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/* $Id: news.c 5 2024-09-11 00:26:25Z nishi $ */
#define OK_NEWS_SRC
#include "ok_news.h"
#include "ok_util.h"
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#ifdef __FreeBSD__
#include <netinet/in.h>
#endif
extern char* nntpserver;
extern char* nntpuser;
extern char* nntppass;
extern char* nntppath;
extern char* nntpfrom;
extern char* nntpgroup;
extern char* nntpcount;
extern int nntpport;
struct news_entry news_entry;
void ok_close(int sock);
void ok_news_init(void){
news_entry.from = NULL;
news_entry.content = NULL;
}
int ok_news_read(const char* path){
if(news_entry.from != NULL){
free(news_entry.from);
news_entry.from = NULL;
}
if(news_entry.content != NULL){
free(news_entry.content);
news_entry.content = NULL;
}
struct stat s;
if(stat(path, &s) == 0){
char* boundary = NULL;
char* buffer = malloc(s.st_size + 1);
buffer[s.st_size] = 0;
FILE* f = fopen(path, "r");
fread(buffer, s.st_size, 1, f);
uint64_t i;
bool newline = false;
int incr = 0;
char* l = malloc(1);
l[0] = 0;
bool header = true;
bool ignore = false;
bool bheader = false;
for(i = 0; i < s.st_size; i++){
if(buffer[i] == '\r'){
if(buffer[i + 1] == '\n'){
/* newline */
i++;
if(!header){
char* line = malloc(i - 1 - incr + 1);
line[i - 1 - incr] = 0;
memcpy(line, buffer + incr, i - 1 - incr);
if(strcmp(line, ".") == 0){
free(line);
break;
}else{
char* ln = line;
if(line[0] == '.'){
ln++;
}
if(news_entry.content == NULL){
news_entry.content = malloc(1);
news_entry.content[0] = 0;
}
if(boundary != NULL && strcmp(ln, boundary) == 0){
bheader = true;
ignore = true;
}else if(boundary != NULL && bheader && strlen(ln) == 0){
bheader = false;
free(line);
incr = i + 1;
newline = true;
continue;
}else if(boundary != NULL && bheader){
int j;
for(j = 0; j < strlen(ln); j++){
if(ln[j] == ':'){
ln[j] = 0;
if(strcasecmp(ln, "Content-Type") == 0){
ignore = false;
j++;
for(; ln[j] != 0 && (ln[j] == ' ' || ln[j] == '\t'); j++);
if(ln[j] != 0){
char* v = ln + j;
int k;
for(k = 0; v[k] != 0; k++){
if(v[k] == ';'){
v[k] = 0;
break;
}
}
if(strcasecmp(v, "text/plain") == 0){
}else{
ignore = true;
}
}
}
break;
}
}
}
if(!ignore && !bheader){
char* tmp = news_entry.content;
news_entry.content = ok_strcat3(tmp, ln, "\n");
free(tmp);
}
}
free(line);
}else if(newline){
header = false;
}else{
char* line = malloc(i - 1 - incr + 1);
line[i - 1 - incr] = 0;
memcpy(line, buffer + incr, i - 1 - incr);
char* last = ok_strdup(l);
char* tmp = l;
l = ok_strcat(tmp, line);
free(tmp);
bool al = false;
if(('a' <= line[0] && line[0] <= 'z') || ('A' <= line[0] && line[0] <= 'Z')){
free(l);
l = ok_strdup(line);
al = true;
}
if(al){
char* ln = ok_strdup(l);
int j;
for(j = 0; ln[j] != 0; j++){
if(ln[j] == ':'){
char* key = ln;
char* value = "";
ln[j] = 0;
j++;
for(; ln[j] != 0 && (ln[j] == '\t' || ln[j] == ' '); j++);
if(ln[j] != 0) value = ln + j;
if(strcasecmp(key, "From") == 0){
if(news_entry.from != NULL) free(news_entry.from);
news_entry.from = ok_strdup(value);
}else if(strcasecmp(key, "Content-Type") == 0){
int k = 0;
int incr2 = 0;
for(k = 0; k <= strlen(value); k++){
if(value[k] == ';' || value[k] == 0){
char* attr = malloc(k - incr2 + 1);
attr[k - incr2] = 0;
memcpy(attr, value + incr2, k - incr2);
int in;
for(in = 0; attr[in] != 0; in++){
if(attr[in] == '='){
attr[in] = 0;
if(strcasecmp(attr, "boundary") == 0){
boundary = ok_strcat("--", attr + in + 1 + 1);
boundary[strlen(attr + in + 1 + 1) - 1 + 2] = 0;
ignore = true;
}
break;
}
}
free(attr);
k++;
for(; value[k] != 0 && (value[k] == ' ' || value[k] == '\t'); k++);
incr2 = k;
}
}
}
}
}
free(ln);
}
free(last);
free(line);
}
incr = i + 1;
newline = true;
}else{
newline = false;
}
}else{
newline = false;
}
}
free(l);
free(buffer);
if(boundary != NULL) free(boundary);
return 0;
}else{
return 1;
}
}
int ok_news_parse(int sock){
char c;
int sta = 0;
bool st = false;
while(1){
if(recv(sock, &c, 1, 0) <= 0){
return -1;
}
if(c == '\n') break;
if(!st){
if('0' <= c && c <= '9'){
sta *= 10;
sta += c - '0';
}else if(c == ' '){
st = true;
}
}
}
return sta == 0 ? -1 : sta;
}
int ok_news_write(const char* nick, const char* message){
int nt_sock;
struct sockaddr_in nt_addr;
if((nt_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0){
fprintf(stderr, "Socket creation failure\n");
return 1;
}
bzero((char*)&nt_addr, sizeof(nt_addr));
nt_addr.sin_family = PF_INET;
nt_addr.sin_addr.s_addr = inet_addr(nntpserver);
nt_addr.sin_port = htons(nntpport);
int yes = 1;
if(setsockopt(nt_sock, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes)) < 0) {
fprintf(stderr, "setsockopt failure");
ok_close(nt_sock);
return 1;
}
if(connect(nt_sock, (struct sockaddr*)&nt_addr, sizeof(nt_addr)) < 0){
fprintf(stderr, "Connection failure\n");
ok_close(nt_sock);
return 1;
}
int sta;
sta = ok_news_parse(nt_sock);
if(sta == 200 || sta == 201){
char construct[1024];
if(nntpuser != NULL){
sprintf(construct, "AUTHINFO USER %s\r\n", nntpuser);
send(nt_sock, construct, strlen(construct), 0);
sta = ok_news_parse(nt_sock);
if(sta != 381){
goto cleanup;
}
}
if(nntppass != NULL){
sprintf(construct, "AUTHINFO PASS %s\r\n", nntppass);
send(nt_sock, construct, strlen(construct), 0);
if(sta != 281){
goto cleanup;
}
}
send(nt_sock, "MODE READER\r\n", 4 + 1 + 6 + 2, 0);
sta = ok_news_parse(nt_sock);
if(sta == 200 || sta == 201){
send(nt_sock, "POST\r\n", 4 + 2, 0);
sta = ok_news_parse(nt_sock);
if(sta == 340){
sprintf(construct, "From: %s\r\n", nntpfrom);
send(nt_sock, construct, strlen(construct), 0);
sprintf(construct, "Newsgroups: %s\r\n", nntpgroup);
send(nt_sock, construct, strlen(construct), 0);
sprintf(construct, "Subject: Message from %s\r\n", nick);
send(nt_sock, construct, strlen(construct), 0);
send(nt_sock, "\r\n", 2, 0);
char c;
int i;
bool first = true;
for(i = 0; message[i] != 0; i++){
if(message[i] == '\n'){
send(nt_sock, "\r\n", 2, 0);
first = true;
}else{
if(first && message[i] == '.'){
send(nt_sock, message + i, 1, 0);
}
send(nt_sock, message + i, 1, 0);
first = false;
}
}
if(!first) send(nt_sock, "\r\n", 2, 0);
send(nt_sock, ".\r\n", 3, 0);
sta = ok_news_parse(nt_sock);
if(sta != 240) goto cleanup;
}else{
goto cleanup;
}
}else{
goto cleanup;
}
}else{
goto cleanup;
}
ok_close(nt_sock);
return 0;
cleanup:
ok_close(nt_sock);
return 1;
}