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mark: improved parsing of environ vars

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This commit is contained in:
Steffen Vogel 2015-07-20 16:07:36 +02:00
parent dd8e4fd7ec
commit 8bb1700ffd
1 changed files with 14 additions and 3 deletions
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17
mark.c
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@ -23,6 +23,8 @@
#include <sys/types.h>
#include <sys/socket.h>
#define DEF_MARK 0xCD
typedef int (*socket_t)(int domain, int type, int protocol);
static socket_t _socket;
@ -36,10 +38,19 @@ int socket(int domain, int type, int protocol)
if (sd >= 0) {
if (domain == AF_INET || domain == AF_INET6) {
char * env = getenv("MARK");
int mark = env ? atoi(env) : 0xCD;
unsigned mark;
char *endptr, *env = getenv("MARK");
if (env != NULL) {
mark = strtoul(env, &endptr, 0);
if (env == endptr) /* skip if invalid mark given */
return sd;
}
else
mark = DEF_MARK;
printf("Setting SO_MARK for fd=%u to %#x\n", sd, mark);
printf("mark: setting SO_MARK for fd=%u to %#x\n", sd, mark);
setsockopt(sd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark));
}