commit 0828d8d9f708e72016d48dba85f5b62511961a8c
Author: Mario Rosell R. Martinez <mario@mariorosell.es>
Date: Wed, 18 Mar 2026 19:12:14 +0100
Initial commit
Diffstat:
| A | LICENSE | | | 122 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | README | | | 54 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | anntp.h | | | 143 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | test.c | | | 2 | ++ |
4 files changed, 321 insertions(+), 0 deletions(-)
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,122 @@
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diff --git a/README b/README
@@ -0,0 +1,54 @@
+anntp -- async nntp library in C
+================================
+
+anntp is a public-domain, TLS-capable, asynchronous C implementation for POSIX systems of the Network News Transfer Protocol (NNTP), used by Usenet and other similar networks.
+
+It is a single header with no dependencies by default (unless you enable TLS, then it depends on OpenSSL), and implements full RFC 977 and 3977.
+
+Why
+---
+
+There is no NNTP implementation that works on C, and it is a pretty damn annoying protocol.
+
+Usage
+-----
+
+Importing
+~~~~~~~~~
+
+Anntp is a single-header library. The easiest way is to just add a `3rdpary` directory and inside a submodule with the repo, or just copy the header and update when you want :P.
+
+Note that in exactly ONE C file you must define `ANNTP_IMPLEMENTATION` before including `anntp.h`.
+
+Config
+~~~~~~
+
+Before including `anntp.h`, you can define any of these macros:
+
+* `ANNTP_BUFSIZE`: Buffer size for all operations,
+* `ANNTP_MALLOC`: A memory allocator function (only the name),
+* `ANNTP_FREE`: A memory free procedure (again, only the name),
+* `ANNTP_API`: A type specifier for all API functions.
+* `ANNTP_TLS`: Enable TLS
+
+Usage
+~~~~~
+
+Before anything, call the `anntp_init()` routine.
+
+The entire API is based on the idea of **connections**, a connection abstracts the well, connection (*duh!*) from a client to a server.
+
+A connection is opened with `anntp_mkconn()`, it takes a server URL, and a bool asking weather to enable TLS or not (ignored if TLS is deactivated), and returns a (*heap-allocated*) connection pointer. It must be closed using `anntp_close()`.
+
+Use `anntp_send(connection, cmd)` to send a command, and get the message by using `anntp_read(connection)`, it returns an unsigned char.
+
+TODOs
+-----
+
+* A higher-level API
+
+License
+-------
+
+ughh, pd?
+
diff --git a/anntp.h b/anntp.h
@@ -0,0 +1,143 @@
+/*
+ * See LICENSE file or copyright and license details.
+ */
+
+#ifndef ANNTP_H
+#define ANNTP_H
+
+#include <arpa/inet.h> /* for inet_ntoa */
+#include <netdb.h> /* for gethostbyname */
+#include <netinet/in.h> /* for struct in_addr */
+#include <stddef.h> /* for size_t */
+#include <stdio.h> /* for fprintf, perror, stderr */
+#include <stdlib.h> /* for malloc, free */
+#include <string.h> /* for memset, memcpy, strdup */
+#include <sys/socket.h> /* for socket */
+#include <unistd.h> /* for close */
+
+/*** config ***/
+
+#ifdef _WIN32
+# error This project uses the Anntp library, which is not compatible with Windows, sorry :(
+#endif
+
+#ifndef ANNTP_MALLOC
+# define ANNTP_MALLOC malloc
+#endif
+
+#ifndef ANNTP_FREE
+# define ANNTP_FREE free
+#endif
+
+#ifndef ANNTP_BUFSIZE
+# define ANNTP_BUFSIZE 0x1000
+#endif
+
+#ifndef ANNTP_API
+# define ANNTP_API extern
+#endif
+
+/*** defs ***/
+
+#define Bool int
+#define true 1
+#define false 0
+
+typedef unsigned char uchar_t;
+
+enum anntp_state {
+ ANS_OFF,
+ ANS_CONNECTING,
+ ANS_READY,
+ ANS_ERROR,
+};
+
+typedef enum anntp_state AnntpState;
+
+typedef struct anntp_connection AnntpConnection;
+
+struct anntp_connection {
+ int fd; /* socket file descriptor */
+ AnntpState state; /* current connection state */
+ Bool use_tls; /* whether to use TLS */
+ char* host; /* hostname string */
+ struct hostent* host_he; /* resolved host entry from gethostbyname/gethostbyaddr */
+ struct in_addr addr; /* resolved IP address */
+ uchar_t read_buffer[ANNTP_BUFSIZE]; /* read buffer */
+ size_t read_len; /* current length of data in buffer */
+};
+
+ANNTP_API AnntpConnection* anntp_mkconn(const char* host, int port);
+ANNTP_API void anntp_freeconn(AnntpConnection* conn);
+ANNTP_API int anntp_connect(AnntpConnection* conn);
+ANNTP_API ssize_t anntp_read(AnntpConnection* conn, uchar_t* buf, size_t bufsize);
+ANNTP_API ssize_t anntp_write(AnntpConnection* conn, const uchar_t* buf, size_t bufsize);
+
+#endif /* ANNTP_H */
+
+#ifdef ANNTP_IMPLEMENTATION
+
+void
+anntp_init(void)
+{
+ /*
+ * for now, there is nothing to do here...
+ */
+}
+
+AnntpConnection*
+anntp_mkconn(const char* host, Bool tls)
+{
+ /* do some initting */
+ AnntpConnection* cv = (AnntpConnection*)ANNTP_MALLOC(sizeof(AnntpConnection));
+ if (!cv)
+ return NULL; /* check errno */
+
+ memset(cv, 0, sizeof(cv));
+ cv->host = strdup(host);
+ cv->use_tls = tls;
+ cv->state = ANS_OFF;
+
+ /* first, we get a nice nonblocking two-way socket over TCP from the kernel... */
+ cv->fd = socket(AF_INET, SOCK_STREAM, SOCK_NONBLOCK);
+ if (cv->fd < 0) {
+ perror("anntp - making connection socket");
+ goto cleanup;
+ }
+
+ /* now resolve the host name... */
+ struct addrinfo hints, *res = NULL;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+
+ /* look mom! i made go in c! */
+ int err = getaddrinfo(host, NULL, &hints, &res);
+ if (err != 0) {
+ fprintf(stderr, "anntp - cant resolve host `%s': %s", host, gai_strerror(err)); /* if you find whoever made this function of *HELL*, tell him how much i hate him */
+ close(cv->fd);
+ goto cleanup;
+ }
+
+ if (res) {
+ struct sockaddr_in* sa = (struct sockaddr_in*)res->ai_addr;
+ /* store info */
+ memcpy(&cv->host_he->h_addr_list, &sa->sin_addr, sizeof(struct in_addr));
+ cv->host_he->h_name = strdup(host);
+ }
+
+ freeaddrinfo(res);
+ cv->state = ANS_CONNECTING;
+
+ return cv;
+
+cleanup:
+ ANNTP_FREE(cv->host);
+ ANNTP_FREE(cv);
+ return NULL;
+}
+
+
+
+#endif /* ANNTP_IMPLEMENTATION */
+
diff --git a/test.c b/test.c
@@ -0,0 +1,2 @@
+#define ANNTP_IMPLEMENTATION
+#include "anntp.h"
