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| #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
const char strServerName[] = "smtp.mail.ru";
const char strEhlo[] = "EHLO ip_or_your_domain_name\r\n";
const char strAuthType[] = "AUTH LOGIN\r\n";
const char strLogin[] = "base64_encoded_login\r\n";
const char strPassword[] = "base64_encoded_password\r\n";
const char strMailFrom[] = "MAIL FROM: <sender@mail.ru>\r\n";
const char strRcptTo[] = "RCPT TO: <recipient@yandex.ru>\r\n";
const char strData[] = "DATA\r\n";
const char strMailBody[] = "from: [email]sender@mail.ru[/email]\r\nto: [email]recipient@yandex.ru[/email]\r\nsubject: hendmade mail\r\n\r\nHelo there!\r\n.\r\n";
const char strQuit[] = "QUIT\r\n";
int main(void){
char bufResponse[BUFSIZ + 1];
int n, sockFd;
struct hostent * hPtr;
struct sockaddr_in servAddr;
if ( ( hPtr = gethostbyname(strServerName) ) == NULL ){
fprintf(stderr, "Can't resolve server by name!\n");
exit(1);
}
if ( ( sockFd = socket(AF_INET, SOCK_STREAM, 0) ) < 0 ){
fprintf(stderr, "Can't create socket!\n");
exit(1);
}
memset(&servAddr, 0, sizeof(struct sockaddr_in));
servAddr.sin_family = AF_INET;
servAddr.sin_port = htons(25);
memcpy(&servAddr.sin_addr, *(hPtr->h_addr_list), sizeof(struct in_addr));
if ( connect(sockFd, (struct sockaddr*)&servAddr, sizeof(struct sockaddr_in)) ){
fprintf(stderr, "Can't connect to server!\n");
exit(1);
}
n = strlen(strEhlo);
if ( write(sockFd, strEhlo, n) != n ){
fprintf(stderr, "Error while sending EHLO\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after EHLO: %s\n", bufResponse);
n = strlen(strAuthType);
if ( write(sockFd, strAuthType, n) != n ){
fprintf(stderr, "Error while sending auth type\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after AUTH LOGIN: %s\n", bufResponse);
n = strlen(strLogin);
if ( write(sockFd, strLogin, n) != n ){
fprintf(stderr, "Error while sending login!\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after sending login: %s\n", bufResponse);
n = strlen(strPassword);
if ( write(sockFd, strPassword, n) != n ){
fprintf(stderr, "Error while sending password!\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after sending password: %s\n", bufResponse);
n = strlen(strMailFrom);
if ( write(sockFd, strMailFrom, n) != n ){
fprintf(stderr, "Error while sending sender address!\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after sending mail from: %s\n", bufResponse);
n = strlen(strRcptTo);
if ( write(sockFd, strRcptTo, n) != n ){
fprintf(stderr, "Error while sending reciver address!\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after sending rcpt to: %s\n", bufResponse);
n = strlen(strData);
if ( write(sockFd, strData, n) != n ){
fprintf(stderr, "Error while sending data!\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after sending data to: %s\n", bufResponse);
n = strlen(strMailBody);
if ( write(sockFd, strMailBody, n) != n ){
fprintf(stderr, "Error while sending mail body!\n");
exit(1);
}
if ( ( n = read(sockFd, bufResponse, BUFSIZ) ) < 1 ){
fprintf(stderr, "Error reading response from server!\n");
exit(1);
}
bufResponse[n] = '\0';
fprintf(stderr, "Response after sending mail body to: %s\n", bufResponse);
n = strlen(strQuit);
if ( write(sockFd, strQuit, n) != n ){
fprintf(stderr, "Error while sending quit!\n");
exit(1);
}
if ( close(sockFd) ){
fprintf(stderr, "Can't properly close connection!\n");
exit(1);
}
fprintf(stderr, "Message sent.\n");
exit(0);
} |
(
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Сообщение от aram_gyumri
