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Add REST command

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This commit is contained in:
Michael Theall 2016-01-18 17:46:03 -06:00
parent 5617e2c32a
commit de29f4a2a7
2 changed files with 50 additions and 17 deletions
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2
README.md
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@ -38,6 +38,7 @@ Supported Commands
- PORT
- PWD
- QUIT
- REST
- RETR
- RMD
- RNFR
@ -56,5 +57,4 @@ Planned Commands
----------------
- ALLO
- REST
- STOU

63
source/ftp.c
View File

@ -395,6 +395,7 @@ ftp_session_close_file(ftp_session_t *session)
}
session->fp = NULL;
session->filepos = 0;
}
/*! open file for reading for ftp session
@ -434,9 +435,15 @@ ftp_session_open_file_read(ftp_session_t *session)
}
session->filesize = st.st_size;
/* reset file position */
/* TODO: support REST command */
session->filepos = 0;
if(session->filepos != 0)
{
rc = fseek(session->fp, session->filepos, SEEK_SET);
if(rc != 0)
{
console_print(RED "fseek '%s': %d %s\n" RESET, session->buffer, errno, strerror(errno));
return -1;
}
}
return 0;
}
@ -484,8 +491,10 @@ ftp_session_open_file_write(ftp_session_t *session,
if(append)
mode = "ab";
else if(session->filepos != 0)
mode = "r+b";
/* open file in write and create mode with truncation */
/* open file in write mode */
session->fp = fopen(session->buffer, mode);
if(session->fp == NULL)
{
@ -501,9 +510,15 @@ ftp_session_open_file_write(ftp_session_t *session,
console_print(RED "setvbuf: %d %s\n" RESET, errno, strerror(errno));
}
/* reset file position */
/* TODO: support REST command */
session->filepos = 0;
if(session->filepos != 0 && !append)
{
rc = fseek(session->fp, session->filepos, SEEK_SET);
if(rc != 0)
{
console_print(RED "fseek '%s': %d %s\n" RESET, session->buffer, errno, strerror(errno));
return -1;
}
}
return 0;
}
@ -731,7 +746,7 @@ ftp_session_new(int listen_fd)
host, serv);
/* allocate a new session */
session = (ftp_session_t*)malloc(sizeof(ftp_session_t));
session = (ftp_session_t*)calloc(1, sizeof(ftp_session_t));
if(session == NULL)
{
console_print(RED "failed to allocate session\n" RESET);
@ -740,17 +755,12 @@ ftp_session_new(int listen_fd)
}
/* initialize session */
memset(session->cwd, 0, sizeof(session->cwd));
strcpy(session->cwd, "/");
session->peer_addr.sin_addr.s_addr = INADDR_ANY;
session->cmd_fd = new_fd;
session->pasv_fd = -1;
session->data_fd = -1;
session->flags = 0;
session->state = COMMAND_STATE;
session->next = NULL;
session->prev = NULL;
session->transfer = NULL;
/* link to the sessions list */
if(sessions == NULL)
@ -2115,12 +2125,35 @@ FTP_DECLARE(QUIT)
FTP_DECLARE(REST)
{
/* TODO */
const char *p;
uint64_t pos = 0;
console_print(CYAN "%s %s\n" RESET, __func__, args ? args : "");
ftp_session_set_state(session, COMMAND_STATE, 0);
return ftp_send_response(session, 502, "unavailable\r\n");
if(args == NULL)
return ftp_send_response(session, 504, "invalid argument\r\n");
for(p = args; *p; ++p)
{
if(!isdigit((int)*p))
return ftp_send_response(session, 504, "invalid argument\r\n");
if(UINT64_MAX / 10 < pos)
return ftp_send_response(session, 504, "invalid argument\r\n");
pos *= 10;
if(UINT64_MAX - (*p - '0') < pos)
return ftp_send_response(session, 504, "invalid argument\r\n");
pos += (*p - '0');
}
session->filepos = pos;
return ftp_send_response(session, 200, "OK\r\n");
}
FTP_DECLARE(RETR)