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https://github.com/servalproject/serval-dna.git
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37 lines
716 B
C
37 lines
716 B
C
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include "socket.h"
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#include "blocking.h"
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static void enable_bsd_fragmentation(int fd)
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{
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#ifdef IP_DONTFRAG
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const int x = 0;
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setsockopt(fd,SOL_IP,IP_DONTFRAG,&x,sizeof x);
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#endif
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}
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static void enable_linux_fragmentation(int fd)
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{
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#ifdef IP_MTU_DISCOVER
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#ifdef IP_PMTUDISC_DONT
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const int x = IP_PMTUDISC_DONT;
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setsockopt(fd,SOL_IP,IP_MTU_DISCOVER,&x,sizeof x);
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#endif
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#endif
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}
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int socket_udp(void)
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{
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int fd = socket(PF_INET,SOCK_DGRAM,0);
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if (fd == -1) return -1;
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fcntl(fd,F_SETFD,1);
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blocking_disable(fd);
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enable_bsd_fragmentation(fd);
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enable_linux_fragmentation(fd);
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return fd;
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}
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