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#include <unistd.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include "talk.h"
#include "util.h"
char *hostip;
int port = 231;
char *username = "(null)";
char *password = "(null)";
char *recipient = "(null)";
packettype mode = MSG;
static int initsocket(struct sockaddr_in address, socklen_t len){
int s;
if ((s = socket(AF_INET, SOCK_STREAM, 0)) == -1){
perror("socket");
return -1;
}
if ((connect(s, (struct sockaddr *)&address, len)) != 0) {
perror("connect");
return -1;
}
return s;
}
static void processargs(int argc, char **argv){
// -h specify the host of the server
// -P specify the port // default 231
// -u specify the username
// -p specify the password
// -r specify the recipient
// -g get mode
// -R register mode
for (int i = 1; i < argc; i++){
if (strcmp(argv[i], "-h") == 0){
i++;
hostip = argv[i];
} else if (strcmp(argv[i], "-P") == 0){
i++;
port = atoi(argv[i]);
} else if (strcmp(argv[i], "-u") == 0){
i++;
username = argv[i];
} else if (strcmp(argv[i], "-p") == 0){
i++;
password = argv[i];
} else if (strcmp(argv[i], "-r") == 0){
i++;
recipient = argv[i];
} else if (strcmp(argv[i], "-g") == 0){
mode = GET;
} else if (strcmp(argv[i], "-R") == 0){
mode = NEWUSER;
}
else {
fprintf(stderr, "unknown option: %s\n", argv[i]);
exit(1);
}
}
if (hostip == NULL) {
fprintf(stderr, "no host given!\n");
exit(1);
}
if (strcmp(username, "(null)") == 0){
fprintf(stderr, "no username given!\n");
exit(1);
}
if (strcmp(password, "(null)") == 0){
fprintf(stderr, "no password given!\n");
exit(1);
}
if (mode == GET && strcmp(recipient, "(null)") == 0){
fprintf(stderr, "recipient is needed when requesting from an individual!\n");
exit(1);
}
if (mode == MSG && strcmp(recipient, "(null)") == 0){
fprintf(stderr, "recipient is needed when sending to an individual!\n");
exit(1);
}
}
int main(int argc, char **argv){
processargs(argc, argv);
struct sockaddr_in address;
address.sin_family = AF_INET;
inet_pton(AF_INET, hostip, &address.sin_addr);
address.sin_port = htons(port);
socklen_t len = sizeof(address);
int s;
if ((s = initsocket(address, len)) < 0) return s;
int size = sizeof(packet);
packet *buf = malloc(size);
strcpy(buf->username, username);
strcpy(buf->password, password);
strcpy(buf->recipient, recipient);
buf->type = mode;
char *tmp;
if (buf->type == MSG){
tmp = readupto(stdin, '\n');
buf->msg = tmp;
buf->msglen=strlen(buf->msg);
send(s, buf, size, 0);
send(s, buf->msg, buf->msglen, 0);
free(tmp);
} else send(s, buf, size, 0);
recv(s, buf, size, 0);
switch (buf->type){
case USERMAKEERROR: fprintf(stderr, "failed to create new user on server!\n"); break;
case UNKNOWNCMD: fprintf(stderr, "unknown cmd!\n"); break;
case PASSAUTHFAIL: fprintf(stderr, "failed to authenticate password!\n"); break;
case NOSUCHUSER: fprintf(stderr, "user not found, either you tried to msg someone who doesn't exist or you don't exist!\n"); break;
case NEVERMSGED: fprintf(stderr, "you have never messaged that user, or have no new messages from them!\n"); break;
case GET:
tmp = calloc(1, buf->msglen);
recv(s, tmp, buf->msglen, 0);
printf("%s", tmp);
free(tmp);
break;
}
close(s);
return 0;
}
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