comment on

This also works for me on RedHat 7.3 Linux. Here is the relevant portion of the strace output; perhaps it will be useful to compare against on whatever you're running on:

socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 4
fcntl64(4, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFSOCK|0777, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
+ 0) = 0x40112000
_llseek(4, 0, 0xbfffe900, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
fcntl64(4, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFSOCK|0777, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
+ 0) = 0x40113000
_llseek(4, 0, 0xbfffe900, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
fcntl64(4, F_SETFD, FD_CLOEXEC)         = 0
brk(0x818e000)                          = 0x818e000
setsockopt(4, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
bind(4, {sin_family=AF_INET, sin_port=htons(67), sin_addr=inet_addr("0
+.0.0.0")}}, 16) = 0
recvfrom(4, "\1\1\6\0ZeH\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0".
+.., 1024, 0, {sin_family=AF_INET, sin_port=htons(68), sin_addr=inet_a
+ddr("0.0.0.0")}}, [16]) = 300
fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 4), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
+ 0) = 0x40114000
write(1, "Saw a bootp request.\n", 21)  = 21
[download]

In reply to Re: Intercepting UDP broadcasts by sfink
in thread Intercepting UDP broadcasts by Abigail-II

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


Think about Loose Coupling
	PerlMonks