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-rw-r--r--src/communication.c175
1 files changed, 0 insertions, 175 deletions
diff --git a/src/communication.c b/src/communication.c
deleted file mode 100644
index 9ede401..0000000
--- a/src/communication.c
+++ /dev/null
@@ -1,175 +0,0 @@
-/**
- * coopgammad -- Cooperative gamma server
- * Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#include "communication.h"
-#include "state.h"
-#include "servers/coopgamma.h"
-
-#include <sys/socket.h>
-#include <errno.h>
-#include <string.h>
-
-
-
-/**
- * Send a message
- *
- * @param conn The index of the connection
- * @param buf The data to send
- * @param n The size of `buf`
- * @return Zero on success, -1 on error, 1 if disconncted
- * EINTR, EAGAIN, EWOULDBLOCK, and ECONNRESET count
- * as success (ECONNRESET cause 1 to be returned),
- * and are handled appropriately.
- */
-int send_message(size_t conn, char* restrict buf, size_t n)
-{
- struct ring* restrict ring = outbound + conn;
- int fd = connections[conn];
- int saved_errno;
- size_t ptr = 0;
- ssize_t sent;
- size_t chunksize = n;
- size_t sendsize;
- size_t old_n;
- char* old_buf;
-
- while ((old_buf = ring_peek(ring, &old_n)))
- {
- size_t old_ptr = 0;
- while (old_ptr < n)
- {
- sendsize = old_n - old_ptr < chunksize ? old_n - old_ptr : chunksize;
- sent = send(fd, old_buf + old_ptr, sendsize, MSG_NOSIGNAL);
- if (sent < 0)
- {
- if (errno == EPIPE)
- errno = ECONNRESET;
- if (errno != EMSGSIZE)
- goto fail;
- chunksize >>= 1;
- if (chunksize == 0)
- goto fail;
- continue;
- }
- old_ptr += (size_t)sent;
- ring_pop(ring, (size_t)sent);
- }
- }
-
- while (ptr < n)
- {
- sendsize = n - ptr < chunksize ? n - ptr : chunksize;
- sent = send(fd, buf + ptr, sendsize, MSG_NOSIGNAL);
- if (sent < 0)
- {
- if (errno == EPIPE)
- errno = ECONNRESET;
- if (errno != EMSGSIZE)
- goto fail;
- chunksize >>= 1;
- if (chunksize == 0)
- goto fail;
- continue;
- }
- ptr += (size_t)sent;
- }
-
- free(buf);
- return 0;
-
- fail:
- switch (errno)
- {
- case EINTR:
- case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
- case EWOULDBLOCK:
-#endif
- if (ring_push(ring, buf + ptr, n - ptr) < 0)
- goto proper_fail;
- free(buf);
- return 0;
- case ECONNRESET:
- free(buf);
- if (connection_closed(fd) < 0)
- return -1;
- return 1;
- default:
- break;
- }
- proper_fail:
- saved_errno = errno;
- free(buf);
- errno = saved_errno;
- return -1;
-}
-
-
-/**
- * Send a custom error without an error number
- *
- * @param conn The index of the connection
- * @param message_id The ID of the message to which this message is a response
- * @param desc The error description to send
- * @return 1: Client disconnected
- * 0: Success (possibily delayed)
- * -1: An error occurred
- */
-int (send_error)(size_t conn, const char* restrict message_id, const char* restrict desc)
-{
- char* restrict buf;
- size_t n;
-
- MAKE_MESSAGE(&buf, &n, 0,
- "Command: error\n"
- "In response to: %s\n"
- "Error: custom\n"
- "Length: %zu\n"
- "\n"
- "%s\n",
- message_id, strlen(desc) + 1, desc);
-
- return send_message(conn, buf, n);
-}
-
-
-/**
- * Send a standard error
- *
- * @param conn The index of the connection
- * @param message_id The ID of the message to which this message is a response
- * @param number The value of `errno`, 0 to indicate success
- * @return 1: Client disconnected
- * 0: Success (possibily delayed)
- * -1: An error occurred
- */
-int (send_errno)(size_t conn, const char* restrict message_id, int number)
-{
- char* restrict buf;
- size_t n;
-
- MAKE_MESSAGE(&buf, &n, 0,
- "Command: error\n"
- "In response to: %s\n"
- "Error: %i\n"
- "\n",
- message_id, number);
-
- return send_message(conn, buf, n);
-}
-