thodg/libgit2/src/netops.c

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• Hash : 05816a98
  Author :
  Date : 2020-04-05T17:20:08
  

  netops: use GIT_ASSERT

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• src/netops.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "netops.h"
  
  #include <ctype.h>
  #include "git2/errors.h"
  
  #include "posix.h"
  #include "buffer.h"
  #include "http_parser.h"
  #include "runtime.h"
  
  int gitno_recv(gitno_buffer *buf)
  {
  	return buf->recv(buf);
  }
  
  void gitno_buffer_setup_callback(
  	gitno_buffer *buf,
  	char *data,
  	size_t len,
  	int (*recv)(gitno_buffer *buf), void *cb_data)
  {
  	memset(data, 0x0, len);
  	buf->data = data;
  	buf->len = len;
  	buf->offset = 0;
  	buf->recv = recv;
  	buf->cb_data = cb_data;
  }
  
  static int recv_stream(gitno_buffer *buf)
  {
  	git_stream *io = (git_stream *) buf->cb_data;
  	size_t readlen = buf->len - buf->offset;
  	ssize_t ret;
  
  	readlen = min(readlen, INT_MAX);
  
  	ret = git_stream_read(io, buf->data + buf->offset, (int)readlen);
  	if (ret < 0)
  		return -1;
  
  	buf->offset += ret;
  	return (int)ret;
  }
  
  void gitno_buffer_setup_fromstream(git_stream *st, gitno_buffer *buf, char *data, size_t len)
  {
  	memset(data, 0x0, len);
  	buf->data = data;
  	buf->len = len;
  	buf->offset = 0;
  	buf->recv = recv_stream;
  	buf->cb_data = st;
  }
  
  /* Consume up to ptr and move the rest of the buffer to the beginning */
  int gitno_consume(gitno_buffer *buf, const char *ptr)
  {
  	size_t consumed;
  
  	GIT_ASSERT(ptr - buf->data >= 0);
  	GIT_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;
  
  	return 0;
  }
  
  /* 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;
  }
  
  /* Match host names according to RFC 2818 rules */
  int gitno__match_host(const char *pattern, const char *host)
  {
  	for (;;) {
  		char c = git__tolower(*pattern++);
  
  		if (c == '\0')
  			return *host ? -1 : 0;
  
  		if (c == '*') {
  			c = *pattern;
  			/* '*' at the end matches everything left */
  			if (c == '\0')
  				return 0;
  
  	/*
  	 * We've found a pattern, so move towards the next matching
  	 * char. The '.' is handled specially because wildcards aren't
  	 * allowed to cross subdomains.
  	 */
  
  			while(*host) {
  				char h = git__tolower(*host);
  				if (c == h)
  					return gitno__match_host(pattern, host++);
  				if (h == '.')
  					return gitno__match_host(pattern, host);
  				host++;
  			}
  			return -1;
  		}
  
  		if (c != git__tolower(*host++))
  			return -1;
  	}
  
  	return -1;
  }
  

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