.h.

Referenced by tftp_send1().

◆ TFTP_ERROR_ACCESS_VIOLATION

#define TFTP_ERROR_ACCESS_VIOLATION 2 /* Access violation. */

Definition at line 13 of file tftp.h.

◆ TFTP_ERROR_DISK_FULL

#define TFTP_ERROR_DISK_FULL 3 /* Disk full or allocation exceeded. */

Definition at line 14 of file tftp.h.

◆ TFTP_ERROR_FILE_EXISTS

#define TFTP_ERROR_FILE_EXISTS 6 /* File already exists. */

Definition at line 17 of file tftp.h.

◆ TFTP_ERROR_FILE_NOT_FOUND

#define TFTP_ERROR_FILE_NOT_FOUND 1 /* File not found. */

Definition at line 12 of file tftp.h.

◆ TFTP_ERROR_ILLEGAL_OP

#define TFTP_ERROR_ILLEGAL_OP 4 /* Illegal TFTP operation. */

Definition at line 15 of file tftp.h.

◆ TFTP_ERROR_NO_SUCH_USER

#define TFTP_ERROR_NO_SUCH_USER 7 /* No such user. */

Definition at line 18 of file tftp.h.

◆ TFTP_ERROR_NOT_DEFINED

#define TFTP_ERROR_NOT_DEFINED 0 /* Not defined, see error message (if any). */

Definition at line 11 of file tftp.h.

◆ TFTP_ERROR_UNKNOWN_TRANSFER_ID

#define TFTP_ERROR_UNKNOWN_TRANSFER_ID 5 /* Unknown transfer ID. */

Definition at line 16 of file tftp.h.

◆ TFTP_MAXDATA

#define TFTP_MAXDATA 512 /* Max size of a data packet */

Definition at line 22 of file tftp.h.

◆ TFTP_MAXNAM

#define TFTP_MAXNAM 64 /* Max length of a file name */

Definition at line 21 of file tftp.h.

Referenced by tftpget_mb().

◆ TFTP_MAXRETRIES

#define TFTP_MAXRETRIES 3 /* Number of retranmissions */

Definition at line 23 of file tftp.h.

Referenced by tftpget_mb().

◆ TFTP_NON_VERBOSE

#define TFTP_NON_VERBOSE 0 /* Do not use verbose output */

Definition at line 27 of file tftp.h.

◆ TFTP_PORT

#define TFTP_PORT 69 /* UDP Port for TFTP */

Definition at line 20 of file tftp.h.

Referenced by tftpget_mb().

◆ TFTP_RRQ

#define TFTP_RRQ 1 /* Read Request */

Definition at line 4 of file tftp.h.

Referenced by tftpget_mb().

◆ TFTP_VERBOSE

#define TFTP_VERBOSE 1 /* Use verbose output */

Definition at line 28 of file tftp.h.

Referenced by tftpget_mb().

◆ TFTP_WAIT

#define TFTP_WAIT 5000 /* Time to wait for reply (ms) */

Definition at line 24 of file tftp.h.

Referenced by tftp_send1().

◆ TFTP_WRQ

#define TFTP_WRQ 2 /* Write Request */

Definition at line 5 of file tftp.h.

Function Documentation

◆ tftpget()

status tftpget	(	uint32	serverip,
		const char *	filename,
		char *	rcv_buf,
		uint32	rcv_buf_size,
		byte	verbose
	)

Definition at line 100 of file tftp.c.

References tftpget_mb().

 {
     return tftpget_mb(serverip, filename, &rcv_buf, &rcv_buf_size, 1,
                                  verbose);
 }

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◆ tftpget_mb()

status tftpget_mb	(	uint32	serverip,
		const char *	filename,
		char **	rcv_bufs,
		uint32 *	rcv_buf_sizes,
		uint32	rcv_buf_count,
		byte	verbose
	)

Definition at line 118 of file tftp.c.

References getport(), htons, kprintf(), memset(), NULL, NULLCH, strncpy(), strnlen(), SYSERR, tftp_msg::tf_data, tftp_msg::tf_dblk, tftp_msg::tf_opcode, TFTP_ACK, TFTP_MAXNAM, TFTP_MAXRETRIES, TFTP_PORT, TFTP_RRQ, tftp_send1(), TFTP_VERBOSE, TIMEOUT, udp_register(), udp_release(), and udp_sendto().

Referenced by tftpget().

 {
     int32   nlen;           /* Length of file name      */
     uint16  localport;      /* Local UDP port to use    */
     uint16  remport=TFTP_PORT;  /* Remote UDP port to use   */
     int32   sock;           /* Socket descriptor to use */
     uint16  expected = 1;       /* Next data block we expect    */
     int32   i;          /* Loop index           */
     int32   n;          /* Num,h. octets in incoming msg*/
     int32   ret;            /* Return value         */
     int32   filesiz;        /* Total size of downloaded file*/
     struct  tftp_msg outmsg;    /* Outgoing message     */
     int32   mlen;           /* Length of outgoing mesage    */
     struct  tftp_msg inmsg;     /* Buffer for response message  */
     int32   dlen;           /* Size of data in a response   */
     char*   curr_buf;       /* Current buffer being used    */
     uint32  curr_buf_ind;       /* Index of current buffer  */
     uint32  curr_used;      /* Amount used in buffer    */
 
     /* Check args */
     
     if(filename == NULL || serverip == 0 || rcv_bufs == NULL ||
         rcv_buf_sizes == NULL || rcv_buf_count == 0) {
         kprintf("[TFTP GET] ERROR: Invalid argument\n");
         return SYSERR;
     }
     for(i = 0; i < rcv_buf_count; i++) {
         if(rcv_bufs[i] == NULL || rcv_buf_sizes[i] == 0) {
             kprintf("[TFTP GET] ERROR: Invalid argument\n");
             return SYSERR;
         }
     }
 
     nlen = strnlen(filename, TFTP_MAXNAM+1);
     if ( (nlen <= 0) || (nlen > TFTP_MAXNAM) ) {
         return SYSERR;
     }
     
     if(verbose & TFTP_VERBOSE) {
         kprintf("[TFTP Get] Server: %08X File: %s\n",
                          serverip, filename);
     }
 
     /* Generate a local port */
 
     localport = getport();
 
     if (verbose & TFTP_VERBOSE) {
         kprintf("[TFTP Get] Using local port %u\n",
                         0xffff & localport);
     }
         
     /* Register a UDP socket */
 
     sock = udp_register(serverip, 0, localport);
     if (sock == SYSERR) {
         kprintf("[TFTP Get] ERROR: udp_register failed\n");
         return SYSERR;
     }
 
     /* Clear the message buffer */
 
     memset((char*)&outmsg, NULLCH, sizeof(outmsg));
 
     /* Initialize the total file size to zero */
 
     filesiz = 0;
     curr_buf_ind = 0;
     curr_buf = (char*)rcv_bufs[curr_buf_ind];
     curr_used = 0;
 
     /* Form the first message and compute length (a Read Request)   */
 
     outmsg.tf_opcode = htons(TFTP_RRQ);
     strncpy(outmsg.tf_filemode, filename, nlen+1);
     /* Set mode to 'octet' */
     strncpy(outmsg.tf_filemode+nlen+1, "octet", sizeof("octet")+1);
 
     /* Length is 2 opcode octets, name length, "octet" length,  */
     /*      and two NULLs                   */
 
     mlen = nlen + strnlen("octet", 6) + 4;
 
     /* Repeatedly send the next request and get a response,     */
     /*  retransmitting a request up to TFTP_MAXRETRIES times    */
 
     while(1) {
         for (i=0; i < TFTP_MAXRETRIES; i++) {
         n = tftp_send1(sock, serverip, &remport, &outmsg, mlen,
                             &inmsg, expected);
         if (n > 0) {
             break;
         } else if (n == SYSERR) {
             kprintf("\n[TFTP Get] ERROR: TFTP Send fails\n");
             udp_release(sock);
             return SYSERR;
         } else if (n == TIMEOUT) {
             continue;
 
         }
         }
         if (i >= TFTP_MAXRETRIES) {
         kprintf("\n[TFTP Get] ERROR: Max retries %d exceeded\n",
                             TFTP_MAXRETRIES);
         udp_release(sock);
         return SYSERR;
         }
         
         if(verbose & TFTP_VERBOSE) {
         kprintf(".");
         }
 
         /* Compute size of data in the message */
 
         dlen = n - sizeof(inmsg.tf_opcode) - sizeof(inmsg.tf_dblk);
 
         /* Move the contents of this block into the file buffer */
 
         for (i=0; i<dlen; i++) {
         if (curr_used >= rcv_buf_sizes[curr_buf_ind]) {
             curr_buf_ind++;
             if(curr_buf_ind >= rcv_buf_count) {
                 udp_release(sock);
                 if(verbose & TFTP_VERBOSE) {
                     kprintf("\n");
                 }
                 return filesiz;
             }
             curr_buf = (char*)rcv_bufs[curr_buf_ind];
             curr_used = 0;
         }
         *curr_buf++ = inmsg.tf_data[i];
         curr_used++;
         filesiz++;
         }
 
         /* Form an ACK */
 
         outmsg.tf_opcode = htons(TFTP_ACK);
         outmsg.tf_ablk = htons(expected);
         mlen = sizeof(outmsg.tf_opcode) + sizeof(outmsg.tf_ablk);
 
         /* If this was the last packet, send final ACK */
 
         if (dlen < 512) {
         ret = udp_sendto(sock, serverip, remport,
                     (char *) &outmsg, mlen);
         udp_release(sock);
             
         if(verbose & TFTP_VERBOSE) {
             kprintf("\n");
         }
             
         if (ret == SYSERR) {
             kprintf("\n[TFTP GET] Error on final ack\n");
             return SYSERR;
         }
         return filesiz;
         }
 
         /* Move to next block and continue */
 
         expected++;
     }
 }

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Data Structures

Macros

Functions

Macro Definition Documentation

◆ TFTP_ACK

◆ TFTP_DATA

◆ TFTP_ERROR

◆ TFTP_ERROR_ACCESS_VIOLATION

◆ TFTP_ERROR_DISK_FULL

◆ TFTP_ERROR_FILE_EXISTS

◆ TFTP_ERROR_FILE_NOT_FOUND

◆ TFTP_ERROR_ILLEGAL_OP

◆ TFTP_ERROR_NO_SUCH_USER

◆ TFTP_ERROR_NOT_DEFINED

◆ TFTP_ERROR_UNKNOWN_TRANSFER_ID

◆ TFTP_MAXDATA

◆ TFTP_MAXNAM

◆ TFTP_MAXRETRIES

◆ TFTP_NON_VERBOSE

◆ TFTP_PORT

◆ TFTP_RRQ

◆ TFTP_VERBOSE

◆ TFTP_WAIT

◆ TFTP_WRQ

Function Documentation

◆ tftpget()

◆ tftpget_mb()