56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
#include "ft_p.h"
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int serv_do_get(int sock)
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{
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char fname[MAXLINE];
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int req;
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int rep;
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int fd;
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struct stat stat;
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char *file;
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int num_blks;
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int num_last_blk;
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int i;
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DG("%i file requested", REQUEST_FILE);
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ft_bzero(&fname, MAXLINE);
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rep = htons(FILENAME_OK);
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file = NULL;
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if (read(sock, fname, MAXLINE) < 0)
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rep = htons(ERR_READ);
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else if ((fd = open(fname, O_RDONLY)) < 0)
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rep = htons(NO_SUCH_FILE);
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else if ((fstat(fd, &stat)) < 0)
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rep = htons(ERR_STAT);
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else if ((file = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0))
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== MAP_FAILED)
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rep = htons(ERR_MMAP);
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write(sock, (char*)&rep, sizeof(rep));
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if (ntohs(rep) != FILENAME_OK)
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return (1);
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if (read(sock, (char*)&req, sizeof(req)) < 0)
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rep = htons(ERR_READ);
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DG("start transfer command, %d, received", ntohs(req));
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num_blks = htons(stat.st_size / MAXSIZE + 1);
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num_last_blk = htons(stat.st_size % MAXSIZE);
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DG("telling client file has [%i] blocks", ntohs(num_blks));
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if (net_send(sock, (char*)&num_blks, sizeof(num_blks)))
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DG("ACK not received on num_blks");
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DG("telling client last block has [%i] bytes", ntohs(num_last_blk));
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if (net_send(sock, (char*)&num_last_blk, sizeof(num_blks)))
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DG("ACK not received on size of last block");
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num_blks = ntohs(num_blks);
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num_last_blk = ntohs(num_last_blk);
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i = -1;
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while (++i < num_blks - 1)
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net_send(sock, file + i * MAXSIZE, MAXSIZE);
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if (num_last_blk)
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net_send(sock, file + i * MAXSIZE, MAXSIZE);
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if (file && munmap(file, stat.st_size) < 0)
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rep = htons(ERR_MMAP);
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return (0);
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}
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