On Tue, 5 Oct 2004 12:00:37 -0000 (UTC), dave@superelite.net wrote:

OK, awake again and looking into the beolow problem more... my program pulls a message off of a UDP datagram socket with

int s = socket(AF_INET, SOCK_DGRAM, 0); int iVal; struct sockaddr_in oFromAddr; char msg[1024]; int iMsgLen; socklen_t iFromLen;

oMyAddr.sin_family = AF_INET; oMyAddr.sin_addr.s_addr = htonl(INADDR_ANY); oMyAddr.sin_port = htons(5060); iVal = bind(s, (struct sockaddr *) &oMyAddr, sizeof (oMyAddr));

int iVal = recvfrom(s, (void *)&msg, iMsgLen, 0, (struct sockaddr *) &oFromAddr, &iFromLen);

If this is the actual code, iMsgLen is being used uninitialized. Also, you're passing the address of msg, which is incorrect. Here's working code: #include <iostream> #include <cstdlib> #include <cstdio> #include #include #include using namespace std; int main () { int s = socket (AF_INET, SOCK_DGRAM, 0); if (s < 0) { perror ("socket"); return 1; } struct sockaddr_in addr = {0}; addr.sin_family = AF_INET; addr.sin_addr.s_addr = htonl(INADDR_ANY); addr.sin_port = htons(5060); if (bind (s, (struct sockaddr *) &addr, sizeof (addr)) != 0) { perror ("bind"); return 1; } char msg[1024]; while (1) { socklen_t addrlen = sizeof (addr); int len = recvfrom (s, (void *) msg, sizeof (msg), 0, (struct sockaddr*) &addr, &addrlen); if (len <= 0) { perror ("recvfrom"); return 1; } cout.write (msg, len); cout.flush (); } return 0; } -- Caleb Epstein caleb.epstein@gmail.com

OK, awake again and looking into the beolow problem more... my program pulls a message off of a UDP datagram socket with

int s = socket(AF_INET, SOCK_DGRAM, 0); int iVal; struct sockaddr_in oFromAddr; char msg[1024]; int iMsgLen; socklen_t iFromLen;

oMyAddr.sin_family = AF_INET; oMyAddr.sin_addr.s_addr = htonl(INADDR_ANY); oMyAddr.sin_port = htons(5060); iVal = bind(s, (struct sockaddr *) &oMyAddr, sizeof (oMyAddr));

int iVal = recvfrom(s, (void *)&msg, iMsgLen, 0, (struct sockaddr *) &oFromAddr, &iFromLen);

When I link to libboost_regex and i get past this last line, the msg buffer is still filled with null characters and the return value of recvfrom is 0-it didnt get anything off of the socket. All I am doing is linking the lib, im not calling on headers or the lib in any way. Taking -lboost_regex out fo the linker flags fixes that issue. Also, when i create char msg[1024], the contents of msg are trash, not repeating null characters(as they are when boost_regex is linked to). What is boost doing, im pretty new to it.. thanks, dave

It shouldn't be doing anything that would influence the contents of your own code in the way you describe, the only thing I can think of is that the version you are using (it's a binary right?) was built with a different compiler version, or settings, from the ones you are using. What happens if you rebuild Boost.Regex from source and link to that? John.