history purge

nfq/helpers.c

@@ -0,0 +1,120 @@
+#define _GNU_SOURCE
+
+#include "helpers.h"
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+
+void hexdump_limited_dlog(const uint8_t *data, size_t size, size_t limit)
+{
+	size_t k;
+	bool bcut=false;
+	if (size>limit)
+	{
+		size=limit;
+		bcut = true;
+	}
+	if (!size) return;
+	for (k=0;k<size;k++) DLOG("%02X ",data[k]);
+	DLOG(bcut ? "... : " : ": ");
+	for (k=0;k<size;k++) DLOG("%c",data[k]>=0x20 && data[k]<=0x7F ? (char)data[k] : '.');
+	if (bcut) DLOG(" ...");
+}
+
+char *strncasestr(const char *s,const char *find, size_t slen)
+{
+	char c, sc;
+	size_t len;
+
+	if ((c = *find++) != '\0')
+	{
+		len = strlen(find);
+		do
+		{
+			do
+			{
+				if (slen-- < 1 || (sc = *s++) == '\0') return NULL;
+			} while (toupper(c) != toupper(sc));
+			if (len > slen)	return NULL;
+		} while (strncasecmp(s, find, len) != 0);
+		s--;
+	}
+	return (char *)s;
+}
+
+bool load_file(const char *filename,void *buffer,size_t *buffer_size)
+{
+	FILE *F;
+
+	F = fopen(filename,"rb");
+	if (!F) return false;
+
+	*buffer_size = fread(buffer,1,*buffer_size,F);
+	if (ferror(F))
+	{
+		fclose(F);
+		return false;
+	}
+
+	fclose(F);
+	return true;
+}
+bool load_file_nonempty(const char *filename,void *buffer,size_t *buffer_size)
+{
+	bool b = load_file(filename,buffer,buffer_size);
+	return b && *buffer_size;
+}
+
+
+
+void print_sockaddr(const struct sockaddr *sa)
+{
+	char str[64];
+	switch (sa->sa_family)
+	{
+	case AF_INET:
+		if (inet_ntop(sa->sa_family, &((struct sockaddr_in*)sa)->sin_addr, str, sizeof(str)))
+			printf("%s:%d", str, ntohs(((struct sockaddr_in*)sa)->sin_port));
+		break;
+	case AF_INET6:
+		if (inet_ntop(sa->sa_family, &((struct sockaddr_in6*)sa)->sin6_addr, str, sizeof(str)))
+			printf("[%s]:%d", str, ntohs(((struct sockaddr_in6*)sa)->sin6_port));
+		break;
+	default:
+		printf("UNKNOWN_FAMILY_%d", sa->sa_family);
+	}
+}
+
+void dbgprint_socket_buffers(int fd)
+{
+	if (params.debug)
+	{
+		int v;
+		socklen_t sz;
+		sz=sizeof(int);
+		if (!getsockopt(fd,SOL_SOCKET,SO_RCVBUF,&v,&sz))
+			DLOG("fd=%d SO_RCVBUF=%d\n",fd,v)
+		sz=sizeof(int);
+		if (!getsockopt(fd,SOL_SOCKET,SO_SNDBUF,&v,&sz))
+			DLOG("fd=%d SO_SNDBUF=%d\n",fd,v)
+	}
+}
+bool set_socket_buffers(int fd, int rcvbuf, int sndbuf)
+{
+	DLOG("set_socket_buffers fd=%d rcvbuf=%d sndbuf=%d\n",fd,rcvbuf,sndbuf)
+	if (rcvbuf && setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(int)) <0)
+	{
+		perror("setsockopt (SO_RCVBUF): ");
+		close(fd);
+		return false;
+	}
+	if (sndbuf && setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(int)) <0)
+	{
+		perror("setsockopt (SO_SNDBUF): ");
+		close(fd);
+		return false;
+	}
+	dbgprint_socket_buffers(fd);
+	return true;
+}