/* This is only called by the sender. */ static void read_final_goodbye(int f_in, int f_out) { int i; if (protocol_version < 29) i = read_int(f_in); else { while ((i = read_int(f_in)) == the_file_list->count && read_shortint(f_in) == ITEM_IS_NEW) { /* Forward the keep-alive (no-op) to the receiver. */ write_int(f_out, the_file_list->count); write_shortint(f_out, ITEM_IS_NEW); } } if (i != -1) { rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", i, who_am_i()); exit_cleanup(RERR_PROTOCOL); } }
int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, char *buf, int *len_ptr) { int len, iflags = 0; struct file_list *flist; uchar fnamecmp_type = FNAMECMP_FNAME; int ndx; read_loop: while (1) { ndx = read_ndx(f_in); if (ndx >= 0) break; if (ndx == NDX_DONE) return ndx; if (ndx == NDX_DEL_STATS) { read_del_stats(f_in); if (am_sender && am_server) write_del_stats(f_out); continue; } if (!inc_recurse || am_sender) { int last; if (first_flist) last = first_flist->prev->ndx_start + first_flist->prev->used - 1; else last = -1; rprintf(FERROR, "Invalid file index: %d (%d - %d) [%s]\n", ndx, NDX_DONE, last, who_am_i()); exit_cleanup(RERR_PROTOCOL); } if (ndx == NDX_FLIST_EOF) { flist_eof = 1; if (DEBUG_GTE(FLIST, 3)) rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); write_int(f_out, NDX_FLIST_EOF); continue; } ndx = NDX_FLIST_OFFSET - ndx; if (ndx < 0 || ndx >= dir_flist->used) { ndx = NDX_FLIST_OFFSET - ndx; rprintf(FERROR, "Invalid dir index: %d (%d - %d) [%s]\n", ndx, NDX_FLIST_OFFSET, NDX_FLIST_OFFSET - dir_flist->used + 1, who_am_i()); exit_cleanup(RERR_PROTOCOL); } if (DEBUG_GTE(FLIST, 2)) { rprintf(FINFO, "[%s] receiving flist for dir %d\n", who_am_i(), ndx); } /* Send all the data we read for this flist to the generator. */ start_flist_forward(ndx); flist = recv_file_list(f_in); flist->parent_ndx = ndx; stop_flist_forward(); } iflags = protocol_version >= 29 ? read_shortint(f_in) : ITEM_TRANSFER | ITEM_MISSING_DATA; /* Support the protocol-29 keep-alive style. */ if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) { if (am_sender) maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH); goto read_loop; } flist = flist_for_ndx(ndx, "read_ndx_and_attrs"); if (flist != cur_flist) { cur_flist = flist; if (am_sender) { file_old_total = cur_flist->used; for (flist = first_flist; flist != cur_flist; flist = flist->next) file_old_total += flist->used; } } if (iflags & ITEM_BASIS_TYPE_FOLLOWS) fnamecmp_type = read_byte(f_in); *type_ptr = fnamecmp_type; if (iflags & ITEM_XNAME_FOLLOWS) { if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0) exit_cleanup(RERR_PROTOCOL); } else { *buf = '\0'; len = -1; } *len_ptr = len; if (iflags & ITEM_TRANSFER) { int i = ndx - cur_flist->ndx_start; if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) { rprintf(FERROR, "received request to transfer non-regular file: %d [%s]\n", ndx, who_am_i()); exit_cleanup(RERR_PROTOCOL); } } *iflag_ptr = iflags; return ndx; }
int read_ndx_and_attrs(int f_in, int *iflag_ptr, uchar *type_ptr, char *buf, int *len_ptr) { int len, iflags = 0; struct file_list *flist; uchar fnamecmp_type = FNAMECMP_FNAME; int ndx, save_verbose = verbose; read_loop: while (1) { ndx = read_ndx(f_in); if (ndx >= 0) break; if (ndx == NDX_DONE) return ndx; if (!inc_recurse || am_sender) { int last; if (first_flist) last = first_flist->prev->ndx_start + first_flist->prev->used - 1; else last = -1; rprintf(FERROR, "Invalid file index: %d (%d - %d) [%s]\n", ndx, NDX_DONE, last, who_am_i()); exit_cleanup(RERR_PROTOCOL); } if (ndx == NDX_FLIST_EOF) { flist_eof = 1; send_msg(MSG_FLIST_EOF, "", 0, 0); continue; } ndx = NDX_FLIST_OFFSET - ndx; if (ndx < 0 || ndx >= dir_flist->used) { ndx = NDX_FLIST_OFFSET - ndx; rprintf(FERROR, "Invalid dir index: %d (%d - %d) [%s]\n", ndx, NDX_FLIST_OFFSET, NDX_FLIST_OFFSET - dir_flist->used + 1, who_am_i()); exit_cleanup(RERR_PROTOCOL); } /* Send everything read from f_in to msg_fd_out. */ if (verbose > 3) { rprintf(FINFO, "[%s] receiving flist for dir %d\n", who_am_i(), ndx); } verbose = 0; send_msg_int(MSG_FLIST, ndx); start_flist_forward(f_in); flist = recv_file_list(f_in); flist->parent_ndx = ndx; stop_flist_forward(); verbose = save_verbose; } iflags = protocol_version >= 29 ? read_shortint(f_in) : ITEM_TRANSFER | ITEM_MISSING_DATA; /* Support the protocol-29 keep-alive style. */ if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) { if (am_sender) maybe_send_keepalive(); goto read_loop; } cur_flist = flist_for_ndx(ndx, "read_ndx_and_attrs"); if (iflags & ITEM_BASIS_TYPE_FOLLOWS) fnamecmp_type = read_byte(f_in); *type_ptr = fnamecmp_type; if (iflags & ITEM_XNAME_FOLLOWS) { if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0) exit_cleanup(RERR_PROTOCOL); } else { *buf = '\0'; len = -1; } *len_ptr = len; if (iflags & ITEM_TRANSFER) { int i = ndx - cur_flist->ndx_start; struct file_struct *file = cur_flist->files[i]; if (i < 0 || !(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) { rprintf(FERROR, "received request to transfer non-regular file: %d [%s]\n", ndx, who_am_i()); exit_cleanup(RERR_PROTOCOL); } } *iflag_ptr = iflags; return ndx; }
static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name) { int pid; int status = 0; int error_pipe[2]; /* The receiving side mustn't obey this, or an existing symlink that * points to an identical file won't be replaced by the referent. */ copy_links = 0; if (preserve_hard_links) init_hard_links(); if (fd_pair(error_pipe) < 0) { rsyserr(FERROR, errno, "pipe failed in do_recv"); exit_cleanup(RERR_IPC); } io_flush(NORMAL_FLUSH); if ((pid = do_fork()) == -1) { rsyserr(FERROR, errno, "fork failed in do_recv"); exit_cleanup(RERR_IPC); } if (pid == 0) { close(error_pipe[0]); if (f_in != f_out) close(f_out); /* we can't let two processes write to the socket at one time */ close_multiplexing_out(); /* set place to send errors */ set_msg_fd_out(error_pipe[1]); recv_files(f_in, flist, local_name); io_flush(FULL_FLUSH); handle_stats(f_in); send_msg(MSG_DONE, "", 0); io_flush(FULL_FLUSH); /* Handle any keep-alive packets from the post-processing work * that the generator does. */ if (protocol_version >= 29) { kluge_around_eof = -1; /* This should only get stopped via a USR2 signal. */ while (read_int(f_in) == flist->count && read_shortint(f_in) == ITEM_IS_NEW) {} rprintf(FERROR, "Invalid packet at end of run [%s]\n", who_am_i()); exit_cleanup(RERR_PROTOCOL); } /* Finally, we go to sleep until our parent kills us with a * USR2 signal. We sleep for a short time, as on some OSes * a signal won't interrupt a sleep! */ while (1) msleep(20); } am_generator = 1; close_multiplexing_in(); if (write_batch && !am_server) stop_write_batch(); close(error_pipe[1]); if (f_in != f_out) close(f_in); io_start_buffering_out(); set_msg_fd_in(error_pipe[0]); generate_files(f_out, flist, local_name); handle_stats(-1); io_flush(FULL_FLUSH); if (protocol_version >= 24) { /* send a final goodbye message */ write_int(f_out, -1); } io_flush(FULL_FLUSH); set_msg_fd_in(-1); kill(pid, SIGUSR2); wait_process(pid, &status); return status; }