thodg/libgit2/src/netops.c

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• Hash : 6e34111e
  Author :
  Date : 2011-09-29T16:30:38
  

  netops: Use pragmas only in MSVC

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• src/netops.c

• /*
   * Copyright (C) 2009-2011 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef _WIN32
  #	include <sys/types.h>
  #	include <sys/socket.h>
  #	include <sys/select.h>
  #	include <netdb.h>
  #else
  #	define _WIN32_WINNT 0x0501
  #	include <winsock2.h>
  #	include <Ws2tcpip.h>
  #	ifdef _MSC_VER
  #		pragma comment(lib, "Ws2_32.lib")
  #	endif
  #endif
  
  
  #include "git2/errors.h"
  
  #include "common.h"
  #include "netops.h"
  
  void gitno_buffer_setup(gitno_buffer *buf, char *data, unsigned int len, int fd)
  {
  	memset(buf, 0x0, sizeof(gitno_buffer));
  	memset(data, 0x0, len);
  	buf->data = data;
  	buf->len = len;
  	buf->offset = 0;
  	buf->fd = fd;
  }
  
  int gitno_recv(gitno_buffer *buf)
  {
  	int ret;
  
  	ret = recv(buf->fd, buf->data + buf->offset, buf->len - buf->offset, 0);
  	if (ret < 0)
  		return git__throw(GIT_EOSERR, "Failed to receive data: %s", strerror(errno));
  	if (ret == 0) /* Orderly shutdown, so exit */
  		return GIT_SUCCESS;
  
  	buf->offset += ret;
  
  	return ret;
  }
  
  /* Consume up to ptr and move the rest of the buffer to the beginning */
  void gitno_consume(gitno_buffer *buf, const char *ptr)
  {
  	size_t consumed;
  
  	assert(ptr - buf->data >= 0);
  	assert(ptr - buf->data <= (int) buf->len);
  
  	consumed = ptr - buf->data;
  
  	memmove(buf->data, ptr, buf->offset - consumed);
  	memset(buf->data + buf->offset, 0x0, buf->len - buf->offset);
  	buf->offset -= consumed;
  }
  
  /* Consume const bytes and move the rest of the buffer to the beginning */
  void gitno_consume_n(gitno_buffer *buf, size_t cons)
  {
  	memmove(buf->data, buf->data + cons, buf->len - buf->offset);
  	memset(buf->data + cons, 0x0, buf->len - buf->offset);
  	buf->offset -= cons;
  }
  
  int gitno_connect(const char *host, const char *port)
  {
  	struct addrinfo *info, *p;
  	struct addrinfo hints;
  	int ret, error = GIT_SUCCESS;
  	int s;
  
  	memset(&hints, 0x0, sizeof(struct addrinfo));
  	hints.ai_family = AF_UNSPEC;
  	hints.ai_socktype = SOCK_STREAM;
  
  	ret = getaddrinfo(host, port, &hints, &info);
  	if (ret != 0) {
  		error = GIT_EOSERR;
  		info = NULL;
  		goto cleanup;
  	}
  
  	for (p = info; p != NULL; p = p->ai_next) {
  		s = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
  		if (s < 0) {
  			error = GIT_EOSERR;
  			goto cleanup;
  		}
  
  		ret = connect(s, p->ai_addr, p->ai_addrlen);
  		/* If we can't connect, try the next one */
  		if (ret < 0) {
  			continue;
  		}
  
  		/* Return the socket */
  		error = s;
  		goto cleanup;
  	}
  
  	/* Oops, we couldn't connect to any address */
  	error = GIT_EOSERR;
  
  cleanup:
  	freeaddrinfo(info);
  	return error;
  }
  
  int gitno_send(int s, const char *msg, size_t len, int flags)
  {
  	int ret;
  	size_t off = 0;
  
  	while (off < len) {
  		ret = send(s, msg + off, len - off, flags);
  		if (ret < 0)
  			return git__throw(GIT_EOSERR, "Error sending data: %s", strerror(errno));
  
  		off += ret;
  	}
  
  	return off;
  }
  
  int gitno_select_in(gitno_buffer *buf, long int sec, long int usec)
  {
  	fd_set fds;
  	struct timeval tv;
  
  	tv.tv_sec = sec;
  	tv.tv_usec = usec;
  
  	FD_ZERO(&fds);
  	FD_SET(buf->fd, &fds);
  
  	/* The select(2) interface is silly */
  	return select(buf->fd + 1, &fds, NULL, NULL, &tv);
  }
  
  int gitno_extract_host_and_port(char **host, char **port, const char *url, const char *default_port)
  {
  	char *colon, *slash, *delim;
  	int error = GIT_SUCCESS;
  
  	colon = strchr(url, ':');
  	slash = strchr(url, '/');
  
  	if (slash == NULL)
  			return git__throw(GIT_EOBJCORRUPTED, "Malformed URL: missing /");
  
  	if (colon == NULL) {
  		*port = git__strdup(default_port);
  	} else {
  		*port = git__strndup(colon + 1, slash - colon - 1);
  	}
  	if (*port == NULL)
  		return GIT_ENOMEM;;
  
  
  	delim = colon == NULL ? slash : colon;
  	*host = git__strndup(url, delim - url);
  	if (*host == NULL) {
  		free(*port);
  		error = GIT_ENOMEM;
  	}
  
  	return error;
  }
  

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