int
open_file(char *method, char *file)
{
char *url;
char **ap, **argv;
int len, i, oerrno;
if ((method == NULL) || (strcmp(method, "file") == 0))
return (open(file, O_RDONLY));
if ((strcmp(method, "http") == 0) ||
strcmp(method, "ftp") == 0) {
asprintf(&url, "%s://%s", method, file);
if (url == NULL)
return (-1);
i = fileget(url);
free(url);
return (i);
} else if (strcmp(method, "exec") == 0) {
len = strlen(file);
argv = calloc(len, sizeof(char *));
if (argv == NULL)
errx(1, "malloc failed");
for (ap = argv; ap < &argv[len - 1] &&
(*ap = strsep(&file, " \t")) != NULL;) {
if (**ap != '\0')
ap++;
}
*ap = NULL;
i = open_child(argv[0], argv);
oerrno = errno;
free(argv);
errno = oerrno;
return (i);
}
errx(1, "Unknown method %s", method);
return (-1); /* NOTREACHED */
}
int server(int portnum, int fd0)
{
int clientfd = 0, n = 0, listenfd = 0;
char *srecvBuff, *crecvBuff;
char ssendBuff[1025], csendBuff[1025];
struct sockaddr_in s_addr, c_addr;
int numrv;
char line[1000];
struct sFileDownload cFileDownload;
struct sFileDownload sFileDownload;
struct sFileUpload cFileUpload;
struct sFileUpload sFileUpload;
memset(&c_addr, '0', sizeof(c_addr));
memset(csendBuff, '0', sizeof(csendBuff));
memset(ssendBuff, '0', sizeof(ssendBuff));
int cmd;
s_addr.sin_family = AF_INET;
s_addr.sin_addr.s_addr = htonl(INADDR_ANY);
s_addr.sin_port = htons(portnum);
listenfd = socket(AF_INET, SOCK_STREAM, 0);
printf("created socket\n");
bind(listenfd,(struct sockaddr *) &s_addr, sizeof(s_addr));
printf("listening on port %d\n", portnum);
if(listen(listenfd, 10) == -1)
{
printf("Failed to listen\n");
return -1;
}
clientfd = accept(listenfd,(struct sockaddr *) NULL, NULL); // accept awaiting request
if(clientfd == -1)
printf
("accept faileindent: Standard input:476: Warning:old style assignment ambiguity in \"=-\". Assuming \"= -\"d\n");
else
printf("accepted connection \n");
while(1)
{
if((n = read(clientfd, &cmd, sizeof(int))) > 0)
{
printf("Recieved %d %d\n", n, cmd);
n = 0;
}
if((CMD) cmd == FileDownload)
{
printf("Got FileDownload command\n");
if((n =read(clientfd,(void *) &sFileDownload,sizeof(sFileDownload))) != sizeof(sFileDownload))
printf("Error reading filename\n");
printf("Sending file %s\n", sFileDownload.filename);
char temp[100];
strcpy(temp, "./shared/");
strcat(temp, sFileDownload.filename);
char *fname = temp;
FILE *fs = fopen(fname, "r");
if(fs == NULL)
{
printf("Unable to open file.\n");
return 0;
}
int block;
char *readbuf;
struct stat vstat;
// get size of file
if(stat(temp, &vstat) == -1)
{
printf("vstat error\n");
return 0;
}
// send file size first
int size = vstat.st_size;
readbuf =(char *) malloc(size * sizeof(char));
if(readbuf == NULL)
{
printf("error, No memory\n");
exit(0);
}
if(send(clientfd, &size, sizeof(int), 0) < 0)
{
printf("send error\n");
return 0;
}
else
printf("sending file size %d\n", size);
while((block = fread(readbuf, sizeof(char), size, fs)) > 0)
{
if(send(clientfd, readbuf, block, 0) < 0)
{
printf("send error\n");
return 0;
}
printf("File Sent\n");
}
fclose(fs);
}
else if((CMD) cmd == FileUpload)
{
char temp[100];
printf("Got FileUpload command\n");
if((n = read(clientfd,(void *) &sFileUpload,sizeof(sFileUpload))) != sizeof(sFileUpload))
printf("Error reading filename\n");
printf("File name: %s\n", sFileUpload.filename);
int size;
int fr_block_sz = 0;
if((fr_block_sz =
recv(clientfd, &size, sizeof(int), 0)) != sizeof(int))
{
printf("Error reading size of file %s\n", temp);
return 0;
}
else
printf("File size: %dB\n", size);
char result[100];
printf("FileUploadDeny or FileUploadAllow?\n");
read(fd0, result, sizeof("FileUploadAllow"));
if(strcmp(result, "FileUploadDeny") == 0)
{
if((n = write(clientfd, &result, sizeof(result))) == -1)
printf("Failed to send result %s\n", result);
else
printf("Result sent: %d %s\n", n, result);
continue;
}
else
{
printf("Accepted file\n");
write(clientfd, &result, sizeof(result));
}
strcpy(temp, "./shared/");
strcat(temp, sFileUpload.filename);
FILE *fr = fopen(temp, "w+");
if(fr == NULL)
{
printf("Error creating file %s\n", temp);
return 0;
}
else
printf("created file %s\n", temp);
srecvBuff =(char *) malloc(size * sizeof(char));
int recvdsize = 0;
while((fr_block_sz = recv(clientfd, srecvBuff, LENGTH, 0)) > 0)
{
srecvBuff[fr_block_sz] = 0;
int write_sz =
fwrite(srecvBuff, sizeof(char), fr_block_sz, fr);
srecvBuff += fr_block_sz;
if(write_sz == -1)
{
printf("Error writing to file %s\n", temp);
return 0;
}
else
printf("wrote to file %s %d bytes\n", temp, write_sz);
recvdsize += fr_block_sz;
if(recvdsize >= size)
break;
}
printf("Done Upload!\n");
fclose(fr);
}
if((CMD) cmd == FileHash)
{
MD5_CTX md5Context;
char sign[16];
int num_responses;
char temp[100];
printf("Got FileHash command\n");
if((n =read(clientfd,(void *) &sFileHash,sizeof(sFileHash))) != sizeof(sFileHash))
printf("Error reading cFileHash\n");
else
printf("Type:%s\n", sFileHash.type);
if(strcmp(sFileHash.type, "Verify") == 0)
{
printf("Got Verify\n");
num_responses = 1;
if(send(clientfd, &num_responses, sizeof(int), 0) < 0)
{
printf("send error\n");
return 0;
}
else
printf("sent number of responses %d\n", num_responses);
printf("ALL DONE\n");
getFileHash();
if(send(clientfd, &sFileHash_response, sizeof(sFileHash_response),0) < 0)
{
printf("send error\n");
return 0;
}
else
printf("sent sFileHash_response %s\n",
sFileHash_response.filename);
}
else if(strcmp(sFileHash.type, "CheckAll") == 0)
{
DIR *fd;
int i;
printf("Got CheckAll\n");
strcpy(temp, "./shared/");
fd = opendir(temp);
if(NULL == fd)
{
printf("Error opening directory %s\n", temp);
return 0;
}
num_responses = GetFileCnt();
printf("Found %d files in shared folder\n", num_responses);
if(send(clientfd, &num_responses, sizeof(num_responses), 0) < 0)
{
printf("send error\n");
return 0;
}
else
printf("sent number of responses %d\n", num_responses);
fd = opendir(temp);
for(i = 0; i < num_responses; i++)
{
strcpy(sFileHash.filename, GetNxtFile(fd));
getFileHash();
if(send(clientfd, &sFileHash_response,sizeof(sFileHash_response), 0) < 0)
{
printf("send error\n");
return 0;
}
else
printf("sent sFileHash_response %s\n",sFileHash_response.filename);
}
closedir(fd);
}
else
{
printf("RReceived invalid FileHash Command %s\n",
sFileHash.type);
return 0;
}
}
else if((CMD) cmd == IndexGet)
{
char filelist[1000];
strcpy(filelist, "");
fileget(filelist, clientfd);
printf("File List Sent\n");
}
if(n < 0)
printf("\n Read Error \n");
}
close(clientfd);
return 0;
}
