i now am a judge
and a good judge too
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parent
1cb5c464bb
commit
4319c22ea1
2 changed files with 149 additions and 32 deletions
137
src/wsock.c
137
src/wsock.c
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@ -1,5 +1,30 @@
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#include "wsock.h"
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/** UTILITIES **/
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/*****************/
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#define WS_REORDER_BUFLEN (sizeof(long double))
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inline int _sys_is_net_order() {
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return ((char*)(0xB00B))[0] == 0xB0;
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}
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void swap_order(char* in, int length) {
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if(_sys_is_net_order() || length > WS_REORDER_BUFLEN)
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return;
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char buf[WS_REORDER_BUFLEN];
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for(int i = 0; i < length; ++i)
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buf[i] = in[length - i - 1];
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memcpy(in, buf, length);
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}
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void swap_order_copy(char* in, char* out, int length) {
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memcpy(out, in, length);
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swap_order(out, length);
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}
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/** DATA BUFFER **/
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/*******************/
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@ -27,48 +52,67 @@ void buffer_append
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(buffer_t* buf, const char* data, int length)
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{
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if(buf->data != NULL) {
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if(buf->next == NULL)
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buf->next = buffer_create();
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buffer_append(buf->next, data, length);
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}
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} else {
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buf->data = malloc(length);
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strncpy(buf->data, data, length);
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buf->length = length;
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}
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}
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void buffer_append_str(buffer_t* buf, const char* data) {
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buffer_append(buf, data, strlen(data));
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}
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void _buffer_read(buffer_t* buf, char* out) {
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int _buffer_read(buffer_t* buf, char* out, int n) {
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int i = 0;
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while(buf != NULL) {
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while(buf != NULL && (!n || (n && i < n))) {
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if(!n || buf->length <= n - i) {
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strncpy(out + i, buf->data, buf->length);
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i += buf->length;
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buf = buf->next;
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} else if(n && buf->length > n - i) {
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strncpy(out + i, buf->data, n - i);
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i += n - i;
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}
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}
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return i;
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}
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int buffer_peek(buffer_t* buf, char* out, int length) {
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return _buffer_read(buf, out, length);
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}
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int buffer_peek_str(buffer_t* buf, char* out, int length) {
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int read = _buffer_read(buf, out, length);
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out[read] = '\0';
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return read;
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}
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int buffer_read(buffer_t* buf, char** out) {
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int length = buffer_length(buf);
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*out = malloc(length);
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_buffer_read(buf, *out);
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_buffer_read(buf, *out, 0);
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return length;
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}
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int buffer_read_str(buffer_t* buf, char** out) {
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int length = buffer_length(buf);
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*out = malloc(length + 1);
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out[length] = '\0';
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(*out)[length] = '\0';
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_buffer_read(buf, *out);
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_buffer_read(buf, *out, 0);
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return length;
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}
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int buffer_flush(buffer_t* buf, char** out) {
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int length = buffer_read(buf, out);
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buffer_clear(buf);
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return out;
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return length;
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}
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int buffer_flush_str(buffer_t* buf, char** out) {
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@ -105,6 +149,56 @@ void buffer_free(buffer_t* buf) {
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/** WEB SOCKET **/
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/******************/
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typedef struct {
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uint8_t fin, opcode, masked, head_length;
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uint8_t mask[4];
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uint64_t body_length;
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} _ws_head_t;
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typedef enum {
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WS_CONT = 0x0,
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WS_TEXT = 0x1,
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WS_BIN = 0x2,
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WS_CLOSE = 0x8,
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WS_PING = 0x9,
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WS_PONG = 0xA
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} _ws_opcode_t;
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int _wsock_header_length(char* head) {
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return 2
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+ ((head[1] & 0x80) == 0 ? 0 : 4)
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+ ((head[1] & 0x7F) < 0x7E ? 0
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: ((head[1] & 0x7F) == 0x7E ? 2 : 8));
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}
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int _wsock_read_header(char* head, _ws_head_t* out) {
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out->head_length = _wsock_header_length(head);
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out->fin = 0x80 & head[0];
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out->opcode = 0x0F & head[0];
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out->masked = 0x80 & head[1];
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if((head[0] & 0x70) != 0)
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return -1;
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if((head[0] & 0x0F) > 0x2 && (head[0] & 0x0F) < 0x8)
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return -1;
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if((head[0] & 0x0F) > 0xA && (head[0] & 0x0F) <= 0xF)
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return -1;
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int mask_start;
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if((head[1] & 0x7F) < 0x7E) {
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out->body_length = head[1] & 0x7F;
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mask_start = 2;
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} else if((head[1] & 0x7F) == 0x7E) {
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swap_order_copy(head[2], (char*)out->body_length, 2);
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mask_start = 4;
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} else {
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swap_order_copy(head[2], (char*)out->body_length, 8);
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mask_start = 10;
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}
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if(out->masked)
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memcpy(out->mask, head + mask_start, 4);
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}
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wsock_t* wsock_open
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(const char* host, const char* path, uint16_t port)
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{
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@ -153,8 +247,8 @@ wsock_t* wsock_open
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pfd.fd = sock;
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pfd.events = POLLIN;
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char* end;
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int total = 0;
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char* end;
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while((end = strstr(s_shake, "\r\n\r\n")) == NULL) {
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if(total + 1 >= sizeof(s_shake)
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|| poll(&pfd, 1, 5000) <= 0)
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@ -163,11 +257,14 @@ wsock_t* wsock_open
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return NULL;
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}
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total += recv(sock, s_shake + total,
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sizeof(s_shake) - total - 1, 0);
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total = recv(sock, s_shake, sizeof(s_shake) - 1, MSG_PEEK);
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s_shake[total] = '\0';
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}
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total = end - s_shake + 3;
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recv(sock, s_shake, total, 0);
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s_shake[total + 1] = '\0';
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const char resp_check[] = "HTTP/1.1 101 Switching Protocols";
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if(strncmp(s_shake, resp_check, sizeof(resp_check) - 1) != 0)
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{
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@ -178,11 +275,8 @@ wsock_t* wsock_open
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wsock_t* wsock = malloc(sizeof(wsock_t));
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wsock->sock = sock;
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wsock->mode = WS_BLOCK;
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wsock->buffer = buffer_create();
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if(total - 1 != (end - s_shake) + 3)
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buffer_append(wsock->buffer, end + 4,
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total - 1 - ((end - s_shake) + 3));
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wsock->recv_buf = buffer_create();
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wsock->send_buf = buffer_create();
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return wsock;
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}
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@ -194,7 +288,15 @@ int wsock_mode_get(wsock_t* ws) {
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return ws->mode;
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}
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int wsock_recv(wsock_t* ws, char** out) {
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char buffer[4096];
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int got = 0;
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do {
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//if((ws->mode & WS_NOBLOCK) != 0)
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} while((ws->mode & WS_FULL_RECV) != 0);
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return got;
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}
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int wsock_is_open(wsock_t* ws) {
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return ws->sock >= 0;
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@ -203,7 +305,8 @@ int wsock_is_open(wsock_t* ws) {
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void wsock_close(wsock_t* ws) {
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// todo: send close frame
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shutdown(ws->sock, SHUT_RDWR);
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buffer_free(ws->buffer);
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buffer_free(ws->recv_buf);
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buffer_free(ws->send_buf);
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free(ws);
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}
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28
src/wsock.h
28
src/wsock.h
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@ -1,12 +1,20 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/poll.h>
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#include <netdb.h>
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/** UTILITIES **/
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/*****************/
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void swap_order(char*, int);
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void swap_order_copy(char*, char*, int);
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/** DATA BUFFER **/
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/*******************/
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void buffer_append(buffer_t*, const char*, int);
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void buffer_append_str(buffer_t*, const char*);
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char* buffer_read(buffer_t*, int*);
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char* buffer_read_str(buffer_t*, int*);
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char* buffer_flush(buffer_t*, int*);
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char* buffer_flush_str(buffer_t*, int*);
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int buffer_peek(buffer_t*, char*, int);
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int buffer_peek_str(buffer_t*, char*, int);
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int buffer_read(buffer_t*, char**);
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int buffer_read_str(buffer_t*, char**);
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int buffer_flush(buffer_t*, char**);
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int buffer_flush_str(buffer_t*, char**);
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void buffer_clear(buffer_t*);
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void buffer_free(buffer_t*);
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// block until a full packet is received
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WS_FULL_RECV = 2,
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// block until a full packet is sent
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WS_FULL_SEND = 4
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WS_FULL_SEND = 4,
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// receive text frames as binary
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WS_RECV_ALL_BIN = 8
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} ws_mode_t;
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// mode options that are not mutually exclusive can be
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// concatenated using the OR (|) operator. note that
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@ -73,14 +85,16 @@ typedef enum {
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typedef struct {
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int sock, mode;
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buffer_t* buffer;
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buffer_t *recv_buf, *send_buf;
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} wsock_t;
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wsock_t* wsock_open(const char*, const char*, uint16_t);
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void wsock_mode_set(wsock_t*, int);
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int wsock_mode_get(wsock_t*);
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int wsock_recv(wsock_t*,
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int wsock_recv(wsock_t*, char**);
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int wsock_send(wsock_t*, char*, int);
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int wsock_send_str(wsock_t*, char*);
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int wsock_is_open(wsock_t*);
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void wsock_close(wsock_t*);
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