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openSUSE:12.2
libpcap
libpcap-1.0.0-filter-fix.patch
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File libpcap-1.0.0-filter-fix.patch of Package libpcap
Index: pcap-bpf.c =================================================================== --- pcap-bpf.c.orig +++ pcap-bpf.c @@ -483,7 +483,7 @@ bpf_open(pcap_t *p) fd = open(device, O_RDWR); if (fd == -1 && errno == EACCES) fd = open(device, O_RDONLY); - } while (fd < 0 && errno == EBUSY); + } while (fd < 0 && errno == EBUSY && n < 1000); /* * XXX better message for all minors used Index: pcap-linux.c =================================================================== --- pcap-linux.c.orig +++ pcap-linux.c @@ -2421,8 +2421,30 @@ pcap_setfilter_linux_common(pcap_t *hand if (can_filter_in_kernel) { if ((err = set_kernel_filter(handle, &fcode)) == 0) { + char buf[1024]; + int oldflags; + int ret; + unsigned int received = 0, rec_len = 0; + socklen_t optlen = sizeof(rec_len); /* Installation succeded - using kernel filter. */ handle->md.use_bpf = 1; + + oldflags = fcntl(handle->fd, F_GETFL, 0); + oldflags |= O_NONBLOCK; + fcntl(handle->fd, F_SETFL, oldflags); + getsockopt(handle->fd, SOL_SOCKET, SO_RCVBUF, + (char *)&rec_len, &optlen); + + /* now read all packets received until now */ + while((ret = read(handle->fd, buf, 1024)) > 0 + && received < rec_len) { + received += ret; + } + + if(oldflags > 0) { + oldflags &= ~O_NONBLOCK; + fcntl(handle->fd, F_SETFL, oldflags); + } } else if (err == -1) /* Non-fatal error */ {
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