mirror of
https://github.com/transmission/transmission
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107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/* $Id: minissdpc.c,v 1.4 2007/12/19 14:56:58 nanard Exp $ */
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/* Project : miniupnp
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* Author : Thomas BERNARD
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* copyright (c) 2005-2007 Thomas Bernard
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* This software is subjet to the conditions detailed in the
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* provided LICENCE file. */
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/*#include <syslog.h>*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include "minissdpc.h"
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#include "miniupnpc.h"
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#define DECODELENGTH(n, p) n = 0; \
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do { n = (n << 7) | (*p & 0x7f); } \
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while(*(p++)&0x80);
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#define CODELENGTH(n, p) do { *p = (n & 0x7f) | ((n > 0x7f) ? 0x80 : 0); \
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p++; n >>= 7; } while(n);
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struct UPNPDev *
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getDevicesFromMiniSSDPD(const char * devtype, const char * socketpath)
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{
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struct UPNPDev * tmp;
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struct UPNPDev * devlist = NULL;
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unsigned char buffer[2048];
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ssize_t n;
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unsigned char * p;
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unsigned char * url;
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unsigned int i;
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unsigned int urlsize, stsize, usnsize, l;
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int s;
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struct sockaddr_un addr;
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s = socket(AF_UNIX, SOCK_STREAM, 0);
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if(s < 0)
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{
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/*syslog(LOG_ERR, "socket(unix): %m");*/
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perror("socket(unix)");
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return NULL;
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}
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addr.sun_family = AF_UNIX;
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strncpy(addr.sun_path, socketpath, sizeof(addr.sun_path));
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if(connect(s, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
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{
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/*syslog(LOG_WARNING, "connect(\"%s\"): %m", socketpath);*/
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close(s);
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return NULL;
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}
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stsize = strlen(devtype);
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buffer[0] = 1;
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p = buffer + 1;
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l = stsize; CODELENGTH(l, p);
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memcpy(p, devtype, stsize);
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p += stsize;
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if(write(s, buffer, p - buffer) < 0)
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{
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/*syslog(LOG_ERR, "write(): %m");*/
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perror("minissdpc.c: write()");
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close(s);
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return NULL;
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}
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n = read(s, buffer, sizeof(buffer));
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if(n<=0)
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{
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perror("minissdpc.c: read()");
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close(s);
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return NULL;
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}
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p = buffer + 1;
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for(i = 0; i < buffer[0]; i++)
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{
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if(p+2>=buffer+sizeof(buffer))
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break;
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DECODELENGTH(urlsize, p);
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if(p+urlsize+2>=buffer+sizeof(buffer))
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break;
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url = p;
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p += urlsize;
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DECODELENGTH(stsize, p);
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if(p+stsize+2>=buffer+sizeof(buffer))
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break;
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tmp = (struct UPNPDev *)malloc(sizeof(struct UPNPDev)+urlsize+stsize);
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tmp->pNext = devlist;
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tmp->descURL = tmp->buffer;
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tmp->st = tmp->buffer + 1 + urlsize;
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memcpy(tmp->buffer, url, urlsize);
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tmp->buffer[urlsize] = '\0';
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memcpy(tmp->buffer + urlsize + 1, p, stsize);
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p += stsize;
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tmp->buffer[urlsize+1+stsize] = '\0';
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devlist = tmp;
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/* added for compatibility with recent versions of MiniSSDPd
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* >= 2007/12/19 */
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DECODELENGTH(usnsize, p);
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p += usnsize;
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if(p>buffer + sizeof(buffer))
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break;
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}
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close(s);
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return devlist;
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}
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