#define socket_args int domain, int type, int protocol
#define close_args int fd
#define bind_args int fd, const struct sockaddr *addr, socklen_t addrlen
+#define sendto_args int fd, const void *buf, size_t len, int flags, \
+ const struct sockaddr *addr, socklen_t addrlen
#define setsockopt_args int fd, int level, int optname, \
const void *optval, socklen_t optlen
#define getsockname_args int fd, struct sockaddr *addr, socklen_t *addrlen
X(socket, int, (domain,type,protocol)) \
X(close, int, (fd)) \
X(bind, int, (fd,addr,addrlen)) \
+ X(sendto, ssize_t, (fd,buf,len,flags,addr,addrlen)) \
X(setsockopt, int, (fd,level,optname,optval,optlen)) \
X(getsockname,int, (fd,addr,addrlen))
static int tablesz;
static fdinfo *lookup(int fd) {
- if (fd>=tablesz) return 0;
+ if (fd<0 || fd>=tablesz) return 0;
return table[fd];
}
char *comma=strchr(str,',');
if (!comma) { errno=ESRCH; return -1; }
*comma++=0;
- if (inet_pton(af,str,iav)) return -1;
+ int r=inet_pton(af,str,iav);
+//fprintf(stderr,"inet_pton(%d,\"%s\",)=%d\n",af,str,r);
+ if (r<0) return -1;
+ if (r==0) { errno=ENOTTY; return -1; }
char *ep;
errno=0;
}
WRAP(close) {
- if (fd<tablesz) {
+ if (fd>=0 && fd<tablesz) {
free(table[fd]);
table[fd]=0;
}
// (unsigned long)sunlen);
errno=EDOM; return -1;
}
- if (str2addrport(sun.sun_path,addr,addrlen)) return -1;
+ char *slash=strrchr(sun.sun_path,'/');
+ if (str2addrport(slash ? slash+1 : sun.sun_path,
+ addr,addrlen)) return -1;
return 0;
}
+
+ssize_t TWRAP(sendto) {
+ fdinfo *ent=lookup(fd);
+ if (!ent) return old_sendto(fd,buf,len,flags,addr,addrlen);
+
+ if (flags) { errno=ENOEXEC; return -1; }
+
+ const char *leaf=getenv("UDP_PRELOAD_SERVER");
+ if (!leaf) leaf="udp";
+ if (strlen(leaf) > ADDRPORTSTRLEN) { errno=ENAMETOOLONG; return -1; }
+ struct sockaddr_un sun;
+ char *p=sun_prep(&sun);
+ strcpy(p,leaf);
+
+ char tbuf[ADDRPORTSTRLEN+1];
+ memset(tbuf,0,sizeof(tbuf));
+ if (addrport2str(tbuf,addr,addrlen)) return -1;
+
+ struct iovec iov[2];
+ iov[0].iov_base=tbuf;
+ iov[0].iov_len=sizeof(tbuf);
+ iov[1].iov_base=(void*)buf;
+ iov[1].iov_len=len;
+
+ struct msghdr m;
+ memset(&m,0,sizeof(m));
+ m.msg_name=&sun;
+ m.msg_namelen=sizeof(sun);
+ m.msg_iov=iov;
+ m.msg_iovlen=2;
+
+ return sendmsg(fd,&m,0);
+}