84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/*
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* Handling communication with clients.
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*/
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#include "moxerver.h"
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/* Closes client connection. */
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int client_close(struct client_t *client) {
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char timestamp[TIMESTAMP_LEN];
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/* force closing in case of error */
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if (close(client->socket) == -1) {
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close(client->socket);
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}
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client->socket = -1;
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time2string(time(NULL), timestamp);
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fprintf(stderr,"[%s] socket closed for client %s @ %s\n", __func__, client->ip_string, timestamp);
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return 0;
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}
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/* Reads data from client into client data buffer. Returns number of read bytes. */
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int client_read(struct client_t *client) {
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int len;
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/* read client data */
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len = recv(client->socket, client->data, sizeof(client->data)-1, 0);
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if (len == -1) {
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fprintf(stderr, "[%s:%d] error %d: %s\n", __func__, __LINE__, errno, strerror(errno));
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return -errno;
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}
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/* a disconnected client socket is ready for reading but read returns 0 */
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if (len == 0) {
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fprintf(stderr, "[%s:%d] no data available from client\n", __func__, __LINE__);
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return -ENODATA;
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}
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//TODO let's print received bytes during development phase...
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if (debug_messages) {
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int i;
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for(i = 0; i < len; i++) {
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fprintf(stderr, "client %s <- %u '%c'\n",
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client->ip_string,
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(unsigned char) client->data[i],
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(unsigned char) client->data[i]);
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}
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}
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/* handle special telnet characters coming from client */
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telnet_handle_client_read(client->data, &len);
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/* grab current time and store it as client last activity */
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client->last_active = time(NULL);
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return len;
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}
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/* Sends data from a buffer to client. Returns number of sent bytes. */
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int client_write(struct client_t *client, char *databuf, int datalen) {
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int len;
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/* handle special telnet characters to display them correctly on client */
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//telnet_handle_client_write(databuf, &datalen);
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//TODO let's print received bytes during development phase...
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if (debug_messages) {
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int i;
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for(i = 0; i < datalen; i++) {
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fprintf(stderr, "client %s -> %u '%c'\n",
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client->ip_string,
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(unsigned char) databuf[i],
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(unsigned char) databuf[i]);
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}
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}
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/* send data to client */
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len = send(client->socket, databuf, datalen, 0);
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if (len == -1) {
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fprintf(stderr, "[%s:%d] error %d: %s\n", __func__, __LINE__, errno, strerror(errno));
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return -errno;
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}
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return len;
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}
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