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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#define DEBUG 0 /* Attention il y des pb si le msg envoye contient des % */
#define PACKET_SIZE 1024
void appli(char *f);
int writen(int fd, char *ptr, int n);
int readn(int fd, char *ptr, int n);
int to_server_socket = -1;
char server_name[] = "smtp.gmail.com"; /* nom du host du serveur */
int port = 25;
char helo[] = "helo plus.bas\n";
char from[] = "mail from: <fatma.sarhan@gmail.com>\n";
char to[] = "rcpt to: <nejiba.taher@gmail.com>\n";
char subject[] = "Subject: transfert ";
int main (int argc, char *argv[])
{
struct sockaddr_in serverSockAddr; /* addresse de la socket */
struct hostent *serverHostEnt; /* description du host serveur */
unsigned long hostAddr; /* addr du serveur */
char *filename;
if ( argc == 2 ) filename = argv[1];
else filename = NULL; /* use stdin */
bzero(&serverSockAddr,sizeof(serverSockAddr));
/* converti l'adresse ip 9.100.1.1 en entier long */
hostAddr = inet_addr(server_name);
if ( (long)hostAddr != (long)-1)
bcopy(&hostAddr,&serverSockAddr.sin_addr,sizeof(hostAddr));
else /* si on a donne un nom */
{
serverHostEnt = gethostbyname(server_name);
if (serverHostEnt == NULL)
{
printf("probleme gethost\n");
exit(0);
}
bcopy(serverHostEnt->h_addr,&serverSockAddr.sin_addr,
serverHostEnt->h_length);
}
serverSockAddr.sin_port = htons(port); /* host to network port */
serverSockAddr.sin_family = AF_INET; /* AF_*** : INET=internet */
/* creation de la socket */
if ( (to_server_socket = socket(AF_INET,SOCK_STREAM,0)) < 0)
{
printf("probleme creation socket client\n");
exit(0);
}
/* requete de connexion */
if(connect(to_server_socket,(struct sockaddr *)&serverSockAddr,
sizeof(serverSockAddr))<0)
{
printf("probleme demande de connection\n");
exit(0);
}
appli(filename);
/* fermeture de la connection */
shutdown(to_server_socket,2);
close(to_server_socket);
return 0;
}
void appli (char *filename) {
char buf[PACKET_SIZE+1], *ptr;
FILE *bulk;
int nb;
if (filename == NULL) {
bulk = stdin;
} else {
if ( ( bulk = fopen(filename,"rb")) == NULL ) {
printf ( "can't open file to read\n" );
exit(1);
}
}
buf[0] = 0x00;
readn(to_server_socket,buf,PACKET_SIZE);
printf(buf);
writen(to_server_socket,helo,strlen(helo));
readn(to_server_socket,buf,PACKET_SIZE);
printf(buf);
writen(to_server_socket,from,strlen(from));
readn(to_server_socket,buf,PACKET_SIZE);
printf(buf);
writen(to_server_socket,to,strlen(to));
readn(to_server_socket,buf,PACKET_SIZE);
printf(buf);
writen(to_server_socket,"data\n",6);
readn(to_server_socket,buf,PACKET_SIZE);
printf(buf);
sprintf(buf,"%s %s\n\n", subject,
(( filename == NULL ) ? "STDIN" : filename ) );
writen(to_server_socket,buf,strlen(buf));
/* the file */
while ( !feof(bulk) ) {
bzero(buf, PACKET_SIZE+1);
nb = fread(buf,sizeof(char), PACKET_SIZE, bulk);
buf[nb] = 0x00;
while ( (ptr = strstr(buf,"\r\n.\r\n") ) != NULL ) *(ptr+3) = '.';
writen(to_server_socket,buf,nb);
if (DEBUG) printf(buf);
}
writen(to_server_socket,"\r\n.\r\n",5);
readn(to_server_socket,buf,PACKET_SIZE);
printf(buf);
fclose(bulk);
}
int writen(int fd, char *ptr, int n)
{
int nl, nw;
nl = n;
while ( nl > 0 ) {
nw = write(fd, ptr, nl);
if ( nw <= 0 )
return nw; /*error*/
nl -= nw;
ptr += nw;
}
return (n-nl);
}
int readn(int fd, char *ptr, int n){
int nl, nr;
nl = n;
while ( nl > 0 ) {
nr = read(fd,ptr,nl);
if (nr < 0 )
return nr; /*error*/
else
if ( nr == 0 )
break;
nl -= nr;
ptr += nr;
if ( *(ptr-2) == '\r' && *(ptr-1) == '\n' )
break;
}
*ptr = 0x00;
return (n-nl);
} |
