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main.c
704 lines (644 loc) · 15.4 KB
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main.c
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/*
* author: mardyu<michealyxd@hotmail.com>
* create date: 11/28/2015
* desc: a simple irc-client for command line
*/
#include <stdlib.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <time.h>
#include <sys/mman.h>
#include <netdb.h>
#define SOCK_PATH "IRC_Server"
#define SOCK_MAX_CLIENT 10
#define MAX_CLIENT_SEND_BUFF_SZ 4096
#define IRC_SERVER_URL "adams.freenode.net"
#define IRC_SERVER_PORT 6667
#define MIN(x, y) (x) > (y) ? (y) : (x)
#define MAX(x, y) (x) > (y) ? (x) : (y)
typedef struct node {
struct node *next;
void *v;
} node_t;
typedef struct irc_data {
int socket_fd;
// char **channel_names;
pthread_t thread_recv;
pthread_t thread_send;
pthread_mutex_t list_lock;
node_t list;
char *nickname;
// int ch_select;
// int ch_cur_count;
// int ch_total_count;
} irc_data_t;
void irc_init(irc_data_t *data)
{
data->socket_fd = 0;
// data->channel_names = NULL;
data->nickname = NULL;
// data->ch_select = -1;
// data->ch_cur_count = 0;
// data->ch_total_count = 0;
pthread_mutex_init(&data->list_lock, NULL);
data->list.next = NULL;
data->list.v = NULL;
}
void irc_free(irc_data_t *data)
{
close(data->socket_fd);
if (NULL != data->nickname) {
free(data->nickname);
data->nickname = NULL;
}
pthread_cancel(data->thread_recv);
pthread_cancel(data->thread_send);
pthread_mutex_lock(&data->list_lock);
while(data->list.next != NULL) {
node_t *n = data->list.next;
data->list.next = n->next;
if (NULL != n->v)
free(n->v);
free(n);
}
pthread_mutex_unlock(&data->list_lock);
pthread_mutex_destroy(&data->list_lock);
/*
int i = 0;
for (i = 0; i < data->ch_cur_count; ++i) {
if (NULL != data->channel_names[i]) {
free(data->channel_names[i]);
data->channel_names[i] = NULL;
}
}
free(data->channel_names);
*/
}
void irc_channel_send_msg(irc_data_t *data,const char *msg, int len)
{
char *msg_end = "\r\n";
node_t *n = (node_t *) malloc(sizeof(node_t));
n->v = malloc(len + strlen(msg_end) + 1);
memcpy(n->v, msg, len);
memcpy(n->v + len, msg_end, strlen(msg_end));
((char *)n->v)[len + strlen(msg_end)] = '\0';
pthread_mutex_lock(&data->list_lock);
n->next = data->list.next;
data->list.next = n;
pthread_mutex_unlock(&data->list_lock);
}
node_t * irc_channel_get_msg(irc_data_t *data)
{
if (NULL == data)
return NULL;
pthread_mutex_lock(&data->list_lock);
node_t *n = data->list.next;
if (NULL != n)
data->list.next = n->next;
else
data->list.next = NULL;
pthread_mutex_unlock(&data->list_lock);
return n;
}
/*
* remove all \r \n
* */
void handle_msg_remove_illegal_ch(char *msg, int len)
{
int i = 0;
for (i = 0; i < len; i++) {
switch (msg[i]) {
case '\n':
case '\r':
msg[i] = ' ';
break;
}
}
}
typedef struct custom_command {
const char cmd_shortcut;
const char * const cmd_name;
const char * const irc_cmd_name;
int cmd_params_count;
const char * const cmd_comment;
} custom_command_t;
const custom_command_t IRC_COMMAND[] = {
{ 'n', "name", "NICK", 1, "set nickname: /n mynickname"},
{ 'l', "login", "USER", 0, "login(need set nickname first): /l"},
{ 'j', "join", "JOIN", 1, "join channel: /j #ubuntu"},
{ 'L', "leave", "PART", 1, "leave channel: /L"},
{ 'q', "quit", "QUIT", 0, "quit from irc: /q"},
{ 'N', "namelist", "NAMES", 0, "list name from channel: /N"},
{ 'c', "channel", "LIST", 0, "list channel or topic: /c"},
{ 'i', "invite", "INVITE", 2, "invite other to channel: /i other-nickname"},
{ 'k', "kickout", "KICK", 2, "kick other out of channel: /k other-nickname"},
{ 'm', "message", "PRIVMSG", 1, "send msg in cur channel: /m helloworld"},
{ 'M', "custom-msg", "PRIVMSG", 2, "send msg to other channel"},
{ 'p', "person-talk", "PRIVMSG", 2, "talk to other user: /p other-nickname hi?"},
{ 'w', "who", "WHO", 0, "search user"},
{ 'W', "whois", "WHOIS", 1, "search user info"},
NULL
};
void print_usage()
{
fprintf(stdout, "Command Usage:\n");
const custom_command_t *cmd = IRC_COMMAND;
while (cmd) {
fprintf(stdout, "cmd: %c, %s \t\t\t%s\n"
, cmd->cmd_shortcut ? cmd->cmd_shortcut : ' '
, cmd->cmd_name, cmd->cmd_comment);
cmd ++;
}
fprintf(stdout, "\n");
}
void handle_custom_client_command(irc_data_t *data, char *buf, int len)
{
// printf("handle_custom_client_command\n");
if (len < 2) {
allUsage:
print_usage();
return;
}
int max_sz = MAX_CLIENT_SEND_BUFF_SZ - 1;
char msg_buf[MAX_CLIENT_SEND_BUFF_SZ];
int cur = 0;
char *p = NULL;
const custom_command_t *cmd = IRC_COMMAND;
while(NULL != cmd) {
p = buf + 1;
if (cmd->cmd_shortcut == *p && len >= 2
&& '\0' == *(p + 1)) {
p++;
break;
}
else if (cmd->cmd_shortcut == *p && len >= 3
&& ' ' == *(p + 1)) {
p++;
break;
}
else if (len >= 1 + strlen(cmd->cmd_name)
&& 0 == strncmp(p, cmd->cmd_name
, strlen(cmd->cmd_name))) {
p += strlen(cmd->cmd_name);
if ('\0' == *p) {
break;
} else if (' ' == *p) {
/*p++;*/
break;
}
}
cmd ++;
}
if (!cmd) {
printf("cannot match command!\n");
goto allUsage;
}
/*printf("match command: %s\n", cmd->cmd_name);*/
int params_count = cmd->cmd_params_count;
char *params_p = p;
while (params_count) {
if (p - buf + 1 >= len)
break;
p = strchr(p, ' ');
if (!p)
break;
p++;
params_count --;
}
if (params_count) {
usage:
fprintf(stderr, "cmd: %c, %s need %d args"
, cmd->cmd_shortcut ? cmd->cmd_shortcut : ' '
, cmd->cmd_name, cmd->cmd_params_count);
return;
}
p = params_p;
if (' ' == *p)
p++;
if (0 == strcmp("name", cmd->cmd_name)) {
if (data->nickname && 2 + strlen(data->nickname) + cur < max_sz)
{
cur += sprintf(msg_buf + cur, ":%s ", data->nickname);
}
char *nickname = data->nickname;
data->nickname = NULL;
if (nickname)
free(nickname);
nickname = (char *)malloc(strlen(p) + 1);
strcpy(nickname, p);
nickname[strlen(p)] = '\0';
data->nickname = nickname;
} else if (0 == strcmp("login", cmd->cmd_name)) {
/* need set nickname first */
if (NULL == data->nickname) {
fprintf(stderr, "error: need set nickname first");
return;
}
if (strlen(cmd->irc_cmd_name) + 4 + 2 + 1
+ 2 * strlen(data->nickname) < max_sz) {
cur += sprintf(msg_buf + cur, "%s %s * * :%s"
, cmd->irc_cmd_name
, data->nickname
, data->nickname);
goto send;
}
}
if (strlen(cmd->irc_cmd_name) + 1 + strlen(p) < max_sz) {
cur += sprintf(msg_buf + cur, "%s %s", cmd->irc_cmd_name
, p);
} else
{
goto usage;
}
send:
irc_channel_send_msg(data, msg_buf, cur);
}
/*
* handle msg from client
* */
void handle_msg_from_client(irc_data_t *data, char *buf, int len)
{
// printf("handle_msg_from_client\n");
if (NULL == buf || 0 == len)
return;
if ('/' != buf[0]) {
printf("send msg to list\n");
irc_channel_send_msg(data, buf, len);
return;
} else if('/' == buf[0]) {
handle_custom_client_command(data, buf, len);
}
}
void * thread_send_msg_to_server(void *args)
{
irc_data_t *data = (irc_data_t *) args;
node_t *n = NULL;
struct timespec timespan;
timespan.tv_sec = 0;
timespan.tv_nsec = 1000 * 1000 * 100; /* 100 ms*/
int timecount = 0; //
const int time_limit = 200;
const char * const msg_ping = "PING :ALIVECHECK\r\n";
int len = 0;
int send_count = 0;
int ret = 0;
for (;;) {
n = irc_channel_get_msg(data);
if (NULL != n && NULL != n->v) {
len = strlen(n->v);
send_count = 0;
while(len > send_count) {
ret = send(data->socket_fd, n->v + send_count
, len - send_count, 0);
if (-1 == ret) {
perror("send irc server error\n");
break;
}
send_count += ret;
}
/*int i = 0;*/
/*for (i = 0; i < len; ++i) {*/
/*fprintf(stdout, "0x%.2X", ((char*) n->v)[i]);*/
/*}*/
/*fprintf(stdout, "\n");*/
free(n->v);
free(n);
if (len != send_count)
{
perror("send fail, send thread exit");
break;
}
// printf("[local_client]: send msg success\n");
timecount = 0;
} else if (NULL != n && NULL == n->v) {
timecount ++;
free(n);
} else {
timecount ++;
}
if (timecount > time_limit && data->nickname) {
timecount = 0;
irc_channel_send_msg(data, msg_ping, strlen(msg_ping));
}
nanosleep(×pan, NULL);
n = NULL;
}
pthread_exit(data);
return data;
}
char * strnchr(char *buf, int ch, int len)
{
char *p = buf;
while (*p && len -- > 0) {
if (*p == ch)
return p;
p++;
}
if (*p != ch)
return NULL;
else
return p;
}
char * strnrchr(char *buf, int ch, int len)
{
char *p = buf;
char *p_match = NULL;
while (*p && len -- > 0) {
if (*p == ch)
p_match = p;
p++;
}
if (*p != ch) {
if (!p_match)
return NULL;
else
return p_match;
} else
return p;
}
void handle_msg_from_server(char *buf, int len)
{
char *p = NULL;
char *p_head = NULL;
int head_sz = 0;
char *p_cmd = NULL;
int cmd_sz = 0;
int cur = 0;
if (!buf || 0 >= len)
return;
if (':' == buf[0]) {
p_head = &buf[1];
p = strnchr(buf + cur, ' ', len - cur);
if (!p) {
p_head = NULL;
head_sz = 0;
err:
// some time server send package too bigger
fprintf(stderr, "error parse\n");
write(STDERR_FILENO, buf, len);
fprintf(stderr, "\n");
return;
}
*p = '\0';
head_sz = p - p_head;
cur = p - buf + 1;
// keep only nickname
p = strnchr(p_head, '!', head_sz);
if (p) {
*p = '\0';
} else {
p = strnchr(p_head, '@', head_sz);
}
if (p)
p = '\0';
}
if (cur >= len)
return;
p_cmd = buf + cur;
p = p_cmd;
p = strnchr(p_cmd, ' ', len - cur);
if (!p) {
fprintf(stderr, "parse cmd error\n");
goto err;
}
*p = '\0';
cmd_sz = p - p_cmd;
cur += cmd_sz + 1;
int end_sz = 0;
p = strnchr(buf + cur, '\r', len - cur);
if (p) {
*p = '\0';
if ('\n' == *(p + 1)) {
end_sz = p - buf + 2;
*(p + 1) = '\0';
} else
end_sz = p - buf + 1;
}
if (0 == strncmp("PRIVMSG", p_cmd, cmd_sz)
|| 0 == strncmp("NOTICE", p_cmd, cmd_sz)
|| 0 == strncmp("001", p_cmd, cmd_sz)
/*|| 0 == strncmp("JOIN", p_cmd, cmd_sz)*/
/*|| 0 == strncmp("PART", p_cmd, cmd_sz)*/
) {
char *p_channel = NULL;
int channel_sz = 0;
p_channel = buf + cur;
p = strnchr(p_channel, ' ', len - cur);
if (!p) {
p = strnchr(p_channel, '\0', len - cur);
}
if (!p) {
fprintf(stderr, "parse channel error\n");
goto err;
}
*p = '\0';
channel_sz = p - p_channel;
cur += channel_sz + 1;
fprintf(stdout, "%s [%s]{%s} %s\n", p_cmd, p_channel, p_head
, buf + cur);
// write(STDOUT_FILENO, buf + cur, len - cur);
} else if (
/*0 == strncmp("QUIT", p_cmd, cmd_sz)*/
0 == strncmp("ERROR", p_cmd, cmd_sz)
||0 == strncmp("MODE", p_cmd, cmd_sz)
||0 == strncmp("332", p_cmd, cmd_sz)
) {
fprintf(stdout, "%s %s %s\n", p_head, p_cmd, buf + cur);
// write(STDOUT_FILENO, buf + cur, len - cur);
}
// fprintf(stdout, "\n");
handle_msg_from_server(buf + end_sz, len - end_sz);
}
void * thread_recv_msg_from_server(void *args)
{
irc_data_t *data = (irc_data_t *) args;
int ret = 0;
int len = MAX_CLIENT_SEND_BUFF_SZ;
char *buf = (char *)mmap(NULL, len, PROT_READ | PROT_WRITE
, MAP_PRIVATE | MAP_ANON, -1, len);
char *p_end = NULL;
int cur = 0;
if (NULL == buf) {
goto err;
}
for (;;) {
ret = recv(data->socket_fd, buf + cur, len - cur, 0);
if (-1 == ret) {
perror("recv error, recv thread exit!");
break;
}
cur += ret;
p_end = strnrchr(buf, '\r', cur);
// max net page is smaller than MAX_CLIENT_SEND_BUFF_SZ / 2
if (p_end && '\n' == *(p_end + 1)) {
ret = p_end - buf;
ret += 2;
} else {
ret = cur;
}
handle_msg_from_server(buf, ret);
cur -= ret;
if (cur < 0)
cur = 0;
memcpy(buf, buf + ret, cur);
}
err:
if (NULL != buf)
munmap(buf, len);
buf = NULL;
pthread_exit(data);
return data;
}
int create_client_socket(char *ip, short port)
{
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(ip);
server_addr.sin_port = htons(port);
int s_fd = socket(AF_INET, SOCK_STREAM, 0);
// printf("socket success\n");
if (0 > s_fd) {
perror("socket error!\n");
return -1;
}
// printf("connect start\n");
if (-1 == connect(s_fd, (struct sockaddr *)&server_addr
, sizeof(server_addr))) {
perror("connect error");
return -2;
}
// fprintf(stdout, "connect to %s\n", ip);
return s_fd;
}
int get_ip_from_hostname(char *hostname, char *ip, int ip_len)
{
// 128: ipv6 + :: <= 60 char
struct hostent *host = gethostbyname(hostname);
if (NULL == host) {
fprintf(stderr, "get ip from host error: %s\n", hostname);
return -1;
}
if (host->h_length < 1 || NULL == host->h_addr_list) {
fprintf(stderr, "the hostname don't have ip list: %s\n", hostname);
return -2;
}
if (strlen(host->h_addr_list[0]) > ip_len) {
perror("ip array too short!\n");
return -3;
}
struct in_addr **addr_list = (struct in_addr**)host->h_addr_list;
strcpy(ip, inet_ntoa(*addr_list[0]));
int i = 0;
/*
for (i = 0; i < host->h_length; ++i) {
printf("ip: %s\n", inet_ntoa(*addr_list[i]));
}
*/
return 0;
}
void handle_client(int client_fd, char *ip, short port)
{
irc_data_t irc_channels;
char buf[MAX_CLIENT_SEND_BUFF_SZ];
int retn = 0;
irc_init(&irc_channels);
if (0 != get_ip_from_hostname(ip, buf, sizeof(buf))) {
perror("get ip from host error\n");
goto err;
}
printf("connect to irc server: %s[%s] %d\n", ip, buf, port);
irc_channels.socket_fd = create_client_socket(buf, port);
if (0 > irc_channels.socket_fd) {
goto err;
}
if (0 != pthread_create(&irc_channels.thread_recv, NULL
, thread_recv_msg_from_server, &irc_channels)) {
perror("create recv thread error!");
goto err;
}
if (0 != pthread_create(&irc_channels.thread_send, NULL
, thread_send_msg_to_server, &irc_channels)) {
perror("create send thread error!");
goto err;
}
for(;;) {
retn = recv(client_fd, buf, sizeof(buf) - 1, 0);
if (retn > 0) {
buf[retn - 1] = '\0';
fprintf(stdout, "[local-client]: recv: %s\n",buf);
handle_msg_remove_illegal_ch(buf, retn);
handle_msg_from_client(&irc_channels, buf, retn - 1);
} else if (0 == retn) {
fprintf(stdout, "client offline");
break;
} else {
fprintf(stderr, "client error");
break;
}
}
err:
close(client_fd);
irc_free(&irc_channels);
}
int main(int argc, void **args)
{
short port = IRC_SERVER_PORT;
char *ip = IRC_SERVER_URL;
if (argc >= 2)
ip = (char *)args[1];
if (argc >= 3) {
// port = (short)*(int *)args[2];
port = (short) atoi((char *)args[2]);
}
int socket_fd, client_fd;
struct sockaddr_un local_addr, client_addr;
if ((socket_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
perror("socket error");
perror(strerror(errno));
return -1;
}
local_addr.sun_family = AF_UNIX;
strcpy(local_addr.sun_path, SOCK_PATH);
unlink(local_addr.sun_path);
int len = strlen(local_addr.sun_path)
+ sizeof(local_addr.sun_family);
if (-1 == bind(socket_fd, (struct sockaddr *)&local_addr, len)) {
perror("bind error");
perror(strerror(errno));
return -2;
}
if (-1 == listen(socket_fd, SOCK_MAX_CLIENT)) {
perror("listen error");
perror(strerror(errno));
return -3;
}
// printf("unix domain socket start");
for(;;) {
memset(client_addr.sun_path, 0
, sizeof(client_addr.sun_path));
len = sizeof(client_addr);
if (-1 == (client_fd = accept(socket_fd
, (struct sockaddr *)&client_addr
, &len))) {
perror("accept error");
perror(strerror(errno));
exit(-4);
}
// printf("client info: path: %s\n", client_addr.sun_path);
if (0 == fork()) {
close(socket_fd);
handle_client(client_fd, ip, port);
exit(0);
}
close(client_fd);
}
close(socket_fd);
return 0;
}