1 /* tftp.c - TFTP client.
18     -l FILE Local FILE
19     -r FILE Remote FILE
20     -g    Get file
21     -p    Put file
22     -b SIZE Transfer blocks of SIZE octets(8 <= SIZE <= 65464)
41 #define TFTP_DATASIZE    (TFTP_PACKETSIZE-TFTP_DATAHEADERSIZE)
77       ((struct sockaddr_in6 *)server)->sin6_family = AF_INET6;
78       ((struct sockaddr_in6 *)server)->sin6_addr =
79         ((struct sockaddr_in6 *)&TT.inaddr)->sin6_addr;
80       ((struct sockaddr_in6 *)server)->sin6_port = htons(port);
83       ((struct sockaddr_in *)server)->sin_family = AF_INET;
84       ((struct sockaddr_in *)server)->sin_addr.s_addr =
85         ((struct sockaddr_in *)&TT.inaddr)->sin_addr.s_addr;
86       ((struct sockaddr_in *)server)->sin_port = htons(port);
189   return -1;  in check_data()
203   if (tmp == (off_t) -1) {  in mkpkt_data()
205     return -1;  in mkpkt_data()
208   if (nbytesread < 0) return -1;  in mkpkt_data()
219   int packetlen, retry;  in read_ack()  local
221   for (retry = 0; retry < TFTP_RETRIES; retry++) {  in read_ack()
231           *port = ((struct sockaddr_in *)&from)->sin_port;  in read_ack()
232           ((struct sockaddr_in *)server)->sin_port =  in read_ack()
233                   ((struct sockaddr_in *)&from)->sin_port;  in read_ack()
235         if (((struct sockaddr_in *)server)->sin_addr.s_addr !=  in read_ack()
236                 ((struct sockaddr_in *)&from)->sin_addr.s_addr) {  in read_ack()
240         if (*port != ((struct sockaddr_in *)server)->sin_port) {  in read_ack()
263   return -1;  in read_ack()
272   int len, sd, fd, retry, nbytesrecvd = 0, ndatabytes, ret, result = -1;  in file_get()  local
285   if (TT.af == AF_INET6) ((struct sockaddr_in6 *)&server)->sin6_port = 0;  in file_get()
286   else ((struct sockaddr_in *)&server)->sin_port = 0;  in file_get()
290     for (retry = 0 ; retry < TFTP_RETRIES; retry++) {  in file_get()
294                 memcmp(&((struct sockaddr_in *)&server)->sin_addr,  in file_get()
295                 &((struct sockaddr_in *)&from)->sin_addr,  in file_get()
298                 memcmp(&((struct sockaddr_in6 *)&server)->sin6_addr,  in file_get()
299                 &((struct sockaddr_in6 *)&from)->sin6_addr,  in file_get()
302           retry--;  in file_get()
305         if ( ((TT.af == AF_INET) && ((struct sockaddr_in *)&server)->sin_port  in file_get()
306                 && (((struct sockaddr_in *)&server)->sin_port !=  in file_get()
307                 ((struct sockaddr_in *)&from)->sin_port)) ||  in file_get()
308              ((TT.af == AF_INET6) && ((struct sockaddr_in6 *)&server)->sin6_port  in file_get()
309                 && (((struct sockaddr_in6 *)&server)->sin6_port !=  in file_get()
310                 ((struct sockaddr_in6 *)&from)->sin6_port))) {  in file_get()
314           retry--;  in file_get()
330             if (rblockno && (rblockno < 9)) message = arr[rblockno - 1];  in file_get()
347         if ((TT.af == AF_INET6) && !((struct sockaddr_in6 *)&server)->sin6_port)  in file_get()
348           ((struct sockaddr_in6 *)&server)->sin6_port =  in file_get()
349             ((struct sockaddr_in6 *)&from)->sin6_port;  in file_get()
350         else if ((TT.af == AF_INET) && !((struct sockaddr_in *)&server)->sin_port)  in file_get()
351           ((struct sockaddr_in *)&server)->sin_port =  in file_get()
352             ((struct sockaddr_in *)&from)->sin_port;  in file_get()
356     if (retry == TFTP_RETRIES) {  in file_get()
357       error_msg("Retry limit exceeded.");  in file_get()
361     ndatabytes = nbytesrecvd - TFTP_DATAHEADERSIZE;  in file_get()
388   int packetlen, sd, fd, retry = 0, ret, result = -1;  in file_put()  local
399     if (++retry > TFTP_RETRIES) {  in file_put()
400       error_msg("Retry count exceeded.");  in file_put()
416         retry = 0;  in file_put()
420     if (++retry > TFTP_RETRIES) {  in file_put()
421       error_msg("Retry count exceeded.");  in file_put()
450     for (res = info; res; res = res->ai_next)  in tftp_main()
451     if ( (res->ai_family == AF_INET) || (res->ai_family == AF_INET6)) break;  in tftp_main()
455   TT.af = info->ai_family;  in tftp_main()
457   memcpy((void *)&TT.inaddr, info->ai_addr, info->ai_addrlen);  in tftp_main()