Browse code
added seeking maximum receive buffer size
Jiri Kuthan authored on 12/11/2001 19:51:59
Showing 2 changed files
| ... | ... |
@@ -26,7 +26,13 @@ int udp_sock; |
| 26 | 26 |
int udp_init(unsigned long ip, unsigned short port) |
| 27 | 27 |
{
|
| 28 | 28 |
struct sockaddr_in* addr; |
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- int optval; |
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+ int optval, optvallen; |
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+ int ioptval, ioptvallen; |
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+ int foptval, foptvallen; |
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+ int voptval, voptvallen; |
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+ int i; |
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+ int phase=0; |
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+ |
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| 30 | 36 |
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| 31 | 37 |
addr=(struct sockaddr_in*)malloc(sizeof(struct sockaddr)); |
| 32 | 38 |
if (addr==0){
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| ... | ... |
@@ -51,6 +57,68 @@ int udp_init(unsigned long ip, unsigned short port) |
| 51 | 57 |
goto error; |
| 52 | 58 |
} |
| 53 | 59 |
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+ /* jku: try to increase buffer size as much as we can */ |
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+ ioptvallen=sizeof(ioptval); |
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+ if (getsockopt( udp_sock, SOL_SOCKET, SO_RCVBUF, (void*) &ioptval, |
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+ &ioptvallen) == -1 ) |
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+ {
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+ LOG(L_ERR, "ERROR: udp_init: getsockopt: %s\n", strerror(errno)); |
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+ goto error; |
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+ } |
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+ if ( ioptval==0 ) |
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+ {
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+ LOG(L_DBG, "DEBUG: udp_init: SO_RCVBUF initialy set to 0; resetting to %d\n", |
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+ BUFFER_INCREMENT ); |
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+ ioptval=BUFFER_INCREMENT; |
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+ } else LOG(L_INFO, "INFO: udp_init: SO_RCVBUF is initially %d\n", ioptval ); |
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+ for (optval=ioptval; optval < MAX_RECV_BUFFER_SIZE ; ) {
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+ /* increase size; double in initial phase, add linearly later */ |
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+ if (phase==0) optval <<= 1; else optval+=BUFFER_INCREMENT; |
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+ LOG(L_DBG, "DEBUG: udp_init: trying SO_RCVBUF: %d\n", optval ); |
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+ if (setsockopt( udp_sock, SOL_SOCKET, SO_RCVBUF, |
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+ (void*)&optval, sizeof(optval)) ==-1) |
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+ {
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+ LOG(L_DBG, "DEBUG: udp_init: SOL_SOCKET failed for %d, phase %d: %s\n", |
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+ optval, phase, strerror(errno) ); |
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+ /* if setting buffer size failed and still in the aggressive |
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+ phase, try less agressively; otherwise give up |
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+ */ |
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+ if (phase==0) { phase=1; optval >>=1 ; continue; }
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+ else break; |
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+ } |
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+ /* verify if change has taken effect */ |
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+ voptvallen=sizeof(voptval); |
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+ if (getsockopt( udp_sock, SOL_SOCKET, SO_RCVBUF, (void*) &voptval, |
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+ &voptvallen) == -1 ) |
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+ {
|
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+ LOG(L_ERR, "ERROR: udp_init: getsockopt: %s\n", strerror(errno)); |
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+ goto error; |
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+ } else {
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+ LOG(L_DBG, "DEBUG: setting SO_RCVBUF; set=%d,verify=%d\n", |
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+ optval, voptval); |
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+ if (voptval<optval) {
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+ LOG(L_DBG, "DEBUG: setting SO_RCVBUF has no effect\n"); |
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+ /* if setting buffer size failed and still in the aggressive |
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+ phase, try less agressively; otherwise give up |
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+ */ |
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+ if (phase==0) { phase=1; optval >>=1 ; continue; }
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+ else break; |
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+ } |
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+ } |
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+ |
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+ } /* for ... */ |
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+ foptvallen=sizeof(foptval); |
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+ if (getsockopt( udp_sock, SOL_SOCKET, SO_RCVBUF, (void*) &foptval, |
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+ &foptvallen) == -1 ) |
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+ {
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+ LOG(L_ERR, "ERROR: udp_init: getsockopt: %s\n", strerror(errno)); |
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+ goto error; |
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+ } |
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+ LOG(L_INFO, "INFO: udp_init: SO_RCVBUF is finally %d\n", foptval ); |
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+ |
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+ |
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+ /* EoJKU */ |
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+ |
|
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if (bind(udp_sock, (struct sockaddr*) addr, sizeof(struct sockaddr))==-1){
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LOG(L_ERR, "ERROR: udp_init: bind: %s\n", strerror(errno)); |
| 56 | 124 |
goto error; |