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first commit, unfinished wip

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thorium1256
2026-05-11 15:14:22 +03:00
commit 8f4162305f
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2
.clangd Normal file
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Documentation:
CommentFormat: Doxygen

44
Makefile Normal file
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CC := clang
CFLAGS := -I include -Wall -Wextra
CFLAGS_DBG := $(CFLAGS) -g -O0
CFLAGS_REL := $(CFLAGS) -O2
LDFLAGS :=
LDFLAGS_REL := $(LDFLAGS) -s
BUILD_DIR := build
SRC_DIR := src
INCLUDE_DIR := include
APPLICATION := bbirc
APPLICATION_DBG := bbirc-debug
$(shell mkdir -p $(BUILD_DIR))
SRCS := $(wildcard $(SRC_DIR)/*.c)
DBG_OBJS := $(patsubst $(SRC_DIR)/%.c,$(BUILD_DIR)/dbg_%.o,$(SRCS))
REL_OBJS := $(patsubst $(SRC_DIR)/%.c,$(BUILD_DIR)/rel_%.o,$(SRCS))
.PHONY: all debug release clean
all: release
debug: $(APPLICATION_DBG)
release: $(APPLICATION)
both: debug release
$(APPLICATION): $(REL_OBJS)
$(CC) -o $@ $^ $(LDFLAGS_REL)
$(APPLICATION_DBG): $(DBG_OBJS)
$(CC) -o $@ $^ $(LDFLAGS)
$(BUILD_DIR)/dbg_%.o: $(SRC_DIR)/%.c
$(CC) -c -o $@ $^ $(CFLAGS_DBG)
$(BUILD_DIR)/rel_%.o: $(SRC_DIR)/%.c
$(CC) -c -o $@ $^ $(CFLAGS_REL)
clean:
rm -rf $(BUILD_DIR)
rm -rf $(APPLICATION)
rm -rf $(APPLICATION_DBG)

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README.md Normal file
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# BareBones IRC
An attempt at trying to make an IRC client in pure C with sockets.
**UNFINISHED!!!**

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TODO.md Normal file
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# To-Do
1. Add actual IRC client functionality
2. Finish the netcode
3. Don't care about the looks of it yet, just have an ANSI command line or something

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compile_commands.json Normal file
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[
{
"file": "src/main.c",
"arguments": [
"/usr/bin/clang",
"-c",
"-o",
"build/rel_main.o",
"src/main.c",
"-I",
"include",
"-Wall",
"-Wextra",
"-O2"
],
"directory": "/home/neon1246/Documents/stuff/code/c/ircclient",
"output": "build/rel_main.o"
}
]

39
include/IRC.h Normal file
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#ifndef IRC_H
#define IRC_H
typedef struct
{
char *nickname;
int nicklen;
char *ident;
int identlen;
char *hostname;
int hostlen;
} irc_hostmask_t;
typedef struct {
char line[513];
char *source;
char *command;
char *argv[16];
int argc;
} irc_message_t;
typedef struct
{
int sockfd;
irc_hostmask_t ownHostmask;
} irc_client_t;
typedef struct {
const char *name;
void (*handler)(irc_message_t *msg, irc_client_t *irc);
} command_t;
int IRC_ParseMessage(char* line, irc_message_t *msg);
void IRC_ProcessMessage(irc_message_t *msg, irc_client_t *irc);
void IRC_PRIVMSG(char* msg, irc_client_t irc);
#endif

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include/IRC_numerics.h Normal file
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#ifndef IRC_NUMERICS_H
#define IRC_NUMERICS_H
// * 0xx (initial login information)
#define RPL_WELCOME "001"
#define RPL_YOURHOST "002"
#define RPL_CREATED "003"
#define RPL_MYINFO "004"
#define RPL_ISUPPORT "005"
#define RPL_BOUNCE "010" /* deprecated */
// * 2xx (request information)
/* replies to STATS */
#define RPL_STATSCOMMANDS "212"
#define RPL_ENDOFSTATS "219"
#define RPL_STATSUPTIME "242"
/* server user modes on-connect */
#define RPL_UMODEIS "221"
/* replies to LUSERS */
#define RPL_LUSERCLIENT "251"
#define RPL_LUSEROP "252"
#define RPL_LUSERUNKNOWN "253"
#define RPL_LUSERCHANNELS "254"
#define RPL_LUSERME "255"
#define RPL_LOCALUSERS "265"
#define RPL_GLOBALUSERS "266"
/* replies to ADMIN */
#define RPL_ADMINME "256"
#define RPL_ADMINLOC1 "257"
#define RPL_ADMINLOC2 "258"
#define RPL_ADMINEMAIL "259"
/* generic replies (i.e. ratelimiting) */
#define RPL_TRYAGAIN "263"
/* WHOIS info */
#define RPL_WHOISCERTFP "276"
// * 3xx (information for clients)
#define RPL_NONE "300"
/* replies to WHOIS/WHOWAS */
#define RPL_AWAY "301"
#define RPL_WHOISREGNICK "307"
#define RPL_WHOISUSER "311"
#define RPL_WHOISSERVER "312"
#define RPL_WHOISOPERATOR "313"
#define RPL_WHOWASUSER "314"
#define RPL_WHOISIDLE "317"
#define RPL_WHOISCHANNELS "319"
#define RPL_WHOISSPECIAL "320"
#define RPL_WHOISACCOUNT "330"
#define RPL_WHOISACTUALLY "338"
#define RPL_WHOISHOST "378"
#define RPL_WHOISMODES "379"
#define RPL_ENDOFWHOIS "318"
#define RPL_ENDOFWHOWAS "369"
#define ERR_WASNOSUCHNICK "406" /* WHOWAS error */
#define RPL_WHOISSECURE "671"
/* replies to WHO */
#define RPL_WHOREPLY "352"
#define RPL_ENDOFWHO "315"
/* replies to LIST */
#define RPL_LISTSTART "321"
#define RPL_LIST "322"
#define RPL_LISTEND "323"
/* upon joining a channel */
#define RPL_CHANNELMODEIS "324"
#define RPL_CREATIONTIME "329"
#define RPL_TOPIC "332"
#define RPL_TOPICWHOTIME "333"
/* replies to TOPIC */
#define RPL_NOTOPIC "331"
/* replies to INVITE */
#define RPL_INVITELIST "336"
#define RPL_ENDOFINVITELIST "337"
#define RPL_INVITING "341"
/* replies to MODE */
#define RPL_INVEXLIST "346"
#define RPL_ENDOFINVEXLIST "347"
#define RPL_EXCEPTLIST "348"
#define RPL_ENDOFEXCEPTLIST "349"
#define RPL_BANLIST "367"
#define RPL_ENDOFBANLIST "368"
#define ERR_INVALIDMODEPARAM "696"
/* replies to INFO */
#define RPL_INFO "371"
#define RPL_ENDOFINFO "374"
/* when sending a Message of the Day */
#define RPL_MOTDSTART "375"
#define RPL_MOTD "372"
#define RPL_ENDOFMOTD "376"
/* replies to VERSION */
#define RPL_VERSION "351"
/* replies to NAMES */
#define RPL_NAMREPLY "353"
#define RPL_ENDOFNAMES "366"
/* replies to LINKS */
#define RPL_LINKS "364"
#define RPL_ENDOFLINKS "365"
/* replies to OPER */
#define RPL_YOUREOPER "381"
/* replies to REHASH */
#define RPL_REHASHING "382"
/* replies to TIME */
#define RPL_TIME "391"
/* replies to USERHOST */
#define RPL_USERHOST "302"
/* sent to clients to inform of away status */
#define RPL_UNAWAY "305"
#define RPL_NOWAWAY "306"
// * 4xx and 5xx (errors)
#define ERR_UNKNOWNERROR "400"
#define ERR_NOSUCHNICK "401"
#define ERR_NOSUCHSERVER "402"
#define ERR_NOSUCHCHANNEL "403"
#define ERR_CANNOTSENDTOCHAN "404"
#define ERR_TOOMANYCHANNELS "405"
#define ERR_NOORIGIN "409"
#define ERR_NORECIPIENT "411"
#define ERR_NOTEXTTOSEND "412"
#define ERR_INPUTTOOLONG "417"
#define ERR_UNKNOWNCOMMAND "421"
#define ERR_NOMOTD "422"
#define ERR_NONICKNAMEGIVEN "431"
#define ERR_ERRONEUSNICKNAME "432"
#define ERR_NICKNAMEINUSE "433"
#define ERR_NICKCOLLISION "436"
#define ERR_USERNOTINCHANNEL "441"
#define ERR_NOTONCHANNEL "442"
#define ERR_USERONCHANNEL "443"
#define ERR_NOTREGISTERED "451"
#define ERR_NEEDMOREPARAMS "461"
#define ERR_ALREADYREGISTERED "462"
#define ERR_PASSWDMISMATCH "464"
#define ERR_YOUREBANNEDCREEP "465"
#define ERR_CHANNELISFULL "471"
#define ERR_UNKNOWNMODE "472"
#define ERR_INVITEONLYCHAN "473"
#define ERR_BANNEDFROMCHAN "474"
#define ERR_BADCHANNELKEY "475"
#define ERR_BADCHANMASK "476"
#define ERR_NOPRIVILEGES "481"
#define ERR_CHANOPRIVSNEEDED "482"
#define ERR_CANTKILLSERVER "483"
#define ERR_NOOPERHOST "491"
#define ERR_UMODEUNKNOWNFLAG "501"
#define ERR_USERSDONTMATCH "502"
#define ERR_INVALIDKEY "525"
/* replies to HELP */
#define ERR_HELPNOTFOUND "524"
#define RPL_HELPSTART "704"
#define RPL_HELPTXT "705"
#define RPL_ENDOFHELP "706"
// * 6xx (various TLS and IRCv3 stuff)
/* STARTTLS stuff */
#define RPL_STARTTLS "670"
#define ERR_STARTTLS "691"
// * 7xx (various)
#define ERR_NOPRIVS "723"
// * 9xx (authentication)
/* SASL */
#define RPL_LOGGEDIN "900"
#define RPL_LOGGEDOUT "901"
#define RPL_SASLSUCCESS "903"
#define ERR_NICKLOCKED "902"
#define ERR_SASLFAIL "904"
#define ERR_SASLTOOLONG "905"
#define ERR_SASLABORTED "906"
#define ERR_SASLALREADY "907"
#define RPL_SASLMECHS "908"
#endif

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#ifndef DEFINES_H
#define DEFINES_H
#define NUL '\0'
#endif

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include/netcode.h Normal file
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#ifndef NETCODE_H
#define NETCODE_H
// Returns a socket file descriptor.
int NET_Connect(const char* host, int port);
void NET_Send(int sockfd, const char* toSend);
void NET_Close(int sockfd);
#endif

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#include "IRC.h"
#include "defines.h"
#include "netcode.h"
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
int IRC_ParseMessage(char *line, irc_message_t *msg)
{
strncpy(msg->line, line, sizeof(msg->line) - 1);
char *ptr = msg->line;
ptr[sizeof(msg->line)] = NUL;
char *source = NULL;
char *command = NULL;
// get the source, if it exists (the : at the beginning of an IRC message)
if(*ptr == ':')
{
ptr++;
source = ptr;
while (*ptr && *ptr != ' ') ptr++;
if (*ptr) *ptr++ = NUL;
while (*ptr == ' ') ptr++; // skip any extra spaces
}
msg->source = source;
// read the command
command = ptr;
while(*ptr && *ptr != ' ') ptr++;
if (*ptr) *ptr++ = NUL;
msg->command = command;
while (*ptr == ' ') ptr++;
// read its arguments (until we encounter a colon/nullbyte)
msg->argc = 0;
while(*ptr && msg->argc <= 15)
{
if(*ptr == ':') // if it's a trailing arg
{
ptr++;
msg->argv[msg->argc] = ptr;
msg->argc++;
break;
}
msg->argv[msg->argc] = ptr;
while(*ptr && *ptr != ' ') ptr++;
if (*ptr)
{
*ptr++ = NUL;
while (*ptr == ' ') ptr++; // skip spaces for next arg
}
msg->argc++;
}
return 0;
}
static void handlePing(irc_message_t *msg, irc_client_t *irc)
{
char buf[128];
snprintf(buf, sizeof buf, "PONG :%s", msg->argv[0]);
NET_Send(irc->sockfd, buf);
}
void IRC_ProcessMessage(irc_message_t *msg, irc_client_t *irc)
{
command_t commands[] =
{
{"PING", handlePing},
{NULL, NULL}
};
for(int i = 0; commands[i].name; i++)
{
if(strcmp(msg->command, commands[i].name) == 0)
{
commands[i].handler(msg, irc);
}
}
}

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#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/select.h>
#include <stdbool.h>
#include "IRC.h"
#include "defines.h"
#include "netcode.h"
int main(int argc, char **argv)
{
int sockfd = NET_Connect("irc.libera.chat", 6667);
fd_set readfds;
static char linebuf[1026];
static size_t lineLen = 0;
char recvline[513];
char sendline[513];
irc_client_t irc;
irc.sockfd = sockfd;
if(sockfd >= 0)
{
NET_Send(sockfd, "NICK BareBonesDude\r\n");
NET_Send(sockfd, "USER BareBonesDude 0 * :The Postal Dudesksleton\r\n");
}
else
{
return 1;
}
while(1)
{
FD_ZERO(&readfds);
FD_SET(STDIN_FILENO, &readfds);
FD_SET(sockfd, &readfds);
int maxfd = (sockfd > 0) ? sockfd + 1 : 1;
select(maxfd, &readfds, NULL, NULL, NULL);
if(FD_ISSET(STDIN_FILENO, &readfds))
{
fgets(sendline, sizeof(sendline), stdin);
NET_Send(sockfd, sendline);
}
if(FD_ISSET(sockfd, &readfds))
{
ssize_t n = recv(sockfd, recvline, sizeof(recvline), 0);
if(n <= 0) break;
recvline[n] = NUL;
for(ssize_t i = 0; i < n; i++)
{
linebuf[lineLen++] = recvline[i];
if(lineLen >= 2 && linebuf[lineLen - 2] == '\r' && linebuf[lineLen - 1] == '\n')
{
// we found a complete line
linebuf[lineLen] = NUL;
// parse the message
irc_message_t msg;
IRC_ParseMessage(linebuf, &msg);
// try to print it
if(msg.source != NULL)
{
printf("%s: %s ", msg.source, msg.command);
}
else
{
printf("Server: %s ", msg.command);
}
for(int i = 0; i < msg.argc; i++)
{
printf("%s ", msg.argv[i]);
}
lineLen = 0;
}
if(lineLen >= sizeof(linebuf) - 1)
{
lineLen = 0;
}
}
}
}
printf("Connection closed by foreign host.\n");
return 0;
}

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#include "netcode.h"
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
int NET_Connect(const char *host, int port)
{
int status;
struct addrinfo hints, *res;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
// save us from user or programmer stupidity
if(!host)
{
return -1;
}
char portNumber[6];
snprintf(portNumber, 6, "%d", port);
printf("Looking up %s...\n", host);
if ((status = getaddrinfo(host, portNumber, &hints, &res)) == -1)
{
fprintf(stderr, "Unable to lookup %s: %s\n", host, gai_strerror(status));
return -1;
}
char ipstr[INET6_ADDRSTRLEN];
int sockfd = -1;
for(struct addrinfo *p = res; p != NULL; p = p->ai_next)
{
void *addr;
struct sockaddr_in *ipv4;
struct sockaddr_in6 *ipv6;
if(p->ai_family == AF_INET)
{
ipv4 = (struct sockaddr_in *)p->ai_addr;
addr = &(ipv4->sin_addr);
}
else
{
ipv6 = (struct sockaddr_in6 *)p->ai_addr;
addr = &(ipv6->sin6_addr);
}
inet_ntop(p->ai_family, addr, ipstr, sizeof ipstr);
printf("Connecting to %s (%s)...\n", host, ipstr);
if((sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1)
{
char perrorMsg[sizeof("Failed to connect to ") + sizeof ipstr];
snprintf(perrorMsg, sizeof perrorMsg, "Failed to connect to %s", ipstr);
perror(perrorMsg);
continue;
}
if((connect(sockfd, p->ai_addr, p->ai_addrlen)) == -1)
{
close(sockfd);
char perrorMsg[sizeof("Failed to connect to ") + sizeof ipstr];
snprintf(perrorMsg, sizeof perrorMsg, "Failed to connect to %s", ipstr);
perror(perrorMsg);
continue;
}
printf("Connected!\n");
break;
}
if(sockfd >= 0)
{
return sockfd;
}
else
{
return -1;
}
}
void NET_Send(int sockfd, const char *toSend)
{
size_t bytesSent = 0;
size_t sendLen = strlen(toSend);
while(bytesSent < sendLen)
{
ssize_t sent = send(sockfd, toSend, sendLen - bytesSent, 0);
if(sent == -1)
{
perror("NET_Send");
return;
}
if(sent == 0)
{
fprintf(stderr, "NET_Send: connection closed");
return;
}
bytesSent += sent;
}
}
void NET_Close(int sockfd)
{
if(sockfd >= 0)
{
shutdown(sockfd, SHUT_RDWR);
close(sockfd);
}
}